./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:53:03,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:53:03,958 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:53:03,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:53:03,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:53:03,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:53:03,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:53:03,988 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:53:03,988 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:53:03,988 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:53:03,989 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:53:03,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:53:03,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:53:03,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:53:03,990 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:53:03,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:53:03,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:53:03,991 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:53:03,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:53:03,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:53:03,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:53:03,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:53:03,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:53:03,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:53:03,993 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:53:03,993 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:53:03,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:53:03,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:53:03,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:53:03,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:53:03,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:53:03,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:53:03,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:53:03,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:53:03,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:53:03,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:53:03,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:53:03,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:53:03,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:53:03,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:53:03,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:53:03,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:53:03,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:53:03,997 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:53:04,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:53:04,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:53:04,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:53:04,213 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:53:04,213 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:53:04,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-28 03:53:05,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:53:05,505 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:53:05,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-28 03:53:05,517 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781f4272b/180bb50b54474600968198f58dfeb8cc/FLAG87d6dc6e2 [2024-06-28 03:53:05,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781f4272b/180bb50b54474600968198f58dfeb8cc [2024-06-28 03:53:05,530 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:53:05,530 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:53:05,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.opt.yml/witness.yml [2024-06-28 03:53:05,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:53:05,717 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:53:05,718 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:53:05,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:53:05,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:53:05,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:53:05" (1/2) ... [2024-06-28 03:53:05,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aff2a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:53:05, skipping insertion in model container [2024-06-28 03:53:05,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:53:05" (1/2) ... [2024-06-28 03:53:05,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17b29ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:53:05, skipping insertion in model container [2024-06-28 03:53:05,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:05" (2/2) ... [2024-06-28 03:53:05,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aff2a65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:05, skipping insertion in model container [2024-06-28 03:53:05,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:05" (2/2) ... [2024-06-28 03:53:05,726 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:53:05,816 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:53:05,817 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) [2024-06-28 03:53:05,817 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) [2024-06-28 03:53:05,818 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) [2024-06-28 03:53:05,818 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:53:05,818 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-28 03:53:05,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:53:06,134 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:53:06,143 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:53:06,277 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:53:06,310 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:53:06,311 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06 WrapperNode [2024-06-28 03:53:06,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:53:06,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:53:06,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:53:06,312 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:53:06,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,367 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-28 03:53:06,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:53:06,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:53:06,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:53:06,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:53:06,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,400 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,415 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-28 03:53:06,415 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,427 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,429 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:53:06,435 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:53:06,435 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:53:06,435 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:53:06,436 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (1/1) ... [2024-06-28 03:53:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:53:06,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:53:06,473 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 03:53:06,490 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 03:53:06,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:53:06,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:53:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:53:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:53:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:53:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:53:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:53:06,505 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:53:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:53:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:53:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:53:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:53:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:53:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:53:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:53:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:53:06,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:53:06,508 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 03:53:06,629 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:53:06,631 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:53:07,171 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:53:07,171 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:53:07,522 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:53:07,522 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:53:07,522 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:53:07 BoogieIcfgContainer [2024-06-28 03:53:07,522 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:53:07,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:53:07,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:53:07,527 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:53:07,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:53:05" (1/4) ... [2024-06-28 03:53:07,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342ad32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:53:07, skipping insertion in model container [2024-06-28 03:53:07,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:05" (2/4) ... [2024-06-28 03:53:07,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342ad32d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:53:07, skipping insertion in model container [2024-06-28 03:53:07,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:06" (3/4) ... [2024-06-28 03:53:07,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342ad32d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:53:07, skipping insertion in model container [2024-06-28 03:53:07,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:53:07" (4/4) ... [2024-06-28 03:53:07,530 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.opt.i [2024-06-28 03:53:07,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:53:07,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:53:07,544 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:53:07,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:53:07,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:53:07,672 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:53:07,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:53:07,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:53:07,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:53:07,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:53:07,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:53:07,753 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;@575e437c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:53:07,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:53:07,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:53:07,771 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:53:07,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:53:07,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:07,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:53:07,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:07,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 848284857, now seen corresponding path program 1 times [2024-06-28 03:53:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503895514] [2024-06-28 03:53:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:09,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:09,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503895514] [2024-06-28 03:53:09,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503895514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:53:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852840786] [2024-06-28 03:53:09,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:53:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:53:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:53:09,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:53:09,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:09,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:09,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:53:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:10,022 INFO L124 PetriNetUnfolderBase]: 1217/1862 cut-off events. [2024-06-28 03:53:10,023 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 03:53:10,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3809 conditions, 1862 events. 1217/1862 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8623 event pairs, 713 based on Foata normal form. 2/1816 useless extension candidates. Maximal degree in co-relation 3797. Up to 1843 conditions per place. [2024-06-28 03:53:10,034 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 03:53:10,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-28 03:53:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:53:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:53:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 03:53:10,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 03:53:10,044 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-28 03:53:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-28 03:53:10,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:10,048 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:53:10,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:53:10,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:53:10,052 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:53:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:10,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:10,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:10,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:53:10,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:10,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash -842003272, now seen corresponding path program 1 times [2024-06-28 03:53:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:10,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059410189] [2024-06-28 03:53:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059410189] [2024-06-28 03:53:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059410189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:11,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:11,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:53:11,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993151044] [2024-06-28 03:53:11,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:53:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:53:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:53:11,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:11,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:11,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:11,696 INFO L124 PetriNetUnfolderBase]: 1709/2563 cut-off events. [2024-06-28 03:53:11,697 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2024-06-28 03:53:11,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5867 conditions, 2563 events. 1709/2563 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11573 event pairs, 1050 based on Foata normal form. 3/2564 useless extension candidates. Maximal degree in co-relation 5855. Up to 2530 conditions per place. [2024-06-28 03:53:11,708 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-28 03:53:11,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 278 flow [2024-06-28 03:53:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:53:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:53:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-28 03:53:11,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:53:11,710 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 84 transitions. [2024-06-28 03:53:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 278 flow [2024-06-28 03:53:11,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:53:11,712 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-28 03:53:11,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-28 03:53:11,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-28 03:53:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-28 03:53:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:11,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:11,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:11,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:53:11,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:11,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -332296489, now seen corresponding path program 1 times [2024-06-28 03:53:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334341990] [2024-06-28 03:53:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334341990] [2024-06-28 03:53:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334341990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:12,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:53:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480282673] [2024-06-28 03:53:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:12,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:53:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:53:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:53:12,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:12,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:12,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:12,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:12,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:13,446 INFO L124 PetriNetUnfolderBase]: 1703/2554 cut-off events. [2024-06-28 03:53:13,447 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-28 03:53:13,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 2554 events. 1703/2554 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11499 event pairs, 899 based on Foata normal form. 3/2555 useless extension candidates. Maximal degree in co-relation 6474. Up to 2502 conditions per place. [2024-06-28 03:53:13,459 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-28 03:53:13,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 368 flow [2024-06-28 03:53:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:53:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:53:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-28 03:53:13,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-28 03:53:13,464 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 103 transitions. [2024-06-28 03:53:13,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 368 flow [2024-06-28 03:53:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 03:53:13,468 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-28 03:53:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-28 03:53:13,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 03:53:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-28 03:53:13,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:53:13,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:13,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1711255369, now seen corresponding path program 1 times [2024-06-28 03:53:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789801572] [2024-06-28 03:53:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789801572] [2024-06-28 03:53:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789801572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:15,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:53:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247426286] [2024-06-28 03:53:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:53:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:53:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:53:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:15,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:15,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:15,881 INFO L124 PetriNetUnfolderBase]: 1697/2545 cut-off events. [2024-06-28 03:53:15,882 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-06-28 03:53:15,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7103 conditions, 2545 events. 1697/2545 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11440 event pairs, 748 based on Foata normal form. 3/2546 useless extension candidates. Maximal degree in co-relation 7085. Up to 2474 conditions per place. [2024-06-28 03:53:15,895 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-28 03:53:15,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 464 flow [2024-06-28 03:53:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-28 03:53:15,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 03:53:15,896 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 6 states and 122 transitions. [2024-06-28 03:53:15,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 464 flow [2024-06-28 03:53:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:15,899 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 236 flow [2024-06-28 03:53:15,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-28 03:53:15,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 03:53:15,900 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 236 flow [2024-06-28 03:53:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:15,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:15,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:53:15,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:15,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1509307658, now seen corresponding path program 1 times [2024-06-28 03:53:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557747753] [2024-06-28 03:53:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557747753] [2024-06-28 03:53:17,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557747753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:17,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:17,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067917545] [2024-06-28 03:53:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:17,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:17,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:17,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:17,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:18,325 INFO L124 PetriNetUnfolderBase]: 1688/2530 cut-off events. [2024-06-28 03:53:18,326 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-06-28 03:53:18,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2530 events. 1688/2530 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11335 event pairs, 579 based on Foata normal form. 6/2534 useless extension candidates. Maximal degree in co-relation 7607. Up to 2421 conditions per place. [2024-06-28 03:53:18,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-28 03:53:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 520 flow [2024-06-28 03:53:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 03:53:18,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-28 03:53:18,345 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 236 flow. Second operand 7 states and 136 transitions. [2024-06-28 03:53:18,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 520 flow [2024-06-28 03:53:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 488 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:18,354 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 253 flow [2024-06-28 03:53:18,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-28 03:53:18,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:53:18,357 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 253 flow [2024-06-28 03:53:18,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:18,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:18,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:53:18,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:18,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2018931377, now seen corresponding path program 1 times [2024-06-28 03:53:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:18,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256868247] [2024-06-28 03:53:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256868247] [2024-06-28 03:53:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256868247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:53:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30482405] [2024-06-28 03:53:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:53:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:53:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:53:20,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:20,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:20,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:20,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:20,837 INFO L124 PetriNetUnfolderBase]: 1340/2089 cut-off events. [2024-06-28 03:53:20,837 INFO L125 PetriNetUnfolderBase]: For 4185/4233 co-relation queries the response was YES. [2024-06-28 03:53:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6558 conditions, 2089 events. 1340/2089 cut-off events. For 4185/4233 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9935 event pairs, 506 based on Foata normal form. 4/2010 useless extension candidates. Maximal degree in co-relation 6537. Up to 1959 conditions per place. [2024-06-28 03:53:20,851 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-28 03:53:20,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 417 flow [2024-06-28 03:53:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:53:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:53:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-28 03:53:20,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:53:20,852 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 253 flow. Second operand 5 states and 91 transitions. [2024-06-28 03:53:20,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 417 flow [2024-06-28 03:53:20,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 376 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:20,856 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 257 flow [2024-06-28 03:53:20,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 03:53:20,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:53:20,859 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 257 flow [2024-06-28 03:53:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:20,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:20,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:53:20,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1858194646, now seen corresponding path program 1 times [2024-06-28 03:53:20,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465556473] [2024-06-28 03:53:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465556473] [2024-06-28 03:53:22,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465556473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:22,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:22,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422185115] [2024-06-28 03:53:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:22,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:22,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:22,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:22,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:22,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:23,988 INFO L124 PetriNetUnfolderBase]: 1696/2547 cut-off events. [2024-06-28 03:53:23,989 INFO L125 PetriNetUnfolderBase]: For 6371/6381 co-relation queries the response was YES. [2024-06-28 03:53:23,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 2547 events. 1696/2547 cut-off events. For 6371/6381 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11419 event pairs, 583 based on Foata normal form. 16/2560 useless extension candidates. Maximal degree in co-relation 8539. Up to 2400 conditions per place. [2024-06-28 03:53:24,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-28 03:53:24,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 553 flow [2024-06-28 03:53:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 03:53:24,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 03:53:24,010 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 257 flow. Second operand 6 states and 103 transitions. [2024-06-28 03:53:24,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 553 flow [2024-06-28 03:53:24,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 530 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:24,014 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 346 flow [2024-06-28 03:53:24,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-28 03:53:24,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-28 03:53:24,016 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 346 flow [2024-06-28 03:53:24,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:24,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:24,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:24,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:53:24,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:24,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 280032688, now seen corresponding path program 1 times [2024-06-28 03:53:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002554276] [2024-06-28 03:53:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:25,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:25,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002554276] [2024-06-28 03:53:25,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002554276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:25,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:25,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071760696] [2024-06-28 03:53:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:25,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:25,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:25,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:25,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:25,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:26,800 INFO L124 PetriNetUnfolderBase]: 1760/2646 cut-off events. [2024-06-28 03:53:26,800 INFO L125 PetriNetUnfolderBase]: For 8849/8849 co-relation queries the response was YES. [2024-06-28 03:53:26,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 2646 events. 1760/2646 cut-off events. For 8849/8849 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11911 event pairs, 599 based on Foata normal form. 2/2644 useless extension candidates. Maximal degree in co-relation 9913. Up to 2447 conditions per place. [2024-06-28 03:53:26,813 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-28 03:53:26,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 788 flow [2024-06-28 03:53:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:53:26,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 03:53:26,816 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 346 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:53:26,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 788 flow [2024-06-28 03:53:26,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 753 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:26,823 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-28 03:53:26,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-28 03:53:26,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 03:53:26,825 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-28 03:53:26,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:26,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:26,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:26,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:53:26,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:26,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1126509966, now seen corresponding path program 2 times [2024-06-28 03:53:26,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:26,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104714601] [2024-06-28 03:53:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:26,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:28,570 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 03:53:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104714601] [2024-06-28 03:53:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104714601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:28,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076180746] [2024-06-28 03:53:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:28,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:28,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:28,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:28,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:28,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:29,610 INFO L124 PetriNetUnfolderBase]: 1782/2679 cut-off events. [2024-06-28 03:53:29,611 INFO L125 PetriNetUnfolderBase]: For 10793/10793 co-relation queries the response was YES. [2024-06-28 03:53:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10614 conditions, 2679 events. 1782/2679 cut-off events. For 10793/10793 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12042 event pairs, 623 based on Foata normal form. 3/2678 useless extension candidates. Maximal degree in co-relation 10584. Up to 2461 conditions per place. [2024-06-28 03:53:29,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2024-06-28 03:53:29,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 911 flow [2024-06-28 03:53:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 03:53:29,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:53:29,625 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 6 states and 108 transitions. [2024-06-28 03:53:29,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 911 flow [2024-06-28 03:53:29,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 871 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:29,635 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 634 flow [2024-06-28 03:53:29,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2024-06-28 03:53:29,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 03:53:29,635 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 634 flow [2024-06-28 03:53:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:29,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:29,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:29,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:53:29,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:29,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1790902896, now seen corresponding path program 3 times [2024-06-28 03:53:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:29,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615158931] [2024-06-28 03:53:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:29,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615158931] [2024-06-28 03:53:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615158931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:31,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684461955] [2024-06-28 03:53:31,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:31,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:32,409 INFO L124 PetriNetUnfolderBase]: 1752/2635 cut-off events. [2024-06-28 03:53:32,410 INFO L125 PetriNetUnfolderBase]: For 13085/13095 co-relation queries the response was YES. [2024-06-28 03:53:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10613 conditions, 2635 events. 1752/2635 cut-off events. For 13085/13095 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11800 event pairs, 605 based on Foata normal form. 17/2648 useless extension candidates. Maximal degree in co-relation 10581. Up to 2435 conditions per place. [2024-06-28 03:53:32,423 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 30 changer transitions 0/103 dead transitions. [2024-06-28 03:53:32,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 900 flow [2024-06-28 03:53:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:53:32,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:53:32,424 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 634 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:53:32,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 900 flow [2024-06-28 03:53:32,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 814 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:32,437 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 622 flow [2024-06-28 03:53:32,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=622, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-28 03:53:32,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 03:53:32,438 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 622 flow [2024-06-28 03:53:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:32,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:32,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:32,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:53:32,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash 26120073, now seen corresponding path program 1 times [2024-06-28 03:53:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683611374] [2024-06-28 03:53:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683611374] [2024-06-28 03:53:34,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683611374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:34,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:34,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227665943] [2024-06-28 03:53:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:34,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:34,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:34,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 622 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:34,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:34,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:34,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:35,358 INFO L124 PetriNetUnfolderBase]: 1765/2652 cut-off events. [2024-06-28 03:53:35,358 INFO L125 PetriNetUnfolderBase]: For 12764/12764 co-relation queries the response was YES. [2024-06-28 03:53:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10638 conditions, 2652 events. 1765/2652 cut-off events. For 12764/12764 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11928 event pairs, 620 based on Foata normal form. 2/2652 useless extension candidates. Maximal degree in co-relation 10606. Up to 2568 conditions per place. [2024-06-28 03:53:35,371 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2024-06-28 03:53:35,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 116 transitions, 962 flow [2024-06-28 03:53:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:53:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 03:53:35,377 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 622 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:53:35,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 116 transitions, 962 flow [2024-06-28 03:53:35,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 912 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:35,388 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 640 flow [2024-06-28 03:53:35,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=640, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-28 03:53:35,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-28 03:53:35,388 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 640 flow [2024-06-28 03:53:35,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:35,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:35,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:35,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:53:35,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:35,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash -987947365, now seen corresponding path program 2 times [2024-06-28 03:53:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:35,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854795570] [2024-06-28 03:53:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854795570] [2024-06-28 03:53:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854795570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143427378] [2024-06-28 03:53:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:37,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:37,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 640 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:37,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:37,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:38,433 INFO L124 PetriNetUnfolderBase]: 1778/2673 cut-off events. [2024-06-28 03:53:38,434 INFO L125 PetriNetUnfolderBase]: For 15207/15207 co-relation queries the response was YES. [2024-06-28 03:53:38,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11197 conditions, 2673 events. 1778/2673 cut-off events. For 15207/15207 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12035 event pairs, 595 based on Foata normal form. 2/2673 useless extension candidates. Maximal degree in co-relation 11164. Up to 2498 conditions per place. [2024-06-28 03:53:38,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-28 03:53:38,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 125 transitions, 1067 flow [2024-06-28 03:53:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:53:38,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:53:38,449 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 640 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:53:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 125 transitions, 1067 flow [2024-06-28 03:53:38,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 1014 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:38,460 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 814 flow [2024-06-28 03:53:38,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-28 03:53:38,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-28 03:53:38,461 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 814 flow [2024-06-28 03:53:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:38,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:38,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:38,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:53:38,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:38,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1455532197, now seen corresponding path program 3 times [2024-06-28 03:53:38,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:38,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362793949] [2024-06-28 03:53:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:38,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362793949] [2024-06-28 03:53:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362793949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:40,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:40,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197242915] [2024-06-28 03:53:40,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:40,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:40,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 814 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:40,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:40,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:40,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:41,369 INFO L124 PetriNetUnfolderBase]: 1799/2704 cut-off events. [2024-06-28 03:53:41,369 INFO L125 PetriNetUnfolderBase]: For 18658/18668 co-relation queries the response was YES. [2024-06-28 03:53:41,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12208 conditions, 2704 events. 1799/2704 cut-off events. For 18658/18668 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12185 event pairs, 587 based on Foata normal form. 14/2714 useless extension candidates. Maximal degree in co-relation 12173. Up to 2453 conditions per place. [2024-06-28 03:53:41,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-28 03:53:41,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 1176 flow [2024-06-28 03:53:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:53:41,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 03:53:41,406 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 814 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:53:41,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 1176 flow [2024-06-28 03:53:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1126 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:41,425 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 902 flow [2024-06-28 03:53:41,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-28 03:53:41,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 03:53:41,426 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 902 flow [2024-06-28 03:53:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:41,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:41,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:41,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:53:41,427 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:41,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 739450279, now seen corresponding path program 1 times [2024-06-28 03:53:41,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:41,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2632157] [2024-06-28 03:53:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:41,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:44,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2632157] [2024-06-28 03:53:44,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2632157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:44,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:44,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326822730] [2024-06-28 03:53:44,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:44,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:44,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:44,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:44,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:44,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:44,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:44,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:45,160 INFO L124 PetriNetUnfolderBase]: 1811/2724 cut-off events. [2024-06-28 03:53:45,161 INFO L125 PetriNetUnfolderBase]: For 22153/22163 co-relation queries the response was YES. [2024-06-28 03:53:45,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13044 conditions, 2724 events. 1811/2724 cut-off events. For 22153/22163 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12276 event pairs, 551 based on Foata normal form. 16/2736 useless extension candidates. Maximal degree in co-relation 13007. Up to 2480 conditions per place. [2024-06-28 03:53:45,188 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 43 changer transitions 0/129 dead transitions. [2024-06-28 03:53:45,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1260 flow [2024-06-28 03:53:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:53:45,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:53:45,190 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 902 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:53:45,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1260 flow [2024-06-28 03:53:45,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 1158 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:45,205 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 930 flow [2024-06-28 03:53:45,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-28 03:53:45,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-28 03:53:45,206 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 930 flow [2024-06-28 03:53:45,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:45,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:45,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:53:45,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:45,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash 809720491, now seen corresponding path program 1 times [2024-06-28 03:53:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961879792] [2024-06-28 03:53:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961879792] [2024-06-28 03:53:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961879792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:47,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:47,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566843117] [2024-06-28 03:53:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:47,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:47,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 930 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:47,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:47,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:49,005 INFO L124 PetriNetUnfolderBase]: 1863/2801 cut-off events. [2024-06-28 03:53:49,005 INFO L125 PetriNetUnfolderBase]: For 24873/24886 co-relation queries the response was YES. [2024-06-28 03:53:49,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13804 conditions, 2801 events. 1863/2801 cut-off events. For 24873/24886 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12621 event pairs, 558 based on Foata normal form. 12/2810 useless extension candidates. Maximal degree in co-relation 13766. Up to 2706 conditions per place. [2024-06-28 03:53:49,019 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 123 selfloop transitions, 26 changer transitions 0/152 dead transitions. [2024-06-28 03:53:49,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 152 transitions, 1465 flow [2024-06-28 03:53:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 03:53:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-28 03:53:49,021 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 930 flow. Second operand 9 states and 138 transitions. [2024-06-28 03:53:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 152 transitions, 1465 flow [2024-06-28 03:53:49,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 1351 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:49,038 INFO L231 Difference]: Finished difference. Result has 95 places, 118 transitions, 1058 flow [2024-06-28 03:53:49,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1058, PETRI_PLACES=95, PETRI_TRANSITIONS=118} [2024-06-28 03:53:49,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 03:53:49,040 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 118 transitions, 1058 flow [2024-06-28 03:53:49,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:49,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:49,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:49,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:53:49,041 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1263645474, now seen corresponding path program 1 times [2024-06-28 03:53:49,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:49,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287989852] [2024-06-28 03:53:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287989852] [2024-06-28 03:53:51,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287989852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:51,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:51,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80728069] [2024-06-28 03:53:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:51,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:51,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:51,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 118 transitions, 1058 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:53:51,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:51,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:51,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:52,847 INFO L124 PetriNetUnfolderBase]: 1889/2841 cut-off events. [2024-06-28 03:53:52,847 INFO L125 PetriNetUnfolderBase]: For 28792/28817 co-relation queries the response was YES. [2024-06-28 03:53:52,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 2841 events. 