./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:06:45,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:06:45,832 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:06:45,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:06:45,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:06:45,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:06:45,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:06:45,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:06:45,863 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:06:45,866 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:06:45,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:06:45,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:06:45,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:06:45,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:06:45,869 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:06:45,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:06:45,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:06:45,869 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:06:45,870 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:06:45,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:06:45,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:06:45,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:06:45,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:06:45,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:06:45,871 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:06:45,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:06:45,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:06:45,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:06:45,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:06:45,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:06:45,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:06:45,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:06:45,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:06:45,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:06:45,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:06:45,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:06:45,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:06:45,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:06:45,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:06:45,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:06:45,875 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:06:45,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:06:45,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:06:45,876 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:06:46,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:06:46,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:06:46,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:06:46,181 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:06:46,181 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:06:46,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-28 02:06:47,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:06:47,448 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:06:47,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-28 02:06:47,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4bc8dfb/9ea31670fada4b5f8ed66dc3ee921778/FLAG63f23a424 [2024-06-28 02:06:47,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4bc8dfb/9ea31670fada4b5f8ed66dc3ee921778 [2024-06-28 02:06:47,490 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:06:47,490 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:06:47,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_rmo.yml/witness.yml [2024-06-28 02:06:47,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:06:47,693 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:06:47,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:06:47,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:06:47,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:06:47,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:06:47" (1/2) ... [2024-06-28 02:06:47,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437a2a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:06:47, skipping insertion in model container [2024-06-28 02:06:47,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:06:47" (1/2) ... [2024-06-28 02:06:47,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@706dc922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:06:47, skipping insertion in model container [2024-06-28 02:06:47,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:06:47" (2/2) ... [2024-06-28 02:06:47,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437a2a7b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:47, skipping insertion in model container [2024-06-28 02:06:47,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:06:47" (2/2) ... [2024-06-28 02:06:47,702 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:06:47,835 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:06:47,836 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:06:47,836 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:06:47,836 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:06:47,837 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:06:47,837 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-28 02:06:47,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:06:48,034 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i[988,1001] [2024-06-28 02:06:48,223 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:06:48,236 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 02:06:48,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:06:48,387 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:06:48,416 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:06:48,417 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48 WrapperNode [2024-06-28 02:06:48,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:06:48,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:06:48,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:06:48,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:06:48,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,473 INFO L138 Inliner]: procedures = 175, calls = 87, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 205 [2024-06-28 02:06:48,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:06:48,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:06:48,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:06:48,475 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:06:48,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,502 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-28 02:06:48,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,502 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:06:48,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:06:48,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:06:48,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:06:48,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (1/1) ... [2024-06-28 02:06:48,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:06:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:06:48,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 02:06:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 02:06:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 02:06:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 02:06:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 02:06:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 02:06:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:06:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:06:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:06:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:06:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:06:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:06:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:06:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:06:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:06:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 02:06:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:06:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:06:48,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:06:48,642 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:06:48,794 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:06:48,796 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:06:49,265 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:06:49,266 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:06:49,589 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:06:49,589 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:06:49,589 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:06:49 BoogieIcfgContainer [2024-06-28 02:06:49,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:06:49,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:06:49,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:06:49,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:06:49,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:06:47" (1/4) ... [2024-06-28 02:06:49,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0c34db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:06:49, skipping insertion in model container [2024-06-28 02:06:49,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:06:47" (2/4) ... [2024-06-28 02:06:49,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0c34db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:06:49, skipping insertion in model container [2024-06-28 02:06:49,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:06:48" (3/4) ... [2024-06-28 02:06:49,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0c34db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:06:49, skipping insertion in model container [2024-06-28 02:06:49,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:06:49" (4/4) ... [2024-06-28 02:06:49,596 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2024-06-28 02:06:49,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:06:49,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:06:49,610 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:06:49,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:06:49,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 02:06:49,705 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-28 02:06:49,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:06:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-28 02:06:49,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 02:06:49,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-28 02:06:49,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:06:49,723 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;@30139238, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:06:49,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 02:06:49,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:06:49,727 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 02:06:49,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:06:49,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:49,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:06:49,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:49,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 747214964, now seen corresponding path program 1 times [2024-06-28 02:06:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713709059] [2024-06-28 02:06:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713709059] [2024-06-28 02:06:51,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713709059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:51,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:51,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:06:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123237689] [2024-06-28 02:06:51,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:51,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:06:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:06:51,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:06:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:06:51,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:51,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:51,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:06:51,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:52,315 INFO L124 PetriNetUnfolderBase]: 3350/5180 cut-off events. [2024-06-28 02:06:52,315 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 02:06:52,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10095 conditions, 5180 events. 3350/5180 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29436 event pairs, 2161 based on Foata normal form. 0/5001 useless extension candidates. Maximal degree in co-relation 10083. Up to 4834 conditions per place. [2024-06-28 02:06:52,345 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-28 02:06:52,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 231 flow [2024-06-28 02:06:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:06:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:06:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-28 02:06:52,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-06-28 02:06:52,356 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 89 transitions. [2024-06-28 02:06:52,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 231 flow [2024-06-28 02:06:52,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:52,364 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-28 02:06:52,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-28 02:06:52,368 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-28 02:06:52,368 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-28 02:06:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:52,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:52,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:52,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:06:52,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:52,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:52,370 INFO L85 PathProgramCache]: Analyzing trace with hash 814325731, now seen corresponding path program 1 times [2024-06-28 02:06:52,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767525803] [2024-06-28 02:06:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:52,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:53,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767525803] [2024-06-28 02:06:53,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767525803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:53,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:53,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:06:53,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332338541] [2024-06-28 02:06:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:06:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:06:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:06:53,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:06:53,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 02:06:53,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:53,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:06:53,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:54,521 INFO L124 PetriNetUnfolderBase]: 3338/5162 cut-off events. [2024-06-28 02:06:54,521 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-28 02:06:54,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11219 conditions, 5162 events. 3338/5162 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29524 event pairs, 1485 based on Foata normal form. 6/5167 useless extension candidates. Maximal degree in co-relation 11207. Up to 4762 conditions per place. [2024-06-28 02:06:54,543 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 59 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-28 02:06:54,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 337 flow [2024-06-28 02:06:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:06:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:06:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-28 02:06:54,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-28 02:06:54,546 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 119 transitions. [2024-06-28 02:06:54,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 337 flow [2024-06-28 02:06:54,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:06:54,548 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 171 flow [2024-06-28 02:06:54,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-28 02:06:54,549 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2024-06-28 02:06:54,549 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 171 flow [2024-06-28 02:06:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 02:06:54,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:54,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:06:54,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:54,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1807099679, now seen corresponding path program 1 times [2024-06-28 02:06:54,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446908194] [2024-06-28 02:06:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:56,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:56,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446908194] [2024-06-28 02:06:56,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446908194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:56,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:56,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:06:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896608032] [2024-06-28 02:06:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:56,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:06:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:06:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:06:56,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:06:56,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:56,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:56,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:06:56,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:57,861 INFO L124 PetriNetUnfolderBase]: 3329/5147 cut-off events. [2024-06-28 02:06:57,861 INFO L125 PetriNetUnfolderBase]: For 2306/2306 co-relation queries the response was YES. [2024-06-28 02:06:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12327 conditions, 5147 events. 3329/5147 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29430 event pairs, 1086 based on Foata normal form. 6/5152 useless extension candidates. Maximal degree in co-relation 12313. Up to 4693 conditions per place. [2024-06-28 02:06:57,888 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 80 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2024-06-28 02:06:57,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 510 flow [2024-06-28 02:06:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:06:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:06:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 02:06:57,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-06-28 02:06:57,893 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 171 flow. Second operand 6 states and 171 transitions. [2024-06-28 02:06:57,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 510 flow [2024-06-28 02:06:57,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 482 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 02:06:57,898 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 231 flow [2024-06-28 02:06:57,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-28 02:06:57,899 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2024-06-28 02:06:57,899 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 231 flow [2024-06-28 02:06:57,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:57,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:57,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:57,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:06:57,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:57,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1183815549, now seen corresponding path program 1 times [2024-06-28 02:06:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382816231] [2024-06-28 02:06:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:59,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382816231] [2024-06-28 02:06:59,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382816231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:59,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:06:59,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883060206] [2024-06-28 02:06:59,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:59,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:06:59,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:06:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:06:59,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:59,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:59,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:59,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:59,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:00,454 INFO L124 PetriNetUnfolderBase]: 3319/5133 cut-off events. [2024-06-28 02:07:00,454 INFO L125 PetriNetUnfolderBase]: For 4456/4456 co-relation queries the response was YES. [2024-06-28 02:07:00,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 5133 events. 