./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:30:02,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:30:02,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:30:02,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:30:02,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:30:02,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:30:02,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:30:02,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:30:02,732 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:30:02,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:30:02,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:30:02,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:30:02,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:30:02,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:30:02,734 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:30:02,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:30:02,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:30:02,735 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:30:02,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:30:02,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:30:02,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:30:02,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:30:02,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:30:02,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:30:02,737 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:30:02,737 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:30:02,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:30:02,738 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:30:02,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:30:02,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:30:02,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:30:02,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:30:02,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:30:02,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:30:02,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:30:02,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:30:02,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:30:02,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:30:02,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:30:02,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:30:02,742 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:30:02,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:30:02,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:30:02,743 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:30:02,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:30:02,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:30:02,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:30:02,913 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:30:02,913 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:30:02,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i [2024-06-21 21:30:04,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:30:04,255 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:30:04,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i [2024-06-21 21:30:04,268 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229631ed6/84dca2644b7a46719b614d3d4d4c0c2c/FLAG28e299b87 [2024-06-21 21:30:04,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229631ed6/84dca2644b7a46719b614d3d4d4c0c2c [2024-06-21 21:30:04,284 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:30:04,284 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:30:04,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_rmo.oepc.yml/witness.yml [2024-06-21 21:30:04,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:30:04,449 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:30:04,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:30:04,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:30:04,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:30:04,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:30:04" (1/2) ... [2024-06-21 21:30:04,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ff51ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:04, skipping insertion in model container [2024-06-21 21:30:04,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:30:04" (1/2) ... [2024-06-21 21:30:04,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4caefcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:04, skipping insertion in model container [2024-06-21 21:30:04,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:04" (2/2) ... [2024-06-21 21:30:04,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ff51ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:04, skipping insertion in model container [2024-06-21 21:30:04,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:04" (2/2) ... [2024-06-21 21:30:04,459 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:30:04,568 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:30:04,569 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$read_delayed_var == 0) [2024-06-21 21:30:04,570 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$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) [2024-06-21 21:30:04,570 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! 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) [2024-06-21 21:30:04,570 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:30:04,570 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-21 21:30:04,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:30:04,954 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:30:04,963 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:30:05,125 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:30:05,168 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:30:05,168 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05 WrapperNode [2024-06-21 21:30:05,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:30:05,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:30:05,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:30:05,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:30:05,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,246 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 282 [2024-06-21 21:30:05,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:30:05,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:30:05,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:30:05,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:30:05,256 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,265 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,280 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 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]. [2024-06-21 21:30:05,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,292 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:30:05,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:30:05,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:30:05,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:30:05,303 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (1/1) ... [2024-06-21 21:30:05,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:30:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:30:05,357 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) [2024-06-21 21:30:05,375 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 [2024-06-21 21:30:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:30:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:30:05,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:30:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:30:05,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:30:05,402 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:30:05,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:30:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:30:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:30:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:30:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:30:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:30:05,406 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:30:05,584 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:30:05,586 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:30:06,045 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:30:06,046 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:30:06,462 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:30:06,462 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:30:06,463 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:30:06 BoogieIcfgContainer [2024-06-21 21:30:06,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:30:06,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:30:06,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:30:06,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:30:06,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:30:04" (1/4) ... [2024-06-21 21:30:06,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbbe040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:30:06, skipping insertion in model container [2024-06-21 21:30:06,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:04" (2/4) ... [2024-06-21 21:30:06,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbbe040 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:30:06, skipping insertion in model container [2024-06-21 21:30:06,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:05" (3/4) ... [2024-06-21 21:30:06,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbbe040 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:30:06, skipping insertion in model container [2024-06-21 21:30:06,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:30:06" (4/4) ... [2024-06-21 21:30:06,473 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_rmo.oepc.i [2024-06-21 21:30:06,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:30:06,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:30:06,487 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:30:06,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:30:06,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:30:06,664 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:30:06,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:30:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:30:06,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:30:06,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:30:06,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:30:06,714 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;@4939dbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:30:06,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:30:06,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:30:06,719 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:30:06,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:30:06,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:06,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:30:06,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:06,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 920004680, now seen corresponding path program 1 times [2024-06-21 21:30:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32673499] [2024-06-21 21:30:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:08,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32673499] [2024-06-21 21:30:08,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32673499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:08,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:08,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:30:08,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743887114] [2024-06-21 21:30:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:08,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:30:08,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:30:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:30:08,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:08,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:08,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:08,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:08,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:09,029 INFO L124 PetriNetUnfolderBase]: 1409/2137 cut-off events. [2024-06-21 21:30:09,029 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 21:30:09,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2137 events. 1409/2137 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10062 event pairs, 873 based on Foata normal form. 2/2104 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-21 21:30:09,044 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 21:30:09,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-21 21:30:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:30:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:30:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 21:30:09,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 21:30:09,055 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-21 21:30:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-21 21:30:09,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:09,061 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:30:09,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:30:09,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:30:09,065 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:30:09,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:09,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:09,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:09,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:30:09,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:09,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash -638704633, now seen corresponding path program 1 times [2024-06-21 21:30:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:09,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095256671] [2024-06-21 21:30:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095256671] [2024-06-21 21:30:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095256671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:30:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712807930] [2024-06-21 21:30:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:11,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:30:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:30:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:30:11,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:11,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2024-06-21 21:30:11,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:11,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:11,675 INFO L124 PetriNetUnfolderBase]: 1400/2124 cut-off events. [2024-06-21 21:30:11,676 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-21 21:30:11,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 2124 events. 1400/2124 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10009 event pairs, 726 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-21 21:30:11,684 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 21:30:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 268 flow [2024-06-21 21:30:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:30:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:30:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 21:30:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-21 21:30:11,686 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-21 21:30:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 268 flow [2024-06-21 21:30:11,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:30:11,687 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:30:11,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:30:11,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:30:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:30:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2024-06-21 21:30:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:11,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:30:11,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1674994820, now seen corresponding path program 1 times [2024-06-21 21:30:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845389110] [2024-06-21 21:30:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:13,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:13,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845389110] [2024-06-21 21:30:13,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845389110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:13,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:13,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:30:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817708517] [2024-06-21 21:30:13,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:30:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:30:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:30:13,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:13,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:13,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:13,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:13,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:14,512 INFO L124 PetriNetUnfolderBase]: 1414/2157 cut-off events. [2024-06-21 21:30:14,512 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-21 21:30:14,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2157 events. 1414/2157 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10335 event pairs, 512 based on Foata normal form. 7/2163 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-21 21:30:14,524 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 21:30:14,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 434 flow [2024-06-21 21:30:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:30:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:30:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:30:14,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-21 21:30:14,529 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:30:14,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 434 flow [2024-06-21 21:30:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:30:14,533 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 21:30:14,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 21:30:14,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 21:30:14,534 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 21:30:14,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:14,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:14,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:14,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:30:14,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:14,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -943839433, now seen corresponding path program 1 times [2024-06-21 21:30:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357245235] [2024-06-21 21:30:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357245235] [2024-06-21 21:30:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357245235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:16,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:16,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:30:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722822851] [2024-06-21 21:30:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:16,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:30:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:30:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:30:16,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:16,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:16,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:16,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:16,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:17,788 INFO L124 PetriNetUnfolderBase]: 1435/2192 cut-off events. [2024-06-21 21:30:17,789 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-21 21:30:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2192 events. 1435/2192 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10563 event pairs, 349 based on Foata normal form. 14/2205 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-21 21:30:17,802 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-21 21:30:17,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 545 flow [2024-06-21 21:30:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 21:30:17,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 21:30:17,804 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 135 transitions. [2024-06-21 21:30:17,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 545 flow [2024-06-21 21:30:17,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 537 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:30:17,812 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 21:30:17,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 21:30:17,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 21:30:17,814 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 21:30:17,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:17,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:17,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:30:17,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:17,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1310142948, now seen corresponding path program 1 times [2024-06-21 21:30:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:17,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041987465] [2024-06-21 21:30:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:19,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041987465] [2024-06-21 21:30:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041987465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:19,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:19,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:30:19,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109189328] [2024-06-21 21:30:19,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:19,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:30:19,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:30:19,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:30:19,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:19,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:19,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:19,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:19,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:19,983 INFO L124 PetriNetUnfolderBase]: 1427/2180 cut-off events. [2024-06-21 21:30:19,983 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-21 21:30:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2180 events. 1427/2180 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10451 event pairs, 503 based on Foata normal form. 3/2182 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-21 21:30:19,995 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 56 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 21:30:19,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 459 flow [2024-06-21 21:30:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:30:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:30:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 21:30:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:30:20,000 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 87 transitions. [2024-06-21 21:30:20,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 459 flow [2024-06-21 21:30:20,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:30:20,009 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 21:30:20,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 21:30:20,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:30:20,012 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 21:30:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:20,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:20,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:30:20,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1969900805, now seen corresponding path program 1 times [2024-06-21 21:30:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:20,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470034945] [2024-06-21 21:30:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:21,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470034945] [2024-06-21 21:30:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470034945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:21,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:21,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:21,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192533496] [2024-06-21 21:30:21,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:21,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:21,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:21,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:21,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:21,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:21,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:22,713 INFO L124 PetriNetUnfolderBase]: 1417/2162 cut-off events. [2024-06-21 21:30:22,714 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2024-06-21 21:30:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2162 events. 1417/2162 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10145 event pairs, 551 based on Foata normal form. 4/2165 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-21 21:30:22,725 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-21 21:30:22,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 521 flow [2024-06-21 21:30:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:30:22,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:30:22,729 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:30:22,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 521 flow [2024-06-21 21:30:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 489 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:30:22,735 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 339 flow [2024-06-21 21:30:22,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-21 21:30:22,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 21:30:22,738 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 339 flow [2024-06-21 21:30:22,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:22,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:22,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:22,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:30:22,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:22,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -937596197, now seen corresponding path program 1 times [2024-06-21 21:30:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828423149] [2024-06-21 21:30:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:24,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828423149] [2024-06-21 21:30:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828423149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:24,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:24,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:24,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725152571] [2024-06-21 21:30:24,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:24,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:24,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:24,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:24,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:25,943 INFO L124 PetriNetUnfolderBase]: 1427/2178 cut-off events. [2024-06-21 21:30:25,943 INFO L125 PetriNetUnfolderBase]: For 5853/5855 co-relation queries the response was YES. [2024-06-21 21:30:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2178 events. 1427/2178 cut-off events. For 5853/5855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10317 event pairs, 496 based on Foata normal form. 8/2185 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-21 21:30:25,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 21:30:25,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 627 flow [2024-06-21 21:30:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:30:25,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 21:30:25,962 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:30:25,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 627 flow [2024-06-21 21:30:25,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 621 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:30:25,967 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 411 flow [2024-06-21 21:30:25,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 21:30:25,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:30:25,968 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 411 flow [2024-06-21 21:30:25,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:25,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:25,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:25,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:30:25,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:25,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -621902117, now seen corresponding path program 2 times [2024-06-21 21:30:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:25,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364326201] [2024-06-21 21:30:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:27,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364326201] [2024-06-21 21:30:27,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364326201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:27,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496715696] [2024-06-21 21:30:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:27,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:27,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:27,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:27,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:27,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:28,855 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-21 21:30:28,855 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-21 21:30:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10010 event pairs, 514 based on Foata normal form. 3/2137 useless extension candidates. Maximal degree in co-relation 7846. Up to 1973 conditions per place. [2024-06-21 21:30:28,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-21 21:30:28,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 633 flow [2024-06-21 21:30:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 21:30:28,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:30:28,867 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 411 flow. Second operand 6 states and 108 transitions. [2024-06-21 21:30:28,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 633 flow [2024-06-21 21:30:28,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:28,872 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 433 flow [2024-06-21 21:30:28,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-21 21:30:28,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 21:30:28,873 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 433 flow [2024-06-21 21:30:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:28,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:28,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:28,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:30:28,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:28,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1038449146, now seen corresponding path program 1 times [2024-06-21 21:30:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139986792] [2024-06-21 21:30:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:30,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139986792] [2024-06-21 21:30:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139986792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:30,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:30,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107001527] [2024-06-21 21:30:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:30,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:30,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:30,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:30,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:30,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:30,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:32,421 INFO L124 PetriNetUnfolderBase]: 2219/3312 cut-off events. [2024-06-21 21:30:32,421 INFO L125 PetriNetUnfolderBase]: For 12829/12831 co-relation queries the response was YES. [2024-06-21 21:30:32,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 3312 events. 2219/3312 cut-off events. For 12829/12831 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16084 event pairs, 572 based on Foata normal form. 22/3333 useless extension candidates. Maximal degree in co-relation 12361. Up to 2314 conditions per place. [2024-06-21 21:30:32,440 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 21:30:32,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 171 transitions, 1314 flow [2024-06-21 21:30:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:30:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:30:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 21:30:32,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-21 21:30:32,442 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 433 flow. Second operand 11 states and 215 transitions. [2024-06-21 21:30:32,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 171 transitions, 1314 flow [2024-06-21 21:30:32,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 1179 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:30:32,453 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 776 flow [2024-06-21 21:30:32,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 21:30:32,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 21:30:32,454 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 776 flow [2024-06-21 21:30:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:32,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:32,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:32,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:30:32,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:32,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash 828588444, now seen corresponding path program 2 times [2024-06-21 21:30:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138626335] [2024-06-21 21:30:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138626335] [2024-06-21 21:30:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138626335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:34,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981307354] [2024-06-21 21:30:34,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:34,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:34,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:34,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:34,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:34,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:36,218 INFO L124 PetriNetUnfolderBase]: 3049/4491 cut-off events. [2024-06-21 21:30:36,218 INFO L125 PetriNetUnfolderBase]: For 23357/23366 co-relation queries the response was YES. [2024-06-21 21:30:36,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20256 conditions, 4491 events. 3049/4491 cut-off events. For 23357/23366 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22486 event pairs, 668 based on Foata normal form. 44/4533 useless extension candidates. Maximal degree in co-relation 20220. Up to 3089 conditions per place. [2024-06-21 21:30:36,245 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 106 selfloop transitions, 86 changer transitions 0/196 dead transitions. [2024-06-21 21:30:36,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 196 transitions, 1788 flow [2024-06-21 21:30:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:30:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:30:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:30:36,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:30:36,247 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 776 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:30:36,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 196 transitions, 1788 flow [2024-06-21 21:30:36,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 196 transitions, 1718 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 21:30:36,274 INFO L231 Difference]: Finished difference. Result has 94 places, 150 transitions, 1455 flow [2024-06-21 21:30:36,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1455, PETRI_PLACES=94, PETRI_TRANSITIONS=150} [2024-06-21 21:30:36,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 21:30:36,274 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 150 transitions, 1455 flow [2024-06-21 21:30:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:36,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:36,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:30:36,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:36,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2098857384, now seen corresponding path program 3 times [2024-06-21 21:30:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977285939] [2024-06-21 21:30:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977285939] [2024-06-21 21:30:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977285939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092145651] [2024-06-21 21:30:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:38,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 150 transitions, 1455 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:38,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:39,867 INFO L124 PetriNetUnfolderBase]: 3039/4471 cut-off events. [2024-06-21 21:30:39,867 INFO L125 PetriNetUnfolderBase]: For 30720/30722 co-relation queries the response was YES. [2024-06-21 21:30:39,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23178 conditions, 4471 events. 3039/4471 cut-off events. For 30720/30722 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22002 event pairs, 737 based on Foata normal form. 4/4473 useless extension candidates. Maximal degree in co-relation 23134. Up to 3794 conditions per place. [2024-06-21 21:30:39,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 69 changer transitions 0/238 dead transitions. [2024-06-21 21:30:39,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 238 transitions, 2715 flow [2024-06-21 21:30:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:30:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:30:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:30:39,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 21:30:39,925 INFO L175 Difference]: Start difference. First operand has 94 places, 150 transitions, 1455 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:30:39,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 238 transitions, 2715 flow [2024-06-21 21:30:39,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 238 transitions, 2631 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 21:30:39,973 INFO L231 Difference]: Finished difference. Result has 102 places, 202 transitions, 2262 flow [2024-06-21 21:30:39,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=102, PETRI_TRANSITIONS=202} [2024-06-21 21:30:39,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 21:30:39,974 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 202 transitions, 2262 flow [2024-06-21 21:30:39,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:39,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:39,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:39,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:30:39,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:39,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1863405202, now seen corresponding path program 4 times [2024-06-21 21:30:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:39,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257564540] [2024-06-21 21:30:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257564540] [2024-06-21 21:30:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257564540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:42,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655201588] [2024-06-21 21:30:42,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:42,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:42,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:42,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:42,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 202 transitions, 2262 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:42,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:42,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:43,486 INFO L124 PetriNetUnfolderBase]: 3067/4535 cut-off events. [2024-06-21 21:30:43,486 INFO L125 PetriNetUnfolderBase]: For 37671/37673 co-relation queries the response was YES. [2024-06-21 21:30:43,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25109 conditions, 4535 events. 3067/4535 cut-off events. For 37671/37673 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22688 event pairs, 776 based on Foata normal form. 18/4551 useless extension candidates. Maximal degree in co-relation 25059. Up to 3991 conditions per place. [2024-06-21 21:30:43,534 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 153 selfloop transitions, 89 changer transitions 0/246 dead transitions. [2024-06-21 21:30:43,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 246 transitions, 3020 flow [2024-06-21 21:30:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:30:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:30:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:30:43,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:30:43,536 INFO L175 Difference]: Start difference. First operand has 102 places, 202 transitions, 2262 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:30:43,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 246 transitions, 3020 flow [2024-06-21 21:30:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 246 transitions, 2978 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 21:30:43,608 INFO L231 Difference]: Finished difference. Result has 110 places, 214 transitions, 2581 flow [2024-06-21 21:30:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2581, PETRI_PLACES=110, PETRI_TRANSITIONS=214} [2024-06-21 21:30:43,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 21:30:43,610 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 214 transitions, 2581 flow [2024-06-21 21:30:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:43,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:30:43,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:43,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1863651280, now seen corresponding path program 1 times [2024-06-21 21:30:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50720487] [2024-06-21 21:30:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50720487] [2024-06-21 21:30:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50720487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:46,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431459507] [2024-06-21 21:30:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:46,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:46,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 214 transitions, 2581 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:46,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:46,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:47,554 INFO L124 PetriNetUnfolderBase]: 3059/4512 cut-off events. [2024-06-21 21:30:47,555 INFO L125 PetriNetUnfolderBase]: For 42555/42557 co-relation queries the response was YES. [2024-06-21 21:30:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26062 conditions, 4512 events. 3059/4512 cut-off events. For 42555/42557 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22460 event pairs, 904 based on Foata normal form. 4/4515 useless extension candidates. Maximal degree in co-relation 26008. Up to 4383 conditions per place. [2024-06-21 21:30:47,603 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 14 changer transitions 0/241 dead transitions. [2024-06-21 21:30:47,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 241 transitions, 3149 flow [2024-06-21 21:30:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:30:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:30:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:30:47,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:30:47,605 INFO L175 Difference]: Start difference. First operand has 110 places, 214 transitions, 2581 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:30:47,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 241 transitions, 3149 flow [2024-06-21 21:30:47,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 241 transitions, 2947 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:30:47,672 INFO L231 Difference]: Finished difference. Result has 112 places, 216 transitions, 2436 flow [2024-06-21 21:30:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2436, PETRI_PLACES=112, PETRI_TRANSITIONS=216} [2024-06-21 21:30:47,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 21:30:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 216 transitions, 2436 flow [2024-06-21 21:30:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:47,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:47,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:30:47,674 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash -83565869, now seen corresponding path program 1 times [2024-06-21 21:30:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077799021] [2024-06-21 21:30:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:50,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:50,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077799021] [2024-06-21 21:30:50,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077799021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:50,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:50,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958616204] [2024-06-21 21:30:50,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:50,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:50,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:50,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 216 transitions, 2436 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:50,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:50,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:50,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:51,735 INFO L124 PetriNetUnfolderBase]: 3243/4835 cut-off events. [2024-06-21 21:30:51,735 INFO L125 PetriNetUnfolderBase]: For 45608/45624 co-relation queries the response was YES. [2024-06-21 21:30:51,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27230 conditions, 4835 events. 3243/4835 cut-off events. For 45608/45624 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 25000 event pairs, 740 based on Foata normal form. 44/4878 useless extension candidates. Maximal degree in co-relation 27175. Up to 2902 conditions per place. [2024-06-21 21:30:51,766 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 173 changer transitions 0/298 dead transitions. [2024-06-21 21:30:51,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 298 transitions, 3640 flow [2024-06-21 21:30:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 21:30:51,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:30:51,768 INFO L175 Difference]: Start difference. First operand has 112 places, 216 transitions, 2436 flow. Second operand 9 states and 180 transitions. [2024-06-21 21:30:51,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 298 transitions, 3640 flow [2024-06-21 21:30:51,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 298 transitions, 3603 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:30:51,838 INFO L231 Difference]: Finished difference. Result has 118 places, 243 transitions, 3241 flow [2024-06-21 21:30:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3241, PETRI_PLACES=118, PETRI_TRANSITIONS=243} [2024-06-21 21:30:51,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:30:51,839 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 243 transitions, 3241 flow [2024-06-21 21:30:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:30:51,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:51,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 913247745, now seen corresponding path program 2 times [2024-06-21 21:30:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:51,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542025707] [2024-06-21 21:30:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542025707] [2024-06-21 21:30:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542025707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:54,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:54,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977937051] [2024-06-21 21:30:54,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:54,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:54,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:54,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 243 transitions, 3241 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:54,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:54,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:55,563 INFO L124 PetriNetUnfolderBase]: 3283/4913 cut-off events. [2024-06-21 21:30:55,564 INFO L125 PetriNetUnfolderBase]: For 56982/56990 co-relation queries the response was YES. [2024-06-21 21:30:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30735 conditions, 4913 events. 3283/4913 cut-off events. For 56982/56990 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25578 event pairs, 639 based on Foata normal form. 34/4946 useless extension candidates. Maximal degree in co-relation 30677. Up to 2944 conditions per place. [2024-06-21 21:30:55,604 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 168 changer transitions 0/289 dead transitions. [2024-06-21 21:30:55,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 289 transitions, 4100 flow [2024-06-21 21:30:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:30:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:30:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:30:55,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:30:55,606 INFO L175 Difference]: Start difference. First operand has 118 places, 243 transitions, 3241 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:30:55,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 289 transitions, 4100 flow [2024-06-21 21:30:55,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 289 transitions, 3827 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:30:55,722 INFO L231 Difference]: Finished difference. Result has 121 places, 253 transitions, 3483 flow [2024-06-21 21:30:55,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=121, PETRI_TRANSITIONS=253} [2024-06-21 21:30:55,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 21:30:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 253 transitions, 3483 flow [2024-06-21 21:30:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:55,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:55,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:30:55,724 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:55,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash -640067741, now seen corresponding path program 3 times [2024-06-21 21:30:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:55,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31093243] [2024-06-21 21:30:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:55,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:57,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:57,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31093243] [2024-06-21 21:30:57,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31093243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:57,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:57,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:30:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776303357] [2024-06-21 21:30:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:57,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:30:57,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:30:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:30:57,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:57,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 253 transitions, 3483 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:57,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:57,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:59,555 INFO L124 PetriNetUnfolderBase]: 3273/4898 cut-off events. [2024-06-21 21:30:59,555 INFO L125 PetriNetUnfolderBase]: For 62079/62101 co-relation queries the response was YES. [2024-06-21 21:30:59,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31089 conditions, 4898 events. 3273/4898 cut-off events. For 62079/62101 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25291 event pairs, 793 based on Foata normal form. 16/4912 useless extension candidates. Maximal degree in co-relation 31030. Up to 4128 conditions per place. [2024-06-21 21:30:59,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 67 changer transitions 0/284 dead transitions. [2024-06-21 21:30:59,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 284 transitions, 4193 flow [2024-06-21 21:30:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:30:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:30:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:30:59,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:30:59,595 INFO L175 Difference]: Start difference. First operand has 121 places, 253 transitions, 3483 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:30:59,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 284 transitions, 4193 flow [2024-06-21 21:30:59,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 284 transitions, 3867 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 21:30:59,740 INFO L231 Difference]: Finished difference. Result has 124 places, 257 transitions, 3394 flow [2024-06-21 21:30:59,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3394, PETRI_PLACES=124, PETRI_TRANSITIONS=257} [2024-06-21 21:30:59,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-21 21:30:59,740 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 257 transitions, 3394 flow [2024-06-21 21:30:59,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:59,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:59,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:59,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:30:59,741 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:59,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 891786455, now seen corresponding path program 1 times [2024-06-21 21:30:59,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:59,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126106955] [2024-06-21 21:30:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:59,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:02,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:02,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126106955] [2024-06-21 21:31:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126106955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:02,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:02,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823589766] [2024-06-21 21:31:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:02,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:02,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:02,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:02,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 257 transitions, 3394 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:02,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:02,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:03,375 INFO L124 PetriNetUnfolderBase]: 3301/4943 cut-off events. [2024-06-21 21:31:03,375 INFO L125 PetriNetUnfolderBase]: For 63660/63668 co-relation queries the response was YES. [2024-06-21 21:31:03,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30605 conditions, 4943 events. 3301/4943 cut-off events. For 63660/63668 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25907 event pairs, 659 based on Foata normal form. 12/4954 useless extension candidates. Maximal degree in co-relation 30544. Up to 4278 conditions per place. [2024-06-21 21:31:03,411 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 226 selfloop transitions, 63 changer transitions 0/293 dead transitions. [2024-06-21 21:31:03,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 293 transitions, 4216 flow [2024-06-21 21:31:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:31:03,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 21:31:03,420 INFO L175 Difference]: Start difference. First operand has 124 places, 257 transitions, 3394 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:31:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 293 transitions, 4216 flow [2024-06-21 21:31:03,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 293 transitions, 4144 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:03,545 INFO L231 Difference]: Finished difference. Result has 128 places, 261 transitions, 3527 flow [2024-06-21 21:31:03,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3527, PETRI_PLACES=128, PETRI_TRANSITIONS=261} [2024-06-21 21:31:03,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 21:31:03,546 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 261 transitions, 3527 flow [2024-06-21 21:31:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:03,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:03,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:03,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:31:03,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:03,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1589131167, now seen corresponding path program 2 times [2024-06-21 21:31:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084011583] [2024-06-21 21:31:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:03,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084011583] [2024-06-21 21:31:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084011583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958576124] [2024-06-21 21:31:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:06,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:06,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:06,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 261 transitions, 3527 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:06,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:06,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:06,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:07,488 INFO L124 PetriNetUnfolderBase]: 3288/4914 cut-off events. [2024-06-21 21:31:07,488 INFO L125 PetriNetUnfolderBase]: For 68630/68634 co-relation queries the response was YES. [2024-06-21 21:31:07,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30653 conditions, 4914 events. 3288/4914 cut-off events. For 68630/68634 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25453 event pairs, 824 based on Foata normal form. 8/4921 useless extension candidates. Maximal degree in co-relation 30590. Up to 4420 conditions per place. [2024-06-21 21:31:07,522 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 76 changer transitions 0/291 dead transitions. [2024-06-21 21:31:07,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 291 transitions, 4212 flow [2024-06-21 21:31:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:31:07,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:31:07,525 INFO L175 Difference]: Start difference. First operand has 128 places, 261 transitions, 3527 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:31:07,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 291 transitions, 4212 flow [2024-06-21 21:31:07,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 291 transitions, 4098 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:07,657 INFO L231 Difference]: Finished difference. Result has 132 places, 261 transitions, 3579 flow [2024-06-21 21:31:07,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3579, PETRI_PLACES=132, PETRI_TRANSITIONS=261} [2024-06-21 21:31:07,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 21:31:07,658 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 261 transitions, 3579 flow [2024-06-21 21:31:07,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:07,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:07,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:07,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:31:07,658 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:07,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1452546693, now seen corresponding path program 1 times [2024-06-21 21:31:07,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:07,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942581637] [2024-06-21 21:31:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:07,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942581637] [2024-06-21 21:31:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942581637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:10,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:31:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270158450] [2024-06-21 21:31:10,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:31:10,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:31:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:31:10,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:10,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 261 transitions, 3579 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:10,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:10,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:10,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:12,517 INFO L124 PetriNetUnfolderBase]: 3688/5566 cut-off events. [2024-06-21 21:31:12,517 INFO L125 PetriNetUnfolderBase]: For 91011/91015 co-relation queries the response was YES. [2024-06-21 21:31:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33493 conditions, 5566 events. 3688/5566 cut-off events. For 91011/91015 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29919 event pairs, 734 based on Foata normal form. 94/5659 useless extension candidates. Maximal degree in co-relation 33428. Up to 2799 conditions per place. [2024-06-21 21:31:12,565 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 122 selfloop transitions, 194 changer transitions 0/320 dead transitions. [2024-06-21 21:31:12,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 320 transitions, 4518 flow [2024-06-21 21:31:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:31:12,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 21:31:12,567 INFO L175 Difference]: Start difference. First operand has 132 places, 261 transitions, 3579 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:31:12,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 320 transitions, 4518 flow [2024-06-21 21:31:12,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 320 transitions, 4352 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:12,718 INFO L231 Difference]: Finished difference. Result has 136 places, 264 transitions, 3886 flow [2024-06-21 21:31:12,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3886, PETRI_PLACES=136, PETRI_TRANSITIONS=264} [2024-06-21 21:31:12,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 21:31:12,718 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 264 transitions, 3886 flow [2024-06-21 21:31:12,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:12,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:12,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:12,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:31:12,719 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:12,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash -135296349, now seen corresponding path program 2 times [2024-06-21 21:31:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:12,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117642955] [2024-06-21 21:31:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:15,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:15,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117642955] [2024-06-21 21:31:15,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117642955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:15,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:15,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:15,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283636303] [2024-06-21 21:31:15,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:15,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:15,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:15,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 264 transitions, 3886 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:15,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:15,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:16,949 INFO L124 PetriNetUnfolderBase]: 3708/5590 cut-off events. [2024-06-21 21:31:16,949 INFO L125 PetriNetUnfolderBase]: For 88456/88458 co-relation queries the response was YES. [2024-06-21 21:31:16,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35549 conditions, 5590 events. 3708/5590 cut-off events. For 88456/88458 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29880 event pairs, 929 based on Foata normal form. 4/5592 useless extension candidates. Maximal degree in co-relation 35483. Up to 4827 conditions per place. [2024-06-21 21:31:16,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 81 changer transitions 0/301 dead transitions. [2024-06-21 21:31:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 301 transitions, 4628 flow [2024-06-21 21:31:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:31:16,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:31:16,992 INFO L175 Difference]: Start difference. First operand has 136 places, 264 transitions, 3886 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:31:16,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 301 transitions, 4628 flow [2024-06-21 21:31:17,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 301 transitions, 4318 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:31:17,166 INFO L231 Difference]: Finished difference. Result has 137 places, 266 transitions, 3783 flow [2024-06-21 21:31:17,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=137, PETRI_TRANSITIONS=266} [2024-06-21 21:31:17,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:31:17,167 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 266 transitions, 3783 flow [2024-06-21 21:31:17,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:17,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:17,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:31:17,168 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:17,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -268901199, now seen corresponding path program 3 times [2024-06-21 21:31:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131044876] [2024-06-21 21:31:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131044876] [2024-06-21 21:31:20,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131044876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:20,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:31:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298747703] [2024-06-21 21:31:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:31:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:31:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:31:20,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:20,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 266 transitions, 3783 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:20,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:20,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:20,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:22,014 INFO L124 PetriNetUnfolderBase]: 3796/5752 cut-off events. [2024-06-21 21:31:22,014 INFO L125 PetriNetUnfolderBase]: For 94480/94482 co-relation queries the response was YES. [2024-06-21 21:31:22,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35657 conditions, 5752 events. 3796/5752 cut-off events. For 94480/94482 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31186 event pairs, 971 based on Foata normal form. 18/5768 useless extension candidates. Maximal degree in co-relation 35590. Up to 5032 conditions per place. [2024-06-21 21:31:22,065 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 95 changer transitions 0/311 dead transitions. [2024-06-21 21:31:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 311 transitions, 4638 flow [2024-06-21 21:31:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:31:22,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:31:22,067 INFO L175 Difference]: Start difference. First operand has 137 places, 266 transitions, 3783 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:31:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 311 transitions, 4638 flow [2024-06-21 21:31:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 311 transitions, 4449 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:22,246 INFO L231 Difference]: Finished difference. Result has 140 places, 269 transitions, 3867 flow [2024-06-21 21:31:22,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3867, PETRI_PLACES=140, PETRI_TRANSITIONS=269} [2024-06-21 21:31:22,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 21:31:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 269 transitions, 3867 flow [2024-06-21 21:31:22,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:22,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:22,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:31:22,255 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:22,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -32429169, now seen corresponding path program 4 times [2024-06-21 21:31:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89671769] [2024-06-21 21:31:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89671769] [2024-06-21 21:31:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89671769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817390026] [2024-06-21 21:31:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 269 transitions, 3867 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:26,801 INFO L124 PetriNetUnfolderBase]: 3788/5722 cut-off events. [2024-06-21 21:31:26,801 INFO L125 PetriNetUnfolderBase]: For 96800/96802 co-relation queries the response was YES. [2024-06-21 21:31:26,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35826 conditions, 5722 events. 3788/5722 cut-off events. For 96800/96802 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30696 event pairs, 906 based on Foata normal form. 4/5724 useless extension candidates. Maximal degree in co-relation 35758. Up to 4655 conditions per place. [2024-06-21 21:31:26,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 88 changer transitions 0/312 dead transitions. [2024-06-21 21:31:26,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 312 transitions, 4690 flow [2024-06-21 21:31:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:31:26,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:31:26,850 INFO L175 Difference]: Start difference. First operand has 140 places, 269 transitions, 3867 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:31:26,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 312 transitions, 4690 flow [2024-06-21 21:31:27,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 312 transitions, 4440 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:31:27,004 INFO L231 Difference]: Finished difference. Result has 142 places, 273 transitions, 3901 flow [2024-06-21 21:31:27,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3901, PETRI_PLACES=142, PETRI_TRANSITIONS=273} [2024-06-21 21:31:27,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 21:31:27,005 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 273 transitions, 3901 flow [2024-06-21 21:31:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:27,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:27,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:31:27,006 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:27,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2064637724, now seen corresponding path program 1 times [2024-06-21 21:31:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936188411] [2024-06-21 21:31:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936188411] [2024-06-21 21:31:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936188411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:28,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:28,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513627555] [2024-06-21 21:31:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:28,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:28,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:28,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:28,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 273 transitions, 3901 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:28,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:28,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:28,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:30,322 INFO L124 PetriNetUnfolderBase]: 3782/5739 cut-off events. [2024-06-21 21:31:30,322 INFO L125 PetriNetUnfolderBase]: For 100104/100106 co-relation queries the response was YES. [2024-06-21 21:31:30,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 5739 events. 3782/5739 cut-off events. For 100104/100106 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 31264 event pairs, 1194 based on Foata normal form. 2/5740 useless extension candidates. Maximal degree in co-relation 35890. Up to 5580 conditions per place. [2024-06-21 21:31:30,365 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 271 selfloop transitions, 11 changer transitions 0/286 dead transitions. [2024-06-21 21:31:30,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 286 transitions, 4521 flow [2024-06-21 21:31:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:31:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:31:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 21:31:30,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:31:30,367 INFO L175 Difference]: Start difference. First operand has 142 places, 273 transitions, 3901 flow. Second operand 5 states and 82 transitions. [2024-06-21 21:31:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 286 transitions, 4521 flow [2024-06-21 21:31:30,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 286 transitions, 4332 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:30,543 INFO L231 Difference]: Finished difference. Result has 142 places, 276 transitions, 3774 flow [2024-06-21 21:31:30,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3774, PETRI_PLACES=142, PETRI_TRANSITIONS=276} [2024-06-21 21:31:30,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 21:31:30,549 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 276 transitions, 3774 flow [2024-06-21 21:31:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:30,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:30,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:31:30,550 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1929862070, now seen corresponding path program 1 times [2024-06-21 21:31:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144916972] [2024-06-21 21:31:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:33,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144916972] [2024-06-21 21:31:33,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144916972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:33,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:33,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627923292] [2024-06-21 21:31:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:33,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:33,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 276 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:33,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:33,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:33,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:35,349 INFO L124 PetriNetUnfolderBase]: 4977/7631 cut-off events. [2024-06-21 21:31:35,349 INFO L125 PetriNetUnfolderBase]: For 174092/174100 co-relation queries the response was YES. [2024-06-21 21:31:35,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46801 conditions, 7631 events. 4977/7631 cut-off events. For 174092/174100 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44708 event pairs, 1007 based on Foata normal form. 78/7708 useless extension candidates. Maximal degree in co-relation 46730. Up to 2842 conditions per place. [2024-06-21 21:31:35,410 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 192 selfloop transitions, 164 changer transitions 0/360 dead transitions. [2024-06-21 21:31:35,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 360 transitions, 5166 flow [2024-06-21 21:31:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 21:31:35,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 21:31:35,412 INFO L175 Difference]: Start difference. First operand has 142 places, 276 transitions, 3774 flow. Second operand 9 states and 192 transitions. [2024-06-21 21:31:35,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 360 transitions, 5166 flow [2024-06-21 21:31:35,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 360 transitions, 5126 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:35,691 INFO L231 Difference]: Finished difference. Result has 150 places, 286 transitions, 4381 flow [2024-06-21 21:31:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4381, PETRI_PLACES=150, PETRI_TRANSITIONS=286} [2024-06-21 21:31:35,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:31:35,692 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 286 transitions, 4381 flow [2024-06-21 21:31:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:35,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:31:35,693 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:35,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2018427830, now seen corresponding path program 2 times [2024-06-21 21:31:35,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:35,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395702901] [2024-06-21 21:31:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:35,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:38,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:38,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395702901] [2024-06-21 21:31:38,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395702901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000716325] [2024-06-21 21:31:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:38,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:38,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:38,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:38,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 286 transitions, 4381 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:38,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:38,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:38,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:40,632 INFO L124 PetriNetUnfolderBase]: 5653/8707 cut-off events. [2024-06-21 21:31:40,632 INFO L125 PetriNetUnfolderBase]: For 231688/231692 co-relation queries the response was YES. [2024-06-21 21:31:40,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55405 conditions, 8707 events. 5653/8707 cut-off events. For 231688/231692 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 52659 event pairs, 1547 based on Foata normal form. 74/8780 useless extension candidates. Maximal degree in co-relation 55331. Up to 4650 conditions per place. [2024-06-21 21:31:40,706 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 162 selfloop transitions, 195 changer transitions 0/361 dead transitions. [2024-06-21 21:31:40,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 361 transitions, 5632 flow [2024-06-21 21:31:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 21:31:40,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 21:31:40,708 INFO L175 Difference]: Start difference. First operand has 150 places, 286 transitions, 4381 flow. Second operand 10 states and 204 transitions. [2024-06-21 21:31:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 361 transitions, 5632 flow [2024-06-21 21:31:41,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 361 transitions, 5358 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:41,151 INFO L231 Difference]: Finished difference. Result has 157 places, 293 transitions, 4721 flow [2024-06-21 21:31:41,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4721, PETRI_PLACES=157, PETRI_TRANSITIONS=293} [2024-06-21 21:31:41,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:31:41,151 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 293 transitions, 4721 flow [2024-06-21 21:31:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:41,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:41,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:41,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:31:41,152 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:41,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1297486804, now seen corresponding path program 3 times [2024-06-21 21:31:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:41,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432323220] [2024-06-21 21:31:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:43,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432323220] [2024-06-21 21:31:43,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432323220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:43,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:43,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986225258] [2024-06-21 21:31:43,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:43,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:43,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:43,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:43,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:43,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 293 transitions, 4721 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:43,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:43,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:43,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:46,762 INFO L124 PetriNetUnfolderBase]: 6262/9775 cut-off events. [2024-06-21 21:31:46,762 INFO L125 PetriNetUnfolderBase]: For 273009/273025 co-relation queries the response was YES. [2024-06-21 21:31:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62676 conditions, 9775 events. 6262/9775 cut-off events. For 273009/273025 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 61924 event pairs, 1700 based on Foata normal form. 80/9854 useless extension candidates. Maximal degree in co-relation 62599. Up to 6030 conditions per place. [2024-06-21 21:31:46,839 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 190 changer transitions 0/373 dead transitions. [2024-06-21 21:31:46,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 373 transitions, 6058 flow [2024-06-21 21:31:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 21:31:46,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 21:31:46,842 INFO L175 Difference]: Start difference. First operand has 157 places, 293 transitions, 4721 flow. Second operand 10 states and 208 transitions. [2024-06-21 21:31:46,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 373 transitions, 6058 flow [2024-06-21 21:31:47,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 373 transitions, 5630 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:31:47,377 INFO L231 Difference]: Finished difference. Result has 161 places, 299 transitions, 4860 flow [2024-06-21 21:31:47,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4860, PETRI_PLACES=161, PETRI_TRANSITIONS=299} [2024-06-21 21:31:47,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 21:31:47,378 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 299 transitions, 4860 flow [2024-06-21 21:31:47,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:47,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:47,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:31:47,378 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:47,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1297634674, now seen corresponding path program 4 times [2024-06-21 21:31:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:47,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306205835] [2024-06-21 21:31:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:49,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306205835] [2024-06-21 21:31:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306205835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:49,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588959016] [2024-06-21 21:31:49,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:49,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:49,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 299 transitions, 4860 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:49,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:49,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:49,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:52,854 INFO L124 PetriNetUnfolderBase]: 6574/10299 cut-off events. [2024-06-21 21:31:52,854 INFO L125 PetriNetUnfolderBase]: For 289725/289741 co-relation queries the response was YES. [2024-06-21 21:31:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64866 conditions, 10299 events. 6574/10299 cut-off events. For 289725/289741 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 66264 event pairs, 2276 based on Foata normal form. 90/10388 useless extension candidates. Maximal degree in co-relation 64787. Up to 7665 conditions per place. [2024-06-21 21:31:52,934 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 175 selfloop transitions, 187 changer transitions 0/366 dead transitions. [2024-06-21 21:31:52,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 366 transitions, 5969 flow [2024-06-21 21:31:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 21:31:52,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 21:31:52,936 INFO L175 Difference]: Start difference. First operand has 161 places, 299 transitions, 4860 flow. Second operand 10 states and 201 transitions. [2024-06-21 21:31:52,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 366 transitions, 5969 flow [2024-06-21 21:31:53,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 366 transitions, 5663 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:53,508 INFO L231 Difference]: Finished difference. Result has 165 places, 301 transitions, 5011 flow [2024-06-21 21:31:53,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5011, PETRI_PLACES=165, PETRI_TRANSITIONS=301} [2024-06-21 21:31:53,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 21:31:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 301 transitions, 5011 flow [2024-06-21 21:31:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:53,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:31:53,510 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2079061044, now seen corresponding path program 5 times [2024-06-21 21:31:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:53,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523088624] [2024-06-21 21:31:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:56,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523088624] [2024-06-21 21:31:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523088624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:56,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471536069] [2024-06-21 21:31:56,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:56,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:56,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 301 transitions, 5011 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:56,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:56,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:59,023 INFO L124 PetriNetUnfolderBase]: 6703/10512 cut-off events. [2024-06-21 21:31:59,023 INFO L125 PetriNetUnfolderBase]: For 294929/294937 co-relation queries the response was YES. [2024-06-21 21:31:59,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65759 conditions, 10512 events. 6703/10512 cut-off events. For 294929/294937 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68134 event pairs, 2237 based on Foata normal form. 80/10591 useless extension candidates. Maximal degree in co-relation 65678. Up to 7896 conditions per place. [2024-06-21 21:31:59,124 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 174 selfloop transitions, 173 changer transitions 0/351 dead transitions. [2024-06-21 21:31:59,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 351 transitions, 5969 flow [2024-06-21 21:31:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:31:59,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:31:59,127 INFO L175 Difference]: Start difference. First operand has 165 places, 301 transitions, 5011 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:31:59,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 351 transitions, 5969 flow [2024-06-21 21:31:59,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 351 transitions, 5572 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 21:31:59,759 INFO L231 Difference]: Finished difference. Result has 166 places, 303 transitions, 5045 flow [2024-06-21 21:31:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5045, PETRI_PLACES=166, PETRI_TRANSITIONS=303} [2024-06-21 21:31:59,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:31:59,760 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 303 transitions, 5045 flow [2024-06-21 21:31:59,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:59,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:59,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:59,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:31:59,761 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:59,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1303212256, now seen corresponding path program 1 times [2024-06-21 21:31:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:59,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136600123] [2024-06-21 21:31:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:59,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:02,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:02,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136600123] [2024-06-21 21:32:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136600123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:02,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304744614] [2024-06-21 21:32:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:02,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:02,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:02,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:02,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 303 transitions, 5045 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:32:02,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:02,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:02,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:05,290 INFO L124 PetriNetUnfolderBase]: 6814/10761 cut-off events. [2024-06-21 21:32:05,291 INFO L125 PetriNetUnfolderBase]: For 293943/293951 co-relation queries the response was YES. [2024-06-21 21:32:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65964 conditions, 10761 events. 6814/10761 cut-off events. For 293943/293951 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 70529 event pairs, 2096 based on Foata normal form. 60/10820 useless extension candidates. Maximal degree in co-relation 65882. Up to 6089 conditions per place. [2024-06-21 21:32:05,379 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 177 changer transitions 0/357 dead transitions. [2024-06-21 21:32:05,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 357 transitions, 6015 flow [2024-06-21 21:32:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:32:05,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 21:32:05,381 INFO L175 Difference]: Start difference. First operand has 166 places, 303 transitions, 5045 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:32:05,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 357 transitions, 6015 flow [2024-06-21 21:32:05,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 357 transitions, 5642 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:06,000 INFO L231 Difference]: Finished difference. Result has 168 places, 304 transitions, 5074 flow [2024-06-21 21:32:06,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5074, PETRI_PLACES=168, PETRI_TRANSITIONS=304} [2024-06-21 21:32:06,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:32:06,001 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 304 transitions, 5074 flow [2024-06-21 21:32:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:32:06,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:06,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:06,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:32:06,002 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:06,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash -924719614, now seen corresponding path program 6 times [2024-06-21 21:32:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:06,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279161087] [2024-06-21 21:32:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:08,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279161087] [2024-06-21 21:32:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279161087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:08,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:08,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843486185] [2024-06-21 21:32:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 304 transitions, 5074 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:08,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:11,467 INFO L124 PetriNetUnfolderBase]: 6846/10832 cut-off events. [2024-06-21 21:32:11,468 INFO L125 PetriNetUnfolderBase]: For 288696/288718 co-relation queries the response was YES. [2024-06-21 21:32:11,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66334 conditions, 10832 events. 6846/10832 cut-off events. For 288696/288718 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71229 event pairs, 2740 based on Foata normal form. 32/10862 useless extension candidates. Maximal degree in co-relation 66251. Up to 9831 conditions per place. [2024-06-21 21:32:11,561 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 68 changer transitions 0/342 dead transitions. [2024-06-21 21:32:11,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 342 transitions, 5894 flow [2024-06-21 21:32:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:32:11,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:32:11,570 INFO L175 Difference]: Start difference. First operand has 168 places, 304 transitions, 5074 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:32:11,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 342 transitions, 5894 flow [2024-06-21 21:32:12,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 342 transitions, 5422 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:12,117 INFO L231 Difference]: Finished difference. Result has 168 places, 305 transitions, 4769 flow [2024-06-21 21:32:12,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4769, PETRI_PLACES=168, PETRI_TRANSITIONS=305} [2024-06-21 21:32:12,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:32:12,128 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 305 transitions, 4769 flow [2024-06-21 21:32:12,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:12,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:12,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:12,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:32:12,129 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:12,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -668003902, now seen corresponding path program 2 times [2024-06-21 21:32:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139334541] [2024-06-21 21:32:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:15,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:15,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139334541] [2024-06-21 21:32:15,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139334541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:15,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:15,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048661556] [2024-06-21 21:32:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:15,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:15,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:15,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 305 transitions, 4769 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:15,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:15,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:15,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:17,632 INFO L124 PetriNetUnfolderBase]: 6894/10928 cut-off events. [2024-06-21 21:32:17,632 INFO L125 PetriNetUnfolderBase]: For 292641/292663 co-relation queries the response was YES. [2024-06-21 21:32:17,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65172 conditions, 10928 events. 6894/10928 cut-off events. For 292641/292663 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72150 event pairs, 2740 based on Foata normal form. 24/10950 useless extension candidates. Maximal degree in co-relation 65089. Up to 9809 conditions per place. [2024-06-21 21:32:17,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 70 changer transitions 0/345 dead transitions. [2024-06-21 21:32:17,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 345 transitions, 5607 flow [2024-06-21 21:32:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:32:17,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:32:17,712 INFO L175 Difference]: Start difference. First operand has 168 places, 305 transitions, 4769 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:32:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 345 transitions, 5607 flow [2024-06-21 21:32:18,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 345 transitions, 5458 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:18,249 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4792 flow [2024-06-21 21:32:18,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-21 21:32:18,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 21:32:18,250 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4792 flow [2024-06-21 21:32:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:18,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:18,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:18,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:32:18,251 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:18,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:18,251 INFO L85 PathProgramCache]: Analyzing trace with hash -658807132, now seen corresponding path program 3 times [2024-06-21 21:32:18,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:18,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840715170] [2024-06-21 21:32:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840715170] [2024-06-21 21:32:21,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840715170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:21,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:21,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27048187] [2024-06-21 21:32:21,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:21,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:21,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:21,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:21,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:21,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:23,813 INFO L124 PetriNetUnfolderBase]: 6874/10896 cut-off events. [2024-06-21 21:32:23,814 INFO L125 PetriNetUnfolderBase]: For 300574/300596 co-relation queries the response was YES. [2024-06-21 21:32:23,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 10896 events. 6874/10896 cut-off events. For 300574/300596 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71594 event pairs, 2681 based on Foata normal form. 24/10918 useless extension candidates. Maximal degree in co-relation 64959. Up to 8945 conditions per place. [2024-06-21 21:32:23,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 78 changer transitions 0/344 dead transitions. [2024-06-21 21:32:23,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 344 transitions, 5542 flow [2024-06-21 21:32:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:32:23,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:32:23,924 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4792 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:32:23,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 344 transitions, 5542 flow [2024-06-21 21:32:24,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 344 transitions, 5384 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:24,708 INFO L231 Difference]: Finished difference. Result has 171 places, 305 transitions, 4732 flow [2024-06-21 21:32:24,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4732, PETRI_PLACES=171, PETRI_TRANSITIONS=305} [2024-06-21 21:32:24,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 21:32:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 305 transitions, 4732 flow [2024-06-21 21:32:24,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:24,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:24,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:32:24,709 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:24,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1185846485, now seen corresponding path program 1 times [2024-06-21 21:32:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:24,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616724027] [2024-06-21 21:32:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616724027] [2024-06-21 21:32:27,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616724027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:27,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:27,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507779173] [2024-06-21 21:32:27,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:27,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:27,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:27,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 305 transitions, 4732 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:27,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:27,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:27,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:29,650 INFO L124 PetriNetUnfolderBase]: 6877/10904 cut-off events. [2024-06-21 21:32:29,651 INFO L125 PetriNetUnfolderBase]: For 309127/309131 co-relation queries the response was YES. [2024-06-21 21:32:29,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65437 conditions, 10904 events. 6877/10904 cut-off events. For 309127/309131 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 72213 event pairs, 2867 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 65352. Up to 10592 conditions per place. [2024-06-21 21:32:29,744 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 300 selfloop transitions, 29 changer transitions 0/333 dead transitions. [2024-06-21 21:32:29,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 333 transitions, 5564 flow [2024-06-21 21:32:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:32:29,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:32:29,745 INFO L175 Difference]: Start difference. First operand has 171 places, 305 transitions, 4732 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:32:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 333 transitions, 5564 flow [2024-06-21 21:32:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 333 transitions, 5394 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:30,453 INFO L231 Difference]: Finished difference. Result has 173 places, 312 transitions, 4754 flow [2024-06-21 21:32:30,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4754, PETRI_PLACES=173, PETRI_TRANSITIONS=312} [2024-06-21 21:32:30,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 21:32:30,454 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 312 transitions, 4754 flow [2024-06-21 21:32:30,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:30,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:30,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:32:30,454 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:30,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -63494155, now seen corresponding path program 2 times [2024-06-21 21:32:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952852265] [2024-06-21 21:32:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952852265] [2024-06-21 21:32:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952852265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138925949] [2024-06-21 21:32:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:33,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:33,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:33,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 312 transitions, 4754 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:33,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:33,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:33,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:35,717 INFO L124 PetriNetUnfolderBase]: 6871/10914 cut-off events. [2024-06-21 21:32:35,717 INFO L125 PetriNetUnfolderBase]: For 316681/316695 co-relation queries the response was YES. [2024-06-21 21:32:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65273 conditions, 10914 events. 6871/10914 cut-off events. For 316681/316695 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72444 event pairs, 2829 based on Foata normal form. 16/10929 useless extension candidates. Maximal degree in co-relation 65187. Up to 10561 conditions per place. [2024-06-21 21:32:35,802 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 292 selfloop transitions, 34 changer transitions 0/330 dead transitions. [2024-06-21 21:32:35,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 330 transitions, 5574 flow [2024-06-21 21:32:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:32:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:32:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:32:35,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:32:35,804 INFO L175 Difference]: Start difference. First operand has 173 places, 312 transitions, 4754 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:32:35,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 330 transitions, 5574 flow [2024-06-21 21:32:36,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 330 transitions, 5376 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:36,395 INFO L231 Difference]: Finished difference. Result has 174 places, 315 transitions, 4688 flow [2024-06-21 21:32:36,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4688, PETRI_PLACES=174, PETRI_TRANSITIONS=315} [2024-06-21 21:32:36,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 21:32:36,396 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 315 transitions, 4688 flow [2024-06-21 21:32:36,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:36,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:36,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:36,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:32:36,396 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:36,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -63506245, now seen corresponding path program 3 times [2024-06-21 21:32:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:36,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769087970] [2024-06-21 21:32:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:36,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769087970] [2024-06-21 21:32:38,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769087970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:38,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:38,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553957284] [2024-06-21 21:32:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:38,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:38,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 315 transitions, 4688 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:38,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:38,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:38,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:41,157 INFO L124 PetriNetUnfolderBase]: 6865/10900 cut-off events. [2024-06-21 21:32:41,158 INFO L125 PetriNetUnfolderBase]: For 326932/326940 co-relation queries the response was YES. [2024-06-21 21:32:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65828 conditions, 10900 events. 6865/10900 cut-off events. For 326932/326940 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72357 event pairs, 2858 based on Foata normal form. 10/10909 useless extension candidates. Maximal degree in co-relation 65741. Up to 10570 conditions per place. [2024-06-21 21:32:41,262 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 300 selfloop transitions, 31 changer transitions 0/335 dead transitions. [2024-06-21 21:32:41,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 335 transitions, 5418 flow [2024-06-21 21:32:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:32:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:32:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:32:41,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:32:41,264 INFO L175 Difference]: Start difference. First operand has 174 places, 315 transitions, 4688 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:32:41,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 335 transitions, 5418 flow [2024-06-21 21:32:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 335 transitions, 5240 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:42,037 INFO L231 Difference]: Finished difference. Result has 176 places, 315 transitions, 4588 flow [2024-06-21 21:32:42,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4588, PETRI_PLACES=176, PETRI_TRANSITIONS=315} [2024-06-21 21:32:42,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 21:32:42,038 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 315 transitions, 4588 flow [2024-06-21 21:32:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:42,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:42,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:32:42,038 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash -875787689, now seen corresponding path program 1 times [2024-06-21 21:32:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556016545] [2024-06-21 21:32:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:44,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:44,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556016545] [2024-06-21 21:32:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556016545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:44,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366698040] [2024-06-21 21:32:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:44,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:44,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:44,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 315 transitions, 4588 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:44,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:44,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:44,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:46,921 INFO L124 PetriNetUnfolderBase]: 6907/10948 cut-off events. [2024-06-21 21:32:46,921 INFO L125 PetriNetUnfolderBase]: For 348242/348244 co-relation queries the response was YES. [2024-06-21 21:32:46,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66268 conditions, 10948 events. 6907/10948 cut-off events. For 348242/348244 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 72397 event pairs, 2960 based on Foata normal form. 2/10949 useless extension candidates. Maximal degree in co-relation 66181. Up to 10563 conditions per place. [2024-06-21 21:32:47,010 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 28 changer transitions 0/353 dead transitions. [2024-06-21 21:32:47,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 353 transitions, 5674 flow [2024-06-21 21:32:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:32:47,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:32:47,014 INFO L175 Difference]: Start difference. First operand has 176 places, 315 transitions, 4588 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:32:47,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 353 transitions, 5674 flow [2024-06-21 21:32:47,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 353 transitions, 5507 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:47,663 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4684 flow [2024-06-21 21:32:47,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4684, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2024-06-21 21:32:47,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 21:32:47,664 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4684 flow [2024-06-21 21:32:47,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:47,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:47,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:47,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:32:47,665 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:47,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -561830739, now seen corresponding path program 2 times [2024-06-21 21:32:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550195337] [2024-06-21 21:32:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:49,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:49,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550195337] [2024-06-21 21:32:49,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550195337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:49,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:49,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755657501] [2024-06-21 21:32:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:49,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:49,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4684 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:49,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:49,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:49,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:52,393 INFO L124 PetriNetUnfolderBase]: 6998/11075 cut-off events. [2024-06-21 21:32:52,394 INFO L125 PetriNetUnfolderBase]: For 355435/355437 co-relation queries the response was YES. [2024-06-21 21:32:52,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68359 conditions, 11075 events. 6998/11075 cut-off events. For 355435/355437 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73365 event pairs, 3016 based on Foata normal form. 6/11080 useless extension candidates. Maximal degree in co-relation 68270. Up to 10742 conditions per place. [2024-06-21 21:32:52,516 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 25 changer transitions 0/358 dead transitions. [2024-06-21 21:32:52,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 358 transitions, 5702 flow [2024-06-21 21:32:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:32:52,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:32:52,518 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4684 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:32:52,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 358 transitions, 5702 flow [2024-06-21 21:32:53,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 358 transitions, 5589 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-21 21:32:53,343 INFO L231 Difference]: Finished difference. Result has 185 places, 337 transitions, 4835 flow [2024-06-21 21:32:53,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4835, PETRI_PLACES=185, PETRI_TRANSITIONS=337} [2024-06-21 21:32:53,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 21:32:53,344 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 337 transitions, 4835 flow [2024-06-21 21:32:53,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:53,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:53,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:32:53,345 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:53,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -875782853, now seen corresponding path program 1 times [2024-06-21 21:32:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:53,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505767668] [2024-06-21 21:32:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:55,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505767668] [2024-06-21 21:32:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505767668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:55,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163335487] [2024-06-21 21:32:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:55,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 337 transitions, 4835 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:55,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:55,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:55,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:58,214 INFO L124 PetriNetUnfolderBase]: 6972/11039 cut-off events. [2024-06-21 21:32:58,214 INFO L125 PetriNetUnfolderBase]: For 367142/367144 co-relation queries the response was YES. [2024-06-21 21:32:58,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 11039 events. 6972/11039 cut-off events. For 367142/367144 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73167 event pairs, 3021 based on Foata normal form. 6/11044 useless extension candidates. Maximal degree in co-relation 68254. Up to 10723 conditions per place. [2024-06-21 21:32:58,300 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 25 changer transitions 0/357 dead transitions. [2024-06-21 21:32:58,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 357 transitions, 5595 flow [2024-06-21 21:32:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:32:58,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:32:58,301 INFO L175 Difference]: Start difference. First operand has 185 places, 337 transitions, 4835 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:32:58,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 357 transitions, 5595 flow [2024-06-21 21:32:58,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 357 transitions, 5479 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:58,958 INFO L231 Difference]: Finished difference. Result has 189 places, 337 transitions, 4777 flow [2024-06-21 21:32:58,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4777, PETRI_PLACES=189, PETRI_TRANSITIONS=337} [2024-06-21 21:32:58,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 21:32:58,959 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 337 transitions, 4777 flow [2024-06-21 21:32:58,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:58,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:58,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:58,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:32:58,960 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:58,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 767368287, now seen corresponding path program 3 times [2024-06-21 21:32:58,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:58,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342186956] [2024-06-21 21:32:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:01,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:01,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342186956] [2024-06-21 21:33:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342186956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:01,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525160728] [2024-06-21 21:33:01,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:01,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 337 transitions, 4777 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:01,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:01,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:01,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:03,717 INFO L124 PetriNetUnfolderBase]: 6994/11071 cut-off events. [2024-06-21 21:33:03,722 INFO L125 PetriNetUnfolderBase]: For 381809/381811 co-relation queries the response was YES. [2024-06-21 21:33:03,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68719 conditions, 11071 events. 6994/11071 cut-off events. For 381809/381811 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 73091 event pairs, 2969 based on Foata normal form. 6/11076 useless extension candidates. Maximal degree in co-relation 68626. Up to 10662 conditions per place. [2024-06-21 21:33:03,847 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 38 changer transitions 0/366 dead transitions. [2024-06-21 21:33:03,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 366 transitions, 5690 flow [2024-06-21 21:33:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:33:03,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:33:03,849 INFO L175 Difference]: Start difference. First operand has 189 places, 337 transitions, 4777 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:33:03,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 366 transitions, 5690 flow [2024-06-21 21:33:04,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 366 transitions, 5598 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:04,683 INFO L231 Difference]: Finished difference. Result has 191 places, 340 transitions, 4841 flow [2024-06-21 21:33:04,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4841, PETRI_PLACES=191, PETRI_TRANSITIONS=340} [2024-06-21 21:33:04,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:33:04,684 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 340 transitions, 4841 flow [2024-06-21 21:33:04,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:04,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:04,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:04,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:33:04,685 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:04,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 767368473, now seen corresponding path program 2 times [2024-06-21 21:33:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:04,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778361783] [2024-06-21 21:33:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778361783] [2024-06-21 21:33:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778361783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:06,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275451017] [2024-06-21 21:33:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:06,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:06,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:06,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 340 transitions, 4841 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:06,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:06,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:09,628 INFO L124 PetriNetUnfolderBase]: 6992/11069 cut-off events. [2024-06-21 21:33:09,628 INFO L125 PetriNetUnfolderBase]: For 396613/396615 co-relation queries the response was YES. [2024-06-21 21:33:09,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69193 conditions, 11069 events. 6992/11069 cut-off events. For 396613/396615 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 73141 event pairs, 2966 based on Foata normal form. 6/11074 useless extension candidates. Maximal degree in co-relation 69098. Up to 10660 conditions per place. [2024-06-21 21:33:09,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 325 selfloop transitions, 40 changer transitions 0/369 dead transitions. [2024-06-21 21:33:09,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 369 transitions, 5772 flow [2024-06-21 21:33:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:33:09,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:33:09,718 INFO L175 Difference]: Start difference. First operand has 191 places, 340 transitions, 4841 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:33:09,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 369 transitions, 5772 flow [2024-06-21 21:33:10,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 369 transitions, 5676 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:10,436 INFO L231 Difference]: Finished difference. Result has 193 places, 343 transitions, 4896 flow [2024-06-21 21:33:10,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4896, PETRI_PLACES=193, PETRI_TRANSITIONS=343} [2024-06-21 21:33:10,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 21:33:10,437 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 343 transitions, 4896 flow [2024-06-21 21:33:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:10,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:10,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:33:10,438 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:10,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash 767605623, now seen corresponding path program 3 times [2024-06-21 21:33:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:10,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804867670] [2024-06-21 21:33:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804867670] [2024-06-21 21:33:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804867670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20131370] [2024-06-21 21:33:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:12,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:12,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:12,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 343 transitions, 4896 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:12,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:12,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:12,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:15,537 INFO L124 PetriNetUnfolderBase]: 6978/11050 cut-off events. [2024-06-21 21:33:15,537 INFO L125 PetriNetUnfolderBase]: For 392330/392334 co-relation queries the response was YES. [2024-06-21 21:33:15,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68991 conditions, 11050 events. 6978/11050 cut-off events. For 392330/392334 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 72934 event pairs, 2969 based on Foata normal form. 4/11053 useless extension candidates. Maximal degree in co-relation 68895. Up to 10649 conditions per place. [2024-06-21 21:33:15,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 39 changer transitions 0/363 dead transitions. [2024-06-21 21:33:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 363 transitions, 5668 flow [2024-06-21 21:33:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:33:15,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:33:15,647 INFO L175 Difference]: Start difference. First operand has 193 places, 343 transitions, 4896 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:33:15,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 363 transitions, 5668 flow [2024-06-21 21:33:16,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 363 transitions, 5581 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:16,527 INFO L231 Difference]: Finished difference. Result has 194 places, 343 transitions, 4893 flow [2024-06-21 21:33:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4893, PETRI_PLACES=194, PETRI_TRANSITIONS=343} [2024-06-21 21:33:16,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 21:33:16,528 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 343 transitions, 4893 flow [2024-06-21 21:33:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:16,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:33:16,529 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:16,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 767614551, now seen corresponding path program 1 times [2024-06-21 21:33:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:16,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280658104] [2024-06-21 21:33:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:19,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280658104] [2024-06-21 21:33:19,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280658104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:19,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:19,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333482466] [2024-06-21 21:33:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:19,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:19,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:19,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:19,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 343 transitions, 4893 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:19,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:19,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:19,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:21,999 INFO L124 PetriNetUnfolderBase]: 6973/11039 cut-off events. [2024-06-21 21:33:22,000 INFO L125 PetriNetUnfolderBase]: For 391573/391575 co-relation queries the response was YES. [2024-06-21 21:33:22,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68791 conditions, 11039 events. 6973/11039 cut-off events. For 391573/391575 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72872 event pairs, 3017 based on Foata normal form. 2/11040 useless extension candidates. Maximal degree in co-relation 68695. Up to 10775 conditions per place. [2024-06-21 21:33:22,110 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 340 selfloop transitions, 13 changer transitions 0/357 dead transitions. [2024-06-21 21:33:22,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 357 transitions, 5663 flow [2024-06-21 21:33:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 21:33:22,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:33:22,115 INFO L175 Difference]: Start difference. First operand has 194 places, 343 transitions, 4893 flow. Second operand 6 states and 92 transitions. [2024-06-21 21:33:22,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 357 transitions, 5663 flow [2024-06-21 21:33:22,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 357 transitions, 5546 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:22,919 INFO L231 Difference]: Finished difference. Result has 193 places, 345 transitions, 4843 flow [2024-06-21 21:33:22,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4843, PETRI_PLACES=193, PETRI_TRANSITIONS=345} [2024-06-21 21:33:22,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 21:33:22,919 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 345 transitions, 4843 flow [2024-06-21 21:33:22,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:22,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:22,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:22,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:33:22,920 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:22,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1704408586, now seen corresponding path program 1 times [2024-06-21 21:33:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184263044] [2024-06-21 21:33:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184263044] [2024-06-21 21:33:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184263044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062094590] [2024-06-21 21:33:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:25,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:25,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 345 transitions, 4843 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:25,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:25,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:28,943 INFO L124 PetriNetUnfolderBase]: 7133/11288 cut-off events. [2024-06-21 21:33:28,943 INFO L125 PetriNetUnfolderBase]: For 419289/419305 co-relation queries the response was YES. [2024-06-21 21:33:29,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70847 conditions, 11288 events. 7133/11288 cut-off events. For 419289/419305 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74676 event pairs, 2789 based on Foata normal form. 29/11316 useless extension candidates. Maximal degree in co-relation 70750. Up to 10597 conditions per place. [2024-06-21 21:33:29,068 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 300 selfloop transitions, 95 changer transitions 4/403 dead transitions. [2024-06-21 21:33:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 403 transitions, 6175 flow [2024-06-21 21:33:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:33:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 21:33:29,070 INFO L175 Difference]: Start difference. First operand has 193 places, 345 transitions, 4843 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:33:29,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 403 transitions, 6175 flow [2024-06-21 21:33:29,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 403 transitions, 6124 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:29,930 INFO L231 Difference]: Finished difference. Result has 202 places, 369 transitions, 5491 flow [2024-06-21 21:33:29,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5491, PETRI_PLACES=202, PETRI_TRANSITIONS=369} [2024-06-21 21:33:29,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 21:33:29,931 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 369 transitions, 5491 flow [2024-06-21 21:33:29,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:29,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:29,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:29,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:33:29,931 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:29,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1713674176, now seen corresponding path program 2 times [2024-06-21 21:33:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:29,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874931440] [2024-06-21 21:33:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:29,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:32,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874931440] [2024-06-21 21:33:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874931440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:32,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:32,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:32,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009827075] [2024-06-21 21:33:32,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:32,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:32,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:32,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 369 transitions, 5491 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:32,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:32,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:32,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:35,539 INFO L124 PetriNetUnfolderBase]: 7664/12102 cut-off events. [2024-06-21 21:33:35,539 INFO L125 PetriNetUnfolderBase]: For 474187/474195 co-relation queries the response was YES. [2024-06-21 21:33:35,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78369 conditions, 12102 events. 7664/12102 cut-off events. For 474187/474195 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 80489 event pairs, 2526 based on Foata normal form. 30/12131 useless extension candidates. Maximal degree in co-relation 78268. Up to 10098 conditions per place. [2024-06-21 21:33:35,655 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 267 selfloop transitions, 180 changer transitions 0/451 dead transitions. [2024-06-21 21:33:35,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 451 transitions, 7430 flow [2024-06-21 21:33:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:33:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:33:35,657 INFO L175 Difference]: Start difference. First operand has 202 places, 369 transitions, 5491 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:33:35,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 451 transitions, 7430 flow [2024-06-21 21:33:36,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 451 transitions, 7279 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:36,739 INFO L231 Difference]: Finished difference. Result has 209 places, 418 transitions, 6717 flow [2024-06-21 21:33:36,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6717, PETRI_PLACES=209, PETRI_TRANSITIONS=418} [2024-06-21 21:33:36,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 21:33:36,740 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 418 transitions, 6717 flow [2024-06-21 21:33:36,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:36,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:36,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:36,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:33:36,741 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:36,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash 226937380, now seen corresponding path program 3 times [2024-06-21 21:33:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:36,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089792533] [2024-06-21 21:33:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:40,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:40,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089792533] [2024-06-21 21:33:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089792533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:40,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:40,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523397565] [2024-06-21 21:33:40,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:40,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:40,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:40,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 418 transitions, 6717 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:40,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:40,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:43,333 INFO L124 PetriNetUnfolderBase]: 7704/12182 cut-off events. [2024-06-21 21:33:43,334 INFO L125 PetriNetUnfolderBase]: For 490356/490364 co-relation queries the response was YES. [2024-06-21 21:33:43,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81414 conditions, 12182 events. 7704/12182 cut-off events. For 490356/490364 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 81138 event pairs, 2713 based on Foata normal form. 30/12211 useless extension candidates. Maximal degree in co-relation 81310. Up to 10132 conditions per place. [2024-06-21 21:33:43,444 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 194 changer transitions 1/465 dead transitions. [2024-06-21 21:33:43,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 465 transitions, 8124 flow [2024-06-21 21:33:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 21:33:43,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 21:33:43,446 INFO L175 Difference]: Start difference. First operand has 209 places, 418 transitions, 6717 flow. Second operand 10 states and 166 transitions. [2024-06-21 21:33:43,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 465 transitions, 8124 flow [2024-06-21 21:33:44,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 465 transitions, 8010 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:44,449 INFO L231 Difference]: Finished difference. Result has 220 places, 436 transitions, 7536 flow [2024-06-21 21:33:44,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6609, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7536, PETRI_PLACES=220, PETRI_TRANSITIONS=436} [2024-06-21 21:33:44,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 21:33:44,450 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 436 transitions, 7536 flow [2024-06-21 21:33:44,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:44,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:44,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:33:44,450 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:44,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1987110902, now seen corresponding path program 4 times [2024-06-21 21:33:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405449514] [2024-06-21 21:33:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:47,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405449514] [2024-06-21 21:33:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405449514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:47,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254041036] [2024-06-21 21:33:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:47,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:47,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 436 transitions, 7536 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:47,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:47,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:47,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:50,618 INFO L124 PetriNetUnfolderBase]: 7700/12222 cut-off events. [2024-06-21 21:33:50,619 INFO L125 PetriNetUnfolderBase]: For 504405/504429 co-relation queries the response was YES. [2024-06-21 21:33:50,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84143 conditions, 12222 events. 7700/12222 cut-off events. For 504405/504429 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 81762 event pairs, 2629 based on Foata normal form. 40/12261 useless extension candidates. Maximal degree in co-relation 84034. Up to 9433 conditions per place. [2024-06-21 21:33:50,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 201 selfloop transitions, 279 changer transitions 3/487 dead transitions. [2024-06-21 21:33:50,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 487 transitions, 8913 flow [2024-06-21 21:33:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:33:50,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:33:50,774 INFO L175 Difference]: Start difference. First operand has 220 places, 436 transitions, 7536 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:33:50,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 487 transitions, 8913 flow [2024-06-21 21:33:52,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 487 transitions, 8549 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:52,523 INFO L231 Difference]: Finished difference. Result has 224 places, 438 transitions, 7823 flow [2024-06-21 21:33:52,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7172, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7823, PETRI_PLACES=224, PETRI_TRANSITIONS=438} [2024-06-21 21:33:52,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 21:33:52,524 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 438 transitions, 7823 flow [2024-06-21 21:33:52,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:52,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:52,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:33:52,525 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1974212732, now seen corresponding path program 5 times [2024-06-21 21:33:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563696447] [2024-06-21 21:33:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:52,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:55,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:55,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563696447] [2024-06-21 21:33:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563696447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:55,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:55,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582439913] [2024-06-21 21:33:55,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:55,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:55,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:55,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 438 transitions, 7823 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:55,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:55,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:55,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:59,085 INFO L124 PetriNetUnfolderBase]: 7900/12514 cut-off events. [2024-06-21 21:33:59,085 INFO L125 PetriNetUnfolderBase]: For 545481/545514 co-relation queries the response was YES. [2024-06-21 21:33:59,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87981 conditions, 12514 events. 7900/12514 cut-off events. For 545481/545514 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 83727 event pairs, 2055 based on Foata normal form. 26/12539 useless extension candidates. Maximal degree in co-relation 87871. Up to 9246 conditions per place. [2024-06-21 21:33:59,236 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 201 selfloop transitions, 279 changer transitions 0/484 dead transitions. [2024-06-21 21:33:59,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 484 transitions, 9421 flow [2024-06-21 21:33:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:33:59,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:33:59,237 INFO L175 Difference]: Start difference. First operand has 224 places, 438 transitions, 7823 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:33:59,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 484 transitions, 9421 flow [2024-06-21 21:34:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 484 transitions, 8978 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:00,699 INFO L231 Difference]: Finished difference. Result has 228 places, 455 transitions, 8379 flow [2024-06-21 21:34:00,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7380, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8379, PETRI_PLACES=228, PETRI_TRANSITIONS=455} [2024-06-21 21:34:00,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 21:34:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 455 transitions, 8379 flow [2024-06-21 21:34:00,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:00,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:00,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:00,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:34:00,701 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:00,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1968692352, now seen corresponding path program 6 times [2024-06-21 21:34:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540701294] [2024-06-21 21:34:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540701294] [2024-06-21 21:34:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540701294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:03,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:03,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:03,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185317647] [2024-06-21 21:34:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:03,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:03,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:03,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:03,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 455 transitions, 8379 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:03,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:03,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:03,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:07,200 INFO L124 PetriNetUnfolderBase]: 7888/12490 cut-off events. [2024-06-21 21:34:07,201 INFO L125 PetriNetUnfolderBase]: For 572782/572790 co-relation queries the response was YES. [2024-06-21 21:34:07,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91243 conditions, 12490 events. 7888/12490 cut-off events. For 572782/572790 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 83639 event pairs, 2636 based on Foata normal form. 14/12503 useless extension candidates. Maximal degree in co-relation 91130. Up to 9730 conditions per place. [2024-06-21 21:34:07,379 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 229 selfloop transitions, 252 changer transitions 0/485 dead transitions. [2024-06-21 21:34:07,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 485 transitions, 9511 flow [2024-06-21 21:34:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:34:07,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:34:07,381 INFO L175 Difference]: Start difference. First operand has 228 places, 455 transitions, 8379 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:34:07,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 485 transitions, 9511 flow [2024-06-21 21:34:09,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 485 transitions, 9188 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:09,317 INFO L231 Difference]: Finished difference. Result has 232 places, 455 transitions, 8588 flow [2024-06-21 21:34:09,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8056, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8588, PETRI_PLACES=232, PETRI_TRANSITIONS=455} [2024-06-21 21:34:09,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 21:34:09,318 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 455 transitions, 8588 flow [2024-06-21 21:34:09,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:09,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:09,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:34:09,319 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:09,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1752229390, now seen corresponding path program 1 times [2024-06-21 21:34:09,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:09,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447674641] [2024-06-21 21:34:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:11,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447674641] [2024-06-21 21:34:11,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447674641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:11,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:11,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153745596] [2024-06-21 21:34:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:11,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:11,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:11,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 455 transitions, 8588 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:11,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:11,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:11,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:15,381 INFO L124 PetriNetUnfolderBase]: 7876/12464 cut-off events. [2024-06-21 21:34:15,381 INFO L125 PetriNetUnfolderBase]: For 591906/591908 co-relation queries the response was YES. [2024-06-21 21:34:15,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91733 conditions, 12464 events. 7876/12464 cut-off events. For 591906/591908 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 83429 event pairs, 3162 based on Foata normal form. 4/12467 useless extension candidates. Maximal degree in co-relation 91620. Up to 11901 conditions per place. [2024-06-21 21:34:15,519 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 44 changer transitions 0/483 dead transitions. [2024-06-21 21:34:15,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 483 transitions, 9622 flow [2024-06-21 21:34:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:34:15,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:34:15,521 INFO L175 Difference]: Start difference. First operand has 232 places, 455 transitions, 8588 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:34:15,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 483 transitions, 9622 flow [2024-06-21 21:34:16,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 483 transitions, 8823 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:16,862 INFO L231 Difference]: Finished difference. Result has 231 places, 455 transitions, 7883 flow [2024-06-21 21:34:16,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7883, PETRI_PLACES=231, PETRI_TRANSITIONS=455} [2024-06-21 21:34:16,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 21:34:16,863 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 455 transitions, 7883 flow [2024-06-21 21:34:16,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:16,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:16,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:34:16,864 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:16,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1732013436, now seen corresponding path program 1 times [2024-06-21 21:34:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801163044] [2024-06-21 21:34:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:19,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801163044] [2024-06-21 21:34:19,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801163044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:19,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:19,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042318825] [2024-06-21 21:34:19,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:19,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:19,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 455 transitions, 7883 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:19,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:19,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:19,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:23,356 INFO L124 PetriNetUnfolderBase]: 8056/12689 cut-off events. [2024-06-21 21:34:23,357 INFO L125 PetriNetUnfolderBase]: For 565926/565930 co-relation queries the response was YES. [2024-06-21 21:34:23,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91181 conditions, 12689 events. 8056/12689 cut-off events. For 565926/565930 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 84502 event pairs, 2590 based on Foata normal form. 6/12694 useless extension candidates. Maximal degree in co-relation 91067. Up to 9742 conditions per place. [2024-06-21 21:34:23,516 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 281 changer transitions 0/513 dead transitions. [2024-06-21 21:34:23,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 513 transitions, 9483 flow [2024-06-21 21:34:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:34:23,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:34:23,525 INFO L175 Difference]: Start difference. First operand has 231 places, 455 transitions, 7883 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:34:23,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 513 transitions, 9483 flow [2024-06-21 21:34:25,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 513 transitions, 9324 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:25,340 INFO L231 Difference]: Finished difference. Result has 233 places, 466 transitions, 8554 flow [2024-06-21 21:34:25,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7728, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8554, PETRI_PLACES=233, PETRI_TRANSITIONS=466} [2024-06-21 21:34:25,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 21:34:25,341 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 466 transitions, 8554 flow [2024-06-21 21:34:25,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:25,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:25,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:25,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:34:25,341 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:25,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1731893280, now seen corresponding path program 1 times [2024-06-21 21:34:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:25,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145626920] [2024-06-21 21:34:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145626920] [2024-06-21 21:34:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145626920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84800440] [2024-06-21 21:34:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:28,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:28,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 466 transitions, 8554 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:28,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:28,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:31,363 INFO L124 PetriNetUnfolderBase]: 8394/13132 cut-off events. [2024-06-21 21:34:31,364 INFO L125 PetriNetUnfolderBase]: For 629738/629742 co-relation queries the response was YES. [2024-06-21 21:34:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99179 conditions, 13132 events. 8394/13132 cut-off events. For 629738/629742 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 87033 event pairs, 2967 based on Foata normal form. 50/13181 useless extension candidates. Maximal degree in co-relation 99065. Up to 12099 conditions per place. [2024-06-21 21:34:31,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 383 selfloop transitions, 143 changer transitions 8/538 dead transitions. [2024-06-21 21:34:31,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 538 transitions, 10648 flow [2024-06-21 21:34:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:34:31,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:34:31,552 INFO L175 Difference]: Start difference. First operand has 233 places, 466 transitions, 8554 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:34:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 538 transitions, 10648 flow [2024-06-21 21:34:33,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 538 transitions, 10311 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:33,373 INFO L231 Difference]: Finished difference. Result has 239 places, 502 transitions, 9444 flow [2024-06-21 21:34:33,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8253, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9444, PETRI_PLACES=239, PETRI_TRANSITIONS=502} [2024-06-21 21:34:33,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 21:34:33,374 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 502 transitions, 9444 flow [2024-06-21 21:34:33,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:33,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:33,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:34:33,375 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:33,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1584297146, now seen corresponding path program 2 times [2024-06-21 21:34:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341955720] [2024-06-21 21:34:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:36,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341955720] [2024-06-21 21:34:36,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341955720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:36,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:36,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:36,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740940509] [2024-06-21 21:34:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:36,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:36,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:36,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:36,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 502 transitions, 9444 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:36,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:36,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:36,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:40,130 INFO L124 PetriNetUnfolderBase]: 8262/13042 cut-off events. [2024-06-21 21:34:40,131 INFO L125 PetriNetUnfolderBase]: For 605884/605896 co-relation queries the response was YES. [2024-06-21 21:34:40,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97769 conditions, 13042 events. 8262/13042 cut-off events. For 605884/605896 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 87224 event pairs, 2749 based on Foata normal form. 22/13063 useless extension candidates. Maximal degree in co-relation 97651. Up to 10778 conditions per place. [2024-06-21 21:34:40,294 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 228 changer transitions 3/540 dead transitions. [2024-06-21 21:34:40,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 540 transitions, 10960 flow [2024-06-21 21:34:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:34:40,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:34:40,309 INFO L175 Difference]: Start difference. First operand has 239 places, 502 transitions, 9444 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:34:40,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 540 transitions, 10960 flow [2024-06-21 21:34:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 540 transitions, 10759 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:42,558 INFO L231 Difference]: Finished difference. Result has 244 places, 511 transitions, 9949 flow [2024-06-21 21:34:42,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9243, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9949, PETRI_PLACES=244, PETRI_TRANSITIONS=511} [2024-06-21 21:34:42,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 21:34:42,559 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 511 transitions, 9949 flow [2024-06-21 21:34:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:42,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:42,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:34:42,565 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:42,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -292279204, now seen corresponding path program 3 times [2024-06-21 21:34:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865106683] [2024-06-21 21:34:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:45,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865106683] [2024-06-21 21:34:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865106683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:45,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:45,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453614638] [2024-06-21 21:34:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:45,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:45,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:45,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:45,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 511 transitions, 9949 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:45,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:45,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:45,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:49,253 INFO L124 PetriNetUnfolderBase]: 8054/12732 cut-off events. [2024-06-21 21:34:49,253 INFO L125 PetriNetUnfolderBase]: For 616599/616611 co-relation queries the response was YES. [2024-06-21 21:34:49,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94740 conditions, 12732 events. 8054/12732 cut-off events. For 616599/616611 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 84994 event pairs, 2857 based on Foata normal form. 46/12777 useless extension candidates. Maximal degree in co-relation 94621. Up to 10667 conditions per place. [2024-06-21 21:34:49,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 228 changer transitions 8/539 dead transitions. [2024-06-21 21:34:49,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 539 transitions, 11183 flow [2024-06-21 21:34:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:34:49,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:34:49,401 INFO L175 Difference]: Start difference. First operand has 244 places, 511 transitions, 9949 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:34:49,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 539 transitions, 11183 flow [2024-06-21 21:34:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 539 transitions, 10814 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:51,437 INFO L231 Difference]: Finished difference. Result has 248 places, 503 transitions, 9866 flow [2024-06-21 21:34:51,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9580, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9866, PETRI_PLACES=248, PETRI_TRANSITIONS=503} [2024-06-21 21:34:51,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:34:51,438 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 503 transitions, 9866 flow [2024-06-21 21:34:51,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:51,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:51,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:51,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:34:51,439 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1584306074, now seen corresponding path program 1 times [2024-06-21 21:34:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221661749] [2024-06-21 21:34:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221661749] [2024-06-21 21:34:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221661749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:55,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215645824] [2024-06-21 21:34:55,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:55,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:55,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 503 transitions, 9866 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:55,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:55,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:58,593 INFO L124 PetriNetUnfolderBase]: 7894/12531 cut-off events. [2024-06-21 21:34:58,594 INFO L125 PetriNetUnfolderBase]: For 600973/600983 co-relation queries the response was YES. [2024-06-21 21:34:58,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93292 conditions, 12531 events. 7894/12531 cut-off events. For 600973/600983 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 84072 event pairs, 3021 based on Foata normal form. 12/12542 useless extension candidates. Maximal degree in co-relation 93172. Up to 12057 conditions per place. [2024-06-21 21:34:58,771 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 491 selfloop transitions, 33 changer transitions 0/528 dead transitions. [2024-06-21 21:34:58,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 528 transitions, 11042 flow [2024-06-21 21:34:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:34:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:34:58,781 INFO L175 Difference]: Start difference. First operand has 248 places, 503 transitions, 9866 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:34:58,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 528 transitions, 11042 flow [2024-06-21 21:35:01,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 528 transitions, 10761 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:01,157 INFO L231 Difference]: Finished difference. Result has 251 places, 505 transitions, 9716 flow [2024-06-21 21:35:01,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9716, PETRI_PLACES=251, PETRI_TRANSITIONS=505} [2024-06-21 21:35:01,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 21:35:01,158 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 505 transitions, 9716 flow [2024-06-21 21:35:01,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:01,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:01,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:01,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:35:01,159 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:01,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 59408350, now seen corresponding path program 2 times [2024-06-21 21:35:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744691718] [2024-06-21 21:35:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:04,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744691718] [2024-06-21 21:35:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744691718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:04,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:04,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511174903] [2024-06-21 21:35:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:04,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:04,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:04,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:04,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 505 transitions, 9716 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:04,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:04,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:04,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:07,705 INFO L124 PetriNetUnfolderBase]: 7968/12505 cut-off events. [2024-06-21 21:35:07,706 INFO L125 PetriNetUnfolderBase]: For 640876/640882 co-relation queries the response was YES. [2024-06-21 21:35:07,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93716 conditions, 12505 events. 7968/12505 cut-off events. For 640876/640882 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82405 event pairs, 2224 based on Foata normal form. 3/12507 useless extension candidates. Maximal degree in co-relation 93596. Up to 9072 conditions per place. [2024-06-21 21:35:07,864 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 208 selfloop transitions, 358 changer transitions 0/570 dead transitions. [2024-06-21 21:35:07,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 570 transitions, 11912 flow [2024-06-21 21:35:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:35:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:35:07,866 INFO L175 Difference]: Start difference. First operand has 251 places, 505 transitions, 9716 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:35:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 570 transitions, 11912 flow [2024-06-21 21:35:09,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 570 transitions, 11805 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:09,758 INFO L231 Difference]: Finished difference. Result has 255 places, 531 transitions, 11117 flow [2024-06-21 21:35:09,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9609, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11117, PETRI_PLACES=255, PETRI_TRANSITIONS=531} [2024-06-21 21:35:09,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 21:35:09,758 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 531 transitions, 11117 flow [2024-06-21 21:35:09,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:09,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:09,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:09,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:35:09,759 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:09,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1131285770, now seen corresponding path program 3 times [2024-06-21 21:35:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:09,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258743867] [2024-06-21 21:35:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258743867] [2024-06-21 21:35:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258743867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:12,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:12,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024800297] [2024-06-21 21:35:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:12,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:12,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 531 transitions, 11117 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:12,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:12,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:12,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:16,158 INFO L124 PetriNetUnfolderBase]: 7962/12495 cut-off events. [2024-06-21 21:35:16,159 INFO L125 PetriNetUnfolderBase]: For 690355/690361 co-relation queries the response was YES. [2024-06-21 21:35:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99132 conditions, 12495 events. 7962/12495 cut-off events. For 690355/690361 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82409 event pairs, 2237 based on Foata normal form. 3/12497 useless extension candidates. Maximal degree in co-relation 99009. Up to 9071 conditions per place. [2024-06-21 21:35:16,301 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 364 changer transitions 0/567 dead transitions. [2024-06-21 21:35:16,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 567 transitions, 12814 flow [2024-06-21 21:35:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:35:16,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:35:16,304 INFO L175 Difference]: Start difference. First operand has 255 places, 531 transitions, 11117 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:35:16,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 567 transitions, 12814 flow [2024-06-21 21:35:18,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 567 transitions, 12646 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-21 21:35:18,181 INFO L231 Difference]: Finished difference. Result has 262 places, 533 transitions, 11766 flow [2024-06-21 21:35:18,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10971, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11766, PETRI_PLACES=262, PETRI_TRANSITIONS=533} [2024-06-21 21:35:18,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 21:35:18,182 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 533 transitions, 11766 flow [2024-06-21 21:35:18,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:18,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:18,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:35:18,183 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:18,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash -168492800, now seen corresponding path program 4 times [2024-06-21 21:35:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988993257] [2024-06-21 21:35:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:21,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988993257] [2024-06-21 21:35:21,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988993257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:21,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:21,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:21,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874551041] [2024-06-21 21:35:21,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:21,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:21,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:21,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:21,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 533 transitions, 11766 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:21,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:21,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:21,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:25,225 INFO L124 PetriNetUnfolderBase]: 7956/12530 cut-off events. [2024-06-21 21:35:25,225 INFO L125 PetriNetUnfolderBase]: For 714450/714456 co-relation queries the response was YES. [2024-06-21 21:35:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101395 conditions, 12530 events. 7956/12530 cut-off events. For 714450/714456 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 83071 event pairs, 2889 based on Foata normal form. 3/12532 useless extension candidates. Maximal degree in co-relation 101269. Up to 11616 conditions per place. [2024-06-21 21:35:25,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 146 changer transitions 0/566 dead transitions. [2024-06-21 21:35:25,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 566 transitions, 13125 flow [2024-06-21 21:35:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:35:25,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:35:25,393 INFO L175 Difference]: Start difference. First operand has 262 places, 533 transitions, 11766 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:35:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 566 transitions, 13125 flow [2024-06-21 21:35:27,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 566 transitions, 12574 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:27,646 INFO L231 Difference]: Finished difference. Result has 269 places, 534 transitions, 11576 flow [2024-06-21 21:35:27,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11216, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11576, PETRI_PLACES=269, PETRI_TRANSITIONS=534} [2024-06-21 21:35:27,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 21:35:27,646 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 534 transitions, 11576 flow [2024-06-21 21:35:27,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:27,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:27,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:27,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:35:27,647 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:27,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash -168372644, now seen corresponding path program 4 times [2024-06-21 21:35:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:27,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495306721] [2024-06-21 21:35:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:27,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:30,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:30,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495306721] [2024-06-21 21:35:30,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495306721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:30,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:30,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:30,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894541211] [2024-06-21 21:35:30,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:30,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:30,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:30,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 534 transitions, 11576 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:30,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:30,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:30,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:34,096 INFO L124 PetriNetUnfolderBase]: 7848/12415 cut-off events. [2024-06-21 21:35:34,096 INFO L125 PetriNetUnfolderBase]: For 719088/719094 co-relation queries the response was YES. [2024-06-21 21:35:34,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97979 conditions, 12415 events. 7848/12415 cut-off events. For 719088/719094 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82590 event pairs, 2932 based on Foata normal form. 13/12427 useless extension candidates. Maximal degree in co-relation 97851. Up to 11627 conditions per place. [2024-06-21 21:35:34,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 125 changer transitions 9/560 dead transitions. [2024-06-21 21:35:34,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 560 transitions, 12764 flow [2024-06-21 21:35:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:35:34,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:35:34,497 INFO L175 Difference]: Start difference. First operand has 269 places, 534 transitions, 11576 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:35:34,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 560 transitions, 12764 flow [2024-06-21 21:35:36,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 560 transitions, 12439 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:36,757 INFO L231 Difference]: Finished difference. Result has 271 places, 526 transitions, 11296 flow [2024-06-21 21:35:36,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11251, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11296, PETRI_PLACES=271, PETRI_TRANSITIONS=526} [2024-06-21 21:35:36,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 21:35:36,761 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 526 transitions, 11296 flow [2024-06-21 21:35:36,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:36,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:36,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:35:36,762 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:36,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1246755686, now seen corresponding path program 5 times [2024-06-21 21:35:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172362162] [2024-06-21 21:35:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:39,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172362162] [2024-06-21 21:35:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172362162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:39,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:39,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356239915] [2024-06-21 21:35:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:39,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:39,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:39,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:39,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 526 transitions, 11296 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:39,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:39,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:39,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:43,544 INFO L124 PetriNetUnfolderBase]: 7925/12432 cut-off events. [2024-06-21 21:35:43,544 INFO L125 PetriNetUnfolderBase]: For 765128/765134 co-relation queries the response was YES. [2024-06-21 21:35:43,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99474 conditions, 12432 events. 7925/12432 cut-off events. For 765128/765134 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 81863 event pairs, 2786 based on Foata normal form. 7/12438 useless extension candidates. Maximal degree in co-relation 99345. Up to 11321 conditions per place. [2024-06-21 21:35:43,708 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 388 selfloop transitions, 185 changer transitions 0/577 dead transitions. [2024-06-21 21:35:43,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 577 transitions, 13260 flow [2024-06-21 21:35:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:35:43,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:35:43,710 INFO L175 Difference]: Start difference. First operand has 271 places, 526 transitions, 11296 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:35:43,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 577 transitions, 13260 flow [2024-06-21 21:35:45,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 577 transitions, 12967 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:45,664 INFO L231 Difference]: Finished difference. Result has 276 places, 551 transitions, 12053 flow [2024-06-21 21:35:45,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11011, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12053, PETRI_PLACES=276, PETRI_TRANSITIONS=551} [2024-06-21 21:35:45,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:35:45,665 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 551 transitions, 12053 flow [2024-06-21 21:35:45,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:45,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:45,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:45,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:35:45,666 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:45,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1483006370, now seen corresponding path program 5 times [2024-06-21 21:35:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:45,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326646798] [2024-06-21 21:35:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:48,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:48,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326646798] [2024-06-21 21:35:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326646798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:48,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:48,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377265816] [2024-06-21 21:35:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:48,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:48,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 551 transitions, 12053 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:48,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:48,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:48,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:52,492 INFO L124 PetriNetUnfolderBase]: 7907/12430 cut-off events. [2024-06-21 21:35:52,493 INFO L125 PetriNetUnfolderBase]: For 782636/782642 co-relation queries the response was YES. [2024-06-21 21:35:52,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100532 conditions, 12430 events. 7907/12430 cut-off events. For 782636/782642 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 81918 event pairs, 2795 based on Foata normal form. 7/12436 useless extension candidates. Maximal degree in co-relation 100401. Up to 11310 conditions per place. [2024-06-21 21:35:52,653 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 388 selfloop transitions, 185 changer transitions 0/577 dead transitions. [2024-06-21 21:35:52,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 577 transitions, 13481 flow [2024-06-21 21:35:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:35:52,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:35:52,655 INFO L175 Difference]: Start difference. First operand has 276 places, 551 transitions, 12053 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:35:52,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 577 transitions, 13481 flow [2024-06-21 21:35:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 577 transitions, 13243 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:55,063 INFO L231 Difference]: Finished difference. Result has 282 places, 551 transitions, 12192 flow [2024-06-21 21:35:55,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11815, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12192, PETRI_PLACES=282, PETRI_TRANSITIONS=551} [2024-06-21 21:35:55,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:35:55,064 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 551 transitions, 12192 flow [2024-06-21 21:35:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:55,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:55,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:55,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:35:55,065 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:55,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash -574250426, now seen corresponding path program 6 times [2024-06-21 21:35:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:55,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040565580] [2024-06-21 21:35:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:55,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040565580] [2024-06-21 21:35:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040565580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:57,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:57,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231033179] [2024-06-21 21:35:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:57,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:57,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:57,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 551 transitions, 12192 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:57,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:57,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:57,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:01,585 INFO L124 PetriNetUnfolderBase]: 7881/12455 cut-off events. [2024-06-21 21:36:01,586 INFO L125 PetriNetUnfolderBase]: For 793863/793869 co-relation queries the response was YES. [2024-06-21 21:36:01,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100431 conditions, 12455 events. 7881/12455 cut-off events. For 793863/793869 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 82708 event pairs, 2941 based on Foata normal form. 7/12461 useless extension candidates. Maximal degree in co-relation 100299. Up to 11719 conditions per place. [2024-06-21 21:36:01,984 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 441 selfloop transitions, 125 changer transitions 3/573 dead transitions. [2024-06-21 21:36:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 573 transitions, 13392 flow [2024-06-21 21:36:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:36:01,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:36:01,986 INFO L175 Difference]: Start difference. First operand has 282 places, 551 transitions, 12192 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:36:01,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 573 transitions, 13392 flow [2024-06-21 21:36:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 573 transitions, 12964 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:36:04,477 INFO L231 Difference]: Finished difference. Result has 284 places, 549 transitions, 11972 flow [2024-06-21 21:36:04,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11764, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11972, PETRI_PLACES=284, PETRI_TRANSITIONS=549} [2024-06-21 21:36:04,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:36:04,479 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 549 transitions, 11972 flow [2024-06-21 21:36:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:04,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:04,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:36:04,479 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:04,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -386047160, now seen corresponding path program 7 times [2024-06-21 21:36:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:04,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753192013] [2024-06-21 21:36:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753192013] [2024-06-21 21:36:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753192013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:07,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642668403] [2024-06-21 21:36:07,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:07,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:07,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 549 transitions, 11972 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:07,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:07,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:07,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:11,849 INFO L124 PetriNetUnfolderBase]: 7815/12359 cut-off events. [2024-06-21 21:36:11,849 INFO L125 PetriNetUnfolderBase]: For 806886/806892 co-relation queries the response was YES. [2024-06-21 21:36:11,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99226 conditions, 12359 events. 7815/12359 cut-off events. For 806886/806892 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 82153 event pairs, 2911 based on Foata normal form. 7/12365 useless extension candidates. Maximal degree in co-relation 99093. Up to 11503 conditions per place. [2024-06-21 21:36:11,986 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 144 changer transitions 3/578 dead transitions. [2024-06-21 21:36:11,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 578 transitions, 13208 flow [2024-06-21 21:36:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:36:11,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:36:11,987 INFO L175 Difference]: Start difference. First operand has 284 places, 549 transitions, 11972 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:36:11,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 578 transitions, 13208 flow [2024-06-21 21:36:14,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 578 transitions, 12913 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:14,182 INFO L231 Difference]: Finished difference. Result has 286 places, 547 transitions, 11940 flow [2024-06-21 21:36:14,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11677, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11940, PETRI_PLACES=286, PETRI_TRANSITIONS=547} [2024-06-21 21:36:14,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 21:36:14,190 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 547 transitions, 11940 flow [2024-06-21 21:36:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:14,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:14,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:14,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:36:14,190 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:14,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1293413282, now seen corresponding path program 6 times [2024-06-21 21:36:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:14,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854840030] [2024-06-21 21:36:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:14,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:17,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:17,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854840030] [2024-06-21 21:36:17,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854840030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:17,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:17,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:17,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81246575] [2024-06-21 21:36:17,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:17,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:17,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 547 transitions, 11940 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:17,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:17,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:20,980 INFO L124 PetriNetUnfolderBase]: 7729/12199 cut-off events. [2024-06-21 21:36:20,980 INFO L125 PetriNetUnfolderBase]: For 824700/824706 co-relation queries the response was YES. [2024-06-21 21:36:21,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98614 conditions, 12199 events. 7729/12199 cut-off events. For 824700/824706 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 80596 event pairs, 1978 based on Foata normal form. 7/12205 useless extension candidates. Maximal degree in co-relation 98480. Up to 9190 conditions per place. [2024-06-21 21:36:21,318 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 195 selfloop transitions, 391 changer transitions 0/590 dead transitions. [2024-06-21 21:36:21,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 590 transitions, 13616 flow [2024-06-21 21:36:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:36:21,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:36:21,320 INFO L175 Difference]: Start difference. First operand has 286 places, 547 transitions, 11940 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:36:21,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 590 transitions, 13616 flow [2024-06-21 21:36:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 590 transitions, 13254 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 21:36:23,592 INFO L231 Difference]: Finished difference. Result has 288 places, 548 transitions, 12555 flow [2024-06-21 21:36:23,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11590, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12555, PETRI_PLACES=288, PETRI_TRANSITIONS=548} [2024-06-21 21:36:23,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:36:23,594 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 548 transitions, 12555 flow [2024-06-21 21:36:23,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:23,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:36:23,595 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:23,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1065333386, now seen corresponding path program 8 times [2024-06-21 21:36:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:23,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709575358] [2024-06-21 21:36:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:26,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709575358] [2024-06-21 21:36:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709575358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:26,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:26,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460114808] [2024-06-21 21:36:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:26,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 548 transitions, 12555 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:26,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:26,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:26,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:30,191 INFO L124 PetriNetUnfolderBase]: 7787/12335 cut-off events. [2024-06-21 21:36:30,192 INFO L125 PetriNetUnfolderBase]: For 822752/822785 co-relation queries the response was YES. [2024-06-21 21:36:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101753 conditions, 12335 events. 7787/12335 cut-off events. For 822752/822785 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 81923 event pairs, 2095 based on Foata normal form. 20/12354 useless extension candidates. Maximal degree in co-relation 101619. Up to 9207 conditions per place. [2024-06-21 21:36:30,436 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 342 changer transitions 0/583 dead transitions. [2024-06-21 21:36:30,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 583 transitions, 14341 flow [2024-06-21 21:36:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:36:30,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:36:30,439 INFO L175 Difference]: Start difference. First operand has 288 places, 548 transitions, 12555 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:36:30,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 583 transitions, 14341 flow