1889/2841 cut-off events. For 28792/28817 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12858 event pairs, 531 based on Foata normal form. 24/2861 useless extension candidates. Maximal degree in co-relation 14358. Up to 2712 conditions per place. [2024-06-28 03:53:52,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2024-06-28 03:53:52,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1476 flow [2024-06-28 03:53:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:53:52,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:53:52,864 INFO L175 Difference]: Start difference. First operand has 95 places, 118 transitions, 1058 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:53:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1476 flow [2024-06-28 03:53:52,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 150 transitions, 1428 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:52,880 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1112 flow [2024-06-28 03:53:52,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1112, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-28 03:53:52,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 03:53:52,881 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1112 flow [2024-06-28 03:53:52,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:53:52,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:52,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:53:52,881 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:52,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1046963631, now seen corresponding path program 2 times [2024-06-28 03:53:52,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:52,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202363707] [2024-06-28 03:53:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:55,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:55,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202363707] [2024-06-28 03:53:55,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202363707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:55,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:55,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614984726] [2024-06-28 03:53:55,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:55,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:55,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:55,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1112 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:55,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:55,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:55,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:56,412 INFO L124 PetriNetUnfolderBase]: 1902/2861 cut-off events. [2024-06-28 03:53:56,413 INFO L125 PetriNetUnfolderBase]: For 32744/32749 co-relation queries the response was YES. [2024-06-28 03:53:56,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15056 conditions, 2861 events. 1902/2861 cut-off events. For 32744/32749 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12969 event pairs, 539 based on Foata normal form. 6/2865 useless extension candidates. Maximal degree in co-relation 15011. Up to 2742 conditions per place. [2024-06-28 03:53:56,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 129 selfloop transitions, 28 changer transitions 0/160 dead transitions. [2024-06-28 03:53:56,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 160 transitions, 1574 flow [2024-06-28 03:53:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:53:56,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:53:56,453 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1112 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:53:56,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 160 transitions, 1574 flow [2024-06-28 03:53:56,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1496 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:56,491 INFO L231 Difference]: Finished difference. Result has 103 places, 124 transitions, 1146 flow [2024-06-28 03:53:56,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1146, PETRI_PLACES=103, PETRI_TRANSITIONS=124} [2024-06-28 03:53:56,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-28 03:53:56,504 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 124 transitions, 1146 flow [2024-06-28 03:53:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:56,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:56,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:56,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:53:56,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:56,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 244380264, now seen corresponding path program 2 times [2024-06-28 03:53:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028882576] [2024-06-28 03:53:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:56,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028882576] [2024-06-28 03:53:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028882576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:58,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706113164] [2024-06-28 03:53:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:58,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:53:58,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 124 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:53:58,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:58,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:53:58,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:59,201 INFO L124 PetriNetUnfolderBase]: 1959/2942 cut-off events. [2024-06-28 03:53:59,201 INFO L125 PetriNetUnfolderBase]: For 38530/38555 co-relation queries the response was YES. [2024-06-28 03:53:59,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 2942 events. 1959/2942 cut-off events. For 38530/38555 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13367 event pairs, 545 based on Foata normal form. 24/2962 useless extension candidates. Maximal degree in co-relation 15898. Up to 2663 conditions per place. [2024-06-28 03:53:59,215 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 42 changer transitions 0/162 dead transitions. [2024-06-28 03:53:59,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1716 flow [2024-06-28 03:53:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:53:59,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 03:53:59,218 INFO L175 Difference]: Start difference. First operand has 103 places, 124 transitions, 1146 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:53:59,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1716 flow [2024-06-28 03:53:59,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1628 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:59,247 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1279 flow [2024-06-28 03:53:59,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1279, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-28 03:53:59,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 03:53:59,248 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1279 flow [2024-06-28 03:53:59,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:53:59,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:59,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:53:59,249 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:59,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1043244561, now seen corresponding path program 3 times [2024-06-28 03:53:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384982052] [2024-06-28 03:53:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:01,561 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 03:54:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384982052] [2024-06-28 03:54:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384982052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271319559] [2024-06-28 03:54:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:01,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:01,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:01,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:01,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1279 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:01,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:01,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:01,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:02,617 INFO L124 PetriNetUnfolderBase]: 1972/2966 cut-off events. [2024-06-28 03:54:02,617 INFO L125 PetriNetUnfolderBase]: For 43469/43473 co-relation queries the response was YES. [2024-06-28 03:54:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16758 conditions, 2966 events. 1972/2966 cut-off events. For 43469/43473 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13527 event pairs, 574 based on Foata normal form. 2/2966 useless extension candidates. Maximal degree in co-relation 16710. Up to 2722 conditions per place. [2024-06-28 03:54:02,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 114 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-28 03:54:02,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 168 transitions, 1751 flow [2024-06-28 03:54:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:54:02,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:54:02,666 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1279 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:54:02,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 168 transitions, 1751 flow [2024-06-28 03:54:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 168 transitions, 1694 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-28 03:54:02,689 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1388 flow [2024-06-28 03:54:02,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1388, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-06-28 03:54:02,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 03:54:02,690 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1388 flow [2024-06-28 03:54:02,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:02,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:02,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:54:02,690 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:02,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash 838969190, now seen corresponding path program 3 times [2024-06-28 03:54:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:02,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627123891] [2024-06-28 03:54:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:04,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627123891] [2024-06-28 03:54:04,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627123891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:04,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:04,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:54:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000209530] [2024-06-28 03:54:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:04,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:54:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:54:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:54:04,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:04,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1388 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:54:04,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:04,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:04,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:05,447 INFO L124 PetriNetUnfolderBase]: 1962/2948 cut-off events. [2024-06-28 03:54:05,448 INFO L125 PetriNetUnfolderBase]: For 48029/48054 co-relation queries the response was YES. [2024-06-28 03:54:05,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 2948 events. 1962/2948 cut-off events. For 48029/48054 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13417 event pairs, 543 based on Foata normal form. 24/2968 useless extension candidates. Maximal degree in co-relation 17171. Up to 2764 conditions per place. [2024-06-28 03:54:05,466 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 39 changer transitions 0/162 dead transitions. [2024-06-28 03:54:05,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 162 transitions, 1786 flow [2024-06-28 03:54:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:54:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:54:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:54:05,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 03:54:05,469 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1388 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:54:05,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 162 transitions, 1786 flow [2024-06-28 03:54:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1620 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:05,501 INFO L231 Difference]: Finished difference. Result has 112 places, 136 transitions, 1308 flow [2024-06-28 03:54:05,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=112, PETRI_TRANSITIONS=136} [2024-06-28 03:54:05,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-28 03:54:05,502 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 136 transitions, 1308 flow [2024-06-28 03:54:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 03:54:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:54:05,502 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1440489933, now seen corresponding path program 4 times [2024-06-28 03:54:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244566470] [2024-06-28 03:54:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244566470] [2024-06-28 03:54:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244566470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:08,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523976610] [2024-06-28 03:54:08,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:08,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:08,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:08,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:08,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 136 transitions, 1308 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:08,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:08,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:08,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:09,487 INFO L124 PetriNetUnfolderBase]: 2001/3005 cut-off events. [2024-06-28 03:54:09,487 INFO L125 PetriNetUnfolderBase]: For 52155/52180 co-relation queries the response was YES. [2024-06-28 03:54:09,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17617 conditions, 3005 events. 2001/3005 cut-off events. For 52155/52180 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13686 event pairs, 543 based on Foata normal form. 26/3027 useless extension candidates. Maximal degree in co-relation 17566. Up to 2696 conditions per place. [2024-06-28 03:54:09,504 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 52 changer transitions 0/171 dead transitions. [2024-06-28 03:54:09,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 171 transitions, 1804 flow [2024-06-28 03:54:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:54:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 03:54:09,506 INFO L175 Difference]: Start difference. First operand has 112 places, 136 transitions, 1308 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:54:09,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 171 transitions, 1804 flow [2024-06-28 03:54:09,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 171 transitions, 1705 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:09,538 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1397 flow [2024-06-28 03:54:09,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1397, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-28 03:54:09,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 03:54:09,538 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1397 flow [2024-06-28 03:54:09,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:09,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:09,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:09,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:54:09,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:09,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1471612975, now seen corresponding path program 5 times [2024-06-28 03:54:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:09,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215674353] [2024-06-28 03:54:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:11,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:11,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215674353] [2024-06-28 03:54:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215674353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:11,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513557776] [2024-06-28 03:54:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:11,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:11,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:11,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1397 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:11,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:11,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:12,605 INFO L124 PetriNetUnfolderBase]: 2160/3245 cut-off events. [2024-06-28 03:54:12,606 INFO L125 PetriNetUnfolderBase]: For 58743/58761 co-relation queries the response was YES. [2024-06-28 03:54:12,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19559 conditions, 3245 events. 2160/3245 cut-off events. For 58743/58761 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14992 event pairs, 583 based on Foata normal form. 16/3259 useless extension candidates. Maximal degree in co-relation 19507. Up to 2885 conditions per place. [2024-06-28 03:54:12,625 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 137 selfloop transitions, 79 changer transitions 0/219 dead transitions. [2024-06-28 03:54:12,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 219 transitions, 2300 flow [2024-06-28 03:54:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:54:12,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:54:12,628 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1397 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:54:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 219 transitions, 2300 flow [2024-06-28 03:54:12,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 219 transitions, 2070 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:12,671 INFO L231 Difference]: Finished difference. Result has 120 places, 175 transitions, 1789 flow [2024-06-28 03:54:12,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=120, PETRI_TRANSITIONS=175} [2024-06-28 03:54:12,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-28 03:54:12,671 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 175 transitions, 1789 flow [2024-06-28 03:54:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:12,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:12,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:54:12,672 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:12,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash -404418513, now seen corresponding path program 6 times [2024-06-28 03:54:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21156124] [2024-06-28 03:54:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21156124] [2024-06-28 03:54:14,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21156124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:14,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:14,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:14,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027258642] [2024-06-28 03:54:14,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:14,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:14,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:14,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 175 transitions, 1789 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:14,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:14,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:14,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:15,787 INFO L124 PetriNetUnfolderBase]: 2299/3456 cut-off events. [2024-06-28 03:54:15,787 INFO L125 PetriNetUnfolderBase]: For 66379/66417 co-relation queries the response was YES. [2024-06-28 03:54:15,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21314 conditions, 3456 events. 2299/3456 cut-off events. For 66379/66417 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16163 event pairs, 564 based on Foata normal form. 32/3486 useless extension candidates. Maximal degree in co-relation 21259. Up to 2825 conditions per place. [2024-06-28 03:54:15,808 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 117 selfloop transitions, 147 changer transitions 0/267 dead transitions. [2024-06-28 03:54:15,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 267 transitions, 3124 flow [2024-06-28 03:54:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:54:15,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 03:54:15,810 INFO L175 Difference]: Start difference. First operand has 120 places, 175 transitions, 1789 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:54:15,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 267 transitions, 3124 flow [2024-06-28 03:54:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 267 transitions, 2853 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:15,866 INFO L231 Difference]: Finished difference. Result has 126 places, 217 transitions, 2459 flow [2024-06-28 03:54:15,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2459, PETRI_PLACES=126, PETRI_TRANSITIONS=217} [2024-06-28 03:54:15,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 03:54:15,867 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 217 transitions, 2459 flow [2024-06-28 03:54:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:15,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:15,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:54:15,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:15,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1658190867, now seen corresponding path program 7 times [2024-06-28 03:54:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:15,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565960066] [2024-06-28 03:54:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:17,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:17,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565960066] [2024-06-28 03:54:17,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565960066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:17,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:17,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:17,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877501782] [2024-06-28 03:54:17,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:17,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:17,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:17,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:17,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 217 transitions, 2459 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:17,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:17,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:17,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:18,987 INFO L124 PetriNetUnfolderBase]: 2462/3704 cut-off events. [2024-06-28 03:54:18,987 INFO L125 PetriNetUnfolderBase]: For 74277/74305 co-relation queries the response was YES. [2024-06-28 03:54:19,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23703 conditions, 3704 events. 2462/3704 cut-off events. For 74277/74305 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17640 event pairs, 575 based on Foata normal form. 25/3727 useless extension candidates. Maximal degree in co-relation 23645. Up to 3184 conditions per place. [2024-06-28 03:54:19,014 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 177 selfloop transitions, 133 changer transitions 0/313 dead transitions. [2024-06-28 03:54:19,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 313 transitions, 3827 flow [2024-06-28 03:54:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:54:19,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:54:19,017 INFO L175 Difference]: Start difference. First operand has 126 places, 217 transitions, 2459 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:54:19,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 313 transitions, 3827 flow [2024-06-28 03:54:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 313 transitions, 3533 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-28 03:54:19,134 INFO L231 Difference]: Finished difference. Result has 133 places, 268 transitions, 3198 flow [2024-06-28 03:54:19,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3198, PETRI_PLACES=133, PETRI_TRANSITIONS=268} [2024-06-28 03:54:19,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-28 03:54:19,134 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 268 transitions, 3198 flow [2024-06-28 03:54:19,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:19,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:19,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:19,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:54:19,135 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:19,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1132297364, now seen corresponding path program 1 times [2024-06-28 03:54:19,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:19,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747288092] [2024-06-28 03:54:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:21,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:21,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747288092] [2024-06-28 03:54:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747288092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:21,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562474503] [2024-06-28 03:54:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:21,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:21,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 268 transitions, 3198 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:21,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:21,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:21,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:23,131 INFO L124 PetriNetUnfolderBase]: 2634/3984 cut-off events. [2024-06-28 03:54:23,131 INFO L125 PetriNetUnfolderBase]: For 89204/89224 co-relation queries the response was YES. [2024-06-28 03:54:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26952 conditions, 3984 events. 2634/3984 cut-off events. For 89204/89224 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19452 event pairs, 450 based on Foata normal form. 18/4000 useless extension candidates. Maximal degree in co-relation 26890. Up to 2765 conditions per place. [2024-06-28 03:54:23,160 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 194 changer transitions 0/324 dead transitions. [2024-06-28 03:54:23,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 324 transitions, 4238 flow [2024-06-28 03:54:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:54:23,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:54:23,162 INFO L175 Difference]: Start difference. First operand has 133 places, 268 transitions, 3198 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:54:23,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 324 transitions, 4238 flow [2024-06-28 03:54:23,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 324 transitions, 4045 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 03:54:23,266 INFO L231 Difference]: Finished difference. Result has 138 places, 272 transitions, 3520 flow [2024-06-28 03:54:23,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3520, PETRI_PLACES=138, PETRI_TRANSITIONS=272} [2024-06-28 03:54:23,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 03:54:23,267 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 272 transitions, 3520 flow [2024-06-28 03:54:23,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:23,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:23,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:54:23,268 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:23,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1132236790, now seen corresponding path program 1 times [2024-06-28 03:54:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:23,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423010010] [2024-06-28 03:54:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:25,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423010010] [2024-06-28 03:54:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423010010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:25,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:25,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431037297] [2024-06-28 03:54:25,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:25,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:25,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 272 transitions, 3520 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:25,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:25,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:25,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:27,151 INFO L124 PetriNetUnfolderBase]: 2696/4072 cut-off events. [2024-06-28 03:54:27,151 INFO L125 PetriNetUnfolderBase]: For 101321/101359 co-relation queries the response was YES. [2024-06-28 03:54:27,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 4072 events. 2696/4072 cut-off events. For 101321/101359 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19970 event pairs, 595 based on Foata normal form. 32/4100 useless extension candidates. Maximal degree in co-relation 28429. Up to 3064 conditions per place. [2024-06-28 03:54:27,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 186 changer transitions 0/323 dead transitions. [2024-06-28 03:54:27,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 323 transitions, 4682 flow [2024-06-28 03:54:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:54:27,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:54:27,189 INFO L175 Difference]: Start difference. First operand has 138 places, 272 transitions, 3520 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:54:27,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 323 transitions, 4682 flow [2024-06-28 03:54:27,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 323 transitions, 4399 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:27,361 INFO L231 Difference]: Finished difference. Result has 142 places, 281 transitions, 3894 flow [2024-06-28 03:54:27,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3894, PETRI_PLACES=142, PETRI_TRANSITIONS=281} [2024-06-28 03:54:27,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-28 03:54:27,363 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 281 transitions, 3894 flow [2024-06-28 03:54:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:27,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:27,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:27,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:54:27,363 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:27,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash -671147766, now seen corresponding path program 2 times [2024-06-28 03:54:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:27,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368799225] [2024-06-28 03:54:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:27,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:30,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:30,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368799225] [2024-06-28 03:54:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368799225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973243882] [2024-06-28 03:54:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:30,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:30,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:30,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 281 transitions, 3894 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:30,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:30,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:31,691 INFO L124 PetriNetUnfolderBase]: 2716/4102 cut-off events. [2024-06-28 03:54:31,691 INFO L125 PetriNetUnfolderBase]: For 110182/110202 co-relation queries the response was YES. [2024-06-28 03:54:31,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30165 conditions, 4102 events. 2716/4102 cut-off events. For 110182/110202 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20128 event pairs, 553 based on Foata normal form. 18/4118 useless extension candidates. Maximal degree in co-relation 30099. Up to 3281 conditions per place. [2024-06-28 03:54:31,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 126 selfloop transitions, 200 changer transitions 0/329 dead transitions. [2024-06-28 03:54:31,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 329 transitions, 4762 flow [2024-06-28 03:54:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:54:31,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:54:31,729 INFO L175 Difference]: Start difference. First operand has 142 places, 281 transitions, 3894 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:54:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 329 transitions, 4762 flow [2024-06-28 03:54:31,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 329 transitions, 4610 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 03:54:31,990 INFO L231 Difference]: Finished difference. Result has 148 places, 283 transitions, 4225 flow [2024-06-28 03:54:31,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4225, PETRI_PLACES=148, PETRI_TRANSITIONS=283} [2024-06-28 03:54:31,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 03:54:31,991 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 283 transitions, 4225 flow [2024-06-28 03:54:31,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:31,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:31,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:31,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:54:31,992 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:31,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1018613110, now seen corresponding path program 2 times [2024-06-28 03:54:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35455529] [2024-06-28 03:54:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:35,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35455529] [2024-06-28 03:54:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35455529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:35,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:35,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:35,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424881519] [2024-06-28 03:54:35,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:35,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:35,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:35,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:35,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 283 transitions, 4225 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:35,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:35,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:35,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:36,455 INFO L124 PetriNetUnfolderBase]: 2742/4143 cut-off events. [2024-06-28 03:54:36,456 INFO L125 PetriNetUnfolderBase]: For 121076/121098 co-relation queries the response was YES. [2024-06-28 03:54:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31417 conditions, 4143 events. 2742/4143 cut-off events. For 121076/121098 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20381 event pairs, 570 based on Foata normal form. 22/4161 useless extension candidates. Maximal degree in co-relation 31349. Up to 3925 conditions per place. [2024-06-28 03:54:36,490 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 42 changer transitions 0/321 dead transitions. [2024-06-28 03:54:36,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 321 transitions, 5056 flow [2024-06-28 03:54:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:54:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:54:36,492 INFO L175 Difference]: Start difference. First operand has 148 places, 283 transitions, 4225 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:54:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 321 transitions, 5056 flow [2024-06-28 03:54:36,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 321 transitions, 4619 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:36,739 INFO L231 Difference]: Finished difference. Result has 149 places, 286 transitions, 3956 flow [2024-06-28 03:54:36,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3956, PETRI_PLACES=149, PETRI_TRANSITIONS=286} [2024-06-28 03:54:36,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 03:54:36,744 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 286 transitions, 3956 flow [2024-06-28 03:54:36,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:36,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:36,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:36,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:54:36,745 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:36,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -668351132, now seen corresponding path program 3 times [2024-06-28 03:54:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:36,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014763833] [2024-06-28 03:54:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014763833] [2024-06-28 03:54:39,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014763833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:39,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:39,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:39,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162893639] [2024-06-28 03:54:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:39,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:39,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:39,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 286 transitions, 3956 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:39,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:39,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:39,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:40,877 INFO L124 PetriNetUnfolderBase]: 2732/4129 cut-off events. [2024-06-28 03:54:40,877 INFO L125 PetriNetUnfolderBase]: For 124444/124466 co-relation queries the response was YES. [2024-06-28 03:54:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30930 conditions, 4129 events. 2732/4129 cut-off events. For 124444/124466 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20314 event pairs, 568 based on Foata normal form. 22/4147 useless extension candidates. Maximal degree in co-relation 30861. Up to 3878 conditions per place. [2024-06-28 03:54:40,985 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 48 changer transitions 0/329 dead transitions. [2024-06-28 03:54:40,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 329 transitions, 4827 flow [2024-06-28 03:54:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:54:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:54:40,987 INFO L175 Difference]: Start difference. First operand has 149 places, 286 transitions, 3956 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:54:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 329 transitions, 4827 flow [2024-06-28 03:54:41,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 329 transitions, 4683 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:41,169 INFO L231 Difference]: Finished difference. Result has 152 places, 289 transitions, 4002 flow [2024-06-28 03:54:41,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4002, PETRI_PLACES=152, PETRI_TRANSITIONS=289} [2024-06-28 03:54:41,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-28 03:54:41,172 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 289 transitions, 4002 flow [2024-06-28 03:54:41,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:41,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:41,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:54:41,172 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:41,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -668351256, now seen corresponding path program 3 times [2024-06-28 03:54:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465578758] [2024-06-28 03:54:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465578758] [2024-06-28 03:54:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465578758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:44,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:44,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:44,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326242986] [2024-06-28 03:54:44,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:44,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 289 transitions, 4002 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:45,952 INFO L124 PetriNetUnfolderBase]: 2724/4116 cut-off events. [2024-06-28 03:54:45,952 INFO L125 PetriNetUnfolderBase]: For 129854/129866 co-relation queries the response was YES. [2024-06-28 03:54:45,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 4116 events. 2724/4116 cut-off events. For 129854/129866 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20205 event pairs, 586 based on Foata normal form. 16/4130 useless extension candidates. Maximal degree in co-relation 31052. Up to 3916 conditions per place. [2024-06-28 03:54:45,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 43 changer transitions 0/333 dead transitions. [2024-06-28 03:54:45,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 333 transitions, 4875 flow [2024-06-28 03:54:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 03:54:45,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 03:54:45,989 INFO L175 Difference]: Start difference. First operand has 152 places, 289 transitions, 4002 flow. Second operand 9 states and 145 transitions. [2024-06-28 03:54:45,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 333 transitions, 4875 flow [2024-06-28 03:54:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 333 transitions, 4711 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:46,219 INFO L231 Difference]: Finished difference. Result has 154 places, 291 transitions, 4003 flow [2024-06-28 03:54:46,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4003, PETRI_PLACES=154, PETRI_TRANSITIONS=291} [2024-06-28 03:54:46,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:54:46,220 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 291 transitions, 4003 flow [2024-06-28 03:54:46,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:46,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:46,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:54:46,221 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:46,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash -402831236, now seen corresponding path program 1 times [2024-06-28 03:54:46,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:46,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280122754] [2024-06-28 03:54:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280122754] [2024-06-28 03:54:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280122754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:48,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:48,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280678419] [2024-06-28 03:54:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:48,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 291 transitions, 4003 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:48,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:48,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:50,019 INFO L124 PetriNetUnfolderBase]: 2719/4112 cut-off events. [2024-06-28 03:54:50,019 INFO L125 PetriNetUnfolderBase]: For 126465/126487 co-relation queries the response was YES. [2024-06-28 03:54:50,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30633 conditions, 4112 events. 2719/4112 cut-off events. For 126465/126487 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20193 event pairs, 576 based on Foata normal form. 20/4128 useless extension candidates. Maximal degree in co-relation 30562. Up to 3842 conditions per place. [2024-06-28 03:54:50,062 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2024-06-28 03:54:50,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 316 transitions, 4719 flow [2024-06-28 03:54:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:54:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:54:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:54:50,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:54:50,064 INFO L175 Difference]: Start difference. First operand has 154 places, 291 transitions, 4003 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:54:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 316 transitions, 4719 flow [2024-06-28 03:54:50,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 316 transitions, 4546 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:50,335 INFO L231 Difference]: Finished difference. Result has 154 places, 291 transitions, 3942 flow [2024-06-28 03:54:50,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3942, PETRI_PLACES=154, PETRI_TRANSITIONS=291} [2024-06-28 03:54:50,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:54:50,336 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 291 transitions, 3942 flow [2024-06-28 03:54:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:50,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:50,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:54:50,337 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:50,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2021362674, now seen corresponding path program 4 times [2024-06-28 03:54:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:50,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921570152] [2024-06-28 03:54:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:50,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:52,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921570152] [2024-06-28 03:54:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921570152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:52,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:52,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:52,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71287747] [2024-06-28 03:54:52,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:52,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:52,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:52,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 291 transitions, 3942 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:52,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:52,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:52,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:54,356 INFO L124 PetriNetUnfolderBase]: 2980/4488 cut-off events. [2024-06-28 03:54:54,356 INFO L125 PetriNetUnfolderBase]: For 150420/150446 co-relation queries the response was YES. [2024-06-28 03:54:54,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33935 conditions, 4488 events. 2980/4488 cut-off events. For 150420/150446 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 22283 event pairs, 546 based on Foata normal form. 24/4508 useless extension candidates. Maximal degree in co-relation 33863. Up to 3733 conditions per place. [2024-06-28 03:54:54,400 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 245 selfloop transitions, 107 changer transitions 0/355 dead transitions. [2024-06-28 03:54:54,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 355 transitions, 5223 flow [2024-06-28 03:54:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:54:54,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:54:54,401 INFO L175 Difference]: Start difference. First operand has 154 places, 291 transitions, 3942 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:54:54,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 355 transitions, 5223 flow [2024-06-28 03:54:54,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 355 transitions, 5026 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:54,674 INFO L231 Difference]: Finished difference. Result has 157 places, 310 transitions, 4361 flow [2024-06-28 03:54:54,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3757, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4361, PETRI_PLACES=157, PETRI_TRANSITIONS=310} [2024-06-28 03:54:54,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 03:54:54,675 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 310 transitions, 4361 flow [2024-06-28 03:54:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:54,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:54,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:54:54,675 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:54,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -553059962, now seen corresponding path program 5 times [2024-06-28 03:54:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:54,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675936375] [2024-06-28 03:54:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:56,898 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 03:54:56,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675936375] [2024-06-28 03:54:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675936375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:56,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:56,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:56,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838483843] [2024-06-28 03:54:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:56,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:56,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:56,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:56,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:54:56,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 310 transitions, 4361 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:56,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:56,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:54:56,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:58,290 INFO L124 PetriNetUnfolderBase]: 3006/4530 cut-off events. [2024-06-28 03:54:58,290 INFO L125 PetriNetUnfolderBase]: For 154799/154827 co-relation queries the response was YES. [2024-06-28 03:54:58,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36031 conditions, 4530 events. 3006/4530 cut-off events. For 154799/154827 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22526 event pairs, 630 based on Foata normal form. 26/4552 useless extension candidates. Maximal degree in co-relation 35958. Up to 3801 conditions per place. [2024-06-28 03:54:58,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 229 selfloop transitions, 124 changer transitions 0/356 dead transitions. [2024-06-28 03:54:58,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 356 transitions, 5419 flow [2024-06-28 03:54:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:54:58,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 03:54:58,332 INFO L175 Difference]: Start difference. First operand has 157 places, 310 transitions, 4361 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:54:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 356 transitions, 5419 flow [2024-06-28 03:54:58,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 356 transitions, 5300 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:58,630 INFO L231 Difference]: Finished difference. Result has 161 places, 313 transitions, 4575 flow [2024-06-28 03:54:58,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4575, PETRI_PLACES=161, PETRI_TRANSITIONS=313} [2024-06-28 03:54:58,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 03:54:58,631 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 313 transitions, 4575 flow [2024-06-28 03:54:58,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:58,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:58,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:58,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:54:58,632 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:58,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2019163730, now seen corresponding path program 6 times [2024-06-28 03:54:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:58,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382371897] [2024-06-28 03:54:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:00,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382371897] [2024-06-28 03:55:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382371897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:00,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:00,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:55:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818310490] [2024-06-28 03:55:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:55:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:55:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:55:00,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:00,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 313 transitions, 4575 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:00,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:00,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:00,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:02,009 INFO L124 PetriNetUnfolderBase]: 2996/4519 cut-off events. [2024-06-28 03:55:02,010 INFO L125 PetriNetUnfolderBase]: For 161640/161668 co-relation queries the response was YES. [2024-06-28 03:55:02,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36453 conditions, 4519 events. 2996/4519 cut-off events. For 161640/161668 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22465 event pairs, 657 based on Foata normal form. 26/4541 useless extension candidates. Maximal degree in co-relation 36378. Up to 4047 conditions per place. [2024-06-28 03:55:02,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 89 changer transitions 0/347 dead transitions. [2024-06-28 03:55:02,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 347 transitions, 5398 flow [2024-06-28 03:55:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:55:02,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:55:02,052 INFO L175 Difference]: Start difference. First operand has 161 places, 313 transitions, 4575 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:55:02,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 347 transitions, 5398 flow [2024-06-28 03:55:02,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 347 transitions, 5024 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:02,325 INFO L231 Difference]: Finished difference. Result has 162 places, 313 transitions, 4388 flow [2024-06-28 03:55:02,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4388, PETRI_PLACES=162, PETRI_TRANSITIONS=313} [2024-06-28 03:55:02,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-28 03:55:02,325 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 313 transitions, 4388 flow [2024-06-28 03:55:02,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:02,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:02,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:55:02,326 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:02,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158956, now seen corresponding path program 4 times [2024-06-28 03:55:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:02,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839017445] [2024-06-28 03:55:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:02,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:05,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:05,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839017445] [2024-06-28 03:55:05,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839017445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:05,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103906430] [2024-06-28 03:55:05,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:05,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:05,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:05,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 313 transitions, 4388 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:06,849 INFO L124 PetriNetUnfolderBase]: 3016/4548 cut-off events. [2024-06-28 03:55:06,849 INFO L125 PetriNetUnfolderBase]: For 167293/167311 co-relation queries the response was YES. [2024-06-28 03:55:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36444 conditions, 4548 events. 3016/4548 cut-off events. For 167293/167311 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22650 event pairs, 657 based on Foata normal form. 18/4564 useless extension candidates. Maximal degree in co-relation 36369. Up to 4192 conditions per place. [2024-06-28 03:55:06,894 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 273 selfloop transitions, 77 changer transitions 0/353 dead transitions. [2024-06-28 03:55:06,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 353 transitions, 5279 flow [2024-06-28 03:55:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:55:06,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 03:55:06,901 INFO L175 Difference]: Start difference. First operand has 162 places, 313 transitions, 4388 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:55:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 353 transitions, 5279 flow [2024-06-28 03:55:07,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 353 transitions, 5027 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:07,210 INFO L231 Difference]: Finished difference. Result has 164 places, 315 transitions, 4370 flow [2024-06-28 03:55:07,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4370, PETRI_PLACES=164, PETRI_TRANSITIONS=315} [2024-06-28 03:55:07,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 03:55:07,210 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 315 transitions, 4370 flow [2024-06-28 03:55:07,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:07,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:07,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:55:07,211 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:07,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1872673746, now seen corresponding path program 5 times [2024-06-28 03:55:07,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:07,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547348307] [2024-06-28 03:55:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:09,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:09,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547348307] [2024-06-28 03:55:09,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547348307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:09,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:09,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:09,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057256466] [2024-06-28 03:55:09,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:09,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:09,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:09,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 315 transitions, 4370 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:09,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:09,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:11,125 INFO L124 PetriNetUnfolderBase]: 2972/4481 cut-off events. [2024-06-28 03:55:11,125 INFO L125 PetriNetUnfolderBase]: For 173451/173479 co-relation queries the response was YES. [2024-06-28 03:55:11,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35270 conditions, 4481 events. 2972/4481 cut-off events. For 173451/173479 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22197 event pairs, 622 based on Foata normal form. 46/4523 useless extension candidates. Maximal degree in co-relation 35194. Up to 3822 conditions per place. [2024-06-28 03:55:11,167 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 88 changer transitions 0/366 dead transitions. [2024-06-28 03:55:11,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 366 transitions, 5306 flow [2024-06-28 03:55:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:55:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:55:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 03:55:11,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-28 03:55:11,170 INFO L175 Difference]: Start difference. First operand has 164 places, 315 transitions, 4370 flow. Second operand 11 states and 178 transitions. [2024-06-28 03:55:11,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 366 transitions, 5306 flow [2024-06-28 03:55:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 366 transitions, 5090 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:11,485 INFO L231 Difference]: Finished difference. Result has 168 places, 315 transitions, 4344 flow [2024-06-28 03:55:11,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4344, PETRI_PLACES=168, PETRI_TRANSITIONS=315} [2024-06-28 03:55:11,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 03:55:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 315 transitions, 4344 flow [2024-06-28 03:55:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:11,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:11,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:55:11,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:11,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1942173670, now seen corresponding path program 1 times [2024-06-28 03:55:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:11,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066785096] [2024-06-28 03:55:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:11,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:13,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066785096] [2024-06-28 03:55:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066785096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:13,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:13,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:55:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188641721] [2024-06-28 03:55:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:55:13,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:55:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:55:13,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:13,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 315 transitions, 4344 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:13,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:13,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:13,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:15,236 INFO L124 PetriNetUnfolderBase]: 2992/4510 cut-off events. [2024-06-28 03:55:15,236 INFO L125 PetriNetUnfolderBase]: For 169345/169373 co-relation queries the response was YES. [2024-06-28 03:55:15,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35584 conditions, 4510 events. 2992/4510 cut-off events. For 169345/169373 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22415 event pairs, 592 based on Foata normal form. 26/4532 useless extension candidates. Maximal degree in co-relation 35507. Up to 4170 conditions per place. [2024-06-28 03:55:15,277 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 301 selfloop transitions, 43 changer transitions 0/347 dead transitions. [2024-06-28 03:55:15,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 347 transitions, 5368 flow [2024-06-28 03:55:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:55:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:55:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:55:15,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:55:15,279 INFO L175 Difference]: Start difference. First operand has 168 places, 315 transitions, 4344 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:55:15,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 347 transitions, 5368 flow [2024-06-28 03:55:15,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 347 transitions, 5084 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-28 03:55:15,566 INFO L231 Difference]: Finished difference. Result has 163 places, 319 transitions, 4267 flow [2024-06-28 03:55:15,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4267, PETRI_PLACES=163, PETRI_TRANSITIONS=319} [2024-06-28 03:55:15,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-28 03:55:15,566 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 319 transitions, 4267 flow [2024-06-28 03:55:15,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:15,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:15,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:55:15,567 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:15,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1881891060, now seen corresponding path program 2 times [2024-06-28 03:55:15,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586708138] [2024-06-28 03:55:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:18,287 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 03:55:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586708138] [2024-06-28 03:55:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586708138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:18,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:55:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809123511] [2024-06-28 03:55:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:18,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:55:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:55:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:55:18,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:18,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 319 transitions, 4267 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:18,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:18,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:18,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:19,821 INFO L124 PetriNetUnfolderBase]: 2984/4501 cut-off events. [2024-06-28 03:55:19,821 INFO L125 PetriNetUnfolderBase]: For 173889/173917 co-relation queries the response was YES. [2024-06-28 03:55:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35129 conditions, 4501 events. 2984/4501 cut-off events. For 173889/173917 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22340 event pairs, 661 based on Foata normal form. 26/4523 useless extension candidates. Maximal degree in co-relation 35052. Up to 4236 conditions per place. [2024-06-28 03:55:19,863 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 43 changer transitions 0/344 dead transitions. [2024-06-28 03:55:19,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 5035 flow [2024-06-28 03:55:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:55:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:55:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:55:19,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:55:19,865 INFO L175 Difference]: Start difference. First operand has 163 places, 319 transitions, 4267 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:55:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 5035 flow [2024-06-28 03:55:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 344 transitions, 4902 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-28 03:55:20,224 INFO L231 Difference]: Finished difference. Result has 167 places, 319 transitions, 4228 flow [2024-06-28 03:55:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4228, PETRI_PLACES=167, PETRI_TRANSITIONS=319} [2024-06-28 03:55:20,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-28 03:55:20,225 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 319 transitions, 4228 flow [2024-06-28 03:55:20,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:20,225 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 03:55:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:55:20,226 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:20,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1198204435, now seen corresponding path program 1 times [2024-06-28 03:55:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735528473] [2024-06-28 03:55:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:22,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735528473] [2024-06-28 03:55:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735528473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416769297] [2024-06-28 03:55:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:22,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:22,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 319 transitions, 4228 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:22,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:22,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:22,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:24,560 INFO L124 PetriNetUnfolderBase]: 3176/4819 cut-off events. [2024-06-28 03:55:24,561 INFO L125 PetriNetUnfolderBase]: For 210158/210202 co-relation queries the response was YES. [2024-06-28 03:55:24,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38201 conditions, 4819 events. 3176/4819 cut-off events. For 210158/210202 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 24649 event pairs, 566 based on Foata normal form. 48/4863 useless extension candidates. Maximal degree in co-relation 38122. Up to 2942 conditions per place. [2024-06-28 03:55:24,600 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 186 changer transitions 0/375 dead transitions. [2024-06-28 03:55:24,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 375 transitions, 5437 flow [2024-06-28 03:55:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:55:24,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:55:24,602 INFO L175 Difference]: Start difference. First operand has 167 places, 319 transitions, 4228 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:55:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 375 transitions, 5437 flow [2024-06-28 03:55:24,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 375 transitions, 5343 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:55:24,909 INFO L231 Difference]: Finished difference. Result has 170 places, 321 transitions, 4606 flow [2024-06-28 03:55:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4606, PETRI_PLACES=170, PETRI_TRANSITIONS=321} [2024-06-28 03:55:24,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 03:55:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 321 transitions, 4606 flow [2024-06-28 03:55:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:24,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:24,910 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 03:55:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:55:24,910 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 519504807, now seen corresponding path program 2 times [2024-06-28 03:55:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:24,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804203676] [2024-06-28 03:55:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:24,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:27,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804203676] [2024-06-28 03:55:27,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804203676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:27,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:27,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:27,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761574302] [2024-06-28 03:55:27,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:27,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:27,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:27,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:27,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:27,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 321 transitions, 4606 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:27,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:27,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:29,098 INFO L124 PetriNetUnfolderBase]: 3264/4963 cut-off events. [2024-06-28 03:55:29,099 INFO L125 PetriNetUnfolderBase]: For 228099/228143 co-relation queries the response was YES. [2024-06-28 03:55:29,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40214 conditions, 4963 events. 3264/4963 cut-off events. For 228099/228143 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25643 event pairs, 718 based on Foata normal form. 52/5011 useless extension candidates. Maximal degree in co-relation 40134. Up to 3788 conditions per place. [2024-06-28 03:55:29,140 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 201 changer transitions 0/371 dead transitions. [2024-06-28 03:55:29,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 371 transitions, 5601 flow [2024-06-28 03:55:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:55:29,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:55:29,142 INFO L175 Difference]: Start difference. First operand has 170 places, 321 transitions, 4606 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:55:29,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 371 transitions, 5601 flow [2024-06-28 03:55:29,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 371 transitions, 5351 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:29,506 INFO L231 Difference]: Finished difference. Result has 174 places, 322 transitions, 4815 flow [2024-06-28 03:55:29,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4815, PETRI_PLACES=174, PETRI_TRANSITIONS=322} [2024-06-28 03:55:29,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-28 03:55:29,517 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 322 transitions, 4815 flow [2024-06-28 03:55:29,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:29,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:29,517 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 03:55:29,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:55:29,517 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:29,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash 669257837, now seen corresponding path program 3 times [2024-06-28 03:55:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:29,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251731529] [2024-06-28 03:55:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:29,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251731529] [2024-06-28 03:55:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251731529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:31,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:31,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739952300] [2024-06-28 03:55:31,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:31,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:31,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:31,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:31,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:31,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 322 transitions, 4815 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:31,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:31,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:31,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:33,561 INFO L124 PetriNetUnfolderBase]: 3332/5076 cut-off events. [2024-06-28 03:55:33,561 INFO L125 PetriNetUnfolderBase]: For 237879/237911 co-relation queries the response was YES. [2024-06-28 03:55:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41693 conditions, 5076 events. 3332/5076 cut-off events. For 237879/237911 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26482 event pairs, 699 based on Foata normal form. 40/5112 useless extension candidates. Maximal degree in co-relation 41611. Up to 4357 conditions per place. [2024-06-28 03:55:33,606 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 97 changer transitions 0/376 dead transitions. [2024-06-28 03:55:33,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 376 transitions, 5846 flow [2024-06-28 03:55:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:55:33,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 03:55:33,626 INFO L175 Difference]: Start difference. First operand has 174 places, 322 transitions, 4815 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:55:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 376 transitions, 5846 flow [2024-06-28 03:55:33,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 376 transitions, 5433 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:34,003 INFO L231 Difference]: Finished difference. Result has 176 places, 323 transitions, 4652 flow [2024-06-28 03:55:34,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4652, PETRI_PLACES=176, PETRI_TRANSITIONS=323} [2024-06-28 03:55:34,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-28 03:55:34,003 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 323 transitions, 4652 flow [2024-06-28 03:55:34,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:34,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:34,004 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 03:55:34,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:55:34,004 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:34,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash 756103469, now seen corresponding path program 1 times [2024-06-28 03:55:34,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:34,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568124718] [2024-06-28 03:55:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:34,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:37,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:37,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568124718] [2024-06-28 03:55:37,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568124718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:37,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:37,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427952047] [2024-06-28 03:55:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:37,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:37,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:37,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 323 transitions, 4652 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:37,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:37,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:37,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:39,205 INFO L124 PetriNetUnfolderBase]: 3440/5263 cut-off events. [2024-06-28 03:55:39,206 INFO L125 PetriNetUnfolderBase]: For 258982/259026 co-relation queries the response was YES. [2024-06-28 03:55:39,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42663 conditions, 5263 events. 3440/5263 cut-off events. For 258982/259026 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27967 event pairs, 721 based on Foata normal form. 60/5319 useless extension candidates. Maximal degree in co-relation 42580. Up to 4582 conditions per place. [2024-06-28 03:55:39,249 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2024-06-28 03:55:39,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 372 transitions, 5664 flow [2024-06-28 03:55:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:55:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:55:39,253 INFO L175 Difference]: Start difference. First operand has 176 places, 323 transitions, 4652 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:55:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 372 transitions, 5664 flow [2024-06-28 03:55:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 372 transitions, 5444 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:39,634 INFO L231 Difference]: Finished difference. Result has 178 places, 324 transitions, 4660 flow [2024-06-28 03:55:39,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4660, PETRI_PLACES=178, PETRI_TRANSITIONS=324} [2024-06-28 03:55:39,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 03:55:39,635 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 324 transitions, 4660 flow [2024-06-28 03:55:39,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:39,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:39,635 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 03:55:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:55:39,635 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:39,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash 755953367, now seen corresponding path program 4 times [2024-06-28 03:55:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455323416] [2024-06-28 03:55:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:39,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455323416] [2024-06-28 03:55:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455323416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:43,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:43,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:43,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385973731] [2024-06-28 03:55:43,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:43,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:43,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:43,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:43,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 324 transitions, 4660 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:43,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:43,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:43,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:44,606 INFO L124 PetriNetUnfolderBase]: 3528/5408 cut-off events. [2024-06-28 03:55:44,607 INFO L125 PetriNetUnfolderBase]: For 267705/267733 co-relation queries the response was YES. [2024-06-28 03:55:44,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43819 conditions, 5408 events. 3528/5408 cut-off events. For 267705/267733 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 28939 event pairs, 761 based on Foata normal form. 42/5446 useless extension candidates. Maximal degree in co-relation 43735. Up to 5012 conditions per place. [2024-06-28 03:55:44,661 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 48 changer transitions 0/371 dead transitions. [2024-06-28 03:55:44,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 371 transitions, 5647 flow [2024-06-28 03:55:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 03:55:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 03:55:44,663 INFO L175 Difference]: Start difference. First operand has 178 places, 324 transitions, 4660 flow. Second operand 9 states and 150 transitions. [2024-06-28 03:55:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 371 transitions, 5647 flow [2024-06-28 03:55:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 371 transitions, 5469 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:45,114 INFO L231 Difference]: Finished difference. Result has 180 places, 325 transitions, 4637 flow [2024-06-28 03:55:45,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4637, PETRI_PLACES=180, PETRI_TRANSITIONS=325} [2024-06-28 03:55:45,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-28 03:55:45,116 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 325 transitions, 4637 flow [2024-06-28 03:55:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:45,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:45,117 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 03:55:45,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:55:45,117 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 755949647, now seen corresponding path program 5 times [2024-06-28 03:55:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:45,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898519053] [2024-06-28 03:55:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:45,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:48,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898519053] [2024-06-28 03:55:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898519053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:48,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788711811] [2024-06-28 03:55:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:48,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:48,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 325 transitions, 4637 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:48,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:48,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:48,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:50,032 INFO L124 PetriNetUnfolderBase]: 3540/5436 cut-off events. [2024-06-28 03:55:50,033 INFO L125 PetriNetUnfolderBase]: For 267951/267979 co-relation queries the response was YES. [2024-06-28 03:55:50,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43642 conditions, 5436 events. 3540/5436 cut-off events. For 267951/267979 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29182 event pairs, 739 based on Foata normal form. 38/5470 useless extension candidates. Maximal degree in co-relation 43557. Up to 4726 conditions per place. [2024-06-28 03:55:50,088 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 51 changer transitions 0/376 dead transitions. [2024-06-28 03:55:50,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 376 transitions, 5676 flow [2024-06-28 03:55:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:55:50,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:55:50,098 INFO L175 Difference]: Start difference. First operand has 180 places, 325 transitions, 4637 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:55:50,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 376 transitions, 5676 flow [2024-06-28 03:55:50,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 376 transitions, 5549 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 03:55:50,520 INFO L231 Difference]: Finished difference. Result has 181 places, 326 transitions, 4672 flow [2024-06-28 03:55:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4672, PETRI_PLACES=181, PETRI_TRANSITIONS=326} [2024-06-28 03:55:50,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 03:55:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 326 transitions, 4672 flow [2024-06-28 03:55:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:50,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:50,533 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 03:55:50,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:55:50,533 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:50,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 40734073, now seen corresponding path program 2 times [2024-06-28 03:55:50,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:50,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405562630] [2024-06-28 03:55:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:50,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405562630] [2024-06-28 03:55:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405562630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:53,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:53,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:53,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930375863] [2024-06-28 03:55:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:53,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:53,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 326 transitions, 4672 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:53,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:53,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:53,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:55,554 INFO L124 PetriNetUnfolderBase]: 3560/5470 cut-off events. [2024-06-28 03:55:55,554 INFO L125 PetriNetUnfolderBase]: For 266493/266521 co-relation queries the response was YES. [2024-06-28 03:55:55,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44006 conditions, 5470 events. 3560/5470 cut-off events. For 266493/266521 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29427 event pairs, 716 based on Foata normal form. 26/5492 useless extension candidates. Maximal degree in co-relation 43921. Up to 5162 conditions per place. [2024-06-28 03:55:55,601 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 49 changer transitions 0/359 dead transitions. [2024-06-28 03:55:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 359 transitions, 5554 flow [2024-06-28 03:55:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:55:55,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:55:55,603 INFO L175 Difference]: Start difference. First operand has 181 places, 326 transitions, 4672 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:55:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 359 transitions, 5554 flow [2024-06-28 03:55:56,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 359 transitions, 5420 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:56,098 INFO L231 Difference]: Finished difference. Result has 182 places, 328 transitions, 4709 flow [2024-06-28 03:55:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4709, PETRI_PLACES=182, PETRI_TRANSITIONS=328} [2024-06-28 03:55:56,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 03:55:56,098 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 328 transitions, 4709 flow [2024-06-28 03:55:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:56,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:56,099 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 03:55:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:55:56,099 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:56,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 40726633, now seen corresponding path program 3 times [2024-06-28 03:55:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394361383] [2024-06-28 03:55:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394361383] [2024-06-28 03:55:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394361383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:58,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780908818] [2024-06-28 03:55:58,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:58,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:55:58,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 328 transitions, 4709 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:58,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:58,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:55:58,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:00,406 INFO L124 PetriNetUnfolderBase]: 3580/5502 cut-off events. [2024-06-28 03:56:00,407 INFO L125 PetriNetUnfolderBase]: For 273834/273862 co-relation queries the response was YES. [2024-06-28 03:56:00,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44363 conditions, 5502 events. 3580/5502 cut-off events. For 273834/273862 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29726 event pairs, 803 based on Foata normal form. 26/5524 useless extension candidates. Maximal degree in co-relation 44277. Up to 5205 conditions per place. [2024-06-28 03:56:00,457 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 52 changer transitions 0/361 dead transitions. [2024-06-28 03:56:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 361 transitions, 5603 flow [2024-06-28 03:56:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:56:00,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:56:00,458 INFO L175 Difference]: Start difference. First operand has 182 places, 328 transitions, 4709 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:56:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 361 transitions, 5603 flow [2024-06-28 03:56:00,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 361 transitions, 5456 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:00,993 INFO L231 Difference]: Finished difference. Result has 184 places, 330 transitions, 4744 flow [2024-06-28 03:56:00,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4744, PETRI_PLACES=184, PETRI_TRANSITIONS=330} [2024-06-28 03:56:00,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 03:56:00,994 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 330 transitions, 4744 flow [2024-06-28 03:56:00,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:00,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:00,994 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 03:56:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:56:00,995 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:00,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 40518871, now seen corresponding path program 6 times [2024-06-28 03:56:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770830524] [2024-06-28 03:56:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:03,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770830524] [2024-06-28 03:56:03,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770830524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:03,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:03,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:03,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584016178] [2024-06-28 03:56:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:03,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:03,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:03,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 330 transitions, 4744 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:03,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:03,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:03,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:05,350 INFO L124 PetriNetUnfolderBase]: 3668/5649 cut-off events. [2024-06-28 03:56:05,350 INFO L125 PetriNetUnfolderBase]: For 305820/305848 co-relation queries the response was YES. [2024-06-28 03:56:05,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45645 conditions, 5649 events. 3668/5649 cut-off events. For 305820/305848 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30818 event pairs, 827 based on Foata normal form. 42/5687 useless extension candidates. Maximal degree in co-relation 45558. Up to 5201 conditions per place. [2024-06-28 03:56:05,398 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 323 selfloop transitions, 56 changer transitions 0/382 dead transitions. [2024-06-28 03:56:05,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 382 transitions, 5768 flow [2024-06-28 03:56:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:56:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:56:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 03:56:05,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-28 03:56:05,400 INFO L175 Difference]: Start difference. First operand has 184 places, 330 transitions, 4744 flow. Second operand 11 states and 175 transitions. [2024-06-28 03:56:05,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 382 transitions, 5768 flow [2024-06-28 03:56:05,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 382 transitions, 5612 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:05,881 INFO L231 Difference]: Finished difference. Result has 189 places, 331 transitions, 4759 flow [2024-06-28 03:56:05,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4759, PETRI_PLACES=189, PETRI_TRANSITIONS=331} [2024-06-28 03:56:05,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 03:56:05,881 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 331 transitions, 4759 flow [2024-06-28 03:56:05,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:05,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:05,882 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 03:56:05,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:56:05,882 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:05,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 35012341, now seen corresponding path program 7 times [2024-06-28 03:56:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:05,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854010463] [2024-06-28 03:56:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854010463] [2024-06-28 03:56:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854010463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:08,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:08,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:08,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194143176] [2024-06-28 03:56:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:08,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:08,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 331 transitions, 4759 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:08,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:08,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:08,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:10,157 INFO L124 PetriNetUnfolderBase]: 3756/5800 cut-off events. [2024-06-28 03:56:10,158 INFO L125 PetriNetUnfolderBase]: For 322669/322697 co-relation queries the response was YES. [2024-06-28 03:56:10,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46901 conditions, 5800 events. 3756/5800 cut-off events. For 322669/322697 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31922 event pairs, 808 based on Foata normal form. 42/5838 useless extension candidates. Maximal degree in co-relation 46813. Up to 4931 conditions per place. [2024-06-28 03:56:10,208 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 123 changer transitions 0/377 dead transitions. [2024-06-28 03:56:10,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 377 transitions, 5765 flow [2024-06-28 03:56:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:56:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:56:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 03:56:10,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 03:56:10,209 INFO L175 Difference]: Start difference. First operand has 189 places, 331 transitions, 4759 flow. Second operand 9 states and 149 transitions. [2024-06-28 03:56:10,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 377 transitions, 5765 flow [2024-06-28 03:56:10,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 377 transitions, 5638 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 03:56:10,706 INFO L231 Difference]: Finished difference. Result has 189 places, 332 transitions, 4939 flow [2024-06-28 03:56:10,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=189, PETRI_TRANSITIONS=332} [2024-06-28 03:56:10,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 03:56:10,707 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 332 transitions, 4939 flow [2024-06-28 03:56:10,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:10,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:10,707 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 03:56:10,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:56:10,708 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:10,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash 35008621, now seen corresponding path program 8 times [2024-06-28 03:56:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27805808] [2024-06-28 03:56:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:10,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:13,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27805808] [2024-06-28 03:56:13,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27805808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:13,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:13,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:13,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152314870] [2024-06-28 03:56:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:13,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:13,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 332 transitions, 4939 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:13,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:13,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:13,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:15,328 INFO L124 PetriNetUnfolderBase]: 3892/6032 cut-off events. [2024-06-28 03:56:15,328 INFO L125 PetriNetUnfolderBase]: For 349023/349051 co-relation queries the response was YES. [2024-06-28 03:56:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49574 conditions, 6032 events. 3892/6032 cut-off events. For 349023/349051 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33621 event pairs, 832 based on Foata normal form. 38/6066 useless extension candidates. Maximal degree in co-relation 49485. Up to 4231 conditions per place. [2024-06-28 03:56:15,383 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 122 changer transitions 0/385 dead transitions. [2024-06-28 03:56:15,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 385 transitions, 6241 flow [2024-06-28 03:56:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:56:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:56:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:56:15,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 03:56:15,386 INFO L175 Difference]: Start difference. First operand has 189 places, 332 transitions, 4939 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:56:15,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 385 transitions, 6241 flow [2024-06-28 03:56:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 385 transitions, 5978 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:56:15,850 INFO L231 Difference]: Finished difference. Result has 192 places, 334 transitions, 5075 flow [2024-06-28 03:56:15,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5075, PETRI_PLACES=192, PETRI_TRANSITIONS=334} [2024-06-28 03:56:15,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-28 03:56:15,851 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 334 transitions, 5075 flow [2024-06-28 03:56:15,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:15,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:15,851 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 03:56:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:56:15,852 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:15,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1830431831, now seen corresponding path program 9 times [2024-06-28 03:56:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:15,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340903262] [2024-06-28 03:56:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:15,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:18,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340903262] [2024-06-28 03:56:18,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340903262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:18,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:18,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464269602] [2024-06-28 03:56:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:18,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:18,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:18,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 334 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:18,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:18,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:18,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:20,445 INFO L124 PetriNetUnfolderBase]: 3880/6011 cut-off events. [2024-06-28 03:56:20,446 INFO L125 PetriNetUnfolderBase]: For 347354/347386 co-relation queries the response was YES. [2024-06-28 03:56:20,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48902 conditions, 6011 events. 3880/6011 cut-off events. For 347354/347386 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33668 event pairs, 765 based on Foata normal form. 44/6051 useless extension candidates. Maximal degree in co-relation 48811. Up to 4933 conditions per place. [2024-06-28 03:56:20,501 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 263 selfloop transitions, 130 changer transitions 0/396 dead transitions. [2024-06-28 03:56:20,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 396 transitions, 6411 flow [2024-06-28 03:56:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:56:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:56:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 03:56:20,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 03:56:20,503 INFO L175 Difference]: Start difference. First operand has 192 places, 334 transitions, 5075 flow. Second operand 10 states and 176 transitions. [2024-06-28 03:56:20,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 396 transitions, 6411 flow [2024-06-28 03:56:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 396 transitions, 6159 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:21,150 INFO L231 Difference]: Finished difference. Result has 197 places, 340 transitions, 5282 flow [2024-06-28 03:56:21,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4826, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5282, PETRI_PLACES=197, PETRI_TRANSITIONS=340} [2024-06-28 03:56:21,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-28 03:56:21,152 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 340 transitions, 5282 flow [2024-06-28 03:56:21,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:21,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:21,152 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 03:56:21,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:56:21,152 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:21,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1830425879, now seen corresponding path program 4 times [2024-06-28 03:56:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:21,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247459393] [2024-06-28 03:56:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:24,282 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 03:56:24,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:24,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247459393] [2024-06-28 03:56:24,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247459393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:24,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:24,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:24,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282875309] [2024-06-28 03:56:24,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:24,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:24,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 340 transitions, 5282 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:26,314 INFO L124 PetriNetUnfolderBase]: 3900/6043 cut-off events. [2024-06-28 03:56:26,315 INFO L125 PetriNetUnfolderBase]: For 341944/341972 co-relation queries the response was YES. [2024-06-28 03:56:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50635 conditions, 6043 events. 3900/6043 cut-off events. For 341944/341972 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33824 event pairs, 873 based on Foata normal form. 26/6065 useless extension candidates. Maximal degree in co-relation 50542. Up to 5656 conditions per place. [2024-06-28 03:56:26,372 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 69 changer transitions 0/376 dead transitions. [2024-06-28 03:56:26,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 376 transitions, 6240 flow [2024-06-28 03:56:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:56:26,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:56:26,374 INFO L175 Difference]: Start difference. First operand has 197 places, 340 transitions, 5282 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:56:26,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 376 transitions, 6240 flow [2024-06-28 03:56:26,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 376 transitions, 6033 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:56:26,939 INFO L231 Difference]: Finished difference. Result has 198 places, 342 transitions, 5302 flow [2024-06-28 03:56:26,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5302, PETRI_PLACES=198, PETRI_TRANSITIONS=342} [2024-06-28 03:56:26,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 03:56:26,940 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 342 transitions, 5302 flow [2024-06-28 03:56:26,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:26,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:26,941 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 03:56:26,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:56:26,941 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:26,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2026060027, now seen corresponding path program 1 times [2024-06-28 03:56:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:26,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671055884] [2024-06-28 03:56:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671055884] [2024-06-28 03:56:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671055884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:28,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:56:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295446813] [2024-06-28 03:56:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:56:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:56:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:56:28,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:28,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 342 transitions, 5302 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:28,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:28,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:28,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:29,960 INFO L124 PetriNetUnfolderBase]: 3905/6043 cut-off events. [2024-06-28 03:56:29,961 INFO L125 PetriNetUnfolderBase]: For 344598/344612 co-relation queries the response was YES. [2024-06-28 03:56:29,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50546 conditions, 6043 events. 3905/6043 cut-off events. For 344598/344612 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33837 event pairs, 908 based on Foata normal form. 15/6056 useless extension candidates. Maximal degree in co-relation 50451. Up to 5952 conditions per place. [2024-06-28 03:56:30,017 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 343 selfloop transitions, 24 changer transitions 0/370 dead transitions. [2024-06-28 03:56:30,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 370 transitions, 6286 flow [2024-06-28 03:56:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:56:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:56:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:56:30,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-28 03:56:30,019 INFO L175 Difference]: Start difference. First operand has 198 places, 342 transitions, 5302 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:56:30,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 370 transitions, 6286 flow [2024-06-28 03:56:30,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 370 transitions, 6091 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:30,520 INFO L231 Difference]: Finished difference. Result has 199 places, 351 transitions, 5272 flow [2024-06-28 03:56:30,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5272, PETRI_PLACES=199, PETRI_TRANSITIONS=351} [2024-06-28 03:56:30,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 03:56:30,520 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 351 transitions, 5272 flow [2024-06-28 03:56:30,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:30,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:30,521 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 03:56:30,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:56:30,521 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:30,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:30,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1430719195, now seen corresponding path program 5 times [2024-06-28 03:56:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:30,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016206395] [2024-06-28 03:56:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:30,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016206395] [2024-06-28 03:56:33,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016206395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:33,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:33,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118794735] [2024-06-28 03:56:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:33,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 351 transitions, 5272 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:33,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:34,922 INFO L124 PetriNetUnfolderBase]: 3897/6040 cut-off events. [2024-06-28 03:56:34,923 INFO L125 PetriNetUnfolderBase]: For 353602/353636 co-relation queries the response was YES. [2024-06-28 03:56:34,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50349 conditions, 6040 events. 3897/6040 cut-off events. For 353602/353636 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33769 event pairs, 879 based on Foata normal form. 30/6066 useless extension candidates. Maximal degree in co-relation 50252. Up to 5666 conditions per place. [2024-06-28 03:56:34,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 70 changer transitions 0/383 dead transitions. [2024-06-28 03:56:34,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 383 transitions, 6163 flow [2024-06-28 03:56:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:56:34,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:56:34,988 INFO L175 Difference]: Start difference. First operand has 199 places, 351 transitions, 5272 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:56:34,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 383 transitions, 6163 flow [2024-06-28 03:56:35,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 383 transitions, 6127 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 03:56:35,667 INFO L231 Difference]: Finished difference. Result has 206 places, 352 transitions, 5411 flow [2024-06-28 03:56:35,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=206, PETRI_TRANSITIONS=352} [2024-06-28 03:56:35,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 03:56:35,668 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 352 transitions, 5411 flow [2024-06-28 03:56:35,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:35,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:35,668 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 03:56:35,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:56:35,668 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:35,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:35,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1790917367, now seen corresponding path program 6 times [2024-06-28 03:56:35,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:35,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739556489] [2024-06-28 03:56:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:35,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:38,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:38,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739556489] [2024-06-28 03:56:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739556489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:38,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541345344] [2024-06-28 03:56:38,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:38,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:38,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:38,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:38,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 352 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:38,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:38,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:38,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:40,238 INFO L124 PetriNetUnfolderBase]: 3917/6069 cut-off events. [2024-06-28 03:56:40,238 INFO L125 PetriNetUnfolderBase]: For 368204/368238 co-relation queries the response was YES. [2024-06-28 03:56:40,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51212 conditions, 6069 events. 3917/6069 cut-off events. For 368204/368238 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33984 event pairs, 897 based on Foata normal form. 30/6095 useless extension candidates. Maximal degree in co-relation 51112. Up to 5776 conditions per place. [2024-06-28 03:56:40,313 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 45 changer transitions 0/385 dead transitions. [2024-06-28 03:56:40,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 385 transitions, 6353 flow [2024-06-28 03:56:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:56:40,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:56:40,315 INFO L175 Difference]: Start difference. First operand has 206 places, 352 transitions, 5411 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:56:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 385 transitions, 6353 flow [2024-06-28 03:56:41,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 385 transitions, 6157 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:41,053 INFO L231 Difference]: Finished difference. Result has 208 places, 354 transitions, 5388 flow [2024-06-28 03:56:41,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5388, PETRI_PLACES=208, PETRI_TRANSITIONS=354} [2024-06-28 03:56:41,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-28 03:56:41,053 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 354 transitions, 5388 flow [2024-06-28 03:56:41,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:41,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:41,054 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 03:56:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:56:41,054 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:41,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash 77843543, now seen corresponding path program 7 times [2024-06-28 03:56:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:41,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328433219] [2024-06-28 03:56:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328433219] [2024-06-28 03:56:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328433219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:44,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773780280] [2024-06-28 03:56:44,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:44,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:44,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:44,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 354 transitions, 5388 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:44,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:44,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:45,930 INFO L124 PetriNetUnfolderBase]: 3909/6054 cut-off events. [2024-06-28 03:56:45,931 INFO L125 PetriNetUnfolderBase]: For 373181/373215 co-relation queries the response was YES. [2024-06-28 03:56:45,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50975 conditions, 6054 events. 3909/6054 cut-off events. For 373181/373215 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33769 event pairs, 796 based on Foata normal form. 30/6080 useless extension candidates. Maximal degree in co-relation 50874. Up to 5692 conditions per place. [2024-06-28 03:56:46,001 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 45 changer transitions 0/387 dead transitions. [2024-06-28 03:56:46,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 387 transitions, 6292 flow [2024-06-28 03:56:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:56:46,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:56:46,003 INFO L175 Difference]: Start difference. First operand has 208 places, 354 transitions, 5388 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:56:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 387 transitions, 6292 flow [2024-06-28 03:56:46,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 387 transitions, 6149 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:46,842 INFO L231 Difference]: Finished difference. Result has 210 places, 355 transitions, 5370 flow [2024-06-28 03:56:46,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5370, PETRI_PLACES=210, PETRI_TRANSITIONS=355} [2024-06-28 03:56:46,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-28 03:56:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 355 transitions, 5370 flow [2024-06-28 03:56:46,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:46,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:46,844 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 03:56:46,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:56:46,845 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:46,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -335875687, now seen corresponding path program 2 times [2024-06-28 03:56:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:46,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705754552] [2024-06-28 03:56:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705754552] [2024-06-28 03:56:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705754552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:56:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633174128] [2024-06-28 03:56:48,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:48,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:56:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:56:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:56:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:48,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 355 transitions, 5370 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:48,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:48,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:48,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:49,886 INFO L124 PetriNetUnfolderBase]: 3916/6061 cut-off events. [2024-06-28 03:56:49,886 INFO L125 PetriNetUnfolderBase]: For 382015/382031 co-relation queries the response was YES. [2024-06-28 03:56:49,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51184 conditions, 6061 events. 3916/6061 cut-off events. For 382015/382031 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33968 event pairs, 912 based on Foata normal form. 19/6078 useless extension candidates. Maximal degree in co-relation 51082. Up to 5964 conditions per place. [2024-06-28 03:56:49,956 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 348 selfloop transitions, 26 changer transitions 0/377 dead transitions. [2024-06-28 03:56:49,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 377 transitions, 6226 flow [2024-06-28 03:56:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:56:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:56:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 03:56:49,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:56:49,958 INFO L175 Difference]: Start difference. First operand has 210 places, 355 transitions, 5370 flow. Second operand 5 states and 90 transitions. [2024-06-28 03:56:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 377 transitions, 6226 flow [2024-06-28 03:56:50,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 377 transitions, 6069 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:50,593 INFO L231 Difference]: Finished difference. Result has 209 places, 358 transitions, 5335 flow [2024-06-28 03:56:50,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5335, PETRI_PLACES=209, PETRI_TRANSITIONS=358} [2024-06-28 03:56:50,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 03:56:50,594 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 358 transitions, 5335 flow [2024-06-28 03:56:50,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:50,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:50,594 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 03:56:50,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:56:50,595 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:50,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1834184738, now seen corresponding path program 1 times [2024-06-28 03:56:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:50,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695894463] [2024-06-28 03:56:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695894463] [2024-06-28 03:56:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695894463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:52,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:52,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623164504] [2024-06-28 03:56:52,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:52,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:52,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 358 transitions, 5335 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:52,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:52,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:52,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:53,738 INFO L124 PetriNetUnfolderBase]: 3913/6056 cut-off events. [2024-06-28 03:56:53,738 INFO L125 PetriNetUnfolderBase]: For 385641/385659 co-relation queries the response was YES. [2024-06-28 03:56:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51308 conditions, 6056 events. 3913/6056 cut-off events. For 385641/385659 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33899 event pairs, 899 based on Foata normal form. 19/6073 useless extension candidates. Maximal degree in co-relation 51205. Up to 5894 conditions per place. [2024-06-28 03:56:53,806 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 343 selfloop transitions, 46 changer transitions 0/392 dead transitions. [2024-06-28 03:56:53,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 392 transitions, 6412 flow [2024-06-28 03:56:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:56:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:56:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:56:53,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:56:53,808 INFO L175 Difference]: Start difference. First operand has 209 places, 358 transitions, 5335 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:56:53,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 392 transitions, 6412 flow [2024-06-28 03:56:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 392 transitions, 6366 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:56:54,498 INFO L231 Difference]: Finished difference. Result has 214 places, 364 transitions, 5532 flow [2024-06-28 03:56:54,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5532, PETRI_PLACES=214, PETRI_TRANSITIONS=364} [2024-06-28 03:56:54,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 03:56:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 364 transitions, 5532 flow [2024-06-28 03:56:54,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:54,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:54,499 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 03:56:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:56:54,499 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 537718471, now seen corresponding path program 1 times [2024-06-28 03:56:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:54,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508688514] [2024-06-28 03:56:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:57,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508688514] [2024-06-28 03:56:57,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508688514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:57,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:57,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047829121] [2024-06-28 03:56:57,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:57,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:57,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:57,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:56:57,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 364 transitions, 5532 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:57,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:57,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:56:57,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:59,768 INFO L124 PetriNetUnfolderBase]: 3961/6144 cut-off events. [2024-06-28 03:56:59,769 INFO L125 PetriNetUnfolderBase]: For 416602/416648 co-relation queries the response was YES. [2024-06-28 03:56:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52711 conditions, 6144 events. 3961/6144 cut-off events. For 416602/416648 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34535 event pairs, 827 based on Foata normal form. 46/6186 useless extension candidates. Maximal degree in co-relation 52606. Up to 5752 conditions per place. [2024-06-28 03:56:59,838 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 50 changer transitions 0/404 dead transitions. [2024-06-28 03:56:59,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 404 transitions, 6540 flow [2024-06-28 03:56:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:56:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:56:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 03:56:59,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 03:56:59,840 INFO L175 Difference]: Start difference. First operand has 214 places, 364 transitions, 5532 flow. Second operand 9 states and 145 transitions. [2024-06-28 03:56:59,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 404 transitions, 6540 flow [2024-06-28 03:57:00,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 404 transitions, 6445 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:57:00,509 INFO L231 Difference]: Finished difference. Result has 219 places, 365 transitions, 5601 flow [2024-06-28 03:57:00,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5601, PETRI_PLACES=219, PETRI_TRANSITIONS=365} [2024-06-28 03:57:00,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 03:57:00,509 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 365 transitions, 5601 flow [2024-06-28 03:57:00,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:00,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:00,510 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 03:57:00,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:57:00,510 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:00,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -787847293, now seen corresponding path program 2 times [2024-06-28 03:57:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:00,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269631990] [2024-06-28 03:57:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:00,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:03,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269631990] [2024-06-28 03:57:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269631990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:03,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:03,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925517161] [2024-06-28 03:57:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:03,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:03,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 365 transitions, 5601 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:03,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:03,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:03,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:05,313 INFO L124 PetriNetUnfolderBase]: 4009/6227 cut-off events. [2024-06-28 03:57:05,313 INFO L125 PetriNetUnfolderBase]: For 434393/434439 co-relation queries the response was YES. [2024-06-28 03:57:05,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53695 conditions, 6227 events. 4009/6227 cut-off events. For 434393/434439 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35280 event pairs, 904 based on Foata normal form. 46/6269 useless extension candidates. Maximal degree in co-relation 53589. Up to 5847 conditions per place. [2024-06-28 03:57:05,382 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 55 changer transitions 0/415 dead transitions. [2024-06-28 03:57:05,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 415 transitions, 6671 flow [2024-06-28 03:57:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:57:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:57:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-28 03:57:05,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-28 03:57:05,384 INFO L175 Difference]: Start difference. First operand has 219 places, 365 transitions, 5601 flow. Second operand 11 states and 172 transitions. [2024-06-28 03:57:05,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 415 transitions, 6671 flow [2024-06-28 03:57:06,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 415 transitions, 6537 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 03:57:06,244 INFO L231 Difference]: Finished difference. Result has 223 places, 366 transitions, 5641 flow [2024-06-28 03:57:06,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5641, PETRI_PLACES=223, PETRI_TRANSITIONS=366} [2024-06-28 03:57:06,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:57:06,245 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 366 transitions, 5641 flow [2024-06-28 03:57:06,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:06,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:06,245 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 03:57:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:57:06,245 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:06,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash -908625453, now seen corresponding path program 3 times [2024-06-28 03:57:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245903182] [2024-06-28 03:57:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:09,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245903182] [2024-06-28 03:57:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245903182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:09,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:09,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:09,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130054205] [2024-06-28 03:57:09,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:09,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:09,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 366 transitions, 5641 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:09,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:09,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:09,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:11,266 INFO L124 PetriNetUnfolderBase]: 4057/6319 cut-off events. [2024-06-28 03:57:11,266 INFO L125 PetriNetUnfolderBase]: For 449188/449234 co-relation queries the response was YES. [2024-06-28 03:57:11,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54427 conditions, 6319 events. 4057/6319 cut-off events. For 449188/449234 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36111 event pairs, 891 based on Foata normal form. 46/6361 useless extension candidates. Maximal degree in co-relation 54320. Up to 5767 conditions per place. [2024-06-28 03:57:11,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 89 changer transitions 0/408 dead transitions. [2024-06-28 03:57:11,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 408 transitions, 6679 flow [2024-06-28 03:57:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:57:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:57:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 03:57:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 03:57:11,341 INFO L175 Difference]: Start difference. First operand has 223 places, 366 transitions, 5641 flow. Second operand 9 states and 145 transitions. [2024-06-28 03:57:11,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 408 transitions, 6679 flow [2024-06-28 03:57:12,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 408 transitions, 6537 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-28 03:57:12,171 INFO L231 Difference]: Finished difference. Result has 223 places, 367 transitions, 5743 flow [2024-06-28 03:57:12,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5743, PETRI_PLACES=223, PETRI_TRANSITIONS=367} [2024-06-28 03:57:12,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:57:12,172 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 367 transitions, 5743 flow [2024-06-28 03:57:12,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:12,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:12,172 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 03:57:12,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:57:12,173 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1591622144, now seen corresponding path program 1 times [2024-06-28 03:57:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884084681] [2024-06-28 03:57:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:13,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884084681] [2024-06-28 03:57:13,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884084681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:13,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:13,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919932456] [2024-06-28 03:57:13,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:13,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:13,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:13,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 367 transitions, 5743 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:13,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:13,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:13,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:15,648 INFO L124 PetriNetUnfolderBase]: 4067/6323 cut-off events. [2024-06-28 03:57:15,648 INFO L125 PetriNetUnfolderBase]: For 444188/444208 co-relation queries the response was YES. [2024-06-28 03:57:15,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54717 conditions, 6323 events. 4067/6323 cut-off events. For 444188/444208 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35980 event pairs, 962 based on Foata normal form. 22/6343 useless extension candidates. Maximal degree in co-relation 54609. Up to 6204 conditions per place. [2024-06-28 03:57:15,718 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 359 selfloop transitions, 34 changer transitions 0/396 dead transitions. [2024-06-28 03:57:15,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 396 transitions, 6819 flow [2024-06-28 03:57:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:57:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:57:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:57:15,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:57:15,720 INFO L175 Difference]: Start difference. First operand has 223 places, 367 transitions, 5743 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:57:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 396 transitions, 6819 flow [2024-06-28 03:57:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 396 transitions, 6607 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 03:57:16,545 INFO L231 Difference]: Finished difference. Result has 223 places, 373 transitions, 5711 flow [2024-06-28 03:57:16,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5711, PETRI_PLACES=223, PETRI_TRANSITIONS=373} [2024-06-28 03:57:16,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:57:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 373 transitions, 5711 flow [2024-06-28 03:57:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:16,546 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 03:57:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:57:16,546 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:16,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2118494198, now seen corresponding path program 2 times [2024-06-28 03:57:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:16,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655418246] [2024-06-28 03:57:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:18,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655418246] [2024-06-28 03:57:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655418246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:18,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993500847] [2024-06-28 03:57:18,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:18,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:18,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:18,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:18,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 373 transitions, 5711 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:18,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:18,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:18,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:20,158 INFO L124 PetriNetUnfolderBase]: 4072/6330 cut-off events. [2024-06-28 03:57:20,158 INFO L125 PetriNetUnfolderBase]: For 451369/451391 co-relation queries the response was YES. [2024-06-28 03:57:20,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54767 conditions, 6330 events. 4072/6330 cut-off events. For 451369/451391 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36004 event pairs, 962 based on Foata normal form. 23/6351 useless extension candidates. Maximal degree in co-relation 54658. Up to 6237 conditions per place. [2024-06-28 03:57:20,231 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 365 selfloop transitions, 27 changer transitions 0/395 dead transitions. [2024-06-28 03:57:20,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 395 transitions, 6617 flow [2024-06-28 03:57:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:57:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:57:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 03:57:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-28 03:57:20,233 INFO L175 Difference]: Start difference. First operand has 223 places, 373 transitions, 5711 flow. Second operand 7 states and 106 transitions. [2024-06-28 03:57:20,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 395 transitions, 6617 flow [2024-06-28 03:57:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 395 transitions, 6566 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 03:57:21,129 INFO L231 Difference]: Finished difference. Result has 227 places, 376 transitions, 5786 flow [2024-06-28 03:57:21,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5786, PETRI_PLACES=227, PETRI_TRANSITIONS=376} [2024-06-28 03:57:21,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-28 03:57:21,130 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 376 transitions, 5786 flow [2024-06-28 03:57:21,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:21,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:21,131 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 03:57:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:57:21,131 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:21,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1534983353, now seen corresponding path program 4 times [2024-06-28 03:57:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:21,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089883859] [2024-06-28 03:57:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:24,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089883859] [2024-06-28 03:57:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089883859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:24,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810431929] [2024-06-28 03:57:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:24,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:24,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 376 transitions, 5786 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:24,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:24,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:24,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:26,213 INFO L124 PetriNetUnfolderBase]: 4052/6306 cut-off events. [2024-06-28 03:57:26,213 INFO L125 PetriNetUnfolderBase]: For 463746/463798 co-relation queries the response was YES. [2024-06-28 03:57:26,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54073 conditions, 6306 events. 4052/6306 cut-off events. For 463746/463798 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35961 event pairs, 899 based on Foata normal form. 50/6352 useless extension candidates. Maximal degree in co-relation 53962. Up to 5849 conditions per place. [2024-06-28 03:57:26,276 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 349 selfloop transitions, 73 changer transitions 0/425 dead transitions. [2024-06-28 03:57:26,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 425 transitions, 6816 flow [2024-06-28 03:57:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:57:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:57:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-28 03:57:26,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-28 03:57:26,278 INFO L175 Difference]: Start difference. First operand has 227 places, 376 transitions, 5786 flow. Second operand 11 states and 173 transitions. [2024-06-28 03:57:26,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 425 transitions, 6816 flow [2024-06-28 03:57:27,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 425 transitions, 6734 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:57:27,073 INFO L231 Difference]: Finished difference. Result has 234 places, 376 transitions, 5856 flow [2024-06-28 03:57:27,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5856, PETRI_PLACES=234, PETRI_TRANSITIONS=376} [2024-06-28 03:57:27,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 03:57:27,074 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 376 transitions, 5856 flow [2024-06-28 03:57:27,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:27,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:27,074 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 03:57:27,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:57:27,074 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:27,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1409110783, now seen corresponding path program 5 times [2024-06-28 03:57:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:27,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125695482] [2024-06-28 03:57:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125695482] [2024-06-28 03:57:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125695482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:29,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248466] [2024-06-28 03:57:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:29,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:29,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 376 transitions, 5856 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:29,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:29,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:29,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:31,815 INFO L124 PetriNetUnfolderBase]: 4100/6388 cut-off events. [2024-06-28 03:57:31,815 INFO L125 PetriNetUnfolderBase]: For 480585/480637 co-relation queries the response was YES. [2024-06-28 03:57:31,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55095 conditions, 6388 events. 4100/6388 cut-off events. For 480585/480637 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 36569 event pairs, 933 based on Foata normal form. 50/6434 useless extension candidates. Maximal degree in co-relation 54983. Up to 6011 conditions per place. [2024-06-28 03:57:31,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 46 changer transitions 0/416 dead transitions. [2024-06-28 03:57:31,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 416 transitions, 6888 flow [2024-06-28 03:57:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:57:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:57:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:57:31,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:57:31,882 INFO L175 Difference]: Start difference. First operand has 234 places, 376 transitions, 5856 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:57:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 416 transitions, 6888 flow [2024-06-28 03:57:32,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 416 transitions, 6682 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 03:57:32,652 INFO L231 Difference]: Finished difference. Result has 233 places, 377 transitions, 5808 flow [2024-06-28 03:57:32,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5808, PETRI_PLACES=233, PETRI_TRANSITIONS=377} [2024-06-28 03:57:32,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 03:57:32,653 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 377 transitions, 5808 flow [2024-06-28 03:57:32,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:32,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:32,654 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 03:57:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:57:32,654 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:32,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815515, now seen corresponding path program 6 times [2024-06-28 03:57:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599377834] [2024-06-28 03:57:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:35,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:35,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599377834] [2024-06-28 03:57:35,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599377834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:35,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:35,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:57:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916269199] [2024-06-28 03:57:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:57:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:57:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:57:35,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:35,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 377 transitions, 5808 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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 03:57:35,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:35,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:35,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:37,108 INFO L124 PetriNetUnfolderBase]: 4080/6353 cut-off events. [2024-06-28 03:57:37,109 INFO L125 PetriNetUnfolderBase]: For 471394/471446 co-relation queries the response was YES. [2024-06-28 03:57:37,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53928 conditions, 6353 events. 4080/6353 cut-off events. For 471394/471446 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36226 event pairs, 808 based on Foata normal form. 50/6399 useless extension candidates. Maximal degree in co-relation 53815. Up to 5907 conditions per place. [2024-06-28 03:57:37,179 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 46 changer transitions 0/416 dead transitions. [2024-06-28 03:57:37,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 416 transitions, 6672 flow [2024-06-28 03:57:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:57:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:57:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 03:57:37,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 03:57:37,184 INFO L175 Difference]: Start difference. First operand has 233 places, 377 transitions, 5808 flow. Second operand 9 states and 142 transitions. [2024-06-28 03:57:37,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 416 transitions, 6672 flow [2024-06-28 03:57:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 416 transitions, 6544 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:57:37,933 INFO L231 Difference]: Finished difference. Result has 234 places, 376 transitions, 5662 flow [2024-06-28 03:57:37,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=234, PETRI_TRANSITIONS=376} [2024-06-28 03:57:37,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 03:57:37,934 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 376 transitions, 5662 flow [2024-06-28 03:57:37,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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 03:57:37,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:37,934 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 03:57:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:57:37,935 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:37,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1822209686, now seen corresponding path program 2 times [2024-06-28 03:57:37,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125529178] [2024-06-28 03:57:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:39,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125529178] [2024-06-28 03:57:39,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125529178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:39,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300515242] [2024-06-28 03:57:39,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:39,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 376 transitions, 5662 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:39,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:39,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:39,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:41,257 INFO L124 PetriNetUnfolderBase]: 4074/6342 cut-off events. [2024-06-28 03:57:41,257 INFO L125 PetriNetUnfolderBase]: For 460175/460197 co-relation queries the response was YES. [2024-06-28 03:57:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53763 conditions, 6342 events. 4074/6342 cut-off events. For 460175/460197 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36217 event pairs, 951 based on Foata normal form. 24/6364 useless extension candidates. Maximal degree in co-relation 53649. Up to 6239 conditions per place. [2024-06-28 03:57:41,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 365 selfloop transitions, 29 changer transitions 0/397 dead transitions. [2024-06-28 03:57:41,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 397 transitions, 6522 flow [2024-06-28 03:57:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:57:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:57:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 03:57:41,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 03:57:41,329 INFO L175 Difference]: Start difference. First operand has 234 places, 376 transitions, 5662 flow. Second operand 6 states and 100 transitions. [2024-06-28 03:57:41,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 397 transitions, 6522 flow [2024-06-28 03:57:42,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 397 transitions, 6229 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-28 03:57:42,199 INFO L231 Difference]: Finished difference. Result has 231 places, 376 transitions, 5433 flow [2024-06-28 03:57:42,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5433, PETRI_PLACES=231, PETRI_TRANSITIONS=376} [2024-06-28 03:57:42,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 03:57:42,200 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 376 transitions, 5433 flow [2024-06-28 03:57:42,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:42,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:42,204 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 03:57:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:57:42,204 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:42,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1569203252, now seen corresponding path program 3 times [2024-06-28 03:57:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:42,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876323512] [2024-06-28 03:57:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876323512] [2024-06-28 03:57:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876323512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:43,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946084487] [2024-06-28 03:57:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:43,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:43,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 376 transitions, 5433 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:43,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:43,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:43,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:45,514 INFO L124 PetriNetUnfolderBase]: 4081/6351 cut-off events. [2024-06-28 03:57:45,514 INFO L125 PetriNetUnfolderBase]: For 467819/467839 co-relation queries the response was YES. [2024-06-28 03:57:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52984 conditions, 6351 events. 4081/6351 cut-off events. For 467819/467839 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36264 event pairs, 938 based on Foata normal form. 23/6372 useless extension candidates. Maximal degree in co-relation 52871. Up to 6200 conditions per place. [2024-06-28 03:57:45,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 53 changer transitions 0/414 dead transitions. [2024-06-28 03:57:45,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 414 transitions, 6528 flow [2024-06-28 03:57:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:57:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:57:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 03:57:45,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:57:45,592 INFO L175 Difference]: Start difference. First operand has 231 places, 376 transitions, 5433 flow. Second operand 6 states and 108 transitions. [2024-06-28 03:57:45,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 414 transitions, 6528 flow [2024-06-28 03:57:46,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 414 transitions, 6399 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:57:46,480 INFO L231 Difference]: Finished difference. Result has 234 places, 387 transitions, 5670 flow [2024-06-28 03:57:46,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5670, PETRI_PLACES=234, PETRI_TRANSITIONS=387} [2024-06-28 03:57:46,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 03:57:46,490 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 387 transitions, 5670 flow [2024-06-28 03:57:46,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:46,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:46,490 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 03:57:46,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:57:46,490 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:46,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1297938656, now seen corresponding path program 1 times [2024-06-28 03:57:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:46,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309474036] [2024-06-28 03:57:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:46,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:48,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:48,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309474036] [2024-06-28 03:57:48,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309474036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:48,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:48,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990583200] [2024-06-28 03:57:48,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:48,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:48,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 387 transitions, 5670 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:48,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:48,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:48,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:50,472 INFO L124 PetriNetUnfolderBase]: 4117/6405 cut-off events. [2024-06-28 03:57:50,472 INFO L125 PetriNetUnfolderBase]: For 489284/489348 co-relation queries the response was YES. [2024-06-28 03:57:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54330 conditions, 6405 events. 4117/6405 cut-off events. For 489284/489348 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 36538 event pairs, 927 based on Foata normal form. 50/6451 useless extension candidates. Maximal degree in co-relation 54214. Up to 6073 conditions per place. [2024-06-28 03:57:50,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 53 changer transitions 0/426 dead transitions. [2024-06-28 03:57:50,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 426 transitions, 7086 flow [2024-06-28 03:57:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:57:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:57:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:57:50,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:57:50,539 INFO L175 Difference]: Start difference. First operand has 234 places, 387 transitions, 5670 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:57:50,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 426 transitions, 7086 flow [2024-06-28 03:57:51,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 426 transitions, 7008 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-28 03:57:51,296 INFO L231 Difference]: Finished difference. Result has 241 places, 400 transitions, 5959 flow [2024-06-28 03:57:51,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5959, PETRI_PLACES=241, PETRI_TRANSITIONS=400} [2024-06-28 03:57:51,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 03:57:51,296 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 400 transitions, 5959 flow [2024-06-28 03:57:51,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:51,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:51,297 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 03:57:51,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:57:51,297 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:51,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:51,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1999156880, now seen corresponding path program 2 times [2024-06-28 03:57:51,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:51,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041296289] [2024-06-28 03:57:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:51,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:53,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:53,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041296289] [2024-06-28 03:57:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041296289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:53,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159781343] [2024-06-28 03:57:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:53,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:53,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 400 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:53,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:53,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:53,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:55,089 INFO L124 PetriNetUnfolderBase]: 4276/6627 cut-off events. [2024-06-28 03:57:55,089 INFO L125 PetriNetUnfolderBase]: For 544549/544549 co-relation queries the response was YES. [2024-06-28 03:57:55,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57701 conditions, 6627 events. 4276/6627 cut-off events. For 544549/544549 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 37910 event pairs, 981 based on Foata normal form. 12/6637 useless extension candidates. Maximal degree in co-relation 57581. Up to 6428 conditions per place. [2024-06-28 03:57:55,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 39 changer transitions 0/445 dead transitions. [2024-06-28 03:57:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 445 transitions, 7443 flow [2024-06-28 03:57:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:57:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:57:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:57:55,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:57:55,172 INFO L175 Difference]: Start difference. First operand has 241 places, 400 transitions, 5959 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:57:55,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 445 transitions, 7443 flow [2024-06-28 03:57:56,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 445 transitions, 7344 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-28 03:57:56,140 INFO L231 Difference]: Finished difference. Result has 248 places, 420 transitions, 6345 flow [2024-06-28 03:57:56,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=248, PETRI_TRANSITIONS=420} [2024-06-28 03:57:56,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 03:57:56,140 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 420 transitions, 6345 flow [2024-06-28 03:57:56,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:56,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:56,141 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 03:57:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:57:56,141 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:56,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1555088270, now seen corresponding path program 3 times [2024-06-28 03:57:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:56,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927447791] [2024-06-28 03:57:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:58,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:58,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927447791] [2024-06-28 03:57:58,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927447791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:58,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:58,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:57:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56417299] [2024-06-28 03:57:58,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:58,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:57:58,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:57:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:57:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:57:58,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 420 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:57:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:00,518 INFO L124 PetriNetUnfolderBase]: 4404/6809 cut-off events. [2024-06-28 03:58:00,519 INFO L125 PetriNetUnfolderBase]: For 579704/579730 co-relation queries the response was YES. [2024-06-28 03:58:00,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60553 conditions, 6809 events. 4404/6809 cut-off events. For 579704/579730 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39047 event pairs, 937 based on Foata normal form. 38/6845 useless extension candidates. Maximal degree in co-relation 60430. Up to 6310 conditions per place. [2024-06-28 03:58:00,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 100 changer transitions 0/474 dead transitions. [2024-06-28 03:58:00,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 474 transitions, 7908 flow [2024-06-28 03:58:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:58:00,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:58:00,604 INFO L175 Difference]: Start difference. First operand has 248 places, 420 transitions, 6345 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:58:00,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 474 transitions, 7908 flow [2024-06-28 03:58:01,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 474 transitions, 7761 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-28 03:58:01,612 INFO L231 Difference]: Finished difference. Result has 254 places, 435 transitions, 6841 flow [2024-06-28 03:58:01,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6841, PETRI_PLACES=254, PETRI_TRANSITIONS=435} [2024-06-28 03:58:01,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 03:58:01,613 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 435 transitions, 6841 flow [2024-06-28 03:58:01,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:01,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:01,613 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 03:58:01,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:58:01,613 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:01,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1555334534, now seen corresponding path program 1 times [2024-06-28 03:58:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:01,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717958460] [2024-06-28 03:58:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:01,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717958460] [2024-06-28 03:58:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717958460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:04,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:04,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604954898] [2024-06-28 03:58:04,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:04,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:04,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 435 transitions, 6841 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:04,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:04,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:04,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:06,192 INFO L124 PetriNetUnfolderBase]: 4399/6801 cut-off events. [2024-06-28 03:58:06,192 INFO L125 PetriNetUnfolderBase]: For 576688/576688 co-relation queries the response was YES. [2024-06-28 03:58:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61619 conditions, 6801 events. 4399/6801 cut-off events. For 576688/576688 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38859 event pairs, 996 based on Foata normal form. 2/6801 useless extension candidates. Maximal degree in co-relation 61493. Up to 6733 conditions per place. [2024-06-28 03:58:06,277 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 430 selfloop transitions, 14 changer transitions 0/447 dead transitions. [2024-06-28 03:58:06,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 447 transitions, 7799 flow [2024-06-28 03:58:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:58:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:58:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-28 03:58:06,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-28 03:58:06,278 INFO L175 Difference]: Start difference. First operand has 254 places, 435 transitions, 6841 flow. Second operand 5 states and 78 transitions. [2024-06-28 03:58:06,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 447 transitions, 7799 flow [2024-06-28 03:58:07,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 447 transitions, 7653 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-28 03:58:07,452 INFO L231 Difference]: Finished difference. Result has 255 places, 437 transitions, 6772 flow [2024-06-28 03:58:07,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6699, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6772, PETRI_PLACES=255, PETRI_TRANSITIONS=437} [2024-06-28 03:58:07,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-28 03:58:07,453 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 437 transitions, 6772 flow [2024-06-28 03:58:07,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:07,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:07,453 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 03:58:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:58:07,454 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:07,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1025159652, now seen corresponding path program 1 times [2024-06-28 03:58:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022645624] [2024-06-28 03:58:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022645624] [2024-06-28 03:58:09,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022645624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:09,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:09,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309261413] [2024-06-28 03:58:09,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:09,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:09,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:09,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:09,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 437 transitions, 6772 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:09,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:09,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:09,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:11,485 INFO L124 PetriNetUnfolderBase]: 4404/6805 cut-off events. [2024-06-28 03:58:11,486 INFO L125 PetriNetUnfolderBase]: For 552644/552674 co-relation queries the response was YES. [2024-06-28 03:58:11,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60674 conditions, 6805 events. 4404/6805 cut-off events. For 552644/552674 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39026 event pairs, 926 based on Foata normal form. 29/6832 useless extension candidates. Maximal degree in co-relation 60546. Up to 6525 conditions per place. [2024-06-28 03:58:11,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 80 changer transitions 0/480 dead transitions. [2024-06-28 03:58:11,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 480 transitions, 8099 flow [2024-06-28 03:58:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:58:11,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:58:11,579 INFO L175 Difference]: Start difference. First operand has 255 places, 437 transitions, 6772 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:58:11,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 480 transitions, 8099 flow [2024-06-28 03:58:12,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 480 transitions, 8040 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 03:58:12,601 INFO L231 Difference]: Finished difference. Result has 260 places, 443 transitions, 7010 flow [2024-06-28 03:58:12,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6713, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7010, PETRI_PLACES=260, PETRI_TRANSITIONS=443} [2024-06-28 03:58:12,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 03:58:12,602 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 443 transitions, 7010 flow [2024-06-28 03:58:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:12,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:12,603 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 03:58:12,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:58:12,603 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:12,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1989276883, now seen corresponding path program 1 times [2024-06-28 03:58:12,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:12,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889956137] [2024-06-28 03:58:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889956137] [2024-06-28 03:58:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889956137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589009914] [2024-06-28 03:58:14,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:14,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:14,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 443 transitions, 7010 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:14,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:14,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:14,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:16,714 INFO L124 PetriNetUnfolderBase]: 4414/6817 cut-off events. [2024-06-28 03:58:16,714 INFO L125 PetriNetUnfolderBase]: For 573596/573620 co-relation queries the response was YES. [2024-06-28 03:58:16,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61611 conditions, 6817 events. 4414/6817 cut-off events. For 573596/573620 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38990 event pairs, 969 based on Foata normal form. 26/6841 useless extension candidates. Maximal degree in co-relation 61482. Up to 6610 conditions per place. [2024-06-28 03:58:16,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 68 changer transitions 0/488 dead transitions. [2024-06-28 03:58:16,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 488 transitions, 8461 flow [2024-06-28 03:58:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:58:16,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:58:16,793 INFO L175 Difference]: Start difference. First operand has 260 places, 443 transitions, 7010 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:58:16,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 488 transitions, 8461 flow [2024-06-28 03:58:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 488 transitions, 8342 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 03:58:18,018 INFO L231 Difference]: Finished difference. Result has 266 places, 456 transitions, 7350 flow [2024-06-28 03:58:18,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7350, PETRI_PLACES=266, PETRI_TRANSITIONS=456} [2024-06-28 03:58:18,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-28 03:58:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 456 transitions, 7350 flow [2024-06-28 03:58:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:18,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:18,019 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 03:58:18,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:58:18,019 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:18,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1241640522, now seen corresponding path program 2 times [2024-06-28 03:58:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:18,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813327601] [2024-06-28 03:58:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813327601] [2024-06-28 03:58:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813327601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:20,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689159420] [2024-06-28 03:58:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:20,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:20,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 456 transitions, 7350 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:20,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:20,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:20,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:22,046 INFO L124 PetriNetUnfolderBase]: 4419/6824 cut-off events. [2024-06-28 03:58:22,047 INFO L125 PetriNetUnfolderBase]: For 589822/589848 co-relation queries the response was YES. [2024-06-28 03:58:22,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62685 conditions, 6824 events. 4419/6824 cut-off events. For 589822/589848 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39054 event pairs, 968 based on Foata normal form. 27/6849 useless extension candidates. Maximal degree in co-relation 62552. Up to 6658 conditions per place. [2024-06-28 03:58:22,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-28 03:58:22,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 487 transitions, 8461 flow [2024-06-28 03:58:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 03:58:22,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 03:58:22,139 INFO L175 Difference]: Start difference. First operand has 266 places, 456 transitions, 7350 flow. Second operand 8 states and 124 transitions. [2024-06-28 03:58:22,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 487 transitions, 8461 flow [2024-06-28 03:58:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 487 transitions, 8369 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 03:58:23,609 INFO L231 Difference]: Finished difference. Result has 271 places, 459 transitions, 7424 flow [2024-06-28 03:58:23,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7424, PETRI_PLACES=271, PETRI_TRANSITIONS=459} [2024-06-28 03:58:23,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 03:58:23,623 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 459 transitions, 7424 flow [2024-06-28 03:58:23,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:23,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:23,623 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 03:58:23,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:58:23,623 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:23,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash -999339096, now seen corresponding path program 1 times [2024-06-28 03:58:23,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:23,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954299005] [2024-06-28 03:58:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:25,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954299005] [2024-06-28 03:58:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954299005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:25,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:58:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164755446] [2024-06-28 03:58:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:58:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:58:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:58:25,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:25,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 459 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:25,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:25,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:25,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:27,693 INFO L124 PetriNetUnfolderBase]: 4440/6860 cut-off events. [2024-06-28 03:58:27,694 INFO L125 PetriNetUnfolderBase]: For 610412/610442 co-relation queries the response was YES. [2024-06-28 03:58:27,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63429 conditions, 6860 events. 4440/6860 cut-off events. For 610412/610442 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39383 event pairs, 988 based on Foata normal form. 27/6885 useless extension candidates. Maximal degree in co-relation 63294. Up to 6469 conditions per place. [2024-06-28 03:58:27,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 81 changer transitions 0/499 dead transitions. [2024-06-28 03:58:27,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 499 transitions, 9177 flow [2024-06-28 03:58:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:58:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:58:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:58:27,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:58:27,786 INFO L175 Difference]: Start difference. First operand has 271 places, 459 transitions, 7424 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:58:27,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 499 transitions, 9177 flow [2024-06-28 03:58:29,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 499 transitions, 9031 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:58:29,016 INFO L231 Difference]: Finished difference. Result has 273 places, 471 transitions, 7739 flow [2024-06-28 03:58:29,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7739, PETRI_PLACES=273, PETRI_TRANSITIONS=471} [2024-06-28 03:58:29,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:58:29,017 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 471 transitions, 7739 flow [2024-06-28 03:58:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:29,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:29,017 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 03:58:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:58:29,017 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1232382124, now seen corresponding path program 2 times [2024-06-28 03:58:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559522841] [2024-06-28 03:58:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:30,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:30,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559522841] [2024-06-28 03:58:30,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559522841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:30,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:30,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:58:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831893342] [2024-06-28 03:58:30,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:30,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:58:30,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:58:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:58:30,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:30,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 471 transitions, 7739 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:30,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:30,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:30,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:33,113 INFO L124 PetriNetUnfolderBase]: 4453/6875 cut-off events. [2024-06-28 03:58:33,113 INFO L125 PetriNetUnfolderBase]: For 629741/629771 co-relation queries the response was YES. [2024-06-28 03:58:33,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64201 conditions, 6875 events. 4453/6875 cut-off events. For 629741/629771 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39430 event pairs, 997 based on Foata normal form. 27/6900 useless extension candidates. Maximal degree in co-relation 64064. Up to 6482 conditions per place. [2024-06-28 03:58:33,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 87 changer transitions 0/498 dead transitions. [2024-06-28 03:58:33,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 498 transitions, 9302 flow [2024-06-28 03:58:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:58:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:58:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:58:33,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:58:33,202 INFO L175 Difference]: Start difference. First operand has 273 places, 471 transitions, 7739 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:58:33,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 498 transitions, 9302 flow [2024-06-28 03:58:34,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 498 transitions, 9181 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 03:58:34,467 INFO L231 Difference]: Finished difference. Result has 278 places, 474 transitions, 7865 flow [2024-06-28 03:58:34,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7621, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7865, PETRI_PLACES=278, PETRI_TRANSITIONS=474} [2024-06-28 03:58:34,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 03:58:34,467 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 474 transitions, 7865 flow [2024-06-28 03:58:34,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:34,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:34,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:58:34,468 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:34,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -993629144, now seen corresponding path program 3 times [2024-06-28 03:58:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783938540] [2024-06-28 03:58:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783938540] [2024-06-28 03:58:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783938540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:36,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:36,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294571349] [2024-06-28 03:58:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:36,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 474 transitions, 7865 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:38,917 INFO L124 PetriNetUnfolderBase]: 4458/6878 cut-off events. [2024-06-28 03:58:38,917 INFO L125 PetriNetUnfolderBase]: For 646408/646434 co-relation queries the response was YES. [2024-06-28 03:58:38,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64529 conditions, 6878 events. 4458/6878 cut-off events. For 646408/646434 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39368 event pairs, 985 based on Foata normal form. 27/6903 useless extension candidates. Maximal degree in co-relation 64390. Up to 6782 conditions per place. [2024-06-28 03:58:38,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 30 changer transitions 0/497 dead transitions. [2024-06-28 03:58:38,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 497 transitions, 8973 flow [2024-06-28 03:58:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-28 03:58:38,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-28 03:58:38,995 INFO L175 Difference]: Start difference. First operand has 278 places, 474 transitions, 7865 flow. Second operand 8 states and 115 transitions. [2024-06-28 03:58:38,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 497 transitions, 8973 flow [2024-06-28 03:58:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 497 transitions, 8810 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 03:58:40,198 INFO L231 Difference]: Finished difference. Result has 283 places, 477 transitions, 7830 flow [2024-06-28 03:58:40,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7830, PETRI_PLACES=283, PETRI_TRANSITIONS=477} [2024-06-28 03:58:40,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 03:58:40,199 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 477 transitions, 7830 flow [2024-06-28 03:58:40,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:40,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:40,199 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 03:58:40,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:58:40,200 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:40,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash -993617643, now seen corresponding path program 2 times [2024-06-28 03:58:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573321635] [2024-06-28 03:58:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:40,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573321635] [2024-06-28 03:58:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573321635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:41,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017853408] [2024-06-28 03:58:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:41,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:41,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 477 transitions, 7830 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:41,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:41,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:44,225 INFO L124 PetriNetUnfolderBase]: 4468/6892 cut-off events. [2024-06-28 03:58:44,226 INFO L125 PetriNetUnfolderBase]: For 664526/664552 co-relation queries the response was YES. [2024-06-28 03:58:44,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64591 conditions, 6892 events. 4468/6892 cut-off events. For 664526/664552 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39487 event pairs, 986 based on Foata normal form. 28/6918 useless extension candidates. Maximal degree in co-relation 64451. Up to 6784 conditions per place. [2024-06-28 03:58:44,318 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 39 changer transitions 0/504 dead transitions. [2024-06-28 03:58:44,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 504 transitions, 9038 flow [2024-06-28 03:58:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 03:58:44,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-28 03:58:44,320 INFO L175 Difference]: Start difference. First operand has 283 places, 477 transitions, 7830 flow. Second operand 8 states and 118 transitions. [2024-06-28 03:58:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 504 transitions, 9038 flow [2024-06-28 03:58:45,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 504 transitions, 8938 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:58:45,627 INFO L231 Difference]: Finished difference. Result has 285 places, 483 transitions, 7960 flow [2024-06-28 03:58:45,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7730, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7960, PETRI_PLACES=285, PETRI_TRANSITIONS=483} [2024-06-28 03:58:45,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 03:58:45,628 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 483 transitions, 7960 flow [2024-06-28 03:58:45,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:58:45,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:45,629 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 03:58:45,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:58:45,629 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:45,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1248812717, now seen corresponding path program 3 times [2024-06-28 03:58:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:45,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562132945] [2024-06-28 03:58:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:45,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562132945] [2024-06-28 03:58:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562132945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:47,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:47,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:47,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132925245] [2024-06-28 03:58:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:47,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:47,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:47,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 483 transitions, 7960 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:47,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:47,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:47,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:49,575 INFO L124 PetriNetUnfolderBase]: 4478/6906 cut-off events. [2024-06-28 03:58:49,575 INFO L125 PetriNetUnfolderBase]: For 680896/680922 co-relation queries the response was YES. [2024-06-28 03:58:49,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64978 conditions, 6906 events. 4478/6906 cut-off events. For 680896/680922 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39572 event pairs, 998 based on Foata normal form. 28/6932 useless extension candidates. Maximal degree in co-relation 64837. Up to 6789 conditions per place. [2024-06-28 03:58:49,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 44 changer transitions 0/508 dead transitions. [2024-06-28 03:58:49,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 508 transitions, 9123 flow [2024-06-28 03:58:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 03:58:49,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 03:58:49,658 INFO L175 Difference]: Start difference. First operand has 285 places, 483 transitions, 7960 flow. Second operand 8 states and 121 transitions. [2024-06-28 03:58:49,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 508 transitions, 9123 flow [2024-06-28 03:58:50,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 508 transitions, 8969 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-28 03:58:50,869 INFO L231 Difference]: Finished difference. Result has 288 places, 486 transitions, 7979 flow [2024-06-28 03:58:50,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7979, PETRI_PLACES=288, PETRI_TRANSITIONS=486} [2024-06-28 03:58:50,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 03:58:50,870 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 486 transitions, 7979 flow [2024-06-28 03:58:50,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:50,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:50,870 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 03:58:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:58:50,870 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1855755048, now seen corresponding path program 3 times [2024-06-28 03:58:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724321982] [2024-06-28 03:58:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:52,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724321982] [2024-06-28 03:58:52,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724321982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:52,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:52,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:58:52,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217218939] [2024-06-28 03:58:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:52,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:58:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:58:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:58:52,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:52,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 486 transitions, 7979 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:52,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:52,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:52,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:55,522 INFO L124 PetriNetUnfolderBase]: 4469/6900 cut-off events. [2024-06-28 03:58:55,522 INFO L125 PetriNetUnfolderBase]: For 693728/693792 co-relation queries the response was YES. [2024-06-28 03:58:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64859 conditions, 6900 events. 4469/6900 cut-off events. For 693728/693792 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39620 event pairs, 985 based on Foata normal form. 49/6945 useless extension candidates. Maximal degree in co-relation 64717. Up to 6510 conditions per place. [2024-06-28 03:58:55,598 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 78 changer transitions 0/511 dead transitions. [2024-06-28 03:58:55,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 511 transitions, 9387 flow [2024-06-28 03:58:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:58:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:58:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:58:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:58:55,600 INFO L175 Difference]: Start difference. First operand has 288 places, 486 transitions, 7979 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:58:55,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 511 transitions, 9387 flow [2024-06-28 03:58:56,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 511 transitions, 9215 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 03:58:56,935 INFO L231 Difference]: Finished difference. Result has 289 places, 486 transitions, 7973 flow [2024-06-28 03:58:56,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7973, PETRI_PLACES=289, PETRI_TRANSITIONS=486} [2024-06-28 03:58:56,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 03:58:56,936 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 486 transitions, 7973 flow [2024-06-28 03:58:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:56,936 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 03:58:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:58:56,937 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:56,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1387321244, now seen corresponding path program 4 times [2024-06-28 03:58:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674504186] [2024-06-28 03:58:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674504186] [2024-06-28 03:58:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674504186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:59,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:59,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:58:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660142844] [2024-06-28 03:58:59,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:58:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:58:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:58:59,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:58:59,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 486 transitions, 7973 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:59,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:59,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:58:59,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:01,585 INFO L124 PetriNetUnfolderBase]: 4430/6845 cut-off events. [2024-06-28 03:59:01,585 INFO L125 PetriNetUnfolderBase]: For 698935/698935 co-relation queries the response was YES. [2024-06-28 03:59:01,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64044 conditions, 6845 events. 4430/6845 cut-off events. For 698935/698935 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39246 event pairs, 963 based on Foata normal form. 9/6852 useless extension candidates. Maximal degree in co-relation 63901. Up to 6667 conditions per place. [2024-06-28 03:59:01,683 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 42 changer transitions 0/509 dead transitions. [2024-06-28 03:59:01,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 509 transitions, 9098 flow [2024-06-28 03:59:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:59:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:59:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-28 03:59:01,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-28 03:59:01,685 INFO L175 Difference]: Start difference. First operand has 289 places, 486 transitions, 7973 flow. Second operand 9 states and 132 transitions. [2024-06-28 03:59:01,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 509 transitions, 9098 flow [2024-06-28 03:59:03,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 509 transitions, 8880 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:03,191 INFO L231 Difference]: Finished difference. Result has 293 places, 486 transitions, 7854 flow [2024-06-28 03:59:03,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7854, PETRI_PLACES=293, PETRI_TRANSITIONS=486} [2024-06-28 03:59:03,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:59:03,191 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 486 transitions, 7854 flow [2024-06-28 03:59:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:03,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:03,192 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 03:59:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:59:03,192 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:03,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 957525852, now seen corresponding path program 5 times [2024-06-28 03:59:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500486171] [2024-06-28 03:59:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:05,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:05,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500486171] [2024-06-28 03:59:05,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500486171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:05,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:05,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335333782] [2024-06-28 03:59:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:05,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:05,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 486 transitions, 7854 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:07,737 INFO L124 PetriNetUnfolderBase]: 4419/6833 cut-off events. [2024-06-28 03:59:07,738 INFO L125 PetriNetUnfolderBase]: For 692795/692821 co-relation queries the response was YES. [2024-06-28 03:59:07,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63340 conditions, 6833 events. 4419/6833 cut-off events. For 692795/692821 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39273 event pairs, 914 based on Foata normal form. 35/6866 useless extension candidates. Maximal degree in co-relation 63196. Up to 6356 conditions per place. [2024-06-28 03:59:07,822 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 103 changer transitions 0/527 dead transitions. [2024-06-28 03:59:07,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 527 transitions, 9282 flow [2024-06-28 03:59:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:59:07,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:59:07,823 INFO L175 Difference]: Start difference. First operand has 293 places, 486 transitions, 7854 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:59:07,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 527 transitions, 9282 flow [2024-06-28 03:59:08,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 527 transitions, 9188 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:08,866 INFO L231 Difference]: Finished difference. Result has 293 places, 489 transitions, 8085 flow [2024-06-28 03:59:08,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8085, PETRI_PLACES=293, PETRI_TRANSITIONS=489} [2024-06-28 03:59:08,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:59:08,866 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 489 transitions, 8085 flow [2024-06-28 03:59:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:08,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:08,867 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 03:59:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:59:08,867 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:08,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 957376122, now seen corresponding path program 6 times [2024-06-28 03:59:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635145783] [2024-06-28 03:59:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635145783] [2024-06-28 03:59:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635145783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318110045] [2024-06-28 03:59:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:10,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:10,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 489 transitions, 8085 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:12,821 INFO L124 PetriNetUnfolderBase]: 4398/6799 cut-off events. [2024-06-28 03:59:12,822 INFO L125 PetriNetUnfolderBase]: For 683520/683548 co-relation queries the response was YES. [2024-06-28 03:59:12,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63438 conditions, 6799 events. 4398/6799 cut-off events. For 683520/683548 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39018 event pairs, 930 based on Foata normal form. 31/6828 useless extension candidates. Maximal degree in co-relation 63294. Up to 6338 conditions per place. [2024-06-28 03:59:12,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 104 changer transitions 0/522 dead transitions. [2024-06-28 03:59:12,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 522 transitions, 9265 flow [2024-06-28 03:59:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:59:12,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 03:59:12,918 INFO L175 Difference]: Start difference. First operand has 293 places, 489 transitions, 8085 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:59:12,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 522 transitions, 9265 flow [2024-06-28 03:59:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 522 transitions, 8975 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-28 03:59:14,410 INFO L231 Difference]: Finished difference. Result has 293 places, 489 transitions, 8026 flow [2024-06-28 03:59:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8026, PETRI_PLACES=293, PETRI_TRANSITIONS=489} [2024-06-28 03:59:14,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:59:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 489 transitions, 8026 flow [2024-06-28 03:59:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:14,411 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 03:59:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:59:14,412 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1595984619, now seen corresponding path program 4 times [2024-06-28 03:59:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916349231] [2024-06-28 03:59:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:16,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:16,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916349231] [2024-06-28 03:59:16,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916349231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:16,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:16,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113351239] [2024-06-28 03:59:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:16,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:16,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 489 transitions, 8026 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:16,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:16,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:18,153 INFO L124 PetriNetUnfolderBase]: 4400/6799 cut-off events. [2024-06-28 03:59:18,153 INFO L125 PetriNetUnfolderBase]: For 662212/662238 co-relation queries the response was YES. [2024-06-28 03:59:18,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63020 conditions, 6799 events. 4400/6799 cut-off events. For 662212/662238 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39016 event pairs, 982 based on Foata normal form. 28/6825 useless extension candidates. Maximal degree in co-relation 62877. Up to 6701 conditions per place. [2024-06-28 03:59:18,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 34 changer transitions 0/512 dead transitions. [2024-06-28 03:59:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 512 transitions, 9193 flow [2024-06-28 03:59:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 03:59:18,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 03:59:18,247 INFO L175 Difference]: Start difference. First operand has 293 places, 489 transitions, 8026 flow. Second operand 7 states and 108 transitions. [2024-06-28 03:59:18,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 512 transitions, 9193 flow [2024-06-28 03:59:19,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 512 transitions, 8876 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:19,396 INFO L231 Difference]: Finished difference. Result has 292 places, 492 transitions, 7870 flow [2024-06-28 03:59:19,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7709, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7870, PETRI_PLACES=292, PETRI_TRANSITIONS=492} [2024-06-28 03:59:19,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 03:59:19,397 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 492 transitions, 7870 flow [2024-06-28 03:59:19,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:19,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:19,397 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 03:59:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:59:19,398 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:19,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1595996120, now seen corresponding path program 4 times [2024-06-28 03:59:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:19,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674914019] [2024-06-28 03:59:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:21,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:21,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674914019] [2024-06-28 03:59:21,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674914019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:21,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:21,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151195284] [2024-06-28 03:59:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:21,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:21,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:21,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 492 transitions, 7870 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:21,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:21,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:21,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:23,452 INFO L124 PetriNetUnfolderBase]: 4417/6825 cut-off events. [2024-06-28 03:59:23,453 INFO L125 PetriNetUnfolderBase]: For 661664/661692 co-relation queries the response was YES. [2024-06-28 03:59:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62790 conditions, 6825 events. 4417/6825 cut-off events. For 661664/661692 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 39204 event pairs, 923 based on Foata normal form. 29/6852 useless extension candidates. Maximal degree in co-relation 62647. Up to 6559 conditions per place. [2024-06-28 03:59:23,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 97 changer transitions 0/536 dead transitions. [2024-06-28 03:59:23,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 536 transitions, 9367 flow [2024-06-28 03:59:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:59:23,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 03:59:23,551 INFO L175 Difference]: Start difference. First operand has 292 places, 492 transitions, 7870 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:59:23,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 536 transitions, 9367 flow [2024-06-28 03:59:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 536 transitions, 9157 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:24,822 INFO L231 Difference]: Finished difference. Result has 295 places, 498 transitions, 8093 flow [2024-06-28 03:59:24,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7660, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8093, PETRI_PLACES=295, PETRI_TRANSITIONS=498} [2024-06-28 03:59:24,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 03:59:24,823 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 498 transitions, 8093 flow [2024-06-28 03:59:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:24,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:24,824 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 03:59:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:59:24,824 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:24,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 957372495, now seen corresponding path program 5 times [2024-06-28 03:59:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540468174] [2024-06-28 03:59:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:26,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540468174] [2024-06-28 03:59:26,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540468174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:26,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:26,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016090253] [2024-06-28 03:59:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:26,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 498 transitions, 8093 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:59:26,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:28,785 INFO L124 PetriNetUnfolderBase]: 4411/6815 cut-off events. [2024-06-28 03:59:28,785 INFO L125 PetriNetUnfolderBase]: For 671558/671584 co-relation queries the response was YES. [2024-06-28 03:59:28,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63599 conditions, 6815 events. 4411/6815 cut-off events. For 671558/671584 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39082 event pairs, 949 based on Foata normal form. 28/6841 useless extension candidates. Maximal degree in co-relation 63454. Up to 6648 conditions per place. [2024-06-28 03:59:28,883 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 63 changer transitions 0/527 dead transitions. [2024-06-28 03:59:28,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 527 transitions, 9248 flow [2024-06-28 03:59:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:59:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:59:28,885 INFO L175 Difference]: Start difference. First operand has 295 places, 498 transitions, 8093 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:59:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 527 transitions, 9248 flow [2024-06-28 03:59:30,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 527 transitions, 9049 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 03:59:30,292 INFO L231 Difference]: Finished difference. Result has 298 places, 498 transitions, 8026 flow [2024-06-28 03:59:30,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8026, PETRI_PLACES=298, PETRI_TRANSITIONS=498} [2024-06-28 03:59:30,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-28 03:59:30,293 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 498 transitions, 8026 flow [2024-06-28 03:59:30,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 03:59:30,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:30,293 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 03:59:30,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:59:30,293 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:30,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1581390653, now seen corresponding path program 1 times [2024-06-28 03:59:30,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:30,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221897524] [2024-06-28 03:59:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:30,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:32,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221897524] [2024-06-28 03:59:32,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221897524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:32,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:32,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366405692] [2024-06-28 03:59:32,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:32,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:32,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:32,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 498 transitions, 8026 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:32,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:32,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:32,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:35,108 INFO L124 PetriNetUnfolderBase]: 4483/6919 cut-off events. [2024-06-28 03:59:35,108 INFO L125 PetriNetUnfolderBase]: For 718740/718804 co-relation queries the response was YES. [2024-06-28 03:59:35,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64719 conditions, 6919 events. 4483/6919 cut-off events. For 718740/718804 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39747 event pairs, 923 based on Foata normal form. 54/6969 useless extension candidates. Maximal degree in co-relation 64573. Up to 6186 conditions per place. [2024-06-28 03:59:35,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 416 selfloop transitions, 121 changer transitions 0/540 dead transitions. [2024-06-28 03:59:35,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 540 transitions, 9812 flow [2024-06-28 03:59:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:59:35,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:59:35,202 INFO L175 Difference]: Start difference. First operand has 298 places, 498 transitions, 8026 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:59:35,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 540 transitions, 9812 flow [2024-06-28 03:59:36,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 540 transitions, 9603 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 03:59:36,567 INFO L231 Difference]: Finished difference. Result has 301 places, 510 transitions, 8421 flow [2024-06-28 03:59:36,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7817, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8421, PETRI_PLACES=301, PETRI_TRANSITIONS=510} [2024-06-28 03:59:36,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-28 03:59:36,568 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 510 transitions, 8421 flow [2024-06-28 03:59:36,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:36,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:59:36,569 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1577671583, now seen corresponding path program 2 times [2024-06-28 03:59:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161535990] [2024-06-28 03:59:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:38,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161535990] [2024-06-28 03:59:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161535990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209502467] [2024-06-28 03:59:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:38,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:38,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 510 transitions, 8421 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:38,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:38,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:38,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:41,052 INFO L124 PetriNetUnfolderBase]: 4603/7084 cut-off events. [2024-06-28 03:59:41,052 INFO L125 PetriNetUnfolderBase]: For 774862/774862 co-relation queries the response was YES. [2024-06-28 03:59:41,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68342 conditions, 7084 events. 4603/7084 cut-off events. For 774862/774862 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40660 event pairs, 991 based on Foata normal form. 8/7090 useless extension candidates. Maximal degree in co-relation 68194. Up to 6809 conditions per place. [2024-06-28 03:59:41,156 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 495 selfloop transitions, 51 changer transitions 0/549 dead transitions. [2024-06-28 03:59:41,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 549 transitions, 10244 flow [2024-06-28 03:59:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:59:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:59:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 03:59:41,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 03:59:41,158 INFO L175 Difference]: Start difference. First operand has 301 places, 510 transitions, 8421 flow. Second operand 9 states and 140 transitions. [2024-06-28 03:59:41,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 549 transitions, 10244 flow [2024-06-28 03:59:42,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 549 transitions, 10090 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:42,873 INFO L231 Difference]: Finished difference. Result has 308 places, 521 transitions, 8689 flow [2024-06-28 03:59:42,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8689, PETRI_PLACES=308, PETRI_TRANSITIONS=521} [2024-06-28 03:59:42,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-28 03:59:42,874 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 521 transitions, 8689 flow [2024-06-28 03:59:42,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:42,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:42,874 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 03:59:42,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:59:42,874 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:42,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1943332577, now seen corresponding path program 3 times [2024-06-28 03:59:42,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500096871] [2024-06-28 03:59:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:45,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:45,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500096871] [2024-06-28 03:59:45,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500096871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:45,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:45,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:45,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044331996] [2024-06-28 03:59:45,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:45,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:45,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:45,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:45,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 521 transitions, 8689 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:45,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:45,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:47,923 INFO L124 PetriNetUnfolderBase]: 4691/7207 cut-off events. [2024-06-28 03:59:47,924 INFO L125 PetriNetUnfolderBase]: For 809583/809585 co-relation queries the response was YES. [2024-06-28 03:59:47,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69671 conditions, 7207 events. 4691/7207 cut-off events. For 809583/809585 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41412 event pairs, 1018 based on Foata normal form. 10/7215 useless extension candidates. Maximal degree in co-relation 69520. Up to 6709 conditions per place. [2024-06-28 03:59:48,018 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 88 changer transitions 0/559 dead transitions. [2024-06-28 03:59:48,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 559 transitions, 10679 flow [2024-06-28 03:59:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:59:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:59:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-28 03:59:48,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-06-28 03:59:48,020 INFO L175 Difference]: Start difference. First operand has 308 places, 521 transitions, 8689 flow. Second operand 11 states and 158 transitions. [2024-06-28 03:59:48,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 559 transitions, 10679 flow [2024-06-28 03:59:49,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 559 transitions, 10568 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 03:59:49,561 INFO L231 Difference]: Finished difference. Result has 316 places, 531 transitions, 9061 flow [2024-06-28 03:59:49,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9061, PETRI_PLACES=316, PETRI_TRANSITIONS=531} [2024-06-28 03:59:49,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 03:59:49,562 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 531 transitions, 9061 flow [2024-06-28 03:59:49,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:49,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:49,563 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 03:59:49,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:59:49,563 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:49,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash -234118573, now seen corresponding path program 1 times [2024-06-28 03:59:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643817323] [2024-06-28 03:59:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:49,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643817323] [2024-06-28 03:59:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643817323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:52,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:52,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:52,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976285809] [2024-06-28 03:59:52,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:52,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:52,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:52,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:52,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 531 transitions, 9061 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:52,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:52,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:52,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:54,529 INFO L124 PetriNetUnfolderBase]: 4696/7209 cut-off events. [2024-06-28 03:59:54,530 INFO L125 PetriNetUnfolderBase]: For 804089/804109 co-relation queries the response was YES. [2024-06-28 03:59:54,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70232 conditions, 7209 events. 4696/7209 cut-off events. For 804089/804109 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41376 event pairs, 1025 based on Foata normal form. 21/7228 useless extension candidates. Maximal degree in co-relation 70078. Up to 7001 conditions per place. [2024-06-28 03:59:54,621 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 52 changer transitions 0/570 dead transitions. [2024-06-28 03:59:54,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 570 transitions, 10604 flow [2024-06-28 03:59:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:59:54,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:59:54,623 INFO L175 Difference]: Start difference. First operand has 316 places, 531 transitions, 9061 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:59:54,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 570 transitions, 10604 flow [2024-06-28 03:59:56,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 570 transitions, 10218 flow, removed 114 selfloop flow, removed 10 redundant places. [2024-06-28 03:59:56,604 INFO L231 Difference]: Finished difference. Result has 314 places, 537 transitions, 8927 flow [2024-06-28 03:59:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8675, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8927, PETRI_PLACES=314, PETRI_TRANSITIONS=537} [2024-06-28 03:59:56,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 03:59:56,605 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 537 transitions, 8927 flow [2024-06-28 03:59:56,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:56,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:56,605 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 03:59:56,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:59:56,606 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:56,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -228404653, now seen corresponding path program 2 times [2024-06-28 03:59:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997114179] [2024-06-28 03:59:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:56,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997114179] [2024-06-28 03:59:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997114179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:59,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:59,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500654542] [2024-06-28 03:59:59,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:59,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 03:59:59,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 537 transitions, 8927 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:59,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:59,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 03:59:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:01,368 INFO L124 PetriNetUnfolderBase]: 4701/7216 cut-off events. [2024-06-28 04:00:01,368 INFO L125 PetriNetUnfolderBase]: For 818823/818843 co-relation queries the response was YES. [2024-06-28 04:00:01,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69635 conditions, 7216 events. 4701/7216 cut-off events. For 818823/818843 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41448 event pairs, 1025 based on Foata normal form. 21/7235 useless extension candidates. Maximal degree in co-relation 69487. Up to 7051 conditions per place. [2024-06-28 04:00:01,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 52 changer transitions 0/568 dead transitions. [2024-06-28 04:00:01,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 568 transitions, 10224 flow [2024-06-28 04:00:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:00:01,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 04:00:01,453 INFO L175 Difference]: Start difference. First operand has 314 places, 537 transitions, 8927 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:00:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 568 transitions, 10224 flow [2024-06-28 04:00:03,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 568 transitions, 10057 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-28 04:00:03,167 INFO L231 Difference]: Finished difference. Result has 318 places, 540 transitions, 8950 flow [2024-06-28 04:00:03,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8786, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8950, PETRI_PLACES=318, PETRI_TRANSITIONS=540} [2024-06-28 04:00:03,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 04:00:03,168 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 540 transitions, 8950 flow [2024-06-28 04:00:03,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:03,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:03,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:03,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:00:03,168 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:03,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash -236978509, now seen corresponding path program 1 times [2024-06-28 04:00:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801163310] [2024-06-28 04:00:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:03,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:05,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:05,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801163310] [2024-06-28 04:00:05,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801163310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:05,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:05,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:05,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231380580] [2024-06-28 04:00:05,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:05,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:05,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 540 transitions, 8950 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:05,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:07,816 INFO L124 PetriNetUnfolderBase]: 4709/7231 cut-off events. [2024-06-28 04:00:07,816 INFO L125 PetriNetUnfolderBase]: For 839443/839467 co-relation queries the response was YES. [2024-06-28 04:00:07,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69994 conditions, 7231 events. 4709/7231 cut-off events. For 839443/839467 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41469 event pairs, 866 based on Foata normal form. 24/7253 useless extension candidates. Maximal degree in co-relation 69844. Up to 6841 conditions per place. [2024-06-28 04:00:07,915 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 503 selfloop transitions, 82 changer transitions 0/588 dead transitions. [2024-06-28 04:00:07,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 588 transitions, 10529 flow [2024-06-28 04:00:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:00:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:00:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:00:07,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 04:00:07,917 INFO L175 Difference]: Start difference. First operand has 318 places, 540 transitions, 8950 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:00:07,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 588 transitions, 10529 flow [2024-06-28 04:00:09,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 588 transitions, 10393 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:09,722 INFO L231 Difference]: Finished difference. Result has 321 places, 544 transitions, 9083 flow [2024-06-28 04:00:09,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9083, PETRI_PLACES=321, PETRI_TRANSITIONS=544} [2024-06-28 04:00:09,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-28 04:00:09,723 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 544 transitions, 9083 flow [2024-06-28 04:00:09,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:09,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:09,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:00:09,724 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:09,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash -236739189, now seen corresponding path program 1 times [2024-06-28 04:00:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:09,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608653418] [2024-06-28 04:00:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:12,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:12,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608653418] [2024-06-28 04:00:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608653418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:12,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413215135] [2024-06-28 04:00:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:12,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:12,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 544 transitions, 9083 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:12,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:12,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:12,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:15,168 INFO L124 PetriNetUnfolderBase]: 4732/7263 cut-off events. [2024-06-28 04:00:15,168 INFO L125 PetriNetUnfolderBase]: For 862183/862207 co-relation queries the response was YES. [2024-06-28 04:00:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70860 conditions, 7263 events. 4732/7263 cut-off events. For 862183/862207 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41816 event pairs, 1000 based on Foata normal form. 24/7285 useless extension candidates. Maximal degree in co-relation 70709. Up to 6887 conditions per place. [2024-06-28 04:00:15,256 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 465 selfloop transitions, 130 changer transitions 0/598 dead transitions. [2024-06-28 04:00:15,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 598 transitions, 10796 flow [2024-06-28 04:00:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:00:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:00:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-28 04:00:15,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-28 04:00:15,258 INFO L175 Difference]: Start difference. First operand has 321 places, 544 transitions, 9083 flow. Second operand 11 states and 172 transitions. [2024-06-28 04:00:15,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 598 transitions, 10796 flow [2024-06-28 04:00:17,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 598 transitions, 10634 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:00:17,492 INFO L231 Difference]: Finished difference. Result has 328 places, 553 transitions, 9443 flow [2024-06-28 04:00:17,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8921, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9443, PETRI_PLACES=328, PETRI_TRANSITIONS=553} [2024-06-28 04:00:17,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-28 04:00:17,493 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 553 transitions, 9443 flow [2024-06-28 04:00:17,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:17,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:17,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:17,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:00:17,493 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:17,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash -236739499, now seen corresponding path program 2 times [2024-06-28 04:00:17,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:17,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569255000] [2024-06-28 04:00:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:17,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:20,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:20,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569255000] [2024-06-28 04:00:20,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569255000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:20,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:20,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384102428] [2024-06-28 04:00:20,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:20,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:20,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:20,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 553 transitions, 9443 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:20,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:20,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:20,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:23,155 INFO L124 PetriNetUnfolderBase]: 4740/7275 cut-off events. [2024-06-28 04:00:23,155 INFO L125 PetriNetUnfolderBase]: For 884342/884366 co-relation queries the response was YES. [2024-06-28 04:00:23,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71889 conditions, 7275 events. 4740/7275 cut-off events. For 884342/884366 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41833 event pairs, 999 based on Foata normal form. 24/7297 useless extension candidates. Maximal degree in co-relation 71735. Up to 6986 conditions per place. [2024-06-28 04:00:23,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 94 changer transitions 0/594 dead transitions. [2024-06-28 04:00:23,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 594 transitions, 10784 flow [2024-06-28 04:00:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:00:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:00:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-28 04:00:23,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-28 04:00:23,242 INFO L175 Difference]: Start difference. First operand has 328 places, 553 transitions, 9443 flow. Second operand 10 states and 153 transitions. [2024-06-28 04:00:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 594 transitions, 10784 flow [2024-06-28 04:00:25,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 594 transitions, 10586 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 04:00:25,137 INFO L231 Difference]: Finished difference. Result has 331 places, 555 transitions, 9473 flow [2024-06-28 04:00:25,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9473, PETRI_PLACES=331, PETRI_TRANSITIONS=555} [2024-06-28 04:00:25,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 04:00:25,138 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 555 transitions, 9473 flow [2024-06-28 04:00:25,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:25,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:25,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:25,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:00:25,139 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:25,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash -118827403, now seen corresponding path program 3 times [2024-06-28 04:00:25,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:25,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140001436] [2024-06-28 04:00:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140001436] [2024-06-28 04:00:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140001436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:27,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070021810] [2024-06-28 04:00:27,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:27,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 555 transitions, 9473 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:27,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:27,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:27,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:29,616 INFO L124 PetriNetUnfolderBase]: 4753/7297 cut-off events. [2024-06-28 04:00:29,616 INFO L125 PetriNetUnfolderBase]: For 904874/904898 co-relation queries the response was YES. [2024-06-28 04:00:29,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72520 conditions, 7297 events. 4753/7297 cut-off events. For 904874/904898 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42084 event pairs, 1009 based on Foata normal form. 25/7320 useless extension candidates. Maximal degree in co-relation 72364. Up to 6969 conditions per place. [2024-06-28 04:00:29,720 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 88 changer transitions 0/614 dead transitions. [2024-06-28 04:00:29,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 614 transitions, 11829 flow [2024-06-28 04:00:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:00:29,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:00:29,722 INFO L175 Difference]: Start difference. First operand has 331 places, 555 transitions, 9473 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:00:29,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 614 transitions, 11829 flow [2024-06-28 04:00:31,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 614 transitions, 11619 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 04:00:31,746 INFO L231 Difference]: Finished difference. Result has 334 places, 582 transitions, 10107 flow [2024-06-28 04:00:31,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9263, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10107, PETRI_PLACES=334, PETRI_TRANSITIONS=582} [2024-06-28 04:00:31,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-28 04:00:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 582 transitions, 10107 flow [2024-06-28 04:00:31,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:31,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:31,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:31,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:00:31,748 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:31,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash -118528501, now seen corresponding path program 1 times [2024-06-28 04:00:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:31,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507710773] [2024-06-28 04:00:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507710773] [2024-06-28 04:00:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507710773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:33,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:33,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226858068] [2024-06-28 04:00:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:33,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:33,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 582 transitions, 10107 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:33,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:36,555 INFO L124 PetriNetUnfolderBase]: 4795/7356 cut-off events. [2024-06-28 04:00:36,555 INFO L125 PetriNetUnfolderBase]: For 950783/950807 co-relation queries the response was YES. [2024-06-28 04:00:36,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74667 conditions, 7356 events. 4795/7356 cut-off events. For 950783/950807 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42328 event pairs, 1006 based on Foata normal form. 22/7376 useless extension candidates. Maximal degree in co-relation 74507. Up to 6448 conditions per place. [2024-06-28 04:00:36,652 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 164 changer transitions 0/624 dead transitions. [2024-06-28 04:00:36,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 624 transitions, 12265 flow [2024-06-28 04:00:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:00:36,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:00:36,654 INFO L175 Difference]: Start difference. First operand has 334 places, 582 transitions, 10107 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:00:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 624 transitions, 12265 flow [2024-06-28 04:00:38,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 624 transitions, 12088 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 04:00:38,434 INFO L231 Difference]: Finished difference. Result has 339 places, 591 transitions, 10520 flow [2024-06-28 04:00:38,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9930, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10520, PETRI_PLACES=339, PETRI_TRANSITIONS=591} [2024-06-28 04:00:38,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 04:00:38,434 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 591 transitions, 10520 flow [2024-06-28 04:00:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:38,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:38,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:00:38,435 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:38,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash -118528873, now seen corresponding path program 4 times [2024-06-28 04:00:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735542623] [2024-06-28 04:00:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:40,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:40,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735542623] [2024-06-28 04:00:40,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735542623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:40,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:40,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228823837] [2024-06-28 04:00:40,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 591 transitions, 10520 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:40,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:43,058 INFO L124 PetriNetUnfolderBase]: 4824/7396 cut-off events. [2024-06-28 04:00:43,058 INFO L125 PetriNetUnfolderBase]: For 970468/970498 co-relation queries the response was YES. [2024-06-28 04:00:43,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75899 conditions, 7396 events. 4824/7396 cut-off events. For 970468/970498 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 42644 event pairs, 1008 based on Foata normal form. 25/7418 useless extension candidates. Maximal degree in co-relation 75737. Up to 7096 conditions per place. [2024-06-28 04:00:43,362 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 544 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-28 04:00:43,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 630 transitions, 12516 flow [2024-06-28 04:00:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:00:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:00:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:00:43,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-28 04:00:43,363 INFO L175 Difference]: Start difference. First operand has 339 places, 591 transitions, 10520 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:00:43,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 630 transitions, 12516 flow [2024-06-28 04:00:45,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 630 transitions, 12170 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-28 04:00:45,521 INFO L231 Difference]: Finished difference. Result has 347 places, 606 transitions, 10741 flow [2024-06-28 04:00:45,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10185, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10741, PETRI_PLACES=347, PETRI_TRANSITIONS=606} [2024-06-28 04:00:45,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 04:00:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 606 transitions, 10741 flow [2024-06-28 04:00:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:45,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:45,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:45,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:00:45,523 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:45,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:45,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1349363877, now seen corresponding path program 1 times [2024-06-28 04:00:45,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:45,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544901518] [2024-06-28 04:00:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:47,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:47,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544901518] [2024-06-28 04:00:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544901518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:47,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259075067] [2024-06-28 04:00:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:47,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:47,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:47,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 606 transitions, 10741 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:47,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:47,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:47,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:50,639 INFO L124 PetriNetUnfolderBase]: 4834/7409 cut-off events. [2024-06-28 04:00:50,639 INFO L125 PetriNetUnfolderBase]: For 992341/992365 co-relation queries the response was YES. [2024-06-28 04:00:50,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75856 conditions, 7409 events. 4834/7409 cut-off events. For 992341/992365 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42712 event pairs, 1026 based on Foata normal form. 22/7429 useless extension candidates. Maximal degree in co-relation 75690. Up to 7012 conditions per place. [2024-06-28 04:00:50,750 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 120 changer transitions 0/638 dead transitions. [2024-06-28 04:00:50,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 638 transitions, 12570 flow [2024-06-28 04:00:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:00:50,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 04:00:50,752 INFO L175 Difference]: Start difference. First operand has 347 places, 606 transitions, 10741 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:00:50,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 638 transitions, 12570 flow [2024-06-28 04:00:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 638 transitions, 12393 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:00:53,508 INFO L231 Difference]: Finished difference. Result has 350 places, 611 transitions, 10924 flow [2024-06-28 04:00:53,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10567, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10924, PETRI_PLACES=350, PETRI_TRANSITIONS=611} [2024-06-28 04:00:53,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 04:00:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 611 transitions, 10924 flow [2024-06-28 04:00:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:53,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:00:53,510 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 398536583, now seen corresponding path program 2 times [2024-06-28 04:00:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:53,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569822101] [2024-06-28 04:00:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569822101] [2024-06-28 04:00:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569822101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:55,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:55,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264222340] [2024-06-28 04:00:55,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:55,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:55,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:00:55,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 611 transitions, 10924 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:55,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:55,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:00:55,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:58,599 INFO L124 PetriNetUnfolderBase]: 4876/7467 cut-off events. [2024-06-28 04:00:58,599 INFO L125 PetriNetUnfolderBase]: For 1034432/1034456 co-relation queries the response was YES. [2024-06-28 04:00:58,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77139 conditions, 7467 events. 4876/7467 cut-off events. For 1034432/1034456 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42939 event pairs, 1042 based on Foata normal form. 22/7487 useless extension candidates. Maximal degree in co-relation 76972. Up to 6501 conditions per place. [2024-06-28 04:00:58,692 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 186 changer transitions 0/647 dead transitions. [2024-06-28 04:00:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 647 transitions, 13058 flow [2024-06-28 04:00:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:00:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:00:58,693 INFO L175 Difference]: Start difference. First operand has 350 places, 611 transitions, 10924 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:00:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 647 transitions, 13058 flow [2024-06-28 04:01:01,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 647 transitions, 12829 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:01,020 INFO L231 Difference]: Finished difference. Result has 353 places, 617 transitions, 11246 flow [2024-06-28 04:01:01,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10695, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11246, PETRI_PLACES=353, PETRI_TRANSITIONS=617} [2024-06-28 04:01:01,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-28 04:01:01,021 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 617 transitions, 11246 flow [2024-06-28 04:01:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:01,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:01,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:01:01,022 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:01,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 58482677, now seen corresponding path program 5 times [2024-06-28 04:01:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782112786] [2024-06-28 04:01:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782112786] [2024-06-28 04:01:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782112786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:03,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:03,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316629423] [2024-06-28 04:01:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:03,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:03,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 617 transitions, 11246 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:03,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:05,770 INFO L124 PetriNetUnfolderBase]: 4881/7469 cut-off events. [2024-06-28 04:01:05,771 INFO L125 PetriNetUnfolderBase]: For 1050811/1050831 co-relation queries the response was YES. [2024-06-28 04:01:05,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77891 conditions, 7469 events. 4881/7469 cut-off events. For 1050811/1050831 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43007 event pairs, 1021 based on Foata normal form. 21/7488 useless extension candidates. Maximal degree in co-relation 77722. Up to 7370 conditions per place. [2024-06-28 04:01:05,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 33 changer transitions 0/640 dead transitions. [2024-06-28 04:01:05,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 640 transitions, 12638 flow [2024-06-28 04:01:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-28 04:01:05,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-28 04:01:05,887 INFO L175 Difference]: Start difference. First operand has 353 places, 617 transitions, 11246 flow. Second operand 8 states and 115 transitions. [2024-06-28 04:01:05,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 640 transitions, 12638 flow [2024-06-28 04:01:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 640 transitions, 12265 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-28 04:01:08,292 INFO L231 Difference]: Finished difference. Result has 357 places, 620 transitions, 11005 flow [2024-06-28 04:01:08,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10873, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11005, PETRI_PLACES=357, PETRI_TRANSITIONS=620} [2024-06-28 04:01:08,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 04:01:08,293 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 620 transitions, 11005 flow [2024-06-28 04:01:08,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:08,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:08,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:08,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:01:08,294 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:08,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash -737607737, now seen corresponding path program 6 times [2024-06-28 04:01:08,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:08,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209208936] [2024-06-28 04:01:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209208936] [2024-06-28 04:01:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209208936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526510587] [2024-06-28 04:01:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:10,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:10,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:10,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 620 transitions, 11005 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:10,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:10,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:10,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:13,117 INFO L124 PetriNetUnfolderBase]: 4886/7481 cut-off events. [2024-06-28 04:01:13,117 INFO L125 PetriNetUnfolderBase]: For 1069391/1069415 co-relation queries the response was YES. [2024-06-28 04:01:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77208 conditions, 7481 events. 4886/7481 cut-off events. For 1069391/1069415 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43154 event pairs, 1037 based on Foata normal form. 21/7500 useless extension candidates. Maximal degree in co-relation 77038. Up to 7079 conditions per place. [2024-06-28 04:01:13,217 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 126 changer transitions 0/645 dead transitions. [2024-06-28 04:01:13,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 645 transitions, 12806 flow [2024-06-28 04:01:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:01:13,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:01:13,219 INFO L175 Difference]: Start difference. First operand has 357 places, 620 transitions, 11005 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:01:13,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 645 transitions, 12806 flow [2024-06-28 04:01:15,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 645 transitions, 12702 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 04:01:15,956 INFO L231 Difference]: Finished difference. Result has 359 places, 623 transitions, 11245 flow [2024-06-28 04:01:15,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10901, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11245, PETRI_PLACES=359, PETRI_TRANSITIONS=623} [2024-06-28 04:01:15,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 04:01:15,957 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 623 transitions, 11245 flow [2024-06-28 04:01:15,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:15,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:15,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:15,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:01:15,958 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:15,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:15,958 INFO L85 PathProgramCache]: Analyzing trace with hash 20197483, now seen corresponding path program 2 times [2024-06-28 04:01:15,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:15,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72043479] [2024-06-28 04:01:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:15,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:18,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72043479] [2024-06-28 04:01:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72043479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:18,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139204942] [2024-06-28 04:01:18,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:18,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:18,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:18,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:18,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 623 transitions, 11245 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:18,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:18,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:18,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:20,953 INFO L124 PetriNetUnfolderBase]: 4896/7495 cut-off events. [2024-06-28 04:01:20,953 INFO L125 PetriNetUnfolderBase]: For 1096670/1096694 co-relation queries the response was YES. [2024-06-28 04:01:21,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77854 conditions, 7495 events. 4896/7495 cut-off events. For 1096670/1096694 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43199 event pairs, 1019 based on Foata normal form. 22/7515 useless extension candidates. Maximal degree in co-relation 77683. Up to 7094 conditions per place. [2024-06-28 04:01:21,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 128 changer transitions 0/653 dead transitions. [2024-06-28 04:01:21,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 653 transitions, 13128 flow [2024-06-28 04:01:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:01:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:01:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:01:21,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:01:21,079 INFO L175 Difference]: Start difference. First operand has 359 places, 623 transitions, 11245 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:01:21,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 653 transitions, 13128 flow [2024-06-28 04:01:23,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 653 transitions, 12894 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 04:01:23,806 INFO L231 Difference]: Finished difference. Result has 364 places, 628 transitions, 11399 flow [2024-06-28 04:01:23,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11021, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11399, PETRI_PLACES=364, PETRI_TRANSITIONS=628} [2024-06-28 04:01:23,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-28 04:01:23,807 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 628 transitions, 11399 flow [2024-06-28 04:01:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:23,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:23,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:01:23,807 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:23,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -910097255, now seen corresponding path program 3 times [2024-06-28 04:01:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:23,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865576875] [2024-06-28 04:01:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865576875] [2024-06-28 04:01:25,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865576875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:25,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:25,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:25,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564592016] [2024-06-28 04:01:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:25,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:25,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:25,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:25,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:25,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 628 transitions, 11399 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:25,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:25,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:25,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:28,934 INFO L124 PetriNetUnfolderBase]: 4890/7487 cut-off events. [2024-06-28 04:01:28,934 INFO L125 PetriNetUnfolderBase]: For 1110967/1110991 co-relation queries the response was YES. [2024-06-28 04:01:29,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77834 conditions, 7487 events. 4890/7487 cut-off events. For 1110967/1110991 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43089 event pairs, 1027 based on Foata normal form. 22/7507 useless extension candidates. Maximal degree in co-relation 77662. Up to 6518 conditions per place. [2024-06-28 04:01:29,032 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 185 changer transitions 0/659 dead transitions. [2024-06-28 04:01:29,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 659 transitions, 13417 flow [2024-06-28 04:01:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:01:29,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:01:29,034 INFO L175 Difference]: Start difference. First operand has 364 places, 628 transitions, 11399 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:01:29,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 659 transitions, 13417 flow [2024-06-28 04:01:31,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 659 transitions, 13161 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:31,722 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 11520 flow [2024-06-28 04:01:31,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11143, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11520, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-06-28 04:01:31,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-28 04:01:31,723 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 11520 flow [2024-06-28 04:01:31,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:31,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:31,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:01:31,723 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:31,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash 58480011, now seen corresponding path program 2 times [2024-06-28 04:01:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:31,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794519314] [2024-06-28 04:01:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:33,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:33,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794519314] [2024-06-28 04:01:33,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794519314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:33,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:33,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:33,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367217476] [2024-06-28 04:01:33,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:33,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:33,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:34,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:34,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 11520 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:34,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:34,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:34,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:36,739 INFO L124 PetriNetUnfolderBase]: 4916/7518 cut-off events. [2024-06-28 04:01:36,739 INFO L125 PetriNetUnfolderBase]: For 1141083/1141103 co-relation queries the response was YES. [2024-06-28 04:01:36,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79075 conditions, 7518 events. 4916/7518 cut-off events. For 1141083/1141103 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43243 event pairs, 1012 based on Foata normal form. 22/7538 useless extension candidates. Maximal degree in co-relation 78901. Up to 7372 conditions per place. [2024-06-28 04:01:36,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 603 selfloop transitions, 55 changer transitions 0/661 dead transitions. [2024-06-28 04:01:36,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 661 transitions, 13278 flow [2024-06-28 04:01:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:01:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:01:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-28 04:01:36,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-28 04:01:36,855 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 11520 flow. Second operand 10 states and 145 transitions. [2024-06-28 04:01:36,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 661 transitions, 13278 flow [2024-06-28 04:01:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 661 transitions, 12912 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:39,899 INFO L231 Difference]: Finished difference. Result has 372 places, 634 transitions, 11427 flow [2024-06-28 04:01:39,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11154, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11427, PETRI_PLACES=372, PETRI_TRANSITIONS=634} [2024-06-28 04:01:39,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-28 04:01:39,900 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 634 transitions, 11427 flow [2024-06-28 04:01:39,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:39,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:39,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:39,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:01:39,900 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:39,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 58849097, now seen corresponding path program 1 times [2024-06-28 04:01:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70372424] [2024-06-28 04:01:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70372424] [2024-06-28 04:01:42,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70372424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:42,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:42,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962353504] [2024-06-28 04:01:42,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:42,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:42,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:42,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:42,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 634 transitions, 11427 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:42,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:42,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:42,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:45,762 INFO L124 PetriNetUnfolderBase]: 4924/7530 cut-off events. [2024-06-28 04:01:45,763 INFO L125 PetriNetUnfolderBase]: For 1161032/1161052 co-relation queries the response was YES. [2024-06-28 04:01:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78742 conditions, 7530 events. 4924/7530 cut-off events. For 1161032/1161052 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43361 event pairs, 1022 based on Foata normal form. 22/7550 useless extension candidates. Maximal degree in co-relation 78567. Up to 7405 conditions per place. [2024-06-28 04:01:45,866 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 607 selfloop transitions, 47 changer transitions 0/657 dead transitions. [2024-06-28 04:01:45,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 657 transitions, 12863 flow [2024-06-28 04:01:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 04:01:45,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 04:01:45,867 INFO L175 Difference]: Start difference. First operand has 372 places, 634 transitions, 11427 flow. Second operand 8 states and 120 transitions. [2024-06-28 04:01:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 657 transitions, 12863 flow [2024-06-28 04:01:48,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 657 transitions, 12745 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 04:01:48,219 INFO L231 Difference]: Finished difference. Result has 374 places, 636 transitions, 11474 flow [2024-06-28 04:01:48,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11309, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11474, PETRI_PLACES=374, PETRI_TRANSITIONS=636} [2024-06-28 04:01:48,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 04:01:48,219 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 636 transitions, 11474 flow [2024-06-28 04:01:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:48,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:01:48,220 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:48,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 58836201, now seen corresponding path program 3 times [2024-06-28 04:01:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884631692] [2024-06-28 04:01:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884631692] [2024-06-28 04:01:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884631692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:50,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:50,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283703482] [2024-06-28 04:01:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:50,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:50,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:50,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 636 transitions, 11474 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:50,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:50,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:50,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:53,355 INFO L124 PetriNetUnfolderBase]: 4918/7522 cut-off events. [2024-06-28 04:01:53,355 INFO L125 PetriNetUnfolderBase]: For 1170982/1171002 co-relation queries the response was YES. [2024-06-28 04:01:53,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78785 conditions, 7522 events. 4918/7522 cut-off events. For 1170982/1171002 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43307 event pairs, 1001 based on Foata normal form. 22/7542 useless extension candidates. Maximal degree in co-relation 78608. Up to 7403 conditions per place. [2024-06-28 04:01:53,474 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 611 selfloop transitions, 45 changer transitions 0/659 dead transitions. [2024-06-28 04:01:53,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 659 transitions, 12868 flow [2024-06-28 04:01:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:01:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:01:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-28 04:01:53,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-28 04:01:53,476 INFO L175 Difference]: Start difference. First operand has 374 places, 636 transitions, 11474 flow. Second operand 9 states and 129 transitions. [2024-06-28 04:01:53,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 659 transitions, 12868 flow [2024-06-28 04:01:56,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 659 transitions, 12679 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 04:01:56,760 INFO L231 Difference]: Finished difference. Result has 377 places, 636 transitions, 11382 flow [2024-06-28 04:01:56,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11285, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11382, PETRI_PLACES=377, PETRI_TRANSITIONS=636} [2024-06-28 04:01:56,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-28 04:01:56,761 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 636 transitions, 11382 flow [2024-06-28 04:01:56,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:56,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:56,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:01:56,762 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:56,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 450738521, now seen corresponding path program 3 times [2024-06-28 04:01:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:56,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806541332] [2024-06-28 04:01:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:58,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:58,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806541332] [2024-06-28 04:01:58,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806541332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:58,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:58,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287991512] [2024-06-28 04:01:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:58,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:01:58,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 636 transitions, 11382 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:58,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:58,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:01:58,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:01,627 INFO L124 PetriNetUnfolderBase]: 4926/7534 cut-off events. [2024-06-28 04:02:01,627 INFO L125 PetriNetUnfolderBase]: For 1192436/1192456 co-relation queries the response was YES. [2024-06-28 04:02:01,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78916 conditions, 7534 events. 4926/7534 cut-off events. For 1192436/1192456 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43411 event pairs, 1021 based on Foata normal form. 22/7554 useless extension candidates. Maximal degree in co-relation 78738. Up to 7429 conditions per place. [2024-06-28 04:02:01,726 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 622 selfloop transitions, 35 changer transitions 0/660 dead transitions. [2024-06-28 04:02:01,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 660 transitions, 12798 flow [2024-06-28 04:02:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-28 04:02:01,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2024-06-28 04:02:01,728 INFO L175 Difference]: Start difference. First operand has 377 places, 636 transitions, 11382 flow. Second operand 9 states and 125 transitions. [2024-06-28 04:02:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 660 transitions, 12798 flow [2024-06-28 04:02:04,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 660 transitions, 12703 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:04,682 INFO L231 Difference]: Finished difference. Result has 379 places, 638 transitions, 11400 flow [2024-06-28 04:02:04,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11287, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11400, PETRI_PLACES=379, PETRI_TRANSITIONS=638} [2024-06-28 04:02:04,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 04:02:04,683 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 638 transitions, 11400 flow [2024-06-28 04:02:04,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:04,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:04,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:02:04,683 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 58848663, now seen corresponding path program 1 times [2024-06-28 04:02:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:04,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19692581] [2024-06-28 04:02:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:06,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19692581] [2024-06-28 04:02:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19692581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:06,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:06,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:06,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222277296] [2024-06-28 04:02:06,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:06,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:06,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:06,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 638 transitions, 11400 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:06,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:06,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:06,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:09,791 INFO L124 PetriNetUnfolderBase]: 4931/7541 cut-off events. [2024-06-28 04:02:09,791 INFO L125 PetriNetUnfolderBase]: For 1206567/1206587 co-relation queries the response was YES. [2024-06-28 04:02:09,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79223 conditions, 7541 events. 4931/7541 cut-off events. For 1206567/1206587 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43342 event pairs, 1022 based on Foata normal form. 21/7560 useless extension candidates. Maximal degree in co-relation 79044. Up to 7413 conditions per place. [2024-06-28 04:02:09,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 606 selfloop transitions, 53 changer transitions 0/662 dead transitions. [2024-06-28 04:02:09,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 662 transitions, 12868 flow [2024-06-28 04:02:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:02:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 04:02:09,918 INFO L175 Difference]: Start difference. First operand has 379 places, 638 transitions, 11400 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:02:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 662 transitions, 12868 flow [2024-06-28 04:02:13,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 662 transitions, 12791 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:13,738 INFO L231 Difference]: Finished difference. Result has 382 places, 641 transitions, 11525 flow [2024-06-28 04:02:13,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11323, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11525, PETRI_PLACES=382, PETRI_TRANSITIONS=641} [2024-06-28 04:02:13,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-28 04:02:13,738 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 641 transitions, 11525 flow [2024-06-28 04:02:13,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:13,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:13,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:13,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:02:13,739 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:13,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1778481825, now seen corresponding path program 3 times [2024-06-28 04:02:13,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:13,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449233384] [2024-06-28 04:02:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449233384] [2024-06-28 04:02:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449233384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:16,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222058438] [2024-06-28 04:02:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:16,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 641 transitions, 11525 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:16,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:16,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:16,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:19,052 INFO L124 PetriNetUnfolderBase]: 4925/7536 cut-off events. [2024-06-28 04:02:19,053 INFO L125 PetriNetUnfolderBase]: For 1227215/1227261 co-relation queries the response was YES. [2024-06-28 04:02:19,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79295 conditions, 7536 events. 4925/7536 cut-off events. For 1227215/1227261 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43401 event pairs, 1001 based on Foata normal form. 36/7568 useless extension candidates. Maximal degree in co-relation 79114. Up to 7140 conditions per place. [2024-06-28 04:02:19,160 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 122 changer transitions 0/665 dead transitions. [2024-06-28 04:02:19,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 665 transitions, 13139 flow [2024-06-28 04:02:19,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:02:19,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:02:19,162 INFO L175 Difference]: Start difference. First operand has 382 places, 641 transitions, 11525 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:02:19,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 665 transitions, 13139 flow [2024-06-28 04:02:23,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 665 transitions, 12959 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:23,026 INFO L231 Difference]: Finished difference. Result has 383 places, 641 transitions, 11600 flow [2024-06-28 04:02:23,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11347, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11600, PETRI_PLACES=383, PETRI_TRANSITIONS=641} [2024-06-28 04:02:23,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 04:02:23,027 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 641 transitions, 11600 flow [2024-06-28 04:02:23,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:23,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:02:23,028 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1694128523, now seen corresponding path program 7 times [2024-06-28 04:02:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:23,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172792418] [2024-06-28 04:02:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172792418] [2024-06-28 04:02:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172792418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:25,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547241402] [2024-06-28 04:02:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:25,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:25,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:25,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 641 transitions, 11600 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:25,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:25,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:28,890 INFO L124 PetriNetUnfolderBase]: 5043/7709 cut-off events. [2024-06-28 04:02:28,890 INFO L125 PetriNetUnfolderBase]: For 1296317/1296363 co-relation queries the response was YES. [2024-06-28 04:02:28,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82085 conditions, 7709 events. 5043/7709 cut-off events. For 1296317/1296363 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 44539 event pairs, 988 based on Foata normal form. 38/7743 useless extension candidates. Maximal degree in co-relation 81904. Up to 6875 conditions per place. [2024-06-28 04:02:28,993 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 520 selfloop transitions, 202 changer transitions 0/725 dead transitions. [2024-06-28 04:02:28,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 725 transitions, 14764 flow [2024-06-28 04:02:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:02:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:02:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 04:02:28,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:02:28,995 INFO L175 Difference]: Start difference. First operand has 383 places, 641 transitions, 11600 flow. Second operand 10 states and 170 transitions. [2024-06-28 04:02:28,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 725 transitions, 14764 flow [2024-06-28 04:02:32,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 725 transitions, 14496 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:02:32,212 INFO L231 Difference]: Finished difference. Result has 389 places, 681 transitions, 12641 flow [2024-06-28 04:02:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11332, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12641, PETRI_PLACES=389, PETRI_TRANSITIONS=681} [2024-06-28 04:02:32,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-28 04:02:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 681 transitions, 12641 flow [2024-06-28 04:02:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:32,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:02:32,214 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:32,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2017691031, now seen corresponding path program 8 times [2024-06-28 04:02:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186890502] [2024-06-28 04:02:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:32,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186890502] [2024-06-28 04:02:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186890502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410809562] [2024-06-28 04:02:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:34,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:34,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:34,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:34,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 681 transitions, 12641 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:34,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:34,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:34,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:37,493 INFO L124 PetriNetUnfolderBase]: 5063/7732 cut-off events. [2024-06-28 04:02:37,493 INFO L125 PetriNetUnfolderBase]: For 1330532/1330578 co-relation queries the response was YES. [2024-06-28 04:02:37,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84425 conditions, 7732 events. 5063/7732 cut-off events. For 1330532/1330578 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44614 event pairs, 997 based on Foata normal form. 38/7766 useless extension candidates. Maximal degree in co-relation 84241. Up to 7321 conditions per place. [2024-06-28 04:02:37,624 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 122 changer transitions 0/712 dead transitions. [2024-06-28 04:02:37,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 712 transitions, 14544 flow [2024-06-28 04:02:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:02:37,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:02:37,626 INFO L175 Difference]: Start difference. First operand has 389 places, 681 transitions, 12641 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:02:37,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 712 transitions, 14544 flow [2024-06-28 04:02:42,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 712 transitions, 14132 flow, removed 138 selfloop flow, removed 4 redundant places. [2024-06-28 04:02:42,696 INFO L231 Difference]: Finished difference. Result has 393 places, 688 transitions, 12689 flow [2024-06-28 04:02:42,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12689, PETRI_PLACES=393, PETRI_TRANSITIONS=688} [2024-06-28 04:02:42,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 04:02:42,697 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 688 transitions, 12689 flow [2024-06-28 04:02:42,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:42,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:02:42,698 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2017690659, now seen corresponding path program 4 times [2024-06-28 04:02:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503708489] [2024-06-28 04:02:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:45,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503708489] [2024-06-28 04:02:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503708489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:45,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:45,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791498987] [2024-06-28 04:02:45,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:45,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:45,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:45,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:45,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 688 transitions, 12689 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:45,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:45,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:48,075 INFO L124 PetriNetUnfolderBase]: 5045/7708 cut-off events. [2024-06-28 04:02:48,075 INFO L125 PetriNetUnfolderBase]: For 1326218/1326264 co-relation queries the response was YES. [2024-06-28 04:02:48,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82866 conditions, 7708 events. 5045/7708 cut-off events. For 1326218/1326264 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44423 event pairs, 954 based on Foata normal form. 40/7744 useless extension candidates. Maximal degree in co-relation 82680. Up to 6756 conditions per place. [2024-06-28 04:02:48,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 171 changer transitions 0/718 dead transitions. [2024-06-28 04:02:48,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 718 transitions, 14663 flow [2024-06-28 04:02:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:02:48,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:02:48,192 INFO L175 Difference]: Start difference. First operand has 393 places, 688 transitions, 12689 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:02:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 718 transitions, 14663 flow [2024-06-28 04:02:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 718 transitions, 14294 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-28 04:02:51,150 INFO L231 Difference]: Finished difference. Result has 395 places, 688 transitions, 12670 flow [2024-06-28 04:02:51,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12320, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12670, PETRI_PLACES=395, PETRI_TRANSITIONS=688} [2024-06-28 04:02:51,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-28 04:02:51,151 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 688 transitions, 12670 flow [2024-06-28 04:02:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:51,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:51,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:51,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:02:51,152 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:51,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1693829807, now seen corresponding path program 4 times [2024-06-28 04:02:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957678361] [2024-06-28 04:02:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:53,592 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 04:02:53,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957678361] [2024-06-28 04:02:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957678361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:53,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:53,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808990788] [2024-06-28 04:02:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:53,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:02:53,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 688 transitions, 12670 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:53,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:53,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:02:53,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:56,734 INFO L124 PetriNetUnfolderBase]: 5039/7700 cut-off events. [2024-06-28 04:02:56,734 INFO L125 PetriNetUnfolderBase]: For 1317670/1317716 co-relation queries the response was YES. [2024-06-28 04:02:56,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82988 conditions, 7700 events. 5039/7700 cut-off events. For 1317670/1317716 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44463 event pairs, 1016 based on Foata normal form. 36/7732 useless extension candidates. Maximal degree in co-relation 82801. Up to 7304 conditions per place. [2024-06-28 04:02:56,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 591 selfloop transitions, 117 changer transitions 0/711 dead transitions. [2024-06-28 04:02:56,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 711 transitions, 14172 flow [2024-06-28 04:02:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:02:56,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-28 04:02:56,865 INFO L175 Difference]: Start difference. First operand has 395 places, 688 transitions, 12670 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:02:56,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 711 transitions, 14172 flow [2024-06-28 04:03:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 711 transitions, 13493 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-28 04:03:01,149 INFO L231 Difference]: Finished difference. Result has 394 places, 688 transitions, 12233 flow [2024-06-28 04:03:01,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11991, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12233, PETRI_PLACES=394, PETRI_TRANSITIONS=688} [2024-06-28 04:03:01,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-28 04:03:01,150 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 688 transitions, 12233 flow [2024-06-28 04:03:01,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:01,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:01,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:03:01,150 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:01,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1339566953, now seen corresponding path program 9 times [2024-06-28 04:03:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908103404] [2024-06-28 04:03:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:01,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:03,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908103404] [2024-06-28 04:03:03,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908103404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:03,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416978380] [2024-06-28 04:03:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:03,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:03,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:03,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 688 transitions, 12233 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:03,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:03,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:06,670 INFO L124 PetriNetUnfolderBase]: 5084/7761 cut-off events. [2024-06-28 04:03:06,670 INFO L125 PetriNetUnfolderBase]: For 1373243/1373243 co-relation queries the response was YES. [2024-06-28 04:03:06,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83229 conditions, 7761 events. 5084/7761 cut-off events. For 1373243/1373243 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 44737 event pairs, 1024 based on Foata normal form. 9/7768 useless extension candidates. Maximal degree in co-relation 83041. Up to 7625 conditions per place. [2024-06-28 04:03:06,807 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 684 selfloop transitions, 50 changer transitions 0/737 dead transitions. [2024-06-28 04:03:06,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 737 transitions, 14306 flow [2024-06-28 04:03:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-28 04:03:06,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-28 04:03:06,808 INFO L175 Difference]: Start difference. First operand has 394 places, 688 transitions, 12233 flow. Second operand 9 states and 132 transitions. [2024-06-28 04:03:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 737 transitions, 14306 flow [2024-06-28 04:03:11,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 737 transitions, 14005 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 04:03:11,183 INFO L231 Difference]: Finished difference. Result has 397 places, 716 transitions, 12650 flow [2024-06-28 04:03:11,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11935, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12650, PETRI_PLACES=397, PETRI_TRANSITIONS=716} [2024-06-28 04:03:11,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 04:03:11,183 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 716 transitions, 12650 flow [2024-06-28 04:03:11,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:11,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:11,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:11,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:03:11,184 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:11,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -503288599, now seen corresponding path program 5 times [2024-06-28 04:03:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319504919] [2024-06-28 04:03:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:13,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319504919] [2024-06-28 04:03:13,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319504919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:13,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:13,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24993007] [2024-06-28 04:03:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:13,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:13,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:13,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 716 transitions, 12650 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:13,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:13,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:13,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:16,799 INFO L124 PetriNetUnfolderBase]: 5098/7781 cut-off events. [2024-06-28 04:03:16,799 INFO L125 PetriNetUnfolderBase]: For 1374372/1374372 co-relation queries the response was YES. [2024-06-28 04:03:16,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84798 conditions, 7781 events. 5098/7781 cut-off events. For 1374372/1374372 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 44890 event pairs, 1008 based on Foata normal form. 6/7785 useless extension candidates. Maximal degree in co-relation 84606. Up to 7498 conditions per place. [2024-06-28 04:03:16,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 676 selfloop transitions, 66 changer transitions 0/745 dead transitions. [2024-06-28 04:03:16,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 745 transitions, 14768 flow [2024-06-28 04:03:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:03:16,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 04:03:16,926 INFO L175 Difference]: Start difference. First operand has 397 places, 716 transitions, 12650 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:03:16,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 745 transitions, 14768 flow [2024-06-28 04:03:20,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 745 transitions, 14495 flow, removed 124 selfloop flow, removed 3 redundant places. [2024-06-28 04:03:20,941 INFO L231 Difference]: Finished difference. Result has 403 places, 719 transitions, 12590 flow [2024-06-28 04:03:20,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12377, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12590, PETRI_PLACES=403, PETRI_TRANSITIONS=719} [2024-06-28 04:03:20,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-28 04:03:20,942 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 719 transitions, 12590 flow [2024-06-28 04:03:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:20,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:03:20,943 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:20,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2063852859, now seen corresponding path program 6 times [2024-06-28 04:03:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:20,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936272469] [2024-06-28 04:03:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:23,139 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 04:03:23,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:23,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936272469] [2024-06-28 04:03:23,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936272469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:23,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:23,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:23,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478584601] [2024-06-28 04:03:23,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:23,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:23,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:23,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 719 transitions, 12590 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:23,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:23,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:23,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:26,245 INFO L124 PetriNetUnfolderBase]: 5108/7794 cut-off events. [2024-06-28 04:03:26,245 INFO L125 PetriNetUnfolderBase]: For 1373950/1373972 co-relation queries the response was YES. [2024-06-28 04:03:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84996 conditions, 7794 events. 5108/7794 cut-off events. For 1373950/1373972 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44931 event pairs, 946 based on Foata normal form. 24/7816 useless extension candidates. Maximal degree in co-relation 84802. Up to 7088 conditions per place. [2024-06-28 04:03:26,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 152 changer transitions 0/761 dead transitions. [2024-06-28 04:03:26,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 761 transitions, 15014 flow [2024-06-28 04:03:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:03:26,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:03:26,391 INFO L175 Difference]: Start difference. First operand has 403 places, 719 transitions, 12590 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:03:26,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 761 transitions, 15014 flow [2024-06-28 04:03:31,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 761 transitions, 14828 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:31,129 INFO L231 Difference]: Finished difference. Result has 404 places, 722 transitions, 12792 flow [2024-06-28 04:03:31,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12404, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12792, PETRI_PLACES=404, PETRI_TRANSITIONS=722} [2024-06-28 04:03:31,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 04:03:31,130 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 722 transitions, 12792 flow [2024-06-28 04:03:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:03:31,131 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:31,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash -386109643, now seen corresponding path program 10 times [2024-06-28 04:03:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:31,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145828106] [2024-06-28 04:03:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:31,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:33,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:33,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145828106] [2024-06-28 04:03:33,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145828106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:33,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:33,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551144243] [2024-06-28 04:03:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:33,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:33,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:33,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 722 transitions, 12792 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:33,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:33,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:33,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:36,215 INFO L124 PetriNetUnfolderBase]: 5123/7816 cut-off events. [2024-06-28 04:03:36,215 INFO L125 PetriNetUnfolderBase]: For 1405341/1405363 co-relation queries the response was YES. [2024-06-28 04:03:36,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85793 conditions, 7816 events. 5123/7816 cut-off events. For 1405341/1405363 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45157 event pairs, 958 based on Foata normal form. 25/7839 useless extension candidates. Maximal degree in co-relation 85598. Up to 7399 conditions per place. [2024-06-28 04:03:36,359 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 643 selfloop transitions, 136 changer transitions 0/782 dead transitions. [2024-06-28 04:03:36,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 782 transitions, 15041 flow [2024-06-28 04:03:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:03:36,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 04:03:36,360 INFO L175 Difference]: Start difference. First operand has 404 places, 722 transitions, 12792 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:03:36,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 782 transitions, 15041 flow [2024-06-28 04:03:41,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 782 transitions, 14746 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:41,507 INFO L231 Difference]: Finished difference. Result has 410 places, 745 transitions, 13506 flow [2024-06-28 04:03:41,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12516, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13506, PETRI_PLACES=410, PETRI_TRANSITIONS=745} [2024-06-28 04:03:41,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 04:03:41,508 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 745 transitions, 13506 flow [2024-06-28 04:03:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:41,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:03:41,508 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2063732517, now seen corresponding path program 11 times [2024-06-28 04:03:41,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:41,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732870515] [2024-06-28 04:03:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732870515] [2024-06-28 04:03:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732870515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:44,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:44,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199052746] [2024-06-28 04:03:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:44,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:44,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 745 transitions, 13506 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 04:03:44,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:44,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:44,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:47,153 INFO L124 PetriNetUnfolderBase]: 5130/7821 cut-off events. [2024-06-28 04:03:47,153 INFO L125 PetriNetUnfolderBase]: For 1426832/1426852 co-relation queries the response was YES. [2024-06-28 04:03:47,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86860 conditions, 7821 events. 5130/7821 cut-off events. For 1426832/1426852 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45074 event pairs, 980 based on Foata normal form. 23/7842 useless extension candidates. Maximal degree in co-relation 86661. Up to 7624 conditions per place. [2024-06-28 04:03:47,275 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 716 selfloop transitions, 62 changer transitions 0/781 dead transitions. [2024-06-28 04:03:47,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 781 transitions, 15287 flow [2024-06-28 04:03:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:03:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:03:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:03:47,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:03:47,277 INFO L175 Difference]: Start difference. First operand has 410 places, 745 transitions, 13506 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:03:47,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 781 transitions, 15287 flow [2024-06-28 04:03:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 781 transitions, 15085 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-06-28 04:03:51,567 INFO L231 Difference]: Finished difference. Result has 415 places, 748 transitions, 13550 flow [2024-06-28 04:03:51,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13304, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13550, PETRI_PLACES=415, PETRI_TRANSITIONS=748} [2024-06-28 04:03:51,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 04:03:51,568 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 748 transitions, 13550 flow [2024-06-28 04:03:51,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 04:03:51,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:51,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:51,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:03:51,571 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:51,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash -385872121, now seen corresponding path program 7 times [2024-06-28 04:03:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567407733] [2024-06-28 04:03:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:53,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567407733] [2024-06-28 04:03:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567407733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:53,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529511878] [2024-06-28 04:03:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:03:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 748 transitions, 13550 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:03:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:56,640 INFO L124 PetriNetUnfolderBase]: 5156/7861 cut-off events. [2024-06-28 04:03:56,653 INFO L125 PetriNetUnfolderBase]: For 1460592/1460614 co-relation queries the response was YES. [2024-06-28 04:03:56,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87907 conditions, 7861 events. 5156/7861 cut-off events. For 1460592/1460614 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45347 event pairs, 944 based on Foata normal form. 24/7883 useless extension candidates. Maximal degree in co-relation 87706. Up to 7140 conditions per place. [2024-06-28 04:03:56,799 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 616 selfloop transitions, 167 changer transitions 0/786 dead transitions. [2024-06-28 04:03:56,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 786 transitions, 16035 flow [2024-06-28 04:03:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:03:56,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:03:56,800 INFO L175 Difference]: Start difference. First operand has 415 places, 748 transitions, 13550 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:03:56,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 786 transitions, 16035 flow [2024-06-28 04:04:01,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 786 transitions, 15805 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:01,070 INFO L231 Difference]: Finished difference. Result has 418 places, 751 transitions, 13734 flow [2024-06-28 04:04:01,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13320, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13734, PETRI_PLACES=418, PETRI_TRANSITIONS=751} [2024-06-28 04:04:01,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-28 04:04:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 751 transitions, 13734 flow [2024-06-28 04:04:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:01,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:01,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:04:01,071 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:01,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1506392353, now seen corresponding path program 12 times [2024-06-28 04:04:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955683560] [2024-06-28 04:04:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:03,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:03,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955683560] [2024-06-28 04:04:03,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955683560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:03,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:03,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:03,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649415819] [2024-06-28 04:04:03,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:03,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:03,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 751 transitions, 13734 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:03,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:03,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:07,337 INFO L124 PetriNetUnfolderBase]: 5298/8065 cut-off events. [2024-06-28 04:04:07,338 INFO L125 PetriNetUnfolderBase]: For 1619607/1619627 co-relation queries the response was YES. [2024-06-28 04:04:07,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91860 conditions, 8065 events. 5298/8065 cut-off events. For 1619607/1619627 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46638 event pairs, 952 based on Foata normal form. 34/8097 useless extension candidates. Maximal degree in co-relation 91658. Up to 7211 conditions per place. [2024-06-28 04:04:07,481 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 604 selfloop transitions, 232 changer transitions 0/839 dead transitions. [2024-06-28 04:04:07,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 839 transitions, 16667 flow [2024-06-28 04:04:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:04:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:04:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-28 04:04:07,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 04:04:07,483 INFO L175 Difference]: Start difference. First operand has 418 places, 751 transitions, 13734 flow. Second operand 11 states and 196 transitions. [2024-06-28 04:04:07,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 839 transitions, 16667 flow [2024-06-28 04:04:12,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 839 transitions, 16324 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:12,218 INFO L231 Difference]: Finished difference. Result has 424 places, 784 transitions, 14792 flow [2024-06-28 04:04:12,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13391, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14792, PETRI_PLACES=424, PETRI_TRANSITIONS=784} [2024-06-28 04:04:12,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-28 04:04:12,219 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 784 transitions, 14792 flow [2024-06-28 04:04:12,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:12,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:12,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:04:12,219 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:12,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash -208977751, now seen corresponding path program 8 times [2024-06-28 04:04:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:12,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407853173] [2024-06-28 04:04:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407853173] [2024-06-28 04:04:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407853173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079094124] [2024-06-28 04:04:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:14,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:14,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 784 transitions, 14792 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:14,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:14,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:14,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:18,355 INFO L124 PetriNetUnfolderBase]: 5280/8036 cut-off events. [2024-06-28 04:04:18,355 INFO L125 PetriNetUnfolderBase]: For 1574715/1574717 co-relation queries the response was YES. [2024-06-28 04:04:18,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92658 conditions, 8036 events. 5280/8036 cut-off events. For 1574715/1574717 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46325 event pairs, 1013 based on Foata normal form. 8/8042 useless extension candidates. Maximal degree in co-relation 92455. Up to 7507 conditions per place. [2024-06-28 04:04:18,496 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 692 selfloop transitions, 119 changer transitions 0/814 dead transitions. [2024-06-28 04:04:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 814 transitions, 17295 flow [2024-06-28 04:04:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:04:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:04:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-28 04:04:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2024-06-28 04:04:18,497 INFO L175 Difference]: Start difference. First operand has 424 places, 784 transitions, 14792 flow. Second operand 11 states and 159 transitions. [2024-06-28 04:04:18,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 814 transitions, 17295 flow [2024-06-28 04:04:22,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 814 transitions, 16850 flow, removed 134 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:22,571 INFO L231 Difference]: Finished difference. Result has 429 places, 784 transitions, 14593 flow [2024-06-28 04:04:22,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14347, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14593, PETRI_PLACES=429, PETRI_TRANSITIONS=784} [2024-06-28 04:04:22,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-28 04:04:22,572 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 784 transitions, 14593 flow [2024-06-28 04:04:22,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:22,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:22,572 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 04:04:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:04:22,572 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:22,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1602711029, now seen corresponding path program 2 times [2024-06-28 04:04:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099622492] [2024-06-28 04:04:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:22,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099622492] [2024-06-28 04:04:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099622492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:24,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:24,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259435295] [2024-06-28 04:04:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:24,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:24,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 784 transitions, 14593 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:24,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:24,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:24,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:28,057 INFO L124 PetriNetUnfolderBase]: 5275/8023 cut-off events. [2024-06-28 04:04:28,058 INFO L125 PetriNetUnfolderBase]: For 1552107/1552127 co-relation queries the response was YES. [2024-06-28 04:04:28,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92272 conditions, 8023 events. 5275/8023 cut-off events. For 1552107/1552127 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46220 event pairs, 982 based on Foata normal form. 21/8042 useless extension candidates. Maximal degree in co-relation 92067. Up to 7861 conditions per place. [2024-06-28 04:04:28,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 748 selfloop transitions, 60 changer transitions 0/811 dead transitions. [2024-06-28 04:04:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 811 transitions, 16308 flow [2024-06-28 04:04:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:04:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:04:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:04:28,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:04:28,226 INFO L175 Difference]: Start difference. First operand has 429 places, 784 transitions, 14593 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:04:28,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 811 transitions, 16308 flow [2024-06-28 04:04:32,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 811 transitions, 15856 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-28 04:04:32,775 INFO L231 Difference]: Finished difference. Result has 425 places, 784 transitions, 14300 flow [2024-06-28 04:04:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14141, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14300, PETRI_PLACES=425, PETRI_TRANSITIONS=784} [2024-06-28 04:04:32,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 04:04:32,776 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 784 transitions, 14300 flow [2024-06-28 04:04:32,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:32,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:32,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:04:32,777 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 27443687, now seen corresponding path program 2 times [2024-06-28 04:04:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338004451] [2024-06-28 04:04:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:35,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338004451] [2024-06-28 04:04:35,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338004451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:35,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:35,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963328796] [2024-06-28 04:04:35,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:35,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:35,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 784 transitions, 14300 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:35,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:35,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:35,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:38,485 INFO L124 PetriNetUnfolderBase]: 5283/8036 cut-off events. [2024-06-28 04:04:38,486 INFO L125 PetriNetUnfolderBase]: For 1580112/1580132 co-relation queries the response was YES. [2024-06-28 04:04:38,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92257 conditions, 8036 events. 5283/8036 cut-off events. For 1580112/1580132 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 46320 event pairs, 1000 based on Foata normal form. 22/8056 useless extension candidates. Maximal degree in co-relation 92051. Up to 7933 conditions per place. [2024-06-28 04:04:38,627 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 770 selfloop transitions, 32 changer transitions 0/805 dead transitions. [2024-06-28 04:04:38,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 805 transitions, 16032 flow [2024-06-28 04:04:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:04:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:04:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 04:04:38,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:04:38,628 INFO L175 Difference]: Start difference. First operand has 425 places, 784 transitions, 14300 flow. Second operand 6 states and 99 transitions. [2024-06-28 04:04:38,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 805 transitions, 16032 flow [2024-06-28 04:04:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 805 transitions, 15912 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:42,411 INFO L231 Difference]: Finished difference. Result has 426 places, 786 transitions, 14319 flow [2024-06-28 04:04:42,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14180, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14319, PETRI_PLACES=426, PETRI_TRANSITIONS=786} [2024-06-28 04:04:42,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 04:04:42,412 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 786 transitions, 14319 flow [2024-06-28 04:04:42,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:42,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:42,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:04:42,412 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:42,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134997, now seen corresponding path program 3 times [2024-06-28 04:04:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272633103] [2024-06-28 04:04:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:44,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:44,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272633103] [2024-06-28 04:04:44,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272633103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:44,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:44,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:44,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13880743] [2024-06-28 04:04:44,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:44,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:44,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:44,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:44,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 786 transitions, 14319 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:44,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:44,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:48,309 INFO L124 PetriNetUnfolderBase]: 5291/8048 cut-off events. [2024-06-28 04:04:48,310 INFO L125 PetriNetUnfolderBase]: For 1605359/1605379 co-relation queries the response was YES. [2024-06-28 04:04:48,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92649 conditions, 8048 events. 5291/8048 cut-off events. For 1605359/1605379 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 46398 event pairs, 998 based on Foata normal form. 22/8068 useless extension candidates. Maximal degree in co-relation 92442. Up to 7931 conditions per place. [2024-06-28 04:04:48,438 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 770 selfloop transitions, 36 changer transitions 0/809 dead transitions. [2024-06-28 04:04:48,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 809 transitions, 16067 flow [2024-06-28 04:04:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:04:48,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 04:04:48,440 INFO L175 Difference]: Start difference. First operand has 426 places, 786 transitions, 14319 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:04:48,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 809 transitions, 16067 flow [2024-06-28 04:04:52,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 809 transitions, 15950 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 04:04:52,845 INFO L231 Difference]: Finished difference. Result has 429 places, 788 transitions, 14353 flow [2024-06-28 04:04:52,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14202, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14353, PETRI_PLACES=429, PETRI_TRANSITIONS=788} [2024-06-28 04:04:52,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-28 04:04:52,846 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 788 transitions, 14353 flow [2024-06-28 04:04:52,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:52,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:52,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:52,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:04:52,847 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:52,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash -385863193, now seen corresponding path program 4 times [2024-06-28 04:04:52,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:52,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75396987] [2024-06-28 04:04:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:52,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:55,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:55,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75396987] [2024-06-28 04:04:55,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75396987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:55,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:55,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:55,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021498345] [2024-06-28 04:04:55,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:55,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:55,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:55,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:04:55,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 788 transitions, 14353 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:55,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:55,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:04:55,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:58,617 INFO L124 PetriNetUnfolderBase]: 5286/8041 cut-off events. [2024-06-28 04:04:58,617 INFO L125 PetriNetUnfolderBase]: For 1618489/1618509 co-relation queries the response was YES. [2024-06-28 04:04:58,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92577 conditions, 8041 events. 5286/8041 cut-off events. For 1618489/1618509 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 46366 event pairs, 1001 based on Foata normal form. 22/8061 useless extension candidates. Maximal degree in co-relation 92369. Up to 7932 conditions per place. [2024-06-28 04:04:58,765 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 770 selfloop transitions, 37 changer transitions 0/810 dead transitions. [2024-06-28 04:04:58,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 810 transitions, 16105 flow [2024-06-28 04:04:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:04:58,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 04:04:58,767 INFO L175 Difference]: Start difference. First operand has 429 places, 788 transitions, 14353 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:04:58,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 810 transitions, 16105 flow [2024-06-28 04:05:02,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 810 transitions, 15976 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 04:05:02,743 INFO L231 Difference]: Finished difference. Result has 431 places, 790 transitions, 14381 flow [2024-06-28 04:05:02,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14224, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14381, PETRI_PLACES=431, PETRI_TRANSITIONS=790} [2024-06-28 04:05:02,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 04:05:02,744 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 790 transitions, 14381 flow [2024-06-28 04:05:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:02,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:02,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:02,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:05:02,744 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:02,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2063740081, now seen corresponding path program 4 times [2024-06-28 04:05:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:02,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109142557] [2024-06-28 04:05:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109142557] [2024-06-28 04:05:04,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109142557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:04,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:04,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:04,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042679926] [2024-06-28 04:05:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:04,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:04,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:04,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:04,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 790 transitions, 14381 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:04,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:04,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:04,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:07,998 INFO L124 PetriNetUnfolderBase]: 5296/8054 cut-off events. [2024-06-28 04:05:07,998 INFO L125 PetriNetUnfolderBase]: For 1643118/1643138 co-relation queries the response was YES. [2024-06-28 04:05:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92952 conditions, 8054 events. 5296/8054 cut-off events. For 1643118/1643138 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46450 event pairs, 987 based on Foata normal form. 22/8074 useless extension candidates. Maximal degree in co-relation 92743. Up to 7862 conditions per place. [2024-06-28 04:05:08,141 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 747 selfloop transitions, 78 changer transitions 0/828 dead transitions. [2024-06-28 04:05:08,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 828 transitions, 16569 flow [2024-06-28 04:05:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:05:08,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:05:08,142 INFO L175 Difference]: Start difference. First operand has 431 places, 790 transitions, 14381 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:05:08,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 828 transitions, 16569 flow [2024-06-28 04:05:12,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 828 transitions, 16434 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 04:05:12,687 INFO L231 Difference]: Finished difference. Result has 435 places, 796 transitions, 14640 flow [2024-06-28 04:05:12,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14246, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14640, PETRI_PLACES=435, PETRI_TRANSITIONS=796} [2024-06-28 04:05:12,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-28 04:05:12,688 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 796 transitions, 14640 flow [2024-06-28 04:05:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:12,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:12,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:12,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:05:12,689 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:12,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -385863627, now seen corresponding path program 3 times [2024-06-28 04:05:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:12,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014833321] [2024-06-28 04:05:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:15,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:15,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014833321] [2024-06-28 04:05:15,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014833321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:15,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:05:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439065158] [2024-06-28 04:05:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:05:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:05:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:05:15,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:15,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 796 transitions, 14640 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:15,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:15,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:15,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:18,641 INFO L124 PetriNetUnfolderBase]: 5293/8051 cut-off events. [2024-06-28 04:05:18,641 INFO L125 PetriNetUnfolderBase]: For 1656691/1656713 co-relation queries the response was YES. [2024-06-28 04:05:18,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93249 conditions, 8051 events. 5293/8051 cut-off events. For 1656691/1656713 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46433 event pairs, 1001 based on Foata normal form. 23/8072 useless extension candidates. Maximal degree in co-relation 93038. Up to 7939 conditions per place. [2024-06-28 04:05:18,779 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 770 selfloop transitions, 43 changer transitions 0/816 dead transitions. [2024-06-28 04:05:18,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 816 transitions, 16338 flow [2024-06-28 04:05:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:05:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:05:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:05:18,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 04:05:18,780 INFO L175 Difference]: Start difference. First operand has 435 places, 796 transitions, 14640 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:05:18,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 816 transitions, 16338 flow [2024-06-28 04:05:23,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 816 transitions, 16121 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 04:05:23,526 INFO L231 Difference]: Finished difference. Result has 437 places, 796 transitions, 14521 flow [2024-06-28 04:05:23,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14423, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14521, PETRI_PLACES=437, PETRI_TRANSITIONS=796} [2024-06-28 04:05:23,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 04:05:23,527 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 796 transitions, 14521 flow [2024-06-28 04:05:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:23,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:23,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:23,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:05:23,528 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:23,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -386232589, now seen corresponding path program 4 times [2024-06-28 04:05:23,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:23,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945646872] [2024-06-28 04:05:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:26,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945646872] [2024-06-28 04:05:26,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945646872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:26,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:26,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:05:26,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444915586] [2024-06-28 04:05:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:05:26,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:05:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:05:26,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:26,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 796 transitions, 14521 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:26,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:26,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:29,442 INFO L124 PetriNetUnfolderBase]: 5324/8102 cut-off events. [2024-06-28 04:05:29,443 INFO L125 PetriNetUnfolderBase]: For 1744494/1744518 co-relation queries the response was YES. [2024-06-28 04:05:29,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93531 conditions, 8102 events. 5324/8102 cut-off events. For 1744494/1744518 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 46736 event pairs, 847 based on Foata normal form. 34/8134 useless extension candidates. Maximal degree in co-relation 93319. Up to 7699 conditions per place. [2024-06-28 04:05:29,596 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 736 selfloop transitions, 105 changer transitions 0/844 dead transitions. [2024-06-28 04:05:29,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 844 transitions, 16484 flow [2024-06-28 04:05:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:05:29,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:05:29,600 INFO L175 Difference]: Start difference. First operand has 437 places, 796 transitions, 14521 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:05:29,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 844 transitions, 16484 flow [2024-06-28 04:05:35,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 844 transitions, 16276 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 04:05:35,735 INFO L231 Difference]: Finished difference. Result has 437 places, 797 transitions, 14592 flow [2024-06-28 04:05:35,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14313, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14592, PETRI_PLACES=437, PETRI_TRANSITIONS=797} [2024-06-28 04:05:35,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 04:05:35,737 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 797 transitions, 14592 flow [2024-06-28 04:05:35,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:35,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:35,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:35,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:05:35,739 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:35,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -386232279, now seen corresponding path program 5 times [2024-06-28 04:05:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:35,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571276530] [2024-06-28 04:05:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:37,953 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 04:05:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571276530] [2024-06-28 04:05:37,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571276530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:37,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181391775] [2024-06-28 04:05:37,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:37,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:37,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 797 transitions, 14592 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:37,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:37,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:37,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:41,233 INFO L124 PetriNetUnfolderBase]: 5342/8127 cut-off events. [2024-06-28 04:05:41,234 INFO L125 PetriNetUnfolderBase]: For 1686821/1686845 co-relation queries the response was YES. [2024-06-28 04:05:41,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94153 conditions, 8127 events. 5342/8127 cut-off events. For 1686821/1686845 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47049 event pairs, 958 based on Foata normal form. 24/8149 useless extension candidates. Maximal degree in co-relation 93942. Up to 7812 conditions per place. [2024-06-28 04:05:41,359 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 715 selfloop transitions, 126 changer transitions 0/844 dead transitions. [2024-06-28 04:05:41,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 844 transitions, 16876 flow [2024-06-28 04:05:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:05:41,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:05:41,360 INFO L175 Difference]: Start difference. First operand has 437 places, 797 transitions, 14592 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:05:41,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 844 transitions, 16876 flow [2024-06-28 04:05:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 844 transitions, 16661 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:46,297 INFO L231 Difference]: Finished difference. Result has 440 places, 803 transitions, 14894 flow [2024-06-28 04:05:46,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14377, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14894, PETRI_PLACES=440, PETRI_TRANSITIONS=803} [2024-06-28 04:05:46,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-28 04:05:46,298 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 803 transitions, 14894 flow [2024-06-28 04:05:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:46,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:46,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:05:46,299 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:46,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -385876089, now seen corresponding path program 6 times [2024-06-28 04:05:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507877625] [2024-06-28 04:05:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507877625] [2024-06-28 04:05:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507877625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:48,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:48,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:05:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707849413] [2024-06-28 04:05:48,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:48,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:05:48,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:48,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:05:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:05:48,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 803 transitions, 14894 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:51,797 INFO L124 PetriNetUnfolderBase]: 5333/8113 cut-off events. [2024-06-28 04:05:51,797 INFO L125 PetriNetUnfolderBase]: For 1701520/1701540 co-relation queries the response was YES. [2024-06-28 04:05:51,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94316 conditions, 8113 events. 5333/8113 cut-off events. For 1701520/1701540 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 46860 event pairs, 1005 based on Foata normal form. 23/8134 useless extension candidates. Maximal degree in co-relation 94103. Up to 7990 conditions per place. [2024-06-28 04:05:51,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 773 selfloop transitions, 49 changer transitions 0/825 dead transitions. [2024-06-28 04:05:51,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 825 transitions, 16626 flow [2024-06-28 04:05:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 04:05:51,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-28 04:05:51,950 INFO L175 Difference]: Start difference. First operand has 440 places, 803 transitions, 14894 flow. Second operand 8 states and 122 transitions. [2024-06-28 04:05:51,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 825 transitions, 16626 flow [2024-06-28 04:05:57,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 825 transitions, 16228 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:57,638 INFO L231 Difference]: Finished difference. Result has 442 places, 803 transitions, 14605 flow [2024-06-28 04:05:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14605, PETRI_PLACES=442, PETRI_TRANSITIONS=803} [2024-06-28 04:05:57,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 04:05:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 803 transitions, 14605 flow [2024-06-28 04:05:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:57,639 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 04:05:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:05:57,640 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:05:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -970899689, now seen corresponding path program 13 times [2024-06-28 04:05:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158776485] [2024-06-28 04:05:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:59,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158776485] [2024-06-28 04:05:59,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158776485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:59,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:59,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950318388] [2024-06-28 04:05:59,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:59,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:59,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:59,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:05:59,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 803 transitions, 14605 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:59,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:59,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:05:59,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:02,758 INFO L124 PetriNetUnfolderBase]: 5365/8161 cut-off events. [2024-06-28 04:06:02,758 INFO L125 PetriNetUnfolderBase]: For 1704784/1704808 co-relation queries the response was YES. [2024-06-28 04:06:02,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94282 conditions, 8161 events. 5365/8161 cut-off events. For 1704784/1704808 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47244 event pairs, 1001 based on Foata normal form. 25/8184 useless extension candidates. Maximal degree in co-relation 94069. Up to 7845 conditions per place. [2024-06-28 04:06:02,890 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 739 selfloop transitions, 111 changer transitions 0/853 dead transitions. [2024-06-28 04:06:02,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 853 transitions, 16756 flow [2024-06-28 04:06:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 04:06:02,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:06:02,891 INFO L175 Difference]: Start difference. First operand has 442 places, 803 transitions, 14605 flow. Second operand 9 states and 144 transitions. [2024-06-28 04:06:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 853 transitions, 16756 flow [2024-06-28 04:06:09,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 853 transitions, 16521 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-28 04:06:09,556 INFO L231 Difference]: Finished difference. Result has 446 places, 824 transitions, 15042 flow [2024-06-28 04:06:09,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14370, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15042, PETRI_PLACES=446, PETRI_TRANSITIONS=824} [2024-06-28 04:06:09,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-28 04:06:09,557 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 824 transitions, 15042 flow [2024-06-28 04:06:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:09,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:09,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:09,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:06:09,557 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:06:09,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1369035659, now seen corresponding path program 1 times [2024-06-28 04:06:09,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:09,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881662263] [2024-06-28 04:06:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:12,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881662263] [2024-06-28 04:06:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881662263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:12,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:06:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380609612] [2024-06-28 04:06:12,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:12,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:06:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:06:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:06:12,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:06:12,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 824 transitions, 15042 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:12,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:12,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:06:12,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:16,351 INFO L124 PetriNetUnfolderBase]: 5394/8203 cut-off events. [2024-06-28 04:06:16,351 INFO L125 PetriNetUnfolderBase]: For 1769415/1769461 co-relation queries the response was YES. [2024-06-28 04:06:16,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95425 conditions, 8203 events. 5394/8203 cut-off events. For 1769415/1769461 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 47348 event pairs, 885 based on Foata normal form. 38/8237 useless extension candidates. Maximal degree in co-relation 95209. Up to 7701 conditions per place. [2024-06-28 04:06:16,764 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 709 selfloop transitions, 146 changer transitions 0/858 dead transitions. [2024-06-28 04:06:16,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 858 transitions, 17232 flow [2024-06-28 04:06:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 04:06:16,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-28 04:06:16,767 INFO L175 Difference]: Start difference. First operand has 446 places, 824 transitions, 15042 flow. Second operand 9 states and 138 transitions. [2024-06-28 04:06:16,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 858 transitions, 17232 flow [2024-06-28 04:06:21,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 858 transitions, 17071 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 04:06:21,241 INFO L231 Difference]: Finished difference. Result has 451 places, 830 transitions, 15325 flow [2024-06-28 04:06:21,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14881, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15325, PETRI_PLACES=451, PETRI_TRANSITIONS=830} [2024-06-28 04:06:21,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-28 04:06:21,242 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 830 transitions, 15325 flow [2024-06-28 04:06:21,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:21,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:21,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:21,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:06:21,242 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:06:21,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1457408369, now seen corresponding path program 2 times [2024-06-28 04:06:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:21,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516159939] [2024-06-28 04:06:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516159939] [2024-06-28 04:06:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516159939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599105193] [2024-06-28 04:06:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:24,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:06:24,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 830 transitions, 15325 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:24,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:24,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:06:24,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:27,895 INFO L124 PetriNetUnfolderBase]: 5410/8227 cut-off events. [2024-06-28 04:06:27,896 INFO L125 PetriNetUnfolderBase]: For 1801292/1801338 co-relation queries the response was YES. [2024-06-28 04:06:28,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96199 conditions, 8227 events. 5410/8227 cut-off events. For 1801292/1801338 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 47653 event pairs, 988 based on Foata normal form. 38/8261 useless extension candidates. Maximal degree in co-relation 95982. Up to 7805 conditions per place. [2024-06-28 04:06:28,069 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 713 selfloop transitions, 140 changer transitions 0/856 dead transitions. [2024-06-28 04:06:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 856 transitions, 17195 flow [2024-06-28 04:06:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:06:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 04:06:28,071 INFO L175 Difference]: Start difference. First operand has 451 places, 830 transitions, 15325 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:06:28,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 856 transitions, 17195 flow [2024-06-28 04:06:33,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 856 transitions, 16899 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 04:06:33,933 INFO L231 Difference]: Finished difference. Result has 454 places, 833 transitions, 15397 flow [2024-06-28 04:06:33,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15059, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15397, PETRI_PLACES=454, PETRI_TRANSITIONS=833} [2024-06-28 04:06:33,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 04:06:33,934 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 833 transitions, 15397 flow [2024-06-28 04:06:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:33,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:33,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:33,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:06:33,934 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:06:33,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1339320689, now seen corresponding path program 3 times [2024-06-28 04:06:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:33,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508824572] [2024-06-28 04:06:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:36,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:36,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508824572] [2024-06-28 04:06:36,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508824572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:36,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:36,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:36,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859819362] [2024-06-28 04:06:36,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:36,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:36,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:06:36,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 833 transitions, 15397 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:36,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:36,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:06:36,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:40,374 INFO L124 PetriNetUnfolderBase]: 5514/8389 cut-off events. [2024-06-28 04:06:40,374 INFO L125 PetriNetUnfolderBase]: For 2015176/2015176 co-relation queries the response was YES. [2024-06-28 04:06:40,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97725 conditions, 8389 events. 5514/8389 cut-off events. For 2015176/2015176 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 48719 event pairs, 1051 based on Foata normal form. 28/8415 useless extension candidates. Maximal degree in co-relation 97506. Up to 8096 conditions per place. [2024-06-28 04:06:40,553 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 799 selfloop transitions, 64 changer transitions 0/866 dead transitions. [2024-06-28 04:06:40,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 866 transitions, 17445 flow [2024-06-28 04:06:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:06:40,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 04:06:40,554 INFO L175 Difference]: Start difference. First operand has 454 places, 833 transitions, 15397 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:06:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 866 transitions, 17445 flow [2024-06-28 04:06:46,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 866 transitions, 17139 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:46,403 INFO L231 Difference]: Finished difference. Result has 457 places, 838 transitions, 15348 flow [2024-06-28 04:06:46,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15093, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15348, PETRI_PLACES=457, PETRI_TRANSITIONS=838} [2024-06-28 04:06:46,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-28 04:06:46,403 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 838 transitions, 15348 flow [2024-06-28 04:06:46,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:46,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:46,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:46,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:06:46,404 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:06:46,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1339135991, now seen corresponding path program 1 times [2024-06-28 04:06:46,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:46,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649359468] [2024-06-28 04:06:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649359468] [2024-06-28 04:06:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649359468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583630336] [2024-06-28 04:06:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-28 04:06:49,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 838 transitions, 15348 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:49,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:49,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-28 04:06:49,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:52,616 INFO L124 PetriNetUnfolderBase]: 5522/8401 cut-off events. [2024-06-28 04:06:52,616 INFO L125 PetriNetUnfolderBase]: For 1845907/1845907 co-relation queries the response was YES. [2024-06-28 04:06:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97992 conditions, 8401 events. 5522/8401 cut-off events. For 1845907/1845907 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 48809 event pairs, 1055 based on Foata normal form. 2/8401 useless extension candidates. Maximal degree in co-relation 97772. Up to 8301 conditions per place. [2024-06-28 04:06:53,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 823 selfloop transitions, 32 changer transitions 0/858 dead transitions. [2024-06-28 04:06:53,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 858 transitions, 17184 flow [2024-06-28 04:06:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-28 04:06:53,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-28 04:06:53,057 INFO L175 Difference]: Start difference. First operand has 457 places, 838 transitions, 15348 flow. Second operand 8 states and 116 transitions. [2024-06-28 04:06:53,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 858 transitions, 17184 flow Killed by 15