3319/5133 cut-off events. For 4456/4456 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29290 event pairs, 1268 based on Foata normal form. 4/5136 useless extension candidates. Maximal degree in co-relation 13374. Up to 4749 conditions per place. [2024-06-28 02:07:00,487 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-28 02:07:00,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 455 flow [2024-06-28 02:07:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:07:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:07:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:07:00,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-28 02:07:00,490 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 231 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:07:00,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 455 flow [2024-06-28 02:07:00,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 417 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:07:00,497 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 252 flow [2024-06-28 02:07:00,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-28 02:07:00,498 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-06-28 02:07:00,498 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 252 flow [2024-06-28 02:07:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:00,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:07:00,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash -311430866, now seen corresponding path program 1 times [2024-06-28 02:07:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142076033] [2024-06-28 02:07:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:02,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142076033] [2024-06-28 02:07:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142076033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:02,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:07:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635932004] [2024-06-28 02:07:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:07:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:07:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:07:02,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:02,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:02,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:02,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:02,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:03,759 INFO L124 PetriNetUnfolderBase]: 3371/5227 cut-off events. [2024-06-28 02:07:03,759 INFO L125 PetriNetUnfolderBase]: For 6532/6534 co-relation queries the response was YES. [2024-06-28 02:07:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 5227 events. 3371/5227 cut-off events. For 6532/6534 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29981 event pairs, 1182 based on Foata normal form. 6/5232 useless extension candidates. Maximal degree in co-relation 14604. Up to 4702 conditions per place. [2024-06-28 02:07:03,782 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-28 02:07:03,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 614 flow [2024-06-28 02:07:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:07:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:07:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 02:07:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-28 02:07:03,784 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 252 flow. Second operand 6 states and 155 transitions. [2024-06-28 02:07:03,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 614 flow [2024-06-28 02:07:03,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 107 transitions, 585 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:07:03,788 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 338 flow [2024-06-28 02:07:03,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-28 02:07:03,789 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-28 02:07:03,789 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 338 flow [2024-06-28 02:07:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:03,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:03,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:03,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:07:03,790 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:03,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash 777918500, now seen corresponding path program 2 times [2024-06-28 02:07:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586680484] [2024-06-28 02:07:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:03,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:05,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586680484] [2024-06-28 02:07:05,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586680484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:05,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:05,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:07:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20111308] [2024-06-28 02:07:05,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:07:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:07:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:07:05,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:05,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:05,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:05,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:05,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:07,067 INFO L124 PetriNetUnfolderBase]: 3361/5200 cut-off events. [2024-06-28 02:07:07,068 INFO L125 PetriNetUnfolderBase]: For 9132/9132 co-relation queries the response was YES. [2024-06-28 02:07:07,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 5200 events. 3361/5200 cut-off events. For 9132/9132 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29750 event pairs, 1177 based on Foata normal form. 4/5201 useless extension candidates. Maximal degree in co-relation 15624. Up to 4694 conditions per place. [2024-06-28 02:07:07,093 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-28 02:07:07,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 598 flow [2024-06-28 02:07:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:07:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:07:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:07:07,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-28 02:07:07,095 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 338 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:07:07,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 598 flow [2024-06-28 02:07:07,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 552 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:07:07,104 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 343 flow [2024-06-28 02:07:07,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-28 02:07:07,105 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-28 02:07:07,105 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 343 flow [2024-06-28 02:07:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:07,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:07,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:07:07,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:07,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash 519639458, now seen corresponding path program 1 times [2024-06-28 02:07:07,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:07,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138243928] [2024-06-28 02:07:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:07,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:09,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138243928] [2024-06-28 02:07:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138243928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:09,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:09,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:07:09,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728261605] [2024-06-28 02:07:09,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:09,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:07:09,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:07:09,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:07:09,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:11,105 INFO L124 PetriNetUnfolderBase]: 3353/5199 cut-off events. [2024-06-28 02:07:11,106 INFO L125 PetriNetUnfolderBase]: For 9413/9413 co-relation queries the response was YES. [2024-06-28 02:07:11,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15575 conditions, 5199 events. 3353/5199 cut-off events. For 9413/9413 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29737 event pairs, 1162 based on Foata normal form. 4/5202 useless extension candidates. Maximal degree in co-relation 15553. Up to 4757 conditions per place. [2024-06-28 02:07:11,130 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 83 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-28 02:07:11,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 639 flow [2024-06-28 02:07:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:07:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:07:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:07:11,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-28 02:07:11,132 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 343 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:07:11,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 639 flow [2024-06-28 02:07:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 103 transitions, 581 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:11,138 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 355 flow [2024-06-28 02:07:11,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-28 02:07:11,139 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-28 02:07:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 355 flow [2024-06-28 02:07:11,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:11,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:11,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:07:11,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1357928557, now seen corresponding path program 1 times [2024-06-28 02:07:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841090243] [2024-06-28 02:07:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:13,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841090243] [2024-06-28 02:07:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841090243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:13,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:07:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59915802] [2024-06-28 02:07:13,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:13,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:07:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:07:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:07:13,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:13,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 355 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:13,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:13,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:13,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:14,779 INFO L124 PetriNetUnfolderBase]: 3405/5291 cut-off events. [2024-06-28 02:07:14,780 INFO L125 PetriNetUnfolderBase]: For 12500/12500 co-relation queries the response was YES. [2024-06-28 02:07:14,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16426 conditions, 5291 events. 3405/5291 cut-off events. For 12500/12500 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30456 event pairs, 1241 based on Foata normal form. 4/5294 useless extension candidates. Maximal degree in co-relation 16404. Up to 4813 conditions per place. [2024-06-28 02:07:14,806 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 98 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-06-28 02:07:14,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 123 transitions, 737 flow [2024-06-28 02:07:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:07:14,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-28 02:07:14,811 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 355 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:07:14,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 123 transitions, 737 flow [2024-06-28 02:07:14,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 123 transitions, 691 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:07:14,818 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 400 flow [2024-06-28 02:07:14,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-28 02:07:14,820 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-06-28 02:07:14,820 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 400 flow [2024-06-28 02:07:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:14,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:14,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:07:14,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:14,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1358048527, now seen corresponding path program 2 times [2024-06-28 02:07:14,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:14,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649733110] [2024-06-28 02:07:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:14,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:17,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649733110] [2024-06-28 02:07:17,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649733110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:17,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:17,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:07:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871242656] [2024-06-28 02:07:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:07:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:07:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:07:17,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:17,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:17,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:17,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:17,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:18,683 INFO L124 PetriNetUnfolderBase]: 3457/5385 cut-off events. [2024-06-28 02:07:18,684 INFO L125 PetriNetUnfolderBase]: For 16434/16438 co-relation queries the response was YES. [2024-06-28 02:07:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17731 conditions, 5385 events. 3457/5385 cut-off events. For 16434/16438 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31013 event pairs, 1076 based on Foata normal form. 8/5392 useless extension candidates. Maximal degree in co-relation 17708. Up to 4659 conditions per place. [2024-06-28 02:07:18,710 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 90 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-28 02:07:18,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 886 flow [2024-06-28 02:07:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:07:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:07:18,726 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 400 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:07:18,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 886 flow [2024-06-28 02:07:18,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 825 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:18,736 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 518 flow [2024-06-28 02:07:18,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-28 02:07:18,737 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2024-06-28 02:07:18,738 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 518 flow [2024-06-28 02:07:18,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:18,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:07:18,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1746454805, now seen corresponding path program 1 times [2024-06-28 02:07:18,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141792179] [2024-06-28 02:07:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:21,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141792179] [2024-06-28 02:07:21,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141792179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:21,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:21,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:21,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298429190] [2024-06-28 02:07:21,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:21,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:21,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:21,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:21,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:21,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:21,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:21,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:22,580 INFO L124 PetriNetUnfolderBase]: 3499/5447 cut-off events. [2024-06-28 02:07:22,580 INFO L125 PetriNetUnfolderBase]: For 21424/21428 co-relation queries the response was YES. [2024-06-28 02:07:22,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19048 conditions, 5447 events. 3499/5447 cut-off events. For 21424/21428 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31434 event pairs, 1110 based on Foata normal form. 8/5454 useless extension candidates. Maximal degree in co-relation 19024. Up to 4850 conditions per place. [2024-06-28 02:07:22,638 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 102 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-28 02:07:22,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 918 flow [2024-06-28 02:07:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:07:22,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-28 02:07:22,656 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 518 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:07:22,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 918 flow [2024-06-28 02:07:22,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 860 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 02:07:22,693 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 562 flow [2024-06-28 02:07:22,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-28 02:07:22,694 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 25 predicate places. [2024-06-28 02:07:22,694 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 562 flow [2024-06-28 02:07:22,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:22,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:22,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:07:22,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:22,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 952172525, now seen corresponding path program 3 times [2024-06-28 02:07:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868134703] [2024-06-28 02:07:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:24,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868134703] [2024-06-28 02:07:24,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868134703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:24,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:24,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:07:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260163721] [2024-06-28 02:07:24,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:07:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:07:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:07:24,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:24,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:24,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:24,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:24,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:26,537 INFO L124 PetriNetUnfolderBase]: 3489/5409 cut-off events. [2024-06-28 02:07:26,537 INFO L125 PetriNetUnfolderBase]: For 24771/24771 co-relation queries the response was YES. [2024-06-28 02:07:26,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19669 conditions, 5409 events. 3489/5409 cut-off events. For 24771/24771 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31074 event pairs, 1088 based on Foata normal form. 4/5408 useless extension candidates. Maximal degree in co-relation 19643. Up to 4713 conditions per place. [2024-06-28 02:07:26,563 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 86 selfloop transitions, 35 changer transitions 0/128 dead transitions. [2024-06-28 02:07:26,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 900 flow [2024-06-28 02:07:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:07:26,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:07:26,565 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 562 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:07:26,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 900 flow [2024-06-28 02:07:26,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 796 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:26,582 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 537 flow [2024-06-28 02:07:26,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=537, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-28 02:07:26,582 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-28 02:07:26,583 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 537 flow [2024-06-28 02:07:26,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:26,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:26,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:26,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:07:26,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:26,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1149012241, now seen corresponding path program 2 times [2024-06-28 02:07:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781824358] [2024-06-28 02:07:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781824358] [2024-06-28 02:07:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781824358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:29,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:29,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937206849] [2024-06-28 02:07:29,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:29,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:29,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:29,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:29,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 537 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:29,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:29,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:29,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:30,686 INFO L124 PetriNetUnfolderBase]: 3531/5502 cut-off events. [2024-06-28 02:07:30,687 INFO L125 PetriNetUnfolderBase]: For 26307/26307 co-relation queries the response was YES. [2024-06-28 02:07:30,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20047 conditions, 5502 events. 3531/5502 cut-off events. For 26307/26307 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31734 event pairs, 1122 based on Foata normal form. 4/5503 useless extension candidates. Maximal degree in co-relation 20020. Up to 4898 conditions per place. [2024-06-28 02:07:30,716 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 100 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-28 02:07:30,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 927 flow [2024-06-28 02:07:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:07:30,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-28 02:07:30,718 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 537 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:07:30,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 927 flow [2024-06-28 02:07:30,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 834 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:30,737 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 552 flow [2024-06-28 02:07:30,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-28 02:07:30,738 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-06-28 02:07:30,738 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 552 flow [2024-06-28 02:07:30,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:30,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:30,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:30,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:07:30,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:30,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1157352481, now seen corresponding path program 3 times [2024-06-28 02:07:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:30,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954148990] [2024-06-28 02:07:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954148990] [2024-06-28 02:07:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954148990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:33,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:33,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958505645] [2024-06-28 02:07:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:33,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:33,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 552 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:33,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:33,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:33,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:34,435 INFO L124 PetriNetUnfolderBase]: 3523/5480 cut-off events. [2024-06-28 02:07:34,435 INFO L125 PetriNetUnfolderBase]: For 30360/30360 co-relation queries the response was YES. [2024-06-28 02:07:34,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20480 conditions, 5480 events. 3523/5480 cut-off events. For 30360/30360 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31627 event pairs, 1026 based on Foata normal form. 4/5481 useless extension candidates. Maximal degree in co-relation 20452. Up to 4762 conditions per place. [2024-06-28 02:07:34,462 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 95 selfloop transitions, 32 changer transitions 0/134 dead transitions. [2024-06-28 02:07:34,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 134 transitions, 954 flow [2024-06-28 02:07:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:07:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:07:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:07:34,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-28 02:07:34,486 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 552 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:07:34,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 134 transitions, 954 flow [2024-06-28 02:07:34,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 870 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:34,509 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 598 flow [2024-06-28 02:07:34,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-28 02:07:34,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-28 02:07:34,510 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 598 flow [2024-06-28 02:07:34,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:34,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:34,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:07:34,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:34,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1773823666, now seen corresponding path program 1 times [2024-06-28 02:07:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359042475] [2024-06-28 02:07:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:36,313 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 02:07:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359042475] [2024-06-28 02:07:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359042475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:07:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351261182] [2024-06-28 02:07:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:07:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:07:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:07:36,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:36,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:36,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:36,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:36,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:37,348 INFO L124 PetriNetUnfolderBase]: 3520/5497 cut-off events. [2024-06-28 02:07:37,349 INFO L125 PetriNetUnfolderBase]: For 34317/34317 co-relation queries the response was YES. [2024-06-28 02:07:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21070 conditions, 5497 events. 3520/5497 cut-off events. For 34317/34317 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 31625 event pairs, 1225 based on Foata normal form. 1/5497 useless extension candidates. Maximal degree in co-relation 21041. Up to 5054 conditions per place. [2024-06-28 02:07:37,379 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 100 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-28 02:07:37,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 946 flow [2024-06-28 02:07:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:07:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:07:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-28 02:07:37,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-28 02:07:37,381 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 598 flow. Second operand 5 states and 117 transitions. [2024-06-28 02:07:37,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 946 flow [2024-06-28 02:07:37,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 840 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:37,409 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 594 flow [2024-06-28 02:07:37,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=594, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-28 02:07:37,409 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 31 predicate places. [2024-06-28 02:07:37,410 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 594 flow [2024-06-28 02:07:37,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:37,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:37,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:07:37,410 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:37,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash -846039169, now seen corresponding path program 1 times [2024-06-28 02:07:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:37,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617658977] [2024-06-28 02:07:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:37,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:39,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:39,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617658977] [2024-06-28 02:07:39,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617658977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:39,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:39,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:07:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671632385] [2024-06-28 02:07:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:07:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:07:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:07:39,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:39,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:39,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:39,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:39,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:40,981 INFO L124 PetriNetUnfolderBase]: 3614/5623 cut-off events. [2024-06-28 02:07:40,982 INFO L125 PetriNetUnfolderBase]: For 38248/38248 co-relation queries the response was YES. [2024-06-28 02:07:40,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 5623 events. 3614/5623 cut-off events. For 38248/38248 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 32244 event pairs, 1235 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 22125. Up to 4875 conditions per place. [2024-06-28 02:07:41,013 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 111 selfloop transitions, 24 changer transitions 0/142 dead transitions. [2024-06-28 02:07:41,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1130 flow [2024-06-28 02:07:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:07:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:07:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:07:41,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-28 02:07:41,017 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 594 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:07:41,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1130 flow [2024-06-28 02:07:41,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1104 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-28 02:07:41,048 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 759 flow [2024-06-28 02:07:41,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=759, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-28 02:07:41,048 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2024-06-28 02:07:41,049 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 759 flow [2024-06-28 02:07:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:41,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:41,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:07:41,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:41,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash 462274692, now seen corresponding path program 1 times [2024-06-28 02:07:41,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:41,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159743252] [2024-06-28 02:07:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:42,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159743252] [2024-06-28 02:07:42,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159743252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:42,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953346060] [2024-06-28 02:07:42,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:42,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:42,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:42,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:42,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 759 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:42,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:42,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:42,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:44,666 INFO L124 PetriNetUnfolderBase]: 4112/6329 cut-off events. [2024-06-28 02:07:44,667 INFO L125 PetriNetUnfolderBase]: For 57915/57915 co-relation queries the response was YES. [2024-06-28 02:07:44,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28049 conditions, 6329 events. 4112/6329 cut-off events. For 57915/57915 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 36766 event pairs, 1352 based on Foata normal form. 16/6344 useless extension candidates. Maximal degree in co-relation 28013. Up to 5278 conditions per place. [2024-06-28 02:07:44,704 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 179 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-28 02:07:44,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 224 transitions, 1670 flow [2024-06-28 02:07:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:07:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:07:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-06-28 02:07:44,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:07:44,706 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 759 flow. Second operand 11 states and 286 transitions. [2024-06-28 02:07:44,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 224 transitions, 1670 flow [2024-06-28 02:07:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 224 transitions, 1646 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 02:07:44,751 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1040 flow [2024-06-28 02:07:44,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1040, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-28 02:07:44,752 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-06-28 02:07:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1040 flow [2024-06-28 02:07:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:44,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:44,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:07:44,753 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:44,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1842389184, now seen corresponding path program 2 times [2024-06-28 02:07:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:44,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049053259] [2024-06-28 02:07:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:46,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049053259] [2024-06-28 02:07:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049053259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:46,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:46,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708776439] [2024-06-28 02:07:46,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:46,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:46,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1040 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:46,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:46,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:46,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:48,969 INFO L124 PetriNetUnfolderBase]: 4486/6983 cut-off events. [2024-06-28 02:07:48,969 INFO L125 PetriNetUnfolderBase]: For 76323/76323 co-relation queries the response was YES. [2024-06-28 02:07:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32961 conditions, 6983 events. 4486/6983 cut-off events. For 76323/76323 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 41410 event pairs, 1097 based on Foata normal form. 16/6998 useless extension candidates. Maximal degree in co-relation 32919. Up to 5310 conditions per place. [2024-06-28 02:07:49,013 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 162 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-28 02:07:49,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 209 transitions, 1860 flow [2024-06-28 02:07:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:07:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:07:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-28 02:07:49,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-28 02:07:49,017 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1040 flow. Second operand 9 states and 233 transitions. [2024-06-28 02:07:49,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 209 transitions, 1860 flow [2024-06-28 02:07:49,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 209 transitions, 1797 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:49,097 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1179 flow [2024-06-28 02:07:49,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-28 02:07:49,098 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-06-28 02:07:49,098 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1179 flow [2024-06-28 02:07:49,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:49,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:49,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:49,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:07:49,099 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:49,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:49,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1639085202, now seen corresponding path program 3 times [2024-06-28 02:07:49,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:49,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201045428] [2024-06-28 02:07:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201045428] [2024-06-28 02:07:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201045428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:51,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924663276] [2024-06-28 02:07:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:51,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:51,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:51,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:51,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:51,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:53,375 INFO L124 PetriNetUnfolderBase]: 4414/6867 cut-off events. [2024-06-28 02:07:53,376 INFO L125 PetriNetUnfolderBase]: For 75978/75978 co-relation queries the response was YES. [2024-06-28 02:07:53,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32290 conditions, 6867 events. 4414/6867 cut-off events. For 75978/75978 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40539 event pairs, 1439 based on Foata normal form. 40/6906 useless extension candidates. Maximal degree in co-relation 32246. Up to 5774 conditions per place. [2024-06-28 02:07:53,413 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 157 selfloop transitions, 30 changer transitions 0/194 dead transitions. [2024-06-28 02:07:53,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 194 transitions, 1753 flow [2024-06-28 02:07:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:07:53,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:07:53,415 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1179 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:07:53,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 194 transitions, 1753 flow [2024-06-28 02:07:53,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 194 transitions, 1639 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:53,536 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1137 flow [2024-06-28 02:07:53,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1137, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-28 02:07:53,537 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-28 02:07:53,537 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1137 flow [2024-06-28 02:07:53,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:53,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:53,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:07:53,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:53,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1558601920, now seen corresponding path program 4 times [2024-06-28 02:07:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215724774] [2024-06-28 02:07:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:53,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:56,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215724774] [2024-06-28 02:07:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215724774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:56,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:56,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:56,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890165494] [2024-06-28 02:07:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:56,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:56,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:56,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1137 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:56,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:56,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:56,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:58,149 INFO L124 PetriNetUnfolderBase]: 4604/7177 cut-off events. [2024-06-28 02:07:58,156 INFO L125 PetriNetUnfolderBase]: For 67527/67531 co-relation queries the response was YES. [2024-06-28 02:07:58,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32944 conditions, 7177 events. 4604/7177 cut-off events. For 67527/67531 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 42633 event pairs, 1231 based on Foata normal form. 24/7200 useless extension candidates. Maximal degree in co-relation 32899. Up to 6094 conditions per place. [2024-06-28 02:07:58,203 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 144 selfloop transitions, 45 changer transitions 0/196 dead transitions. [2024-06-28 02:07:58,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 196 transitions, 1767 flow [2024-06-28 02:07:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:07:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:07:58,205 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1137 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:07:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 196 transitions, 1767 flow [2024-06-28 02:07:58,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 196 transitions, 1691 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 02:07:58,280 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1217 flow [2024-06-28 02:07:58,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1217, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-28 02:07:58,280 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 58 predicate places. [2024-06-28 02:07:58,281 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1217 flow [2024-06-28 02:07:58,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:58,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:58,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:58,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:07:58,281 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:58,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1724056604, now seen corresponding path program 1 times [2024-06-28 02:07:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:58,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322904507] [2024-06-28 02:07:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:01,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322904507] [2024-06-28 02:08:01,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322904507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:01,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:01,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557742825] [2024-06-28 02:08:01,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:01,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:01,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1217 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:01,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:01,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:01,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:03,054 INFO L124 PetriNetUnfolderBase]: 4710/7343 cut-off events. [2024-06-28 02:08:03,054 INFO L125 PetriNetUnfolderBase]: For 74861/74865 co-relation queries the response was YES. [2024-06-28 02:08:03,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34380 conditions, 7343 events. 4710/7343 cut-off events. For 74861/74865 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 43951 event pairs, 1189 based on Foata normal form. 16/7358 useless extension candidates. Maximal degree in co-relation 34334. Up to 5578 conditions per place. [2024-06-28 02:08:03,099 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 53 changer transitions 0/200 dead transitions. [2024-06-28 02:08:03,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1871 flow [2024-06-28 02:08:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:08:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:08:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 02:08:03,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:08:03,101 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1217 flow. Second operand 8 states and 208 transitions. [2024-06-28 02:08:03,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1871 flow [2024-06-28 02:08:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1755 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:03,187 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1276 flow [2024-06-28 02:08:03,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-06-28 02:08:03,188 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-28 02:08:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1276 flow [2024-06-28 02:08:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:03,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:03,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:08:03,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:03,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -468850127, now seen corresponding path program 1 times [2024-06-28 02:08:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742463512] [2024-06-28 02:08:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742463512] [2024-06-28 02:08:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742463512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:05,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:05,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:05,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137984905] [2024-06-28 02:08:05,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:05,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:05,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:05,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1276 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:05,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:05,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:05,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:06,847 INFO L124 PetriNetUnfolderBase]: 4756/7421 cut-off events. [2024-06-28 02:08:06,848 INFO L125 PetriNetUnfolderBase]: For 76553/76553 co-relation queries the response was YES. [2024-06-28 02:08:06,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34882 conditions, 7421 events. 4756/7421 cut-off events. For 76553/76553 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 44571 event pairs, 1513 based on Foata normal form. 2/7422 useless extension candidates. Maximal degree in co-relation 34835. Up to 6553 conditions per place. [2024-06-28 02:08:06,903 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 145 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2024-06-28 02:08:06,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 182 transitions, 1922 flow [2024-06-28 02:08:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:08:06,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-28 02:08:06,905 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1276 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:08:06,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 182 transitions, 1922 flow [2024-06-28 02:08:07,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1777 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:07,003 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1232 flow [2024-06-28 02:08:07,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1232, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-28 02:08:07,003 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-28 02:08:07,003 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1232 flow [2024-06-28 02:08:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:07,004 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 02:08:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:08:07,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:07,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 165893952, now seen corresponding path program 5 times [2024-06-28 02:08:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:07,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78687857] [2024-06-28 02:08:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78687857] [2024-06-28 02:08:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78687857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:09,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950657996] [2024-06-28 02:08:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:09,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:09,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:09,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1232 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:09,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:11,485 INFO L124 PetriNetUnfolderBase]: 4846/7573 cut-off events. [2024-06-28 02:08:11,485 INFO L125 PetriNetUnfolderBase]: For 79971/79971 co-relation queries the response was YES. [2024-06-28 02:08:11,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35174 conditions, 7573 events. 4846/7573 cut-off events. For 79971/79971 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 45753 event pairs, 1265 based on Foata normal form. 20/7586 useless extension candidates. Maximal degree in co-relation 35126. Up to 6464 conditions per place. [2024-06-28 02:08:11,534 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2024-06-28 02:08:11,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 1860 flow [2024-06-28 02:08:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:08:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:08:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:08:11,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-28 02:08:11,536 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1232 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:08:11,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 1860 flow [2024-06-28 02:08:11,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 198 transitions, 1809 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 02:08:11,621 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1345 flow [2024-06-28 02:08:11,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-06-28 02:08:11,622 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-28 02:08:11,622 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1345 flow [2024-06-28 02:08:11,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:11,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:11,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:11,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:08:11,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:11,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1932595410, now seen corresponding path program 2 times [2024-06-28 02:08:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:11,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008786422] [2024-06-28 02:08:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:14,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:14,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008786422] [2024-06-28 02:08:14,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008786422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:14,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:14,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:08:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751159106] [2024-06-28 02:08:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:14,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:08:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:08:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:08:14,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:14,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1345 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:14,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:14,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:14,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:16,575 INFO L124 PetriNetUnfolderBase]: 4952/7747 cut-off events. [2024-06-28 02:08:16,576 INFO L125 PetriNetUnfolderBase]: For 90763/90763 co-relation queries the response was YES. [2024-06-28 02:08:16,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36710 conditions, 7747 events. 4952/7747 cut-off events. For 90763/90763 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 47093 event pairs, 1265 based on Foata normal form. 12/7752 useless extension candidates. Maximal degree in co-relation 36662. Up to 6448 conditions per place. [2024-06-28 02:08:16,723 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 49 changer transitions 0/202 dead transitions. [2024-06-28 02:08:16,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 202 transitions, 1997 flow [2024-06-28 02:08:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:08:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:08:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:08:16,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:08:16,732 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1345 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:08:16,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 202 transitions, 1997 flow [2024-06-28 02:08:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 202 transitions, 1873 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:16,832 INFO L231 Difference]: Finished difference. Result has 117 places, 143 transitions, 1396 flow [2024-06-28 02:08:16,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=117, PETRI_TRANSITIONS=143} [2024-06-28 02:08:16,832 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-28 02:08:16,832 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 143 transitions, 1396 flow [2024-06-28 02:08:16,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:16,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:16,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:08:16,833 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:16,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:16,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1924321200, now seen corresponding path program 3 times [2024-06-28 02:08:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176580806] [2024-06-28 02:08:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:19,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176580806] [2024-06-28 02:08:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176580806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:19,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:19,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:08:19,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989393090] [2024-06-28 02:08:19,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:19,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:08:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:08:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:08:19,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:19,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 143 transitions, 1396 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:19,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:19,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:19,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:21,764 INFO L124 PetriNetUnfolderBase]: 4932/7715 cut-off events. [2024-06-28 02:08:21,765 INFO L125 PetriNetUnfolderBase]: For 88504/88504 co-relation queries the response was YES. [2024-06-28 02:08:21,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36078 conditions, 7715 events. 4932/7715 cut-off events. For 88504/88504 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 46741 event pairs, 1120 based on Foata normal form. 12/7720 useless extension candidates. Maximal degree in co-relation 36029. Up to 5254 conditions per place. [2024-06-28 02:08:21,830 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 131 selfloop transitions, 65 changer transitions 0/203 dead transitions. [2024-06-28 02:08:21,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 2014 flow [2024-06-28 02:08:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:08:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:08:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:08:21,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-28 02:08:21,832 INFO L175 Difference]: Start difference. First operand has 117 places, 143 transitions, 1396 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:08:21,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 2014 flow [2024-06-28 02:08:21,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 203 transitions, 1869 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:21,963 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1420 flow [2024-06-28 02:08:21,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-28 02:08:21,964 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-28 02:08:21,964 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1420 flow [2024-06-28 02:08:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:21,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:08:21,965 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:21,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash 27835417, now seen corresponding path program 2 times [2024-06-28 02:08:21,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:21,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392331561] [2024-06-28 02:08:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:21,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:24,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392331561] [2024-06-28 02:08:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392331561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627539730] [2024-06-28 02:08:24,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:24,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:24,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1420 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:24,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:24,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:26,311 INFO L124 PetriNetUnfolderBase]: 4906/7691 cut-off events. [2024-06-28 02:08:26,311 INFO L125 PetriNetUnfolderBase]: For 88898/88898 co-relation queries the response was YES. [2024-06-28 02:08:26,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35927 conditions, 7691 events. 4906/7691 cut-off events. For 88898/88898 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46784 event pairs, 1508 based on Foata normal form. 6/7690 useless extension candidates. Maximal degree in co-relation 35877. Up to 6810 conditions per place. [2024-06-28 02:08:26,358 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 141 selfloop transitions, 29 changer transitions 0/177 dead transitions. [2024-06-28 02:08:26,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1940 flow [2024-06-28 02:08:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 02:08:26,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-28 02:08:26,360 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1420 flow. Second operand 6 states and 146 transitions. [2024-06-28 02:08:26,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1940 flow [2024-06-28 02:08:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 177 transitions, 1757 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:26,462 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1303 flow [2024-06-28 02:08:26,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1303, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-28 02:08:26,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-28 02:08:26,462 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1303 flow [2024-06-28 02:08:26,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:26,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:26,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:08:26,463 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:26,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -462176943, now seen corresponding path program 1 times [2024-06-28 02:08:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:26,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463916433] [2024-06-28 02:08:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:28,570 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 02:08:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463916433] [2024-06-28 02:08:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463916433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:28,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100716639] [2024-06-28 02:08:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:28,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:28,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1303 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:28,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:28,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:30,321 INFO L124 PetriNetUnfolderBase]: 4952/7767 cut-off events. [2024-06-28 02:08:30,321 INFO L125 PetriNetUnfolderBase]: For 84425/84425 co-relation queries the response was YES. [2024-06-28 02:08:30,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35398 conditions, 7767 events. 4952/7767 cut-off events. For 84425/84425 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 47332 event pairs, 1537 based on Foata normal form. 2/7768 useless extension candidates. Maximal degree in co-relation 35347. Up to 7101 conditions per place. [2024-06-28 02:08:30,377 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-28 02:08:30,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2007 flow [2024-06-28 02:08:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 02:08:30,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-28 02:08:30,379 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1303 flow. Second operand 6 states and 146 transitions. [2024-06-28 02:08:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2007 flow [2024-06-28 02:08:30,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 187 transitions, 1939 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 02:08:30,497 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1392 flow [2024-06-28 02:08:30,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1392, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-28 02:08:30,514 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 69 predicate places. [2024-06-28 02:08:30,514 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1392 flow [2024-06-28 02:08:30,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:30,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:30,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:08:30,515 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:30,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash 229863027, now seen corresponding path program 2 times [2024-06-28 02:08:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:30,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448288459] [2024-06-28 02:08:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448288459] [2024-06-28 02:08:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448288459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:32,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:32,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:32,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116284543] [2024-06-28 02:08:32,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:32,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:32,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:32,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:32,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1392 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:32,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:32,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:32,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:34,154 INFO L124 PetriNetUnfolderBase]: 4956/7791 cut-off events. [2024-06-28 02:08:34,154 INFO L125 PetriNetUnfolderBase]: For 89081/89081 co-relation queries the response was YES. [2024-06-28 02:08:34,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36224 conditions, 7791 events. 4956/7791 cut-off events. For 89081/89081 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 47670 event pairs, 1628 based on Foata normal form. 2/7792 useless extension candidates. Maximal degree in co-relation 36171. Up to 7196 conditions per place. [2024-06-28 02:08:34,205 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 161 selfloop transitions, 15 changer transitions 0/183 dead transitions. [2024-06-28 02:08:34,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 1929 flow [2024-06-28 02:08:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 02:08:34,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-28 02:08:34,207 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1392 flow. Second operand 6 states and 138 transitions. [2024-06-28 02:08:34,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 1929 flow [2024-06-28 02:08:34,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1893 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 02:08:34,338 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1474 flow [2024-06-28 02:08:34,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1474, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-06-28 02:08:34,338 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-06-28 02:08:34,338 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1474 flow [2024-06-28 02:08:34,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:34,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:34,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:08:34,339 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:34,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 649628744, now seen corresponding path program 1 times [2024-06-28 02:08:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439513864] [2024-06-28 02:08:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:36,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439513864] [2024-06-28 02:08:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439513864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:36,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:36,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:08:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958140278] [2024-06-28 02:08:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:08:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:08:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:08:36,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:38,815 INFO L124 PetriNetUnfolderBase]: 5304/8251 cut-off events. [2024-06-28 02:08:38,815 INFO L125 PetriNetUnfolderBase]: For 102792/102792 co-relation queries the response was YES. [2024-06-28 02:08:38,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38804 conditions, 8251 events. 5304/8251 cut-off events. For 102792/102792 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 50122 event pairs, 1509 based on Foata normal form. 8/8256 useless extension candidates. Maximal degree in co-relation 38749. Up to 6663 conditions per place. [2024-06-28 02:08:38,884 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 182 selfloop transitions, 41 changer transitions 0/230 dead transitions. [2024-06-28 02:08:38,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 230 transitions, 2583 flow [2024-06-28 02:08:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:08:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:08:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 02:08:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-28 02:08:38,886 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1474 flow. Second operand 8 states and 193 transitions. [2024-06-28 02:08:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 230 transitions, 2583 flow [2024-06-28 02:08:39,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 230 transitions, 2508 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 02:08:39,093 INFO L231 Difference]: Finished difference. Result has 132 places, 176 transitions, 1786 flow [2024-06-28 02:08:39,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1786, PETRI_PLACES=132, PETRI_TRANSITIONS=176} [2024-06-28 02:08:39,094 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 81 predicate places. [2024-06-28 02:08:39,094 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 176 transitions, 1786 flow [2024-06-28 02:08:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:08:39,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:39,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1464178722, now seen corresponding path program 2 times [2024-06-28 02:08:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:39,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945474109] [2024-06-28 02:08:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:41,972 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 02:08:41,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945474109] [2024-06-28 02:08:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945474109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:41,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:08:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5832254] [2024-06-28 02:08:41,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:41,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:08:41,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:08:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:08:42,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:42,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 176 transitions, 1786 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:42,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:42,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:42,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:43,899 INFO L124 PetriNetUnfolderBase]: 5802/8961 cut-off events. [2024-06-28 02:08:43,899 INFO L125 PetriNetUnfolderBase]: For 121608/121608 co-relation queries the response was YES. [2024-06-28 02:08:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44956 conditions, 8961 events. 5802/8961 cut-off events. For 121608/121608 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54400 event pairs, 1585 based on Foata normal form. 12/8968 useless extension candidates. Maximal degree in co-relation 44896. Up to 7334 conditions per place. [2024-06-28 02:08:43,980 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 174 selfloop transitions, 51 changer transitions 0/232 dead transitions. [2024-06-28 02:08:43,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 232 transitions, 2687 flow [2024-06-28 02:08:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:08:43,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-28 02:08:43,983 INFO L175 Difference]: Start difference. First operand has 132 places, 176 transitions, 1786 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:08:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 232 transitions, 2687 flow [2024-06-28 02:08:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 232 transitions, 2625 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-28 02:08:44,203 INFO L231 Difference]: Finished difference. Result has 139 places, 192 transitions, 2109 flow [2024-06-28 02:08:44,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=139, PETRI_TRANSITIONS=192} [2024-06-28 02:08:44,206 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 88 predicate places. [2024-06-28 02:08:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 192 transitions, 2109 flow [2024-06-28 02:08:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:44,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:44,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:08:44,207 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:44,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2138355214, now seen corresponding path program 3 times [2024-06-28 02:08:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:44,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473722721] [2024-06-28 02:08:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:46,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473722721] [2024-06-28 02:08:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473722721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:46,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:46,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:08:46,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623287877] [2024-06-28 02:08:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:46,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:08:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:08:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:08:46,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:46,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 192 transitions, 2109 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:46,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:46,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:46,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:49,130 INFO L124 PetriNetUnfolderBase]: 5974/9197 cut-off events. [2024-06-28 02:08:49,130 INFO L125 PetriNetUnfolderBase]: For 138623/138623 co-relation queries the response was YES. [2024-06-28 02:08:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48857 conditions, 9197 events. 5974/9197 cut-off events. For 138623/138623 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 55857 event pairs, 1552 based on Foata normal form. 12/9204 useless extension candidates. Maximal degree in co-relation 48793. Up to 7466 conditions per place. [2024-06-28 02:08:49,208 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 186 selfloop transitions, 63 changer transitions 0/256 dead transitions. [2024-06-28 02:08:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 256 transitions, 3049 flow [2024-06-28 02:08:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:08:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:08:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-28 02:08:49,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-28 02:08:49,218 INFO L175 Difference]: Start difference. First operand has 139 places, 192 transitions, 2109 flow. Second operand 9 states and 223 transitions. [2024-06-28 02:08:49,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 256 transitions, 3049 flow [2024-06-28 02:08:49,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 256 transitions, 2874 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-28 02:08:49,474 INFO L231 Difference]: Finished difference. Result has 145 places, 200 transitions, 2214 flow [2024-06-28 02:08:49,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2214, PETRI_PLACES=145, PETRI_TRANSITIONS=200} [2024-06-28 02:08:49,475 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-28 02:08:49,475 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 200 transitions, 2214 flow [2024-06-28 02:08:49,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:49,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:49,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:49,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:08:49,476 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:49,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1294756386, now seen corresponding path program 1 times [2024-06-28 02:08:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:49,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493083117] [2024-06-28 02:08:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:52,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:52,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493083117] [2024-06-28 02:08:52,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493083117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:52,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044613889] [2024-06-28 02:08:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:52,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:52,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:52,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 200 transitions, 2214 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:52,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:52,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:52,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:55,087 INFO L124 PetriNetUnfolderBase]: 6181/9582 cut-off events. [2024-06-28 02:08:55,087 INFO L125 PetriNetUnfolderBase]: For 141145/141145 co-relation queries the response was YES. [2024-06-28 02:08:55,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50281 conditions, 9582 events. 6181/9582 cut-off events. For 141145/141145 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59245 event pairs, 1667 based on Foata normal form. 14/9591 useless extension candidates. Maximal degree in co-relation 50215. Up to 8283 conditions per place. [2024-06-28 02:08:55,154 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 201 selfloop transitions, 38 changer transitions 0/246 dead transitions. [2024-06-28 02:08:55,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 246 transitions, 3004 flow [2024-06-28 02:08:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:08:55,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-28 02:08:55,155 INFO L175 Difference]: Start difference. First operand has 145 places, 200 transitions, 2214 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:08:55,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 246 transitions, 3004 flow [2024-06-28 02:08:55,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 246 transitions, 2810 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 02:08:55,390 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2139 flow [2024-06-28 02:08:55,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2139, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-28 02:08:55,391 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-28 02:08:55,391 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2139 flow [2024-06-28 02:08:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:55,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:55,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:08:55,392 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:55,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 542882802, now seen corresponding path program 1 times [2024-06-28 02:08:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303282684] [2024-06-28 02:08:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:57,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:57,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303282684] [2024-06-28 02:08:57,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303282684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:57,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:57,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:08:57,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414035715] [2024-06-28 02:08:57,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:57,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:08:57,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:57,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:08:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:08:57,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:57,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2139 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:57,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:57,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:57,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:59,946 INFO L124 PetriNetUnfolderBase]: 6886/10609 cut-off events. [2024-06-28 02:08:59,946 INFO L125 PetriNetUnfolderBase]: For 151504/151512 co-relation queries the response was YES. [2024-06-28 02:08:59,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55753 conditions, 10609 events. 6886/10609 cut-off events. For 151504/151512 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65906 event pairs, 1798 based on Foata normal form. 10/10618 useless extension candidates. Maximal degree in co-relation 55686. Up to 8042 conditions per place. [2024-06-28 02:09:00,034 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 233 selfloop transitions, 97 changer transitions 0/337 dead transitions. [2024-06-28 02:09:00,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 337 transitions, 4235 flow [2024-06-28 02:09:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 02:09:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877659574468085 [2024-06-28 02:09:00,038 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2139 flow. Second operand 8 states and 221 transitions. [2024-06-28 02:09:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 337 transitions, 4235 flow [2024-06-28 02:09:00,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 337 transitions, 4128 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:00,291 INFO L231 Difference]: Finished difference. Result has 152 places, 254 transitions, 3044 flow [2024-06-28 02:09:00,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3044, PETRI_PLACES=152, PETRI_TRANSITIONS=254} [2024-06-28 02:09:00,292 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 101 predicate places. [2024-06-28 02:09:00,292 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 254 transitions, 3044 flow [2024-06-28 02:09:00,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:09:00,293 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:00,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1575686230, now seen corresponding path program 2 times [2024-06-28 02:09:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540177018] [2024-06-28 02:09:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:02,503 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 02:09:02,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:02,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540177018] [2024-06-28 02:09:02,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540177018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:02,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:02,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11020649] [2024-06-28 02:09:02,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:02,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:02,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:02,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 254 transitions, 3044 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:02,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:02,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:02,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:05,410 INFO L124 PetriNetUnfolderBase]: 7286/11219 cut-off events. [2024-06-28 02:09:05,410 INFO L125 PetriNetUnfolderBase]: For 175318/175326 co-relation queries the response was YES. [2024-06-28 02:09:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63376 conditions, 11219 events. 7286/11219 cut-off events. For 175318/175326 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 70245 event pairs, 1842 based on Foata normal form. 12/11230 useless extension candidates. Maximal degree in co-relation 63304. Up to 8289 conditions per place. [2024-06-28 02:09:05,508 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 122 changer transitions 0/339 dead transitions. [2024-06-28 02:09:05,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 339 transitions, 4629 flow [2024-06-28 02:09:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 02:09:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:09:05,510 INFO L175 Difference]: Start difference. First operand has 152 places, 254 transitions, 3044 flow. Second operand 7 states and 188 transitions. [2024-06-28 02:09:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 339 transitions, 4629 flow [2024-06-28 02:09:05,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 339 transitions, 4535 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-28 02:09:05,862 INFO L231 Difference]: Finished difference. Result has 159 places, 277 transitions, 3649 flow [2024-06-28 02:09:05,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3649, PETRI_PLACES=159, PETRI_TRANSITIONS=277} [2024-06-28 02:09:05,863 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-28 02:09:05,863 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 277 transitions, 3649 flow [2024-06-28 02:09:05,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:05,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:05,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:05,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:09:05,864 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:05,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash 534297084, now seen corresponding path program 3 times [2024-06-28 02:09:05,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:05,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346058415] [2024-06-28 02:09:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:05,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:08,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:08,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346058415] [2024-06-28 02:09:08,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346058415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:08,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:08,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484883170] [2024-06-28 02:09:08,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:08,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:08,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:08,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 277 transitions, 3649 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:08,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:08,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:11,184 INFO L124 PetriNetUnfolderBase]: 7430/11370 cut-off events. [2024-06-28 02:09:11,185 INFO L125 PetriNetUnfolderBase]: For 188052/188052 co-relation queries the response was YES. [2024-06-28 02:09:11,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66793 conditions, 11370 events. 7430/11370 cut-off events. For 188052/188052 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 70679 event pairs, 1832 based on Foata normal form. 6/11375 useless extension candidates. Maximal degree in co-relation 66717. Up to 10057 conditions per place. [2024-06-28 02:09:11,282 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 275 selfloop transitions, 58 changer transitions 0/340 dead transitions. [2024-06-28 02:09:11,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 340 transitions, 4855 flow [2024-06-28 02:09:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:09:11,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-28 02:09:11,284 INFO L175 Difference]: Start difference. First operand has 159 places, 277 transitions, 3649 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:09:11,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 340 transitions, 4855 flow [2024-06-28 02:09:11,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 340 transitions, 4685 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:11,630 INFO L231 Difference]: Finished difference. Result has 162 places, 290 transitions, 3869 flow [2024-06-28 02:09:11,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3869, PETRI_PLACES=162, PETRI_TRANSITIONS=290} [2024-06-28 02:09:11,631 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2024-06-28 02:09:11,631 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 290 transitions, 3869 flow [2024-06-28 02:09:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:11,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:11,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:09:11,632 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:11,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1781787376, now seen corresponding path program 4 times [2024-06-28 02:09:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295599143] [2024-06-28 02:09:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:13,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:13,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295599143] [2024-06-28 02:09:13,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295599143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:13,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:13,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:13,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193287637] [2024-06-28 02:09:13,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:13,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:13,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 290 transitions, 3869 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:13,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:13,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:13,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:16,715 INFO L124 PetriNetUnfolderBase]: 7504/11496 cut-off events. [2024-06-28 02:09:16,715 INFO L125 PetriNetUnfolderBase]: For 191430/191430 co-relation queries the response was YES. [2024-06-28 02:09:16,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66761 conditions, 11496 events. 7504/11496 cut-off events. For 191430/191430 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 71529 event pairs, 1757 based on Foata normal form. 4/11496 useless extension candidates. Maximal degree in co-relation 66685. Up to 8441 conditions per place. [2024-06-28 02:09:16,821 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 231 selfloop transitions, 119 changer transitions 0/357 dead transitions. [2024-06-28 02:09:16,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 357 transitions, 5272 flow [2024-06-28 02:09:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:09:16,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:09:16,823 INFO L175 Difference]: Start difference. First operand has 162 places, 290 transitions, 3869 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:09:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 357 transitions, 5272 flow [2024-06-28 02:09:17,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 357 transitions, 5049 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:17,179 INFO L231 Difference]: Finished difference. Result has 164 places, 296 transitions, 4021 flow [2024-06-28 02:09:17,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4021, PETRI_PLACES=164, PETRI_TRANSITIONS=296} [2024-06-28 02:09:17,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-28 02:09:17,180 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 296 transitions, 4021 flow [2024-06-28 02:09:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:09:17,180 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:17,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1336357240, now seen corresponding path program 5 times [2024-06-28 02:09:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410919876] [2024-06-28 02:09:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410919876] [2024-06-28 02:09:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410919876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:19,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:19,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213433071] [2024-06-28 02:09:19,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:19,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:19,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 296 transitions, 4021 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:19,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:19,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:19,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:22,468 INFO L124 PetriNetUnfolderBase]: 7478/11472 cut-off events. [2024-06-28 02:09:22,468 INFO L125 PetriNetUnfolderBase]: For 197903/197903 co-relation queries the response was YES. [2024-06-28 02:09:22,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67426 conditions, 11472 events. 7478/11472 cut-off events. For 197903/197903 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 71495 event pairs, 1796 based on Foata normal form. 6/11474 useless extension candidates. Maximal degree in co-relation 67349. Up to 8422 conditions per place. [2024-06-28 02:09:22,579 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 230 selfloop transitions, 113 changer transitions 0/350 dead transitions. [2024-06-28 02:09:22,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 350 transitions, 5120 flow [2024-06-28 02:09:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:09:22,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:09:22,580 INFO L175 Difference]: Start difference. First operand has 164 places, 296 transitions, 4021 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:09:22,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 350 transitions, 5120 flow [2024-06-28 02:09:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 350 transitions, 4930 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:23,006 INFO L231 Difference]: Finished difference. Result has 166 places, 296 transitions, 4069 flow [2024-06-28 02:09:23,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4069, PETRI_PLACES=166, PETRI_TRANSITIONS=296} [2024-06-28 02:09:23,007 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 115 predicate places. [2024-06-28 02:09:23,007 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 296 transitions, 4069 flow [2024-06-28 02:09:23,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:23,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:23,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:09:23,007 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:23,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1855088050, now seen corresponding path program 6 times [2024-06-28 02:09:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:23,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964431186] [2024-06-28 02:09:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:23,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:25,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:25,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964431186] [2024-06-28 02:09:25,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964431186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:25,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:25,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032320592] [2024-06-28 02:09:25,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:25,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:25,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:25,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 296 transitions, 4069 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:25,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:25,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:25,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:27,944 INFO L124 PetriNetUnfolderBase]: 7460/11425 cut-off events. [2024-06-28 02:09:27,945 INFO L125 PetriNetUnfolderBase]: For 206694/206694 co-relation queries the response was YES. [2024-06-28 02:09:28,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66904 conditions, 11425 events. 7460/11425 cut-off events. For 206694/206694 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 70963 event pairs, 1796 based on Foata normal form. 6/11423 useless extension candidates. Maximal degree in co-relation 66828. Up to 8999 conditions per place. [2024-06-28 02:09:28,047 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 247 selfloop transitions, 87 changer transitions 0/341 dead transitions. [2024-06-28 02:09:28,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 341 transitions, 5052 flow [2024-06-28 02:09:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:09:28,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-28 02:09:28,049 INFO L175 Difference]: Start difference. First operand has 166 places, 296 transitions, 4069 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:09:28,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 341 transitions, 5052 flow [2024-06-28 02:09:28,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 341 transitions, 4794 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:28,498 INFO L231 Difference]: Finished difference. Result has 167 places, 297 transitions, 4040 flow [2024-06-28 02:09:28,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4040, PETRI_PLACES=167, PETRI_TRANSITIONS=297} [2024-06-28 02:09:28,499 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-28 02:09:28,499 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 297 transitions, 4040 flow [2024-06-28 02:09:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:28,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:28,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:09:28,500 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:28,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1851395040, now seen corresponding path program 7 times [2024-06-28 02:09:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422456076] [2024-06-28 02:09:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422456076] [2024-06-28 02:09:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422456076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:31,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713014594] [2024-06-28 02:09:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:31,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 297 transitions, 4040 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:31,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:31,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:33,835 INFO L124 PetriNetUnfolderBase]: 7408/11365 cut-off events. [2024-06-28 02:09:33,836 INFO L125 PetriNetUnfolderBase]: For 201892/201892 co-relation queries the response was YES. [2024-06-28 02:09:33,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65912 conditions, 11365 events. 7408/11365 cut-off events. For 201892/201892 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 70709 event pairs, 1752 based on Foata normal form. 12/11369 useless extension candidates. Maximal degree in co-relation 65835. Up to 8961 conditions per place. [2024-06-28 02:09:33,930 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 257 selfloop transitions, 96 changer transitions 0/360 dead transitions. [2024-06-28 02:09:33,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 360 transitions, 5080 flow [2024-06-28 02:09:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:09:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:09:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-28 02:09:33,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2024-06-28 02:09:33,932 INFO L175 Difference]: Start difference. First operand has 167 places, 297 transitions, 4040 flow. Second operand 9 states and 221 transitions. [2024-06-28 02:09:33,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 360 transitions, 5080 flow [2024-06-28 02:09:34,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 360 transitions, 4844 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:34,442 INFO L231 Difference]: Finished difference. Result has 172 places, 297 transitions, 4018 flow [2024-06-28 02:09:34,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3804, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4018, PETRI_PLACES=172, PETRI_TRANSITIONS=297} [2024-06-28 02:09:34,443 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-28 02:09:34,443 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 297 transitions, 4018 flow [2024-06-28 02:09:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:34,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:34,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:09:34,443 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:34,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1339205272, now seen corresponding path program 1 times [2024-06-28 02:09:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:34,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427690948] [2024-06-28 02:09:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427690948] [2024-06-28 02:09:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427690948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:37,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:37,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770259920] [2024-06-28 02:09:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:37,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:37,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 297 transitions, 4018 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:37,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:37,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:37,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:40,012 INFO L124 PetriNetUnfolderBase]: 7446/11464 cut-off events. [2024-06-28 02:09:40,012 INFO L125 PetriNetUnfolderBase]: For 199097/199097 co-relation queries the response was YES. [2024-06-28 02:09:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65744 conditions, 11464 events. 7446/11464 cut-off events. For 199097/199097 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 72110 event pairs, 2393 based on Foata normal form. 2/11465 useless extension candidates. Maximal degree in co-relation 65666. Up to 10377 conditions per place. [2024-06-28 02:09:40,109 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 315 selfloop transitions, 27 changer transitions 0/349 dead transitions. [2024-06-28 02:09:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 349 transitions, 5190 flow [2024-06-28 02:09:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:09:40,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-28 02:09:40,111 INFO L175 Difference]: Start difference. First operand has 172 places, 297 transitions, 4018 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:09:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 349 transitions, 5190 flow [2024-06-28 02:09:40,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 349 transitions, 4751 flow, removed 82 selfloop flow, removed 9 redundant places. [2024-06-28 02:09:40,560 INFO L231 Difference]: Finished difference. Result has 171 places, 302 transitions, 3766 flow [2024-06-28 02:09:40,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3766, PETRI_PLACES=171, PETRI_TRANSITIONS=302} [2024-06-28 02:09:40,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-28 02:09:40,561 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 302 transitions, 3766 flow [2024-06-28 02:09:40,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:40,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:40,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:40,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:09:40,561 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:40,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1770465928, now seen corresponding path program 2 times [2024-06-28 02:09:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53731496] [2024-06-28 02:09:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:43,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53731496] [2024-06-28 02:09:43,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53731496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:43,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248721849] [2024-06-28 02:09:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:43,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:43,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 302 transitions, 3766 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:43,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:43,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:43,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:46,413 INFO L124 PetriNetUnfolderBase]: 7484/11518 cut-off events. [2024-06-28 02:09:46,413 INFO L125 PetriNetUnfolderBase]: For 189346/189346 co-relation queries the response was YES. [2024-06-28 02:09:46,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64302 conditions, 11518 events. 7484/11518 cut-off events. For 189346/189346 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 72542 event pairs, 2473 based on Foata normal form. 2/11519 useless extension candidates. Maximal degree in co-relation 64222. Up to 10528 conditions per place. [2024-06-28 02:09:46,510 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 314 selfloop transitions, 24 changer transitions 0/345 dead transitions. [2024-06-28 02:09:46,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 345 transitions, 4728 flow [2024-06-28 02:09:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 02:09:46,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-28 02:09:46,517 INFO L175 Difference]: Start difference. First operand has 171 places, 302 transitions, 3766 flow. Second operand 7 states and 166 transitions. [2024-06-28 02:09:46,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 345 transitions, 4728 flow [2024-06-28 02:09:46,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 345 transitions, 4654 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:46,918 INFO L231 Difference]: Finished difference. Result has 175 places, 304 transitions, 3791 flow [2024-06-28 02:09:46,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3791, PETRI_PLACES=175, PETRI_TRANSITIONS=304} [2024-06-28 02:09:46,919 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-06-28 02:09:46,919 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 304 transitions, 3791 flow [2024-06-28 02:09:46,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:46,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:46,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:09:46,920 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:46,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1855096978, now seen corresponding path program 3 times [2024-06-28 02:09:46,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:46,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986111599] [2024-06-28 02:09:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:46,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:49,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986111599] [2024-06-28 02:09:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986111599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:49,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:49,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:49,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307540607] [2024-06-28 02:09:49,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:49,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:49,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:49,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:49,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 304 transitions, 3791 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:49,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:49,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:49,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:52,543 INFO L124 PetriNetUnfolderBase]: 7487/11586 cut-off events. [2024-06-28 02:09:52,543 INFO L125 PetriNetUnfolderBase]: For 190677/190677 co-relation queries the response was YES. [2024-06-28 02:09:52,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64313 conditions, 11586 events. 7487/11586 cut-off events. For 190677/190677 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 73690 event pairs, 2720 based on Foata normal form. 2/11587 useless extension candidates. Maximal degree in co-relation 64231. Up to 10625 conditions per place. [2024-06-28 02:09:52,685 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 316 selfloop transitions, 18 changer transitions 0/341 dead transitions. [2024-06-28 02:09:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 341 transitions, 4677 flow [2024-06-28 02:09:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 02:09:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48328267477203646 [2024-06-28 02:09:52,692 INFO L175 Difference]: Start difference. First operand has 175 places, 304 transitions, 3791 flow. Second operand 7 states and 159 transitions. [2024-06-28 02:09:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 341 transitions, 4677 flow [2024-06-28 02:09:53,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 341 transitions, 4602 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:53,336 INFO L231 Difference]: Finished difference. Result has 177 places, 307 transitions, 3840 flow [2024-06-28 02:09:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3840, PETRI_PLACES=177, PETRI_TRANSITIONS=307} [2024-06-28 02:09:53,337 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2024-06-28 02:09:53,337 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 307 transitions, 3840 flow [2024-06-28 02:09:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:53,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:53,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:53,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:09:53,337 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:53,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1958386061, now seen corresponding path program 1 times [2024-06-28 02:09:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:53,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390787108] [2024-06-28 02:09:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:53,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390787108] [2024-06-28 02:09:56,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390787108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:56,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911025669] [2024-06-28 02:09:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:56,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:09:56,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 307 transitions, 3840 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:56,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:56,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:09:56,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:59,488 INFO L124 PetriNetUnfolderBase]: 7737/11986 cut-off events. [2024-06-28 02:09:59,488 INFO L125 PetriNetUnfolderBase]: For 208254/208254 co-relation queries the response was YES. [2024-06-28 02:09:59,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66425 conditions, 11986 events. 7737/11986 cut-off events. For 208254/208254 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 76440 event pairs, 1931 based on Foata normal form. 14/11992 useless extension candidates. Maximal degree in co-relation 66342. Up to 10314 conditions per place. [2024-06-28 02:09:59,629 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 308 selfloop transitions, 44 changer transitions 0/359 dead transitions. [2024-06-28 02:09:59,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 359 transitions, 4934 flow [2024-06-28 02:09:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:09:59,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-28 02:09:59,649 INFO L175 Difference]: Start difference. First operand has 177 places, 307 transitions, 3840 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:09:59,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 359 transitions, 4934 flow [2024-06-28 02:10:00,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 359 transitions, 4848 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:10:00,104 INFO L231 Difference]: Finished difference. Result has 179 places, 309 transitions, 3882 flow [2024-06-28 02:10:00,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3882, PETRI_PLACES=179, PETRI_TRANSITIONS=309} [2024-06-28 02:10:00,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 128 predicate places. [2024-06-28 02:10:00,105 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 309 transitions, 3882 flow [2024-06-28 02:10:00,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:00,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:00,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:10:00,105 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:00,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:00,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1972670861, now seen corresponding path program 2 times [2024-06-28 02:10:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096121973] [2024-06-28 02:10:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:03,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:03,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096121973] [2024-06-28 02:10:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096121973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:03,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937144238] [2024-06-28 02:10:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:03,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:03,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 309 transitions, 3882 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:03,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:03,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:05,923 INFO L124 PetriNetUnfolderBase]: 7984/12320 cut-off events. [2024-06-28 02:10:05,924 INFO L125 PetriNetUnfolderBase]: For 222043/222043 co-relation queries the response was YES. [2024-06-28 02:10:06,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69447 conditions, 12320 events. 7984/12320 cut-off events. For 222043/222043 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 78274 event pairs, 1978 based on Foata normal form. 8/12322 useless extension candidates. Maximal degree in co-relation 69363. Up to 10032 conditions per place. [2024-06-28 02:10:06,086 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 312 selfloop transitions, 46 changer transitions 0/365 dead transitions. [2024-06-28 02:10:06,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 365 transitions, 5108 flow [2024-06-28 02:10:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:10:06,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-28 02:10:06,096 INFO L175 Difference]: Start difference. First operand has 179 places, 309 transitions, 3882 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:10:06,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 365 transitions, 5108 flow [2024-06-28 02:10:06,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 365 transitions, 5022 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:10:06,674 INFO L231 Difference]: Finished difference. Result has 183 places, 312 transitions, 3942 flow [2024-06-28 02:10:06,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3942, PETRI_PLACES=183, PETRI_TRANSITIONS=312} [2024-06-28 02:10:06,675 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 132 predicate places. [2024-06-28 02:10:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 312 transitions, 3942 flow [2024-06-28 02:10:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:06,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:06,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:10:06,677 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:06,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash 72143421, now seen corresponding path program 1 times [2024-06-28 02:10:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816422437] [2024-06-28 02:10:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816422437] [2024-06-28 02:10:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816422437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:10,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:10,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47122412] [2024-06-28 02:10:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:10,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:10,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:10,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 312 transitions, 3942 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:10,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:10,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:10,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:13,425 INFO L124 PetriNetUnfolderBase]: 8771/13445 cut-off events. [2024-06-28 02:10:13,426 INFO L125 PetriNetUnfolderBase]: For 277449/277449 co-relation queries the response was YES. [2024-06-28 02:10:13,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77393 conditions, 13445 events. 8771/13445 cut-off events. For 277449/277449 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 86000 event pairs, 1993 based on Foata normal form. 16/13457 useless extension candidates. Maximal degree in co-relation 77308. Up to 8173 conditions per place. [2024-06-28 02:10:13,592 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 273 selfloop transitions, 116 changer transitions 0/396 dead transitions. [2024-06-28 02:10:13,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 396 transitions, 5541 flow [2024-06-28 02:10:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-28 02:10:13,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-28 02:10:13,594 INFO L175 Difference]: Start difference. First operand has 183 places, 312 transitions, 3942 flow. Second operand 8 states and 212 transitions. [2024-06-28 02:10:13,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 396 transitions, 5541 flow [2024-06-28 02:10:14,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 396 transitions, 5486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:10:14,534 INFO L231 Difference]: Finished difference. Result has 190 places, 318 transitions, 4324 flow [2024-06-28 02:10:14,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4324, PETRI_PLACES=190, PETRI_TRANSITIONS=318} [2024-06-28 02:10:14,535 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 139 predicate places. [2024-06-28 02:10:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 318 transitions, 4324 flow [2024-06-28 02:10:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:14,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:14,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:10:14,555 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:14,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1436189231, now seen corresponding path program 2 times [2024-06-28 02:10:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:14,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610554034] [2024-06-28 02:10:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:14,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:18,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610554034] [2024-06-28 02:10:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610554034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:18,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169937153] [2024-06-28 02:10:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:18,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:18,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:18,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 318 transitions, 4324 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:18,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:18,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:18,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:21,729 INFO L124 PetriNetUnfolderBase]: 9195/14093 cut-off events. [2024-06-28 02:10:21,729 INFO L125 PetriNetUnfolderBase]: For 322466/322466 co-relation queries the response was YES. [2024-06-28 02:10:21,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84343 conditions, 14093 events. 9195/14093 cut-off events. For 322466/322466 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 90630 event pairs, 2192 based on Foata normal form. 24/14113 useless extension candidates. Maximal degree in co-relation 84254. Up to 10481 conditions per place. [2024-06-28 02:10:21,884 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 259 selfloop transitions, 120 changer transitions 0/386 dead transitions. [2024-06-28 02:10:21,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 386 transitions, 5540 flow [2024-06-28 02:10:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:10:21,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:10:21,886 INFO L175 Difference]: Start difference. First operand has 190 places, 318 transitions, 4324 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:10:21,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 386 transitions, 5540 flow [2024-06-28 02:10:22,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 386 transitions, 5398 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 02:10:22,969 INFO L231 Difference]: Finished difference. Result has 195 places, 320 transitions, 4475 flow [2024-06-28 02:10:22,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4475, PETRI_PLACES=195, PETRI_TRANSITIONS=320} [2024-06-28 02:10:22,971 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-28 02:10:22,972 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 320 transitions, 4475 flow [2024-06-28 02:10:22,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:22,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:22,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:10:22,972 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:22,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 950133113, now seen corresponding path program 3 times [2024-06-28 02:10:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961675671] [2024-06-28 02:10:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961675671] [2024-06-28 02:10:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961675671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:26,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264633935] [2024-06-28 02:10:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:26,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:26,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:26,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 320 transitions, 4475 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:26,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:26,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:26,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:29,845 INFO L124 PetriNetUnfolderBase]: 9760/14896 cut-off events. [2024-06-28 02:10:29,846 INFO L125 PetriNetUnfolderBase]: For 352062/352062 co-relation queries the response was YES. [2024-06-28 02:10:29,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92097 conditions, 14896 events. 9760/14896 cut-off events. For 352062/352062 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 96543 event pairs, 2171 based on Foata normal form. 16/14908 useless extension candidates. Maximal degree in co-relation 92006. Up to 10411 conditions per place. [2024-06-28 02:10:30,052 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 115 changer transitions 0/393 dead transitions. [2024-06-28 02:10:30,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 393 transitions, 5842 flow [2024-06-28 02:10:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:10:30,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-28 02:10:30,054 INFO L175 Difference]: Start difference. First operand has 195 places, 320 transitions, 4475 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:10:30,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 393 transitions, 5842 flow [2024-06-28 02:10:31,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 393 transitions, 5590 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:31,275 INFO L231 Difference]: Finished difference. Result has 198 places, 324 transitions, 4564 flow [2024-06-28 02:10:31,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=198, PETRI_TRANSITIONS=324} [2024-06-28 02:10:31,276 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-28 02:10:31,276 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 324 transitions, 4564 flow [2024-06-28 02:10:31,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:31,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:31,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:10:31,277 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:31,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1872883163, now seen corresponding path program 4 times [2024-06-28 02:10:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:31,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890147856] [2024-06-28 02:10:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:34,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:34,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890147856] [2024-06-28 02:10:34,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890147856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:34,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:34,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599935786] [2024-06-28 02:10:34,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:34,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:34,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 324 transitions, 4564 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:34,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:34,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:34,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:38,918 INFO L124 PetriNetUnfolderBase]: 10876/16726 cut-off events. [2024-06-28 02:10:38,918 INFO L125 PetriNetUnfolderBase]: For 443285/443285 co-relation queries the response was YES. [2024-06-28 02:10:39,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101475 conditions, 16726 events. 10876/16726 cut-off events. For 443285/443285 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 110930 event pairs, 2632 based on Foata normal form. 68/16788 useless extension candidates. Maximal degree in co-relation 101382. Up to 12533 conditions per place. [2024-06-28 02:10:39,130 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 284 selfloop transitions, 110 changer transitions 0/401 dead transitions. [2024-06-28 02:10:39,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 401 transitions, 5827 flow [2024-06-28 02:10:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:10:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:10:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-28 02:10:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-28 02:10:39,132 INFO L175 Difference]: Start difference. First operand has 198 places, 324 transitions, 4564 flow. Second operand 11 states and 264 transitions. [2024-06-28 02:10:39,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 401 transitions, 5827 flow [2024-06-28 02:10:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 401 transitions, 5667 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 02:10:40,357 INFO L231 Difference]: Finished difference. Result has 205 places, 327 transitions, 4737 flow [2024-06-28 02:10:40,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4737, PETRI_PLACES=205, PETRI_TRANSITIONS=327} [2024-06-28 02:10:40,358 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2024-06-28 02:10:40,358 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 327 transitions, 4737 flow [2024-06-28 02:10:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:40,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:40,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:10:40,358 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:40,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1972677805, now seen corresponding path program 1 times [2024-06-28 02:10:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279723724] [2024-06-28 02:10:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:43,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279723724] [2024-06-28 02:10:43,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279723724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:43,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:43,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:43,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144226501] [2024-06-28 02:10:43,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:43,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:43,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:43,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 327 transitions, 4737 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:43,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:43,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:43,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:49,023 INFO L124 PetriNetUnfolderBase]: 12962/19863 cut-off events. [2024-06-28 02:10:49,024 INFO L125 PetriNetUnfolderBase]: For 549629/549629 co-relation queries the response was YES. [2024-06-28 02:10:49,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121328 conditions, 19863 events. 12962/19863 cut-off events. For 549629/549629 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 134449 event pairs, 2816 based on Foata normal form. 56/19911 useless extension candidates. Maximal degree in co-relation 121233. Up to 12431 conditions per place. [2024-06-28 02:10:49,258 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 293 selfloop transitions, 116 changer transitions 0/416 dead transitions. [2024-06-28 02:10:49,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 416 transitions, 6293 flow [2024-06-28 02:10:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:10:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:10:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-28 02:10:49,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:10:49,260 INFO L175 Difference]: Start difference. First operand has 205 places, 327 transitions, 4737 flow. Second operand 10 states and 255 transitions. [2024-06-28 02:10:49,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 416 transitions, 6293 flow [2024-06-28 02:10:51,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 416 transitions, 6013 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-28 02:10:51,036 INFO L231 Difference]: Finished difference. Result has 207 places, 336 transitions, 4969 flow [2024-06-28 02:10:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4969, PETRI_PLACES=207, PETRI_TRANSITIONS=336} [2024-06-28 02:10:51,037 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-28 02:10:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 336 transitions, 4969 flow [2024-06-28 02:10:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:51,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:51,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:51,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:10:51,038 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:51,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1765607353, now seen corresponding path program 5 times [2024-06-28 02:10:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128105872] [2024-06-28 02:10:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128105872] [2024-06-28 02:10:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128105872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:54,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:54,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:54,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539471971] [2024-06-28 02:10:54,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:54,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:54,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:54,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:54,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:10:54,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 336 transitions, 4969 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:54,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:54,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:10:54,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:00,088 INFO L124 PetriNetUnfolderBase]: 12814/19921 cut-off events. [2024-06-28 02:11:00,088 INFO L125 PetriNetUnfolderBase]: For 499711/499711 co-relation queries the response was YES. [2024-06-28 02:11:00,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117455 conditions, 19921 events. 12814/19921 cut-off events. For 499711/499711 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 137625 event pairs, 3467 based on Foata normal form. 68/19981 useless extension candidates. Maximal degree in co-relation 117358. Up to 15443 conditions per place. [2024-06-28 02:11:00,388 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 289 selfloop transitions, 98 changer transitions 0/394 dead transitions. [2024-06-28 02:11:00,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 394 transitions, 6074 flow [2024-06-28 02:11:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:11:00,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-28 02:11:00,390 INFO L175 Difference]: Start difference. First operand has 207 places, 336 transitions, 4969 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:11:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 394 transitions, 6074 flow [2024-06-28 02:11:02,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 394 transitions, 5749 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:02,684 INFO L231 Difference]: Finished difference. Result has 209 places, 337 transitions, 4901 flow [2024-06-28 02:11:02,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4901, PETRI_PLACES=209, PETRI_TRANSITIONS=337} [2024-06-28 02:11:02,685 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-28 02:11:02,685 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 337 transitions, 4901 flow [2024-06-28 02:11:02,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:02,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:02,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:02,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:11:02,686 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:02,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1765603633, now seen corresponding path program 6 times [2024-06-28 02:11:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:02,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347344849] [2024-06-28 02:11:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:06,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347344849] [2024-06-28 02:11:06,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347344849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:06,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:06,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:06,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509401294] [2024-06-28 02:11:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:06,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:06,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:11:06,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 337 transitions, 4901 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:06,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:11:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:12,235 INFO L124 PetriNetUnfolderBase]: 14661/22586 cut-off events. [2024-06-28 02:11:12,236 INFO L125 PetriNetUnfolderBase]: For 539787/539787 co-relation queries the response was YES. [2024-06-28 02:11:12,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129089 conditions, 22586 events. 14661/22586 cut-off events. For 539787/539787 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 157096 event pairs, 3567 based on Foata normal form. 56/22634 useless extension candidates. Maximal degree in co-relation 128990. Up to 13192 conditions per place. [2024-06-28 02:11:12,683 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 305 selfloop transitions, 95 changer transitions 0/407 dead transitions. [2024-06-28 02:11:12,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 407 transitions, 6323 flow [2024-06-28 02:11:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:11:12,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-28 02:11:12,685 INFO L175 Difference]: Start difference. First operand has 209 places, 337 transitions, 4901 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:11:12,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 407 transitions, 6323 flow [2024-06-28 02:11:14,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 407 transitions, 6127 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:14,121 INFO L231 Difference]: Finished difference. Result has 212 places, 343 transitions, 5153 flow [2024-06-28 02:11:14,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5153, PETRI_PLACES=212, PETRI_TRANSITIONS=343} [2024-06-28 02:11:14,122 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2024-06-28 02:11:14,122 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 343 transitions, 5153 flow [2024-06-28 02:11:14,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:14,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:14,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:14,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:11:14,128 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:14,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1039069860, now seen corresponding path program 1 times [2024-06-28 02:11:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:14,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795722371] [2024-06-28 02:11:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795722371] [2024-06-28 02:11:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795722371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:14,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:14,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:11:14,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522106895] [2024-06-28 02:11:14,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:14,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:11:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:11:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:11:14,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-28 02:11:14,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 343 transitions, 5153 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:14,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-28 02:11:14,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:18,110 INFO L124 PetriNetUnfolderBase]: 11238/17639 cut-off events. [2024-06-28 02:11:18,110 INFO L125 PetriNetUnfolderBase]: For 452247/452588 co-relation queries the response was YES. [2024-06-28 02:11:18,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100844 conditions, 17639 events. 11238/17639 cut-off events. For 452247/452588 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 124370 event pairs, 1873 based on Foata normal form. 785/18121 useless extension candidates. Maximal degree in co-relation 100744. Up to 8005 conditions per place. [2024-06-28 02:11:18,307 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 211 selfloop transitions, 71 changer transitions 0/349 dead transitions. [2024-06-28 02:11:18,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 349 transitions, 5684 flow [2024-06-28 02:11:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:11:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:11:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-28 02:11:18,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-28 02:11:18,310 INFO L175 Difference]: Start difference. First operand has 212 places, 343 transitions, 5153 flow. Second operand 4 states and 118 transitions. [2024-06-28 02:11:18,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 349 transitions, 5684 flow [2024-06-28 02:11:19,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 349 transitions, 5125 flow, removed 185 selfloop flow, removed 10 redundant places. [2024-06-28 02:11:19,446 INFO L231 Difference]: Finished difference. Result has 207 places, 291 transitions, 4170 flow [2024-06-28 02:11:19,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4170, PETRI_PLACES=207, PETRI_TRANSITIONS=291} [2024-06-28 02:11:19,446 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-28 02:11:19,446 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 291 transitions, 4170 flow [2024-06-28 02:11:19,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:19,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:19,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:11:19,447 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:19,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 328024023, now seen corresponding path program 1 times [2024-06-28 02:11:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708285785] [2024-06-28 02:11:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:22,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:22,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708285785] [2024-06-28 02:11:22,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708285785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:22,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:22,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:22,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357829962] [2024-06-28 02:11:22,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:22,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:22,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:11:22,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 291 transitions, 4170 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:22,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:22,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:11:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand