./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:50:34,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:50:34,986 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:50:34,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:50:34,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:50:35,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:50:35,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:50:35,024 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:50:35,024 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:50:35,027 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:50:35,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:50:35,028 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:50:35,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:50:35,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:50:35,029 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:50:35,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:50:35,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:50:35,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:50:35,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:50:35,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:50:35,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:50:35,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:50:35,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:50:35,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:50:35,032 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:50:35,032 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:50:35,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:50:35,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:50:35,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:50:35,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:50:35,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:50:35,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:50:35,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:50:35,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:50:35,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:50:35,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:50:35,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:50:35,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:50:35,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:50:35,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:50:35,036 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:50:35,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:50:35,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:50:35,036 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:50:35,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:50:35,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:50:35,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:50:35,285 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:50:35,285 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:50:35,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml [2024-06-28 01:50:35,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:50:35,512 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:50:35,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-28 01:50:36,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:50:36,743 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:50:36,743 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-28 01:50:36,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7354063/1e8513b370ee425f99be10486f57c88f/FLAGb25f90e79 [2024-06-28 01:50:36,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7354063/1e8513b370ee425f99be10486f57c88f [2024-06-28 01:50:36,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:50:36,773 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:50:36,774 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:50:36,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:50:36,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:50:36,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:50:35" (1/2) ... [2024-06-28 01:50:36,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d74f4b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:50:36, skipping insertion in model container [2024-06-28 01:50:36,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:50:35" (1/2) ... [2024-06-28 01:50:36,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67646fc0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:50:36, skipping insertion in model container [2024-06-28 01:50:36,781 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:50:36" (2/2) ... [2024-06-28 01:50:36,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d74f4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:36, skipping insertion in model container [2024-06-28 01:50:36,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:50:36" (2/2) ... [2024-06-28 01:50:36,782 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:50:36,917 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:50:36,918 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 01:50:36,918 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 01:50:36,918 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 01:50:36,919 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:50:36,919 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-28 01:50:36,957 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:50:37,140 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/safe001_power.oepc.i[995,1008] [2024-06-28 01:50:37,330 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:50:37,356 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:50:37,385 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/safe001_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:50:37,492 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:50:37,527 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:50:37,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37 WrapperNode [2024-06-28 01:50:37,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:50:37,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:50:37,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:50:37,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:50:37,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,662 INFO L138 Inliner]: procedures = 175, calls = 108, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 280 [2024-06-28 01:50:37,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:50:37,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:50:37,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:50:37,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:50:37,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,687 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,706 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 01:50:37,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,706 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:50:37,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:50:37,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:50:37,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:50:37,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (1/1) ... [2024-06-28 01:50:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:50:37,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:50:37,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:50:37,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:50:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:50:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:50:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:50:37,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:50:37,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:50:37,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:50:37,847 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:50:37,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:50:37,847 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:50:37,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:50:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:50:37,848 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:50:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:50:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:50:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:50:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:50:37,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:50:37,851 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:50:37,963 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:50:37,965 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:50:38,473 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:50:38,473 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:50:38,991 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:50:38,991 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:50:38,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:50:38 BoogieIcfgContainer [2024-06-28 01:50:38,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:50:38,994 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:50:38,994 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:50:38,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:50:38,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:50:35" (1/4) ... [2024-06-28 01:50:38,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f34c8b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:50:38, skipping insertion in model container [2024-06-28 01:50:38,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:50:36" (2/4) ... [2024-06-28 01:50:38,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f34c8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:50:38, skipping insertion in model container [2024-06-28 01:50:38,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:50:37" (3/4) ... [2024-06-28 01:50:38,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f34c8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:50:38, skipping insertion in model container [2024-06-28 01:50:38,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:50:38" (4/4) ... [2024-06-28 01:50:38,999 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-28 01:50:39,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:50:39,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:50:39,038 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:50:39,091 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:50:39,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:50:39,152 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-28 01:50:39,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:50:39,156 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 60 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 01:50:39,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:50:39,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-28 01:50:39,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:50:39,181 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;@2c73568c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:50:39,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:50:39,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:50:39,186 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 01:50:39,186 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:50:39,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:39,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:50:39,188 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 01:50:39,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 993812731, now seen corresponding path program 1 times [2024-06-28 01:50:39,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:39,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312528947] [2024-06-28 01:50:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:39,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:40,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:40,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312528947] [2024-06-28 01:50:40,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312528947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:50:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531428595] [2024-06-28 01:50:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:50:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:50:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:50:41,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:50:41,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:41,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:50:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:42,199 INFO L124 PetriNetUnfolderBase]: 4073/6249 cut-off events. [2024-06-28 01:50:42,200 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 01:50:42,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12191 conditions, 6249 events. 4073/6249 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35975 event pairs, 2411 based on Foata normal form. 0/6036 useless extension candidates. Maximal degree in co-relation 12179. Up to 5840 conditions per place. [2024-06-28 01:50:42,235 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-28 01:50:42,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 237 flow [2024-06-28 01:50:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:50:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:50:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-28 01:50:42,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-06-28 01:50:42,247 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 88 transitions. [2024-06-28 01:50:42,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 237 flow [2024-06-28 01:50:42,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:50:42,254 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-28 01:50:42,256 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 01:50:42,259 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-28 01:50:42,259 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-28 01:50:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:42,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:42,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:50:42,261 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 01:50:42,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1571778044, now seen corresponding path program 1 times [2024-06-28 01:50:42,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:42,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047020383] [2024-06-28 01:50:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:42,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047020383] [2024-06-28 01:50:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047020383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:44,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:50:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793869232] [2024-06-28 01:50:44,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:50:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:50:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:50:44,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:50:44,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:44,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:44,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:50:44,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:45,549 INFO L124 PetriNetUnfolderBase]: 4064/5956 cut-off events. [2024-06-28 01:50:45,549 INFO L125 PetriNetUnfolderBase]: For 948/948 co-relation queries the response was YES. [2024-06-28 01:50:45,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 5956 events. 4064/5956 cut-off events. For 948/948 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32520 event pairs, 1754 based on Foata normal form. 4/5959 useless extension candidates. Maximal degree in co-relation 13216. Up to 5767 conditions per place. [2024-06-28 01:50:45,575 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-28 01:50:45,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 369 flow [2024-06-28 01:50:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:50:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:50:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-28 01:50:45,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-28 01:50:45,578 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 119 transitions. [2024-06-28 01:50:45,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 369 flow [2024-06-28 01:50:45,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:50:45,582 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-28 01:50:45,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 01:50:45,583 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-28 01:50:45,583 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-28 01:50:45,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:45,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:45,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:45,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:50:45,584 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 01:50:45,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1480480757, now seen corresponding path program 1 times [2024-06-28 01:50:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:45,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815562051] [2024-06-28 01:50:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:47,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:47,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815562051] [2024-06-28 01:50:47,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815562051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:47,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:50:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236665064] [2024-06-28 01:50:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:47,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:50:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:50:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:50:47,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:50:47,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:47,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:47,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:50:47,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:48,964 INFO L124 PetriNetUnfolderBase]: 4114/6001 cut-off events. [2024-06-28 01:50:48,965 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2024-06-28 01:50:48,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14885 conditions, 6001 events. 4114/6001 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32867 event pairs, 1206 based on Foata normal form. 7/6006 useless extension candidates. Maximal degree in co-relation 14870. Up to 5559 conditions per place. [2024-06-28 01:50:48,997 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 89 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-28 01:50:48,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 114 transitions, 584 flow [2024-06-28 01:50:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:50:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:50:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 01:50:48,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6680851063829787 [2024-06-28 01:50:48,999 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 5 states and 157 transitions. [2024-06-28 01:50:49,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 114 transitions, 584 flow [2024-06-28 01:50:49,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 114 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 01:50:49,005 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 310 flow [2024-06-28 01:50:49,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-28 01:50:49,006 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-06-28 01:50:49,006 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 310 flow [2024-06-28 01:50:49,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:49,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:49,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:49,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:50:49,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:50:49,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1109670230, now seen corresponding path program 1 times [2024-06-28 01:50:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359720647] [2024-06-28 01:50:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359720647] [2024-06-28 01:50:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359720647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:51,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:50:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383525801] [2024-06-28 01:50:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:50:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:51,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:50:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:50:51,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:50:51,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 01:50:51,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:51,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:50:51,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:52,619 INFO L124 PetriNetUnfolderBase]: 4195/6120 cut-off events. [2024-06-28 01:50:52,619 INFO L125 PetriNetUnfolderBase]: For 7073/7073 co-relation queries the response was YES. [2024-06-28 01:50:52,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17655 conditions, 6120 events. 4195/6120 cut-off events. For 7073/7073 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33677 event pairs, 791 based on Foata normal form. 14/6132 useless extension candidates. Maximal degree in co-relation 17635. Up to 5470 conditions per place. [2024-06-28 01:50:52,648 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 101 selfloop transitions, 21 changer transitions 0/129 dead transitions. [2024-06-28 01:50:52,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 742 flow [2024-06-28 01:50:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:50:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:50:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 01:50:52,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-28 01:50:52,652 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 310 flow. Second operand 6 states and 183 transitions. [2024-06-28 01:50:52,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 742 flow [2024-06-28 01:50:52,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 736 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 01:50:52,662 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 372 flow [2024-06-28 01:50:52,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-28 01:50:52,664 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-28 01:50:52,664 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 372 flow [2024-06-28 01:50:52,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 01:50:52,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:52,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:50:52,666 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 01:50:52,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 434083392, now seen corresponding path program 1 times [2024-06-28 01:50:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906073959] [2024-06-28 01:50:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:53,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:53,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906073959] [2024-06-28 01:50:53,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906073959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:53,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:53,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:50:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093495144] [2024-06-28 01:50:53,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:50:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:50:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:50:53,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:50:53,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:53,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:53,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:50:53,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:55,341 INFO L124 PetriNetUnfolderBase]: 4187/6444 cut-off events. [2024-06-28 01:50:55,341 INFO L125 PetriNetUnfolderBase]: For 9054/9054 co-relation queries the response was YES. [2024-06-28 01:50:55,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18961 conditions, 6444 events. 4187/6444 cut-off events. For 9054/9054 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37521 event pairs, 1471 based on Foata normal form. 3/6446 useless extension candidates. Maximal degree in co-relation 18937. Up to 5968 conditions per place. [2024-06-28 01:50:55,373 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 76 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-06-28 01:50:55,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 632 flow [2024-06-28 01:50:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:50:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:50:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 01:50:55,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-28 01:50:55,375 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 372 flow. Second operand 5 states and 118 transitions. [2024-06-28 01:50:55,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 632 flow [2024-06-28 01:50:55,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 578 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:50:55,383 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-28 01:50:55,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-28 01:50:55,384 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-28 01:50:55,384 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-28 01:50:55,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:55,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:55,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:55,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:50:55,385 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 01:50:55,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 570819839, now seen corresponding path program 1 times [2024-06-28 01:50:55,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:55,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093186749] [2024-06-28 01:50:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:50:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:50:56,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:50:56,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093186749] [2024-06-28 01:50:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093186749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:50:56,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:50:56,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:50:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667510498] [2024-06-28 01:50:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:50:56,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:50:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:50:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:50:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:50:56,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:50:56,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:56,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:50:56,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:50:56,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:50:58,726 INFO L124 PetriNetUnfolderBase]: 4177/6410 cut-off events. [2024-06-28 01:50:58,727 INFO L125 PetriNetUnfolderBase]: For 9727/9727 co-relation queries the response was YES. [2024-06-28 01:50:58,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18799 conditions, 6410 events. 4177/6410 cut-off events. For 9727/9727 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 36464 event pairs, 1618 based on Foata normal form. 4/6413 useless extension candidates. Maximal degree in co-relation 18773. Up to 5944 conditions per place. [2024-06-28 01:50:58,811 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-28 01:50:58,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 751 flow [2024-06-28 01:50:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:50:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:50:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 01:50:58,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-06-28 01:50:58,815 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 6 states and 140 transitions. [2024-06-28 01:50:58,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 751 flow [2024-06-28 01:50:58,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 712 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 01:50:58,825 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 495 flow [2024-06-28 01:50:58,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=495, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-28 01:50:58,829 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2024-06-28 01:50:58,829 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 495 flow [2024-06-28 01:50:58,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:50:58,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:50:58,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:50:58,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:50:58,829 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 01:50:58,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:50:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash -293637795, now seen corresponding path program 1 times [2024-06-28 01:50:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:50:58,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225551902] [2024-06-28 01:50:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:50:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:50:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:00,906 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 01:51:00,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225551902] [2024-06-28 01:51:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225551902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:00,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:51:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832412559] [2024-06-28 01:51:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:51:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:51:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:51:00,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:00,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 495 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:00,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:00,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:00,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:02,499 INFO L124 PetriNetUnfolderBase]: 4223/6198 cut-off events. [2024-06-28 01:51:02,500 INFO L125 PetriNetUnfolderBase]: For 12331/12334 co-relation queries the response was YES. [2024-06-28 01:51:02,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 6198 events. 4223/6198 cut-off events. For 12331/12334 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34054 event pairs, 1184 based on Foata normal form. 8/6204 useless extension candidates. Maximal degree in co-relation 20053. Up to 5681 conditions per place. [2024-06-28 01:51:02,561 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 95 selfloop transitions, 27 changer transitions 0/128 dead transitions. [2024-06-28 01:51:02,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 903 flow [2024-06-28 01:51:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:51:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:51:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 01:51:02,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-28 01:51:02,563 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 495 flow. Second operand 6 states and 155 transitions. [2024-06-28 01:51:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 903 flow [2024-06-28 01:51:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 893 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 01:51:02,576 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 573 flow [2024-06-28 01:51:02,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-28 01:51:02,577 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-28 01:51:02,577 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 573 flow [2024-06-28 01:51:02,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:02,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:02,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:02,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:51:02,578 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 01:51:02,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 542351295, now seen corresponding path program 2 times [2024-06-28 01:51:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:02,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780782617] [2024-06-28 01:51:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:04,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780782617] [2024-06-28 01:51:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780782617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:04,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:04,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:51:04,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945477333] [2024-06-28 01:51:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:04,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:51:04,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:51:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:51:04,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:04,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 573 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:04,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:04,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:04,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:06,141 INFO L124 PetriNetUnfolderBase]: 4203/6147 cut-off events. [2024-06-28 01:51:06,141 INFO L125 PetriNetUnfolderBase]: For 14321/14321 co-relation queries the response was YES. [2024-06-28 01:51:06,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20519 conditions, 6147 events. 4203/6147 cut-off events. For 14321/14321 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33491 event pairs, 1218 based on Foata normal form. 3/6145 useless extension candidates. Maximal degree in co-relation 20487. Up to 5657 conditions per place. [2024-06-28 01:51:06,199 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 89 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2024-06-28 01:51:06,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 123 transitions, 919 flow [2024-06-28 01:51:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:51:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:51:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 01:51:06,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 01:51:06,201 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 573 flow. Second operand 6 states and 150 transitions. [2024-06-28 01:51:06,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 123 transitions, 919 flow [2024-06-28 01:51:06,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 123 transitions, 882 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:51:06,217 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 602 flow [2024-06-28 01:51:06,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=602, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-28 01:51:06,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-28 01:51:06,217 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 602 flow [2024-06-28 01:51:06,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:06,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:06,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:06,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:51:06,218 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 01:51:06,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1079269698, now seen corresponding path program 1 times [2024-06-28 01:51:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:06,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953828661] [2024-06-28 01:51:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:06,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953828661] [2024-06-28 01:51:07,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953828661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:07,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155323407] [2024-06-28 01:51:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:07,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:07,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 602 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:07,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:07,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:07,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:10,665 INFO L124 PetriNetUnfolderBase]: 6671/9716 cut-off events. [2024-06-28 01:51:10,665 INFO L125 PetriNetUnfolderBase]: For 25260/25263 co-relation queries the response was YES. [2024-06-28 01:51:10,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32712 conditions, 9716 events. 6671/9716 cut-off events. For 25260/25263 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 54681 event pairs, 1368 based on Foata normal form. 22/9736 useless extension candidates. Maximal degree in co-relation 32679. Up to 6662 conditions per place. [2024-06-28 01:51:10,713 INFO L140 encePairwiseOnDemand]: 30/47 looper letters, 164 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-28 01:51:10,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 238 transitions, 1770 flow [2024-06-28 01:51:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:51:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:51:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-28 01:51:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841392649903289 [2024-06-28 01:51:10,716 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 602 flow. Second operand 11 states and 302 transitions. [2024-06-28 01:51:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 238 transitions, 1770 flow [2024-06-28 01:51:10,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 238 transitions, 1659 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 01:51:10,741 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1062 flow [2024-06-28 01:51:10,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1062, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-06-28 01:51:10,741 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2024-06-28 01:51:10,741 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1062 flow [2024-06-28 01:51:10,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:10,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:10,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:10,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:51:10,742 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 01:51:10,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:10,743 INFO L85 PathProgramCache]: Analyzing trace with hash -567346064, now seen corresponding path program 2 times [2024-06-28 01:51:10,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:10,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106148414] [2024-06-28 01:51:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:10,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:12,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:12,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106148414] [2024-06-28 01:51:12,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106148414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:12,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:12,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:12,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983844444] [2024-06-28 01:51:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:12,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:12,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:13,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:13,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1062 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:13,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:13,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:13,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:15,544 INFO L124 PetriNetUnfolderBase]: 8111/11724 cut-off events. [2024-06-28 01:51:15,545 INFO L125 PetriNetUnfolderBase]: For 50038/50043 co-relation queries the response was YES. [2024-06-28 01:51:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49203 conditions, 11724 events. 8111/11724 cut-off events. For 50038/50043 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 66532 event pairs, 1438 based on Foata normal form. 38/11760 useless extension candidates. Maximal degree in co-relation 49163. Up to 7438 conditions per place. [2024-06-28 01:51:15,607 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 140 selfloop transitions, 89 changer transitions 0/235 dead transitions. [2024-06-28 01:51:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 235 transitions, 2086 flow [2024-06-28 01:51:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:51:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:51:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-28 01:51:15,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-28 01:51:15,610 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1062 flow. Second operand 9 states and 240 transitions. [2024-06-28 01:51:15,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 235 transitions, 2086 flow [2024-06-28 01:51:15,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 235 transitions, 2032 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 01:51:15,728 INFO L231 Difference]: Finished difference. Result has 102 places, 150 transitions, 1459 flow [2024-06-28 01:51:15,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1459, PETRI_PLACES=102, PETRI_TRANSITIONS=150} [2024-06-28 01:51:15,729 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-06-28 01:51:15,729 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 150 transitions, 1459 flow [2024-06-28 01:51:15,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:15,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:15,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:15,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:51:15,730 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 01:51:15,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -346421774, now seen corresponding path program 3 times [2024-06-28 01:51:15,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:15,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370010051] [2024-06-28 01:51:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:15,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:17,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370010051] [2024-06-28 01:51:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370010051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:17,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:17,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838062933] [2024-06-28 01:51:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:17,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:17,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:17,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 150 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:17,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:20,220 INFO L124 PetriNetUnfolderBase]: 8283/11885 cut-off events. [2024-06-28 01:51:20,220 INFO L125 PetriNetUnfolderBase]: For 68829/68831 co-relation queries the response was YES. [2024-06-28 01:51:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57159 conditions, 11885 events. 8283/11885 cut-off events. For 68829/68831 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 66661 event pairs, 1716 based on Foata normal form. 18/11895 useless extension candidates. Maximal degree in co-relation 57115. Up to 10357 conditions per place. [2024-06-28 01:51:20,283 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 167 selfloop transitions, 61 changer transitions 0/234 dead transitions. [2024-06-28 01:51:20,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 234 transitions, 2397 flow [2024-06-28 01:51:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:51:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:51:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 01:51:20,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-28 01:51:20,304 INFO L175 Difference]: Start difference. First operand has 102 places, 150 transitions, 1459 flow. Second operand 8 states and 202 transitions. [2024-06-28 01:51:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 234 transitions, 2397 flow [2024-06-28 01:51:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 234 transitions, 2236 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 01:51:20,480 INFO L231 Difference]: Finished difference. Result has 106 places, 168 transitions, 1666 flow [2024-06-28 01:51:20,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1666, PETRI_PLACES=106, PETRI_TRANSITIONS=168} [2024-06-28 01:51:20,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-06-28 01:51:20,481 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 168 transitions, 1666 flow [2024-06-28 01:51:20,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:20,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:20,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:20,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:51:20,481 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 01:51:20,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -335466908, now seen corresponding path program 4 times [2024-06-28 01:51:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547973026] [2024-06-28 01:51:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547973026] [2024-06-28 01:51:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547973026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:22,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:22,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195244903] [2024-06-28 01:51:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:22,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 168 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:22,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:22,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:22,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:25,265 INFO L124 PetriNetUnfolderBase]: 8293/11812 cut-off events. [2024-06-28 01:51:25,266 INFO L125 PetriNetUnfolderBase]: For 73252/73254 co-relation queries the response was YES. [2024-06-28 01:51:25,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56660 conditions, 11812 events. 8293/11812 cut-off events. For 73252/73254 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 64598 event pairs, 1590 based on Foata normal form. 4/11804 useless extension candidates. Maximal degree in co-relation 56614. Up to 10497 conditions per place. [2024-06-28 01:51:25,362 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 216 selfloop transitions, 62 changer transitions 0/284 dead transitions. [2024-06-28 01:51:25,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 284 transitions, 3150 flow [2024-06-28 01:51:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:51:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:51:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 01:51:25,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 01:51:25,365 INFO L175 Difference]: Start difference. First operand has 106 places, 168 transitions, 1666 flow. Second operand 7 states and 179 transitions. [2024-06-28 01:51:25,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 284 transitions, 3150 flow [2024-06-28 01:51:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 284 transitions, 2933 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 01:51:25,623 INFO L231 Difference]: Finished difference. Result has 111 places, 214 transitions, 2269 flow [2024-06-28 01:51:25,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2269, PETRI_PLACES=111, PETRI_TRANSITIONS=214} [2024-06-28 01:51:25,624 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-28 01:51:25,624 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 214 transitions, 2269 flow [2024-06-28 01:51:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 01:51:25,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:25,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:25,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:51:25,625 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 01:51:25,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash -335457980, now seen corresponding path program 1 times [2024-06-28 01:51:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:25,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006534046] [2024-06-28 01:51:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006534046] [2024-06-28 01:51:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006534046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:28,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:51:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220745378] [2024-06-28 01:51:28,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:51:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:51:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:51:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:28,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 214 transitions, 2269 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:28,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:28,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:28,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:30,695 INFO L124 PetriNetUnfolderBase]: 8285/12269 cut-off events. [2024-06-28 01:51:30,695 INFO L125 PetriNetUnfolderBase]: For 78178/78180 co-relation queries the response was YES. [2024-06-28 01:51:30,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59296 conditions, 12269 events. 8285/12269 cut-off events. For 78178/78180 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 71456 event pairs, 2408 based on Foata normal form. 4/12272 useless extension candidates. Maximal degree in co-relation 59246. Up to 11477 conditions per place. [2024-06-28 01:51:30,793 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 236 selfloop transitions, 17 changer transitions 0/259 dead transitions. [2024-06-28 01:51:30,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 259 transitions, 2941 flow [2024-06-28 01:51:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:51:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:51:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 01:51:30,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-28 01:51:30,795 INFO L175 Difference]: Start difference. First operand has 111 places, 214 transitions, 2269 flow. Second operand 7 states and 163 transitions. [2024-06-28 01:51:30,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 259 transitions, 2941 flow [2024-06-28 01:51:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 259 transitions, 2911 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-28 01:51:30,996 INFO L231 Difference]: Finished difference. Result has 117 places, 217 transitions, 2325 flow [2024-06-28 01:51:30,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2325, PETRI_PLACES=117, PETRI_TRANSITIONS=217} [2024-06-28 01:51:30,997 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-28 01:51:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 217 transitions, 2325 flow [2024-06-28 01:51:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:30,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:51:30,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:51:30,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1770199509, now seen corresponding path program 1 times [2024-06-28 01:51:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841309272] [2024-06-28 01:51:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:33,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:33,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841309272] [2024-06-28 01:51:33,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841309272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:33,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:33,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362337975] [2024-06-28 01:51:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:33,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:33,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 217 transitions, 2325 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:33,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:33,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:33,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:35,812 INFO L124 PetriNetUnfolderBase]: 8909/12848 cut-off events. [2024-06-28 01:51:35,813 INFO L125 PetriNetUnfolderBase]: For 89986/89999 co-relation queries the response was YES. [2024-06-28 01:51:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64346 conditions, 12848 events. 8909/12848 cut-off events. For 89986/89999 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 73321 event pairs, 1502 based on Foata normal form. 30/12876 useless extension candidates. Maximal degree in co-relation 64293. Up to 7975 conditions per place. [2024-06-28 01:51:35,898 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 159 selfloop transitions, 147 changer transitions 0/312 dead transitions. [2024-06-28 01:51:35,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 312 transitions, 3592 flow [2024-06-28 01:51:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:51:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:51:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-28 01:51:35,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-28 01:51:35,900 INFO L175 Difference]: Start difference. First operand has 117 places, 217 transitions, 2325 flow. Second operand 8 states and 212 transitions. [2024-06-28 01:51:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 312 transitions, 3592 flow [2024-06-28 01:51:36,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 312 transitions, 3536 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 01:51:36,095 INFO L231 Difference]: Finished difference. Result has 121 places, 242 transitions, 2948 flow [2024-06-28 01:51:36,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2948, PETRI_PLACES=121, PETRI_TRANSITIONS=242} [2024-06-28 01:51:36,097 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-28 01:51:36,097 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 242 transitions, 2948 flow [2024-06-28 01:51:36,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:36,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:36,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:36,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:51:36,098 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:51:36,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1281961975, now seen corresponding path program 2 times [2024-06-28 01:51:36,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388710884] [2024-06-28 01:51:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:36,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:38,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:38,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388710884] [2024-06-28 01:51:38,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388710884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:38,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:38,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:38,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679596918] [2024-06-28 01:51:38,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:38,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:38,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:38,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 242 transitions, 2948 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:38,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:38,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:38,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:41,550 INFO L124 PetriNetUnfolderBase]: 8869/12820 cut-off events. [2024-06-28 01:51:41,550 INFO L125 PetriNetUnfolderBase]: For 107984/108001 co-relation queries the response was YES. [2024-06-28 01:51:41,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69260 conditions, 12820 events. 8869/12820 cut-off events. For 107984/108001 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 73555 event pairs, 1753 based on Foata normal form. 36/12854 useless extension candidates. Maximal degree in co-relation 69205. Up to 7953 conditions per place. [2024-06-28 01:51:41,638 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 173 selfloop transitions, 161 changer transitions 0/340 dead transitions. [2024-06-28 01:51:41,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 340 transitions, 4136 flow [2024-06-28 01:51:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:51:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:51:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-28 01:51:41,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862884160756501 [2024-06-28 01:51:41,640 INFO L175 Difference]: Start difference. First operand has 121 places, 242 transitions, 2948 flow. Second operand 9 states and 248 transitions. [2024-06-28 01:51:41,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 340 transitions, 4136 flow [2024-06-28 01:51:42,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 340 transitions, 3968 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-28 01:51:42,054 INFO L231 Difference]: Finished difference. Result has 129 places, 249 transitions, 3360 flow [2024-06-28 01:51:42,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3360, PETRI_PLACES=129, PETRI_TRANSITIONS=249} [2024-06-28 01:51:42,055 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-28 01:51:42,055 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 249 transitions, 3360 flow [2024-06-28 01:51:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:42,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:42,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:42,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:51:42,055 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 01:51:42,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1515950343, now seen corresponding path program 3 times [2024-06-28 01:51:42,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:42,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016541109] [2024-06-28 01:51:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:44,511 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 01:51:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:44,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016541109] [2024-06-28 01:51:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016541109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:44,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:44,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64130240] [2024-06-28 01:51:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:44,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:44,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 249 transitions, 3360 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:44,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:44,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:44,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:47,395 INFO L124 PetriNetUnfolderBase]: 8869/12757 cut-off events. [2024-06-28 01:51:47,395 INFO L125 PetriNetUnfolderBase]: For 121141/121173 co-relation queries the response was YES. [2024-06-28 01:51:47,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74977 conditions, 12757 events. 8869/12757 cut-off events. For 121141/121173 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 71637 event pairs, 1738 based on Foata normal form. 19/12763 useless extension candidates. Maximal degree in co-relation 74918. Up to 11227 conditions per place. [2024-06-28 01:51:47,482 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 61 changer transitions 0/319 dead transitions. [2024-06-28 01:51:47,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 319 transitions, 4425 flow [2024-06-28 01:51:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:51:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:51:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 01:51:47,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-28 01:51:47,484 INFO L175 Difference]: Start difference. First operand has 129 places, 249 transitions, 3360 flow. Second operand 7 states and 174 transitions. [2024-06-28 01:51:47,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 319 transitions, 4425 flow [2024-06-28 01:51:47,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 319 transitions, 4077 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 01:51:47,868 INFO L231 Difference]: Finished difference. Result has 130 places, 255 transitions, 3269 flow [2024-06-28 01:51:47,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3269, PETRI_PLACES=130, PETRI_TRANSITIONS=255} [2024-06-28 01:51:47,869 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-06-28 01:51:47,869 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 255 transitions, 3269 flow [2024-06-28 01:51:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:47,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:47,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:47,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:51:47,869 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 01:51:47,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 60008575, now seen corresponding path program 1 times [2024-06-28 01:51:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:47,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617853540] [2024-06-28 01:51:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:50,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617853540] [2024-06-28 01:51:50,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617853540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:50,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:50,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028461768] [2024-06-28 01:51:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:50,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:50,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:50,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 255 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:50,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:50,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:50,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:52,720 INFO L124 PetriNetUnfolderBase]: 8957/12920 cut-off events. [2024-06-28 01:51:52,721 INFO L125 PetriNetUnfolderBase]: For 119864/119877 co-relation queries the response was YES. [2024-06-28 01:51:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73463 conditions, 12920 events. 8957/12920 cut-off events. For 119864/119877 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 74108 event pairs, 1463 based on Foata normal form. 16/12934 useless extension candidates. Maximal degree in co-relation 73403. Up to 11302 conditions per place. [2024-06-28 01:51:52,846 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 255 selfloop transitions, 56 changer transitions 0/317 dead transitions. [2024-06-28 01:51:52,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 317 transitions, 4273 flow [2024-06-28 01:51:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:51:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:51:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 01:51:52,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-28 01:51:52,849 INFO L175 Difference]: Start difference. First operand has 130 places, 255 transitions, 3269 flow. Second operand 7 states and 180 transitions. [2024-06-28 01:51:52,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 317 transitions, 4273 flow [2024-06-28 01:51:53,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 317 transitions, 4206 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 01:51:53,493 INFO L231 Difference]: Finished difference. Result has 134 places, 259 transitions, 3387 flow [2024-06-28 01:51:53,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3387, PETRI_PLACES=134, PETRI_TRANSITIONS=259} [2024-06-28 01:51:53,493 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-06-28 01:51:53,494 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 259 transitions, 3387 flow [2024-06-28 01:51:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:53,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:53,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:51:53,494 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 01:51:53,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1917921439, now seen corresponding path program 2 times [2024-06-28 01:51:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136071792] [2024-06-28 01:51:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:51:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:51:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:51:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136071792] [2024-06-28 01:51:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136071792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:51:55,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:51:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:51:55,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756280181] [2024-06-28 01:51:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:51:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:51:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:51:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:51:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:51:55,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:51:55,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 259 transitions, 3387 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:55,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:51:55,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:51:55,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:51:58,889 INFO L124 PetriNetUnfolderBase]: 8944/12937 cut-off events. [2024-06-28 01:51:58,889 INFO L125 PetriNetUnfolderBase]: For 127768/127773 co-relation queries the response was YES. [2024-06-28 01:51:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73765 conditions, 12937 events. 8944/12937 cut-off events. For 127768/127773 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 74087 event pairs, 1970 based on Foata normal form. 8/12943 useless extension candidates. Maximal degree in co-relation 73703. Up to 11648 conditions per place. [2024-06-28 01:51:58,999 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 247 selfloop transitions, 63 changer transitions 0/316 dead transitions. [2024-06-28 01:51:58,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 316 transitions, 4272 flow [2024-06-28 01:51:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:51:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:51:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 01:51:59,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-28 01:51:59,002 INFO L175 Difference]: Start difference. First operand has 134 places, 259 transitions, 3387 flow. Second operand 7 states and 178 transitions. [2024-06-28 01:51:59,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 316 transitions, 4272 flow [2024-06-28 01:51:59,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 316 transitions, 4180 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 01:51:59,491 INFO L231 Difference]: Finished difference. Result has 138 places, 259 transitions, 3433 flow [2024-06-28 01:51:59,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3295, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3433, PETRI_PLACES=138, PETRI_TRANSITIONS=259} [2024-06-28 01:51:59,492 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 87 predicate places. [2024-06-28 01:51:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 259 transitions, 3433 flow [2024-06-28 01:51:59,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:51:59,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:51:59,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:51:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:51:59,493 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 01:51:59,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:51:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1086296805, now seen corresponding path program 1 times [2024-06-28 01:51:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:51:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345904365] [2024-06-28 01:51:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:51:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:51:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:02,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345904365] [2024-06-28 01:52:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345904365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:02,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:52:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521259503] [2024-06-28 01:52:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:52:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:52:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:52:02,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:02,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 259 transitions, 3433 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:02,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:02,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:02,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:05,789 INFO L124 PetriNetUnfolderBase]: 10400/15057 cut-off events. [2024-06-28 01:52:05,791 INFO L125 PetriNetUnfolderBase]: For 159605/159610 co-relation queries the response was YES. [2024-06-28 01:52:05,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82971 conditions, 15057 events. 10400/15057 cut-off events. For 159605/159610 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 88263 event pairs, 1779 based on Foata normal form. 94/15149 useless extension candidates. Maximal degree in co-relation 82907. Up to 7926 conditions per place. [2024-06-28 01:52:05,942 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 188 selfloop transitions, 168 changer transitions 0/362 dead transitions. [2024-06-28 01:52:05,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 362 transitions, 4658 flow [2024-06-28 01:52:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:52:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:52:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-28 01:52:05,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765957446808511 [2024-06-28 01:52:05,944 INFO L175 Difference]: Start difference. First operand has 138 places, 259 transitions, 3433 flow. Second operand 10 states and 271 transitions. [2024-06-28 01:52:05,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 362 transitions, 4658 flow [2024-06-28 01:52:06,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 362 transitions, 4521 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 01:52:06,480 INFO L231 Difference]: Finished difference. Result has 142 places, 263 transitions, 3731 flow [2024-06-28 01:52:06,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3731, PETRI_PLACES=142, PETRI_TRANSITIONS=263} [2024-06-28 01:52:06,481 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 91 predicate places. [2024-06-28 01:52:06,481 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 263 transitions, 3731 flow [2024-06-28 01:52:06,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:06,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:06,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:52:06,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:52:06,482 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 01:52:06,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1762221357, now seen corresponding path program 2 times [2024-06-28 01:52:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382378880] [2024-06-28 01:52:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:06,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382378880] [2024-06-28 01:52:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382378880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:52:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351151007] [2024-06-28 01:52:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:52:09,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:52:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:52:09,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:09,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 263 transitions, 3731 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:09,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:12,631 INFO L124 PetriNetUnfolderBase]: 10716/15586 cut-off events. [2024-06-28 01:52:12,631 INFO L125 PetriNetUnfolderBase]: For 177664/177666 co-relation queries the response was YES. [2024-06-28 01:52:12,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90523 conditions, 15586 events. 10716/15586 cut-off events. For 177664/177666 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 92322 event pairs, 2337 based on Foata normal form. 18/15596 useless extension candidates. Maximal degree in co-relation 90458. Up to 13550 conditions per place. [2024-06-28 01:52:12,766 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 252 selfloop transitions, 89 changer transitions 0/347 dead transitions. [2024-06-28 01:52:12,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 347 transitions, 4840 flow [2024-06-28 01:52:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:52:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:52:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-28 01:52:12,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-28 01:52:12,768 INFO L175 Difference]: Start difference. First operand has 142 places, 263 transitions, 3731 flow. Second operand 9 states and 232 transitions. [2024-06-28 01:52:12,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 347 transitions, 4840 flow [2024-06-28 01:52:13,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 347 transitions, 4475 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-28 01:52:13,452 INFO L231 Difference]: Finished difference. Result has 143 places, 267 transitions, 3642 flow [2024-06-28 01:52:13,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3642, PETRI_PLACES=143, PETRI_TRANSITIONS=267} [2024-06-28 01:52:13,453 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-28 01:52:13,453 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 267 transitions, 3642 flow [2024-06-28 01:52:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:13,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:52:13,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:52:13,454 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:52:13,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash -252828955, now seen corresponding path program 3 times [2024-06-28 01:52:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836685648] [2024-06-28 01:52:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:13,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:16,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836685648] [2024-06-28 01:52:16,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836685648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:16,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:16,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:52:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525778884] [2024-06-28 01:52:16,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:16,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:52:16,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:16,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:52:16,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:52:16,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:16,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 267 transitions, 3642 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:16,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:16,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:20,024 INFO L124 PetriNetUnfolderBase]: 10766/15624 cut-off events. [2024-06-28 01:52:20,025 INFO L125 PetriNetUnfolderBase]: For 165195/165197 co-relation queries the response was YES. [2024-06-28 01:52:20,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87658 conditions, 15624 events. 10766/15624 cut-off events. For 165195/165197 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 91825 event pairs, 2211 based on Foata normal form. 4/15614 useless extension candidates. Maximal degree in co-relation 87592. Up to 14028 conditions per place. [2024-06-28 01:52:20,152 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 269 selfloop transitions, 74 changer transitions 0/349 dead transitions. [2024-06-28 01:52:20,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 349 transitions, 4797 flow [2024-06-28 01:52:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:52:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:52:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 01:52:20,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-28 01:52:20,154 INFO L175 Difference]: Start difference. First operand has 143 places, 267 transitions, 3642 flow. Second operand 8 states and 201 transitions. [2024-06-28 01:52:20,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 349 transitions, 4797 flow [2024-06-28 01:52:20,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 349 transitions, 4565 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 01:52:20,721 INFO L231 Difference]: Finished difference. Result has 144 places, 269 transitions, 3613 flow [2024-06-28 01:52:20,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=144, PETRI_TRANSITIONS=269} [2024-06-28 01:52:20,722 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-28 01:52:20,722 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 269 transitions, 3613 flow [2024-06-28 01:52:20,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:20,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:20,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:52:20,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:52:20,723 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 01:52:20,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:20,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1752158361, now seen corresponding path program 4 times [2024-06-28 01:52:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:20,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133756053] [2024-06-28 01:52:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:23,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133756053] [2024-06-28 01:52:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133756053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:52:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466723212] [2024-06-28 01:52:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:52:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:52:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:52:23,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:23,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 269 transitions, 3613 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:23,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:23,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:23,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:26,789 INFO L124 PetriNetUnfolderBase]: 10802/15664 cut-off events. [2024-06-28 01:52:26,789 INFO L125 PetriNetUnfolderBase]: For 165586/165588 co-relation queries the response was YES. [2024-06-28 01:52:26,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86973 conditions, 15664 events. 10802/15664 cut-off events. For 165586/165588 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 92078 event pairs, 2078 based on Foata normal form. 4/15654 useless extension candidates. Maximal degree in co-relation 86906. Up to 13440 conditions per place. [2024-06-28 01:52:27,143 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 274 selfloop transitions, 83 changer transitions 0/363 dead transitions. [2024-06-28 01:52:27,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 363 transitions, 4918 flow [2024-06-28 01:52:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:52:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:52:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 01:52:27,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-28 01:52:27,145 INFO L175 Difference]: Start difference. First operand has 144 places, 269 transitions, 3613 flow. Second operand 8 states and 205 transitions. [2024-06-28 01:52:27,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 363 transitions, 4918 flow [2024-06-28 01:52:27,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 363 transitions, 4759 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 01:52:27,644 INFO L231 Difference]: Finished difference. Result has 147 places, 276 transitions, 3769 flow [2024-06-28 01:52:27,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3769, PETRI_PLACES=147, PETRI_TRANSITIONS=276} [2024-06-28 01:52:27,644 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-28 01:52:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 276 transitions, 3769 flow [2024-06-28 01:52:27,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:27,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:27,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:52:27,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:52:27,645 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:52:27,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -478971194, now seen corresponding path program 1 times [2024-06-28 01:52:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:27,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224366641] [2024-06-28 01:52:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:29,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224366641] [2024-06-28 01:52:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224366641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:52:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528912603] [2024-06-28 01:52:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:52:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:52:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:52:29,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:29,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 276 transitions, 3769 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:29,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:29,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:32,648 INFO L124 PetriNetUnfolderBase]: 10796/16108 cut-off events. [2024-06-28 01:52:32,648 INFO L125 PetriNetUnfolderBase]: For 178482/178484 co-relation queries the response was YES. [2024-06-28 01:52:32,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88880 conditions, 16108 events. 10796/16108 cut-off events. For 178482/178484 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99544 event pairs, 3337 based on Foata normal form. 2/16109 useless extension candidates. Maximal degree in co-relation 88811. Up to 15230 conditions per place. [2024-06-28 01:52:32,808 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 280 selfloop transitions, 13 changer transitions 0/299 dead transitions. [2024-06-28 01:52:32,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 299 transitions, 4465 flow [2024-06-28 01:52:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:52:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:52:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-28 01:52:32,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2024-06-28 01:52:32,810 INFO L175 Difference]: Start difference. First operand has 147 places, 276 transitions, 3769 flow. Second operand 5 states and 113 transitions. [2024-06-28 01:52:32,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 299 transitions, 4465 flow [2024-06-28 01:52:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 299 transitions, 4341 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 01:52:33,467 INFO L231 Difference]: Finished difference. Result has 148 places, 280 transitions, 3740 flow [2024-06-28 01:52:33,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3740, PETRI_PLACES=148, PETRI_TRANSITIONS=280} [2024-06-28 01:52:33,468 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-06-28 01:52:33,468 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 280 transitions, 3740 flow [2024-06-28 01:52:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:52:33,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:33,469 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 01:52:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:52:33,469 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 01:52:33,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 981586220, now seen corresponding path program 1 times [2024-06-28 01:52:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:33,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333603979] [2024-06-28 01:52:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:33,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:35,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333603979] [2024-06-28 01:52:35,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333603979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:35,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:35,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:52:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363403220] [2024-06-28 01:52:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:35,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:52:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:52:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:52:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:36,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 280 transitions, 3740 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:36,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:36,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:36,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:40,377 INFO L124 PetriNetUnfolderBase]: 14843/21808 cut-off events. [2024-06-28 01:52:40,378 INFO L125 PetriNetUnfolderBase]: For 295436/295449 co-relation queries the response was YES. [2024-06-28 01:52:40,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118892 conditions, 21808 events. 14843/21808 cut-off events. For 295436/295449 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 139568 event pairs, 2296 based on Foata normal form. 82/21888 useless extension candidates. Maximal degree in co-relation 118821. Up to 7587 conditions per place. [2024-06-28 01:52:40,601 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 240 selfloop transitions, 155 changer transitions 0/401 dead transitions. [2024-06-28 01:52:40,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 401 transitions, 5430 flow [2024-06-28 01:52:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:52:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:52:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-06-28 01:52:40,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-28 01:52:40,603 INFO L175 Difference]: Start difference. First operand has 148 places, 280 transitions, 3740 flow. Second operand 9 states and 261 transitions. [2024-06-28 01:52:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 401 transitions, 5430 flow [2024-06-28 01:52:41,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 401 transitions, 5365 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 01:52:41,537 INFO L231 Difference]: Finished difference. Result has 156 places, 294 transitions, 4382 flow [2024-06-28 01:52:41,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4382, PETRI_PLACES=156, PETRI_TRANSITIONS=294} [2024-06-28 01:52:41,538 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 105 predicate places. [2024-06-28 01:52:41,538 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 294 transitions, 4382 flow [2024-06-28 01:52:41,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:41,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:41,539 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 01:52:41,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:52:41,539 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:52:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -56012360, now seen corresponding path program 2 times [2024-06-28 01:52:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518073923] [2024-06-28 01:52:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518073923] [2024-06-28 01:52:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518073923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:44,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:52:44,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956090469] [2024-06-28 01:52:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:52:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:52:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:52:44,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:44,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 294 transitions, 4382 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:44,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:44,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:44,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:52:50,164 INFO L124 PetriNetUnfolderBase]: 17223/25348 cut-off events. [2024-06-28 01:52:50,164 INFO L125 PetriNetUnfolderBase]: For 413625/413630 co-relation queries the response was YES. [2024-06-28 01:52:50,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143489 conditions, 25348 events. 17223/25348 cut-off events. For 413625/413630 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 166525 event pairs, 3978 based on Foata normal form. 74/25420 useless extension candidates. Maximal degree in co-relation 143415. Up to 14277 conditions per place. [2024-06-28 01:52:50,409 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 233 selfloop transitions, 173 changer transitions 0/412 dead transitions. [2024-06-28 01:52:50,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 412 transitions, 5962 flow [2024-06-28 01:52:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:52:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:52:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-06-28 01:52:50,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 01:52:50,411 INFO L175 Difference]: Start difference. First operand has 156 places, 294 transitions, 4382 flow. Second operand 10 states and 282 transitions. [2024-06-28 01:52:50,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 412 transitions, 5962 flow [2024-06-28 01:52:52,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 412 transitions, 5691 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-28 01:52:52,230 INFO L231 Difference]: Finished difference. Result has 164 places, 303 transitions, 4742 flow [2024-06-28 01:52:52,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4742, PETRI_PLACES=164, PETRI_TRANSITIONS=303} [2024-06-28 01:52:52,231 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-28 01:52:52,231 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 303 transitions, 4742 flow [2024-06-28 01:52:52,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:52,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:52:52,232 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 01:52:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:52:52,232 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:52:52,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:52:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -690261576, now seen corresponding path program 3 times [2024-06-28 01:52:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:52:52,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411875279] [2024-06-28 01:52:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:52:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:52:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:52:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:52:54,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:52:54,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411875279] [2024-06-28 01:52:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411875279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:52:54,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:52:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:52:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379742905] [2024-06-28 01:52:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:52:54,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:52:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:52:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:52:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:52:54,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:52:54,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 303 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:52:54,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:52:54,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:52:54,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:53:01,418 INFO L124 PetriNetUnfolderBase]: 19284/28642 cut-off events. [2024-06-28 01:53:01,418 INFO L125 PetriNetUnfolderBase]: For 480229/480246 co-relation queries the response was YES. [2024-06-28 01:53:01,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161491 conditions, 28642 events. 19284/28642 cut-off events. For 480229/480246 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 195304 event pairs, 4375 based on Foata normal form. 80/28720 useless extension candidates. Maximal degree in co-relation 161414. Up to 19045 conditions per place. [2024-06-28 01:53:01,788 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 250 selfloop transitions, 170 changer transitions 0/426 dead transitions. [2024-06-28 01:53:01,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 426 transitions, 6390 flow [2024-06-28 01:53:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:53:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:53:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-28 01:53:01,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-06-28 01:53:01,790 INFO L175 Difference]: Start difference. First operand has 164 places, 303 transitions, 4742 flow. Second operand 10 states and 286 transitions. [2024-06-28 01:53:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 426 transitions, 6390 flow [2024-06-28 01:53:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 426 transitions, 5998 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 01:53:03,954 INFO L231 Difference]: Finished difference. Result has 168 places, 311 transitions, 4915 flow [2024-06-28 01:53:03,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4915, PETRI_PLACES=168, PETRI_TRANSITIONS=311} [2024-06-28 01:53:03,955 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-28 01:53:03,955 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 311 transitions, 4915 flow [2024-06-28 01:53:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:53:03,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:53:03,956 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 01:53:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:53:03,956 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:53:03,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:53:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash -684751326, now seen corresponding path program 4 times [2024-06-28 01:53:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:53:03,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98555387] [2024-06-28 01:53:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:53:03,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:53:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:53:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:53:06,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:53:06,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98555387] [2024-06-28 01:53:06,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98555387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:53:06,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:53:06,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:53:06,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253412663] [2024-06-28 01:53:06,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:53:06,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:53:06,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:53:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:53:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:53:06,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:53:06,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 311 transitions, 4915 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:53:06,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:53:06,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:53:06,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:53:13,517 INFO L124 PetriNetUnfolderBase]: 20424/30354 cut-off events. [2024-06-28 01:53:13,517 INFO L125 PetriNetUnfolderBase]: For 500492/500505 co-relation queries the response was YES. [2024-06-28 01:53:13,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168523 conditions, 30354 events. 20424/30354 cut-off events. For 500492/500505 co-relation queries the response was YES. Maximal size of possible extension queue 1226. Compared 209377 event pairs, 5786 based on Foata normal form. 84/30436 useless extension candidates. Maximal degree in co-relation 168444. Up to 23608 conditions per place. [2024-06-28 01:53:13,947 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 235 selfloop transitions, 156 changer transitions 0/397 dead transitions. [2024-06-28 01:53:13,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 397 transitions, 6117 flow [2024-06-28 01:53:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:53:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:53:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-28 01:53:13,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-06-28 01:53:13,949 INFO L175 Difference]: Start difference. First operand has 168 places, 311 transitions, 4915 flow. Second operand 9 states and 241 transitions. [2024-06-28 01:53:13,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 397 transitions, 6117 flow [2024-06-28 01:53:16,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 397 transitions, 5823 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 01:53:16,740 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 5042 flow [2024-06-28 01:53:16,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5042, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-28 01:53:16,741 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-28 01:53:16,741 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 5042 flow [2024-06-28 01:53:16,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:53:16,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:53:16,741 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 01:53:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:53:16,741 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:53:16,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:53:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -690113706, now seen corresponding path program 5 times [2024-06-28 01:53:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:53:16,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075122227] [2024-06-28 01:53:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:53:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:53:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:53:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:53:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:53:19,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075122227] [2024-06-28 01:53:19,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075122227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:53:19,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:53:19,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:53:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691873437] [2024-06-28 01:53:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:53:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:53:19,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:53:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:53:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:53:19,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-28 01:53:19,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 5042 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 01:53:19,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:53:19,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-28 01:53:19,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand