./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:59:41,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:59:41,595 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:59:41,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:59:41,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:59:41,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:59:41,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:59:41,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:59:41,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:59:41,616 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:59:41,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:59:41,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:59:41,617 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:59:41,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:59:41,617 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:59:41,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:59:41,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:59:41,618 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:59:41,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:59:41,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:59:41,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:59:41,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:59:41,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:59:41,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:59:41,620 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:59:41,620 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:59:41,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:59:41,621 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:59:41,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:59:41,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:59:41,621 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:59:41,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:59:41,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:59:41,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:59:41,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:59:41,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:59:41,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:59:41,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:59:41,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:59:41,623 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:59:41,624 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:59:41,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:59:41,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:59:41,624 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:59:41,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:59:41,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:59:41,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:59:41,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:59:41,841 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:59:41,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-28 01:59:42,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:59:43,038 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:59:43,039 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-28 01:59:43,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f1136c/b51fe416cb3b450f98d25777250b4f0e/FLAG36d87594b [2024-06-28 01:59:43,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f1136c/b51fe416cb3b450f98d25777250b4f0e [2024-06-28 01:59:43,065 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:59:43,065 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:59:43,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_power.oepc.yml/witness.yml [2024-06-28 01:59:43,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:59:43,261 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:59:43,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:59:43,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:59:43,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:59:43,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:59:43" (1/2) ... [2024-06-28 01:59:43,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1846a8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:43, skipping insertion in model container [2024-06-28 01:59:43,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:59:43" (1/2) ... [2024-06-28 01:59:43,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64606f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:43, skipping insertion in model container [2024-06-28 01:59:43,269 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:43" (2/2) ... [2024-06-28 01:59:43,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1846a8e2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43, skipping insertion in model container [2024-06-28 01:59:43,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:43" (2/2) ... [2024-06-28 01:59:43,269 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:59:43,398 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:59:43,399 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:43,399 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:43,400 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:43,400 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:59:43,400 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-28 01:59:43,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:59:43,557 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i[995,1008] [2024-06-28 01:59:43,704 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:59:43,711 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:59:43,745 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:59:43,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:59:43,863 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:59:43,864 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43 WrapperNode [2024-06-28 01:59:43,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:59:43,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:59:43,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:59:43,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:59:43,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:43,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:43,946 INFO L138 Inliner]: procedures = 175, calls = 81, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 206 [2024-06-28 01:59:43,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:59:43,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:59:43,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:59:43,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:59:43,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:43,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:43,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:43,995 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-28 01:59:44,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,018 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,038 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:59:44,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:59:44,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:59:44,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:59:44,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (1/1) ... [2024-06-28 01:59:44,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:59:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:59:44,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:59:44,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:59:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:59:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:59:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:59:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:59:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:59:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:59:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:59:44,113 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:59:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:59:44,113 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:59:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:59:44,113 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:59:44,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:59:44,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:59:44,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:59:44,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:59:44,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:59:44,116 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:59:44,271 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:59:44,273 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:59:44,735 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:59:44,736 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:59:45,059 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:59:45,059 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:59:45,059 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:59:45 BoogieIcfgContainer [2024-06-28 01:59:45,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:59:45,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:59:45,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:59:45,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:59:45,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:59:43" (1/4) ... [2024-06-28 01:59:45,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b3a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:59:45, skipping insertion in model container [2024-06-28 01:59:45,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:43" (2/4) ... [2024-06-28 01:59:45,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b3a15f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:59:45, skipping insertion in model container [2024-06-28 01:59:45,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:43" (3/4) ... [2024-06-28 01:59:45,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b3a15f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:59:45, skipping insertion in model container [2024-06-28 01:59:45,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:59:45" (4/4) ... [2024-06-28 01:59:45,068 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_power.oepc.i [2024-06-28 01:59:45,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:59:45,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:59:45,083 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:59:45,136 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:59:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:59:45,197 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-28 01:59:45,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:59:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-28 01:59:45,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:59:45,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-28 01:59:45,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:59:45,237 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;@352567a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:59:45,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:59:45,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:59:45,244 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 01:59:45,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:59:45,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:45,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:59:45,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:45,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 711668431, now seen corresponding path program 1 times [2024-06-28 01:59:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:45,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557462221] [2024-06-28 01:59:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:59:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:59:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:59:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557462221] [2024-06-28 01:59:46,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557462221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:59:46,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:59:46,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:59:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323335633] [2024-06-28 01:59:46,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:59:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:59:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:59:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:59:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:59:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-28 01:59:47,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:47,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:59:47,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-28 01:59:47,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:59:47,784 INFO L124 PetriNetUnfolderBase]: 2180/3473 cut-off events. [2024-06-28 01:59:47,784 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 01:59:47,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3473 events. 2180/3473 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19881 event pairs, 1317 based on Foata normal form. 0/3341 useless extension candidates. Maximal degree in co-relation 6714. Up to 3184 conditions per place. [2024-06-28 01:59:47,803 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-28 01:59:47,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-28 01:59:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:59:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:59:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-28 01:59:47,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 01:59:47,813 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-28 01:59:47,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-28 01:59:47,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:59:47,818 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-28 01:59:47,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-28 01:59:47,821 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-28 01:59:47,822 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-28 01:59:47,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:47,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:47,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:59:47,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:59:47,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:47,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1013590094, now seen corresponding path program 1 times [2024-06-28 01:59:47,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:47,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983854895] [2024-06-28 01:59:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:59:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:59:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:59:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983854895] [2024-06-28 01:59:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983854895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:59:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:59:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:59:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79438560] [2024-06-28 01:59:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:59:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:59:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:59:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:59:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:59:49,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-28 01:59:49,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:49,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:59:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-28 01:59:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:59:50,623 INFO L124 PetriNetUnfolderBase]: 2174/3323 cut-off events. [2024-06-28 01:59:50,623 INFO L125 PetriNetUnfolderBase]: For 604/612 co-relation queries the response was YES. [2024-06-28 01:59:50,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 3323 events. 2174/3323 cut-off events. For 604/612 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18341 event pairs, 893 based on Foata normal form. 6/3324 useless extension candidates. Maximal degree in co-relation 7430. Up to 3142 conditions per place. [2024-06-28 01:59:50,637 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-28 01:59:50,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-28 01:59:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:59:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:59:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 01:59:50,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-28 01:59:50,639 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-28 01:59:50,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-28 01:59:50,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:59:50,641 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-28 01:59:50,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 01:59:50,642 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-28 01:59:50,642 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-28 01:59:50,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:50,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:50,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:59:50,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:59:50,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:50,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2051638344, now seen corresponding path program 1 times [2024-06-28 01:59:50,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:50,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450109381] [2024-06-28 01:59:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:59:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:59:53,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:59:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450109381] [2024-06-28 01:59:53,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450109381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:59:53,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:59:53,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:59:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805103867] [2024-06-28 01:59:53,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:59:53,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:59:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:59:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:59:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:59:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-28 01:59:53,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:53,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:59:53,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-28 01:59:53,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:59:54,344 INFO L124 PetriNetUnfolderBase]: 2769/4162 cut-off events. [2024-06-28 01:59:54,344 INFO L125 PetriNetUnfolderBase]: For 2308/2332 co-relation queries the response was YES. [2024-06-28 01:59:54,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 4162 events. 2769/4162 cut-off events. For 2308/2332 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22612 event pairs, 709 based on Foata normal form. 15/4170 useless extension candidates. Maximal degree in co-relation 10420. Up to 3890 conditions per place. [2024-06-28 01:59:54,362 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-28 01:59:54,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-28 01:59:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:59:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:59:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:59:54,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 01:59:54,364 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:59:54,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-28 01:59:54,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 01:59:54,368 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-28 01:59:54,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-28 01:59:54,368 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-28 01:59:54,369 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-28 01:59:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:54,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:59:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:59:54,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:54,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1185474691, now seen corresponding path program 1 times [2024-06-28 01:59:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:54,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385252389] [2024-06-28 01:59:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:59:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:59:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:59:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385252389] [2024-06-28 01:59:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385252389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:59:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:59:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:59:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243714733] [2024-06-28 01:59:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:59:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:59:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:59:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:59:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:59:55,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:59:55,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:55,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:59:55,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:59:55,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:59:56,912 INFO L124 PetriNetUnfolderBase]: 3310/5149 cut-off events. [2024-06-28 01:59:56,912 INFO L125 PetriNetUnfolderBase]: For 4482/4482 co-relation queries the response was YES. [2024-06-28 01:59:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 5149 events. 3310/5149 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29323 event pairs, 1324 based on Foata normal form. 2/5149 useless extension candidates. Maximal degree in co-relation 13585. Up to 4735 conditions per place. [2024-06-28 01:59:56,942 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-28 01:59:56,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 542 flow [2024-06-28 01:59:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:59:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:59:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 01:59:56,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234042553191489 [2024-06-28 01:59:56,946 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 123 transitions. [2024-06-28 01:59:56,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 542 flow [2024-06-28 01:59:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 509 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:59:56,953 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 337 flow [2024-06-28 01:59:56,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-28 01:59:56,954 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2024-06-28 01:59:56,954 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 337 flow [2024-06-28 01:59:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:56,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:56,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:59:56,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:59:56,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:56,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1904034792, now seen corresponding path program 1 times [2024-06-28 01:59:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:56,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307950014] [2024-06-28 01:59:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:56,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:59:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:59:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:59:58,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307950014] [2024-06-28 01:59:58,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307950014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:59:58,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:59:58,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:59:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046108061] [2024-06-28 01:59:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:59:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:59:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:59:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:59:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:59:58,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 01:59:58,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:58,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:59:58,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 01:59:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:59:59,385 INFO L124 PetriNetUnfolderBase]: 3305/5151 cut-off events. [2024-06-28 01:59:59,385 INFO L125 PetriNetUnfolderBase]: For 6141/6143 co-relation queries the response was YES. [2024-06-28 01:59:59,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14872 conditions, 5151 events. 3305/5151 cut-off events. For 6141/6143 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29488 event pairs, 1337 based on Foata normal form. 4/5154 useless extension candidates. Maximal degree in co-relation 14849. Up to 4730 conditions per place. [2024-06-28 01:59:59,418 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-28 01:59:59,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 556 flow [2024-06-28 01:59:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:59:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:59:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 01:59:59,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-28 01:59:59,423 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 337 flow. Second operand 5 states and 121 transitions. [2024-06-28 01:59:59,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 556 flow [2024-06-28 01:59:59,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 548 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 01:59:59,434 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 369 flow [2024-06-28 01:59:59,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-28 01:59:59,436 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-28 01:59:59,436 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 369 flow [2024-06-28 01:59:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:59:59,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:59:59,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:59:59,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:59:59,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:59:59,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:59:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash 210318688, now seen corresponding path program 1 times [2024-06-28 01:59:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:59:59,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102103450] [2024-06-28 01:59:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:59:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:59:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:01,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102103450] [2024-06-28 02:00:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102103450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:01,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061349165] [2024-06-28 02:00:01,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:01,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:01,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:01,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:01,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:03,347 INFO L124 PetriNetUnfolderBase]: 3336/4962 cut-off events. [2024-06-28 02:00:03,347 INFO L125 PetriNetUnfolderBase]: For 7002/7002 co-relation queries the response was YES. [2024-06-28 02:00:03,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 4962 events. 3336/4962 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26834 event pairs, 1003 based on Foata normal form. 2/4962 useless extension candidates. Maximal degree in co-relation 14976. Up to 4633 conditions per place. [2024-06-28 02:00:03,375 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-28 02:00:03,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 802 flow [2024-06-28 02:00:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:00:03,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-28 02:00:03,377 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 369 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:00:03,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 802 flow [2024-06-28 02:00:03,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 783 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:03,387 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 501 flow [2024-06-28 02:00:03,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-28 02:00:03,390 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-28 02:00:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 501 flow [2024-06-28 02:00:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:03,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:03,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:03,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:00:03,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1103506498, now seen corresponding path program 2 times [2024-06-28 02:00:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795769828] [2024-06-28 02:00:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:05,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:05,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795769828] [2024-06-28 02:00:05,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795769828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:05,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:05,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:05,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788412709] [2024-06-28 02:00:05,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:05,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:05,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:05,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:05,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:05,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:05,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:05,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:06,990 INFO L124 PetriNetUnfolderBase]: 3331/4946 cut-off events. [2024-06-28 02:00:06,990 INFO L125 PetriNetUnfolderBase]: For 10707/10713 co-relation queries the response was YES. [2024-06-28 02:00:07,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16660 conditions, 4946 events. 3331/4946 cut-off events. For 10707/10713 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26621 event pairs, 1017 based on Foata normal form. 8/4951 useless extension candidates. Maximal degree in co-relation 16630. Up to 4630 conditions per place. [2024-06-28 02:00:07,017 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-28 02:00:07,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 125 transitions, 911 flow [2024-06-28 02:00:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:00:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-28 02:00:07,020 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 501 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:00:07,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 125 transitions, 911 flow [2024-06-28 02:00:07,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 903 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:07,033 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 641 flow [2024-06-28 02:00:07,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-28 02:00:07,033 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-28 02:00:07,033 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 641 flow [2024-06-28 02:00:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:07,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:07,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:00:07,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:07,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1300013747, now seen corresponding path program 1 times [2024-06-28 02:00:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241978470] [2024-06-28 02:00:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241978470] [2024-06-28 02:00:09,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241978470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:09,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:09,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459980517] [2024-06-28 02:00:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:09,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 641 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:11,060 INFO L124 PetriNetUnfolderBase]: 3647/5479 cut-off events. [2024-06-28 02:00:11,061 INFO L125 PetriNetUnfolderBase]: For 13952/13958 co-relation queries the response was YES. [2024-06-28 02:00:11,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19531 conditions, 5479 events. 3647/5479 cut-off events. For 13952/13958 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30750 event pairs, 876 based on Foata normal form. 9/5487 useless extension candidates. Maximal degree in co-relation 19496. Up to 4911 conditions per place. [2024-06-28 02:00:11,094 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 147 selfloop transitions, 47 changer transitions 0/201 dead transitions. [2024-06-28 02:00:11,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 201 transitions, 1542 flow [2024-06-28 02:00:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:00:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:00:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-28 02:00:11,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-06-28 02:00:11,096 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 641 flow. Second operand 9 states and 242 transitions. [2024-06-28 02:00:11,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 201 transitions, 1542 flow [2024-06-28 02:00:11,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 201 transitions, 1532 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:11,112 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 995 flow [2024-06-28 02:00:11,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2024-06-28 02:00:11,113 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2024-06-28 02:00:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 995 flow [2024-06-28 02:00:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:11,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:11,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:00:11,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1899355469, now seen corresponding path program 2 times [2024-06-28 02:00:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145543735] [2024-06-28 02:00:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:13,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:13,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145543735] [2024-06-28 02:00:13,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145543735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:13,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:13,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019376345] [2024-06-28 02:00:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:14,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 995 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:14,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:14,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:14,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:15,639 INFO L124 PetriNetUnfolderBase]: 3763/5659 cut-off events. [2024-06-28 02:00:15,639 INFO L125 PetriNetUnfolderBase]: For 20838/20846 co-relation queries the response was YES. [2024-06-28 02:00:15,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22898 conditions, 5659 events. 3763/5659 cut-off events. For 20838/20846 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31832 event pairs, 809 based on Foata normal form. 11/5669 useless extension candidates. Maximal degree in co-relation 22857. Up to 4965 conditions per place. [2024-06-28 02:00:15,675 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 136 selfloop transitions, 53 changer transitions 0/196 dead transitions. [2024-06-28 02:00:15,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 196 transitions, 1724 flow [2024-06-28 02:00:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-28 02:00:15,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-28 02:00:15,678 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 995 flow. Second operand 8 states and 212 transitions. [2024-06-28 02:00:15,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 196 transitions, 1724 flow [2024-06-28 02:00:15,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 196 transitions, 1700 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:15,706 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 1185 flow [2024-06-28 02:00:15,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-28 02:00:15,708 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 49 predicate places. [2024-06-28 02:00:15,708 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 1185 flow [2024-06-28 02:00:15,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:15,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:15,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:00:15,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:15,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -627295143, now seen corresponding path program 3 times [2024-06-28 02:00:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:15,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899037952] [2024-06-28 02:00:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:18,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899037952] [2024-06-28 02:00:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899037952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:18,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:18,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332719586] [2024-06-28 02:00:18,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:18,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:18,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:18,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:18,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 1185 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:18,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:18,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:18,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:20,114 INFO L124 PetriNetUnfolderBase]: 3794/5675 cut-off events. [2024-06-28 02:00:20,114 INFO L125 PetriNetUnfolderBase]: For 28861/28863 co-relation queries the response was YES. [2024-06-28 02:00:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25280 conditions, 5675 events. 3794/5675 cut-off events. For 28861/28863 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31170 event pairs, 921 based on Foata normal form. 2/5674 useless extension candidates. Maximal degree in co-relation 25235. Up to 4951 conditions per place. [2024-06-28 02:00:20,149 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 143 selfloop transitions, 50 changer transitions 0/200 dead transitions. [2024-06-28 02:00:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 200 transitions, 2026 flow [2024-06-28 02:00:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:00:20,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-06-28 02:00:20,151 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 1185 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:00:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 200 transitions, 2026 flow [2024-06-28 02:00:20,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 200 transitions, 1928 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:20,185 INFO L231 Difference]: Finished difference. Result has 105 places, 145 transitions, 1526 flow [2024-06-28 02:00:20,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1526, PETRI_PLACES=105, PETRI_TRANSITIONS=145} [2024-06-28 02:00:20,187 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 54 predicate places. [2024-06-28 02:00:20,187 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 145 transitions, 1526 flow [2024-06-28 02:00:20,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:20,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:20,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:00:20,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:20,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1899350633, now seen corresponding path program 1 times [2024-06-28 02:00:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:20,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85960455] [2024-06-28 02:00:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:20,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85960455] [2024-06-28 02:00:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85960455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:22,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:22,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:22,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324841498] [2024-06-28 02:00:22,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:22,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:22,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:22,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:22,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 145 transitions, 1526 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:22,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:22,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:22,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:23,918 INFO L124 PetriNetUnfolderBase]: 3825/5734 cut-off events. [2024-06-28 02:00:23,918 INFO L125 PetriNetUnfolderBase]: For 33473/33481 co-relation queries the response was YES. [2024-06-28 02:00:23,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27033 conditions, 5734 events. 3825/5734 cut-off events. For 33473/33481 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 31768 event pairs, 902 based on Foata normal form. 10/5742 useless extension candidates. Maximal degree in co-relation 26984. Up to 5271 conditions per place. [2024-06-28 02:00:23,958 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 157 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-28 02:00:23,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 193 transitions, 2115 flow [2024-06-28 02:00:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:00:23,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-28 02:00:23,959 INFO L175 Difference]: Start difference. First operand has 105 places, 145 transitions, 1526 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:00:23,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 193 transitions, 2115 flow [2024-06-28 02:00:23,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 193 transitions, 2065 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:24,001 INFO L231 Difference]: Finished difference. Result has 109 places, 148 transitions, 1577 flow [2024-06-28 02:00:24,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1577, PETRI_PLACES=109, PETRI_TRANSITIONS=148} [2024-06-28 02:00:24,002 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 58 predicate places. [2024-06-28 02:00:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 148 transitions, 1577 flow [2024-06-28 02:00:24,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:24,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:24,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:00:24,003 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:24,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -128691665, now seen corresponding path program 4 times [2024-06-28 02:00:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950528278] [2024-06-28 02:00:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:26,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:26,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950528278] [2024-06-28 02:00:26,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950528278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:26,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:26,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:26,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427224517] [2024-06-28 02:00:26,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:26,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:26,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:26,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:26,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:26,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 148 transitions, 1577 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:26,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:26,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:26,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:28,508 INFO L124 PetriNetUnfolderBase]: 4154/6202 cut-off events. [2024-06-28 02:00:28,508 INFO L125 PetriNetUnfolderBase]: For 38189/38197 co-relation queries the response was YES. [2024-06-28 02:00:28,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 6202 events. 4154/6202 cut-off events. For 38189/38197 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33930 event pairs, 1060 based on Foata normal form. 3/6201 useless extension candidates. Maximal degree in co-relation 30039. Up to 5466 conditions per place. [2024-06-28 02:00:28,557 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 172 selfloop transitions, 58 changer transitions 0/237 dead transitions. [2024-06-28 02:00:28,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 237 transitions, 2734 flow [2024-06-28 02:00:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:00:28,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-28 02:00:28,562 INFO L175 Difference]: Start difference. First operand has 109 places, 148 transitions, 1577 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:00:28,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 237 transitions, 2734 flow [2024-06-28 02:00:28,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 237 transitions, 2685 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:28,602 INFO L231 Difference]: Finished difference. Result has 117 places, 182 transitions, 2227 flow [2024-06-28 02:00:28,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2227, PETRI_PLACES=117, PETRI_TRANSITIONS=182} [2024-06-28 02:00:28,603 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-28 02:00:28,603 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 182 transitions, 2227 flow [2024-06-28 02:00:28,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:28,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:28,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:00:28,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:28,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -121304489, now seen corresponding path program 2 times [2024-06-28 02:00:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:28,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914313734] [2024-06-28 02:00:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:30,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:30,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914313734] [2024-06-28 02:00:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914313734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:30,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:30,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229941985] [2024-06-28 02:00:30,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:30,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:30,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:30,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 182 transitions, 2227 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:30,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:30,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:30,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:32,043 INFO L124 PetriNetUnfolderBase]: 4149/6268 cut-off events. [2024-06-28 02:00:32,043 INFO L125 PetriNetUnfolderBase]: For 45188/45248 co-relation queries the response was YES. [2024-06-28 02:00:32,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31622 conditions, 6268 events. 4149/6268 cut-off events. For 45188/45248 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 35415 event pairs, 953 based on Foata normal form. 60/6327 useless extension candidates. Maximal degree in co-relation 31567. Up to 5667 conditions per place. [2024-06-28 02:00:32,090 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 183 selfloop transitions, 34 changer transitions 0/224 dead transitions. [2024-06-28 02:00:32,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 224 transitions, 2825 flow [2024-06-28 02:00:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:00:32,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:00:32,092 INFO L175 Difference]: Start difference. First operand has 117 places, 182 transitions, 2227 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:00:32,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 224 transitions, 2825 flow [2024-06-28 02:00:32,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 224 transitions, 2792 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:32,141 INFO L231 Difference]: Finished difference. Result has 121 places, 184 transitions, 2302 flow [2024-06-28 02:00:32,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2302, PETRI_PLACES=121, PETRI_TRANSITIONS=184} [2024-06-28 02:00:32,141 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-28 02:00:32,142 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 184 transitions, 2302 flow [2024-06-28 02:00:32,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:32,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:32,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:32,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:00:32,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:32,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -150788651, now seen corresponding path program 1 times [2024-06-28 02:00:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650251751] [2024-06-28 02:00:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650251751] [2024-06-28 02:00:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650251751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:33,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972551097] [2024-06-28 02:00:33,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:33,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 184 transitions, 2302 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:33,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:33,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:33,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:35,200 INFO L124 PetriNetUnfolderBase]: 4141/6456 cut-off events. [2024-06-28 02:00:35,200 INFO L125 PetriNetUnfolderBase]: For 49038/49044 co-relation queries the response was YES. [2024-06-28 02:00:35,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32095 conditions, 6456 events. 4141/6456 cut-off events. For 49038/49044 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 37489 event pairs, 1237 based on Foata normal form. 8/6463 useless extension candidates. Maximal degree in co-relation 32037. Up to 5845 conditions per place. [2024-06-28 02:00:35,249 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 194 selfloop transitions, 17 changer transitions 0/218 dead transitions. [2024-06-28 02:00:35,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 218 transitions, 2842 flow [2024-06-28 02:00:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:00:35,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-28 02:00:35,251 INFO L175 Difference]: Start difference. First operand has 121 places, 184 transitions, 2302 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:00:35,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 218 transitions, 2842 flow [2024-06-28 02:00:35,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 218 transitions, 2791 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:35,299 INFO L231 Difference]: Finished difference. Result has 124 places, 187 transitions, 2329 flow [2024-06-28 02:00:35,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2329, PETRI_PLACES=124, PETRI_TRANSITIONS=187} [2024-06-28 02:00:35,300 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-06-28 02:00:35,300 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 187 transitions, 2329 flow [2024-06-28 02:00:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:35,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:35,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:35,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:00:35,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:35,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:35,301 INFO L85 PathProgramCache]: Analyzing trace with hash 249141852, now seen corresponding path program 1 times [2024-06-28 02:00:35,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701383889] [2024-06-28 02:00:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:37,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701383889] [2024-06-28 02:00:37,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701383889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:37,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:37,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512498647] [2024-06-28 02:00:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:38,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:38,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 187 transitions, 2329 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:38,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:38,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:39,763 INFO L124 PetriNetUnfolderBase]: 4117/6219 cut-off events. [2024-06-28 02:00:39,763 INFO L125 PetriNetUnfolderBase]: For 47335/47345 co-relation queries the response was YES. [2024-06-28 02:00:39,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31982 conditions, 6219 events. 4117/6219 cut-off events. For 47335/47345 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34980 event pairs, 884 based on Foata normal form. 19/6237 useless extension candidates. Maximal degree in co-relation 31923. Up to 5316 conditions per place. [2024-06-28 02:00:39,801 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 161 selfloop transitions, 88 changer transitions 0/256 dead transitions. [2024-06-28 02:00:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 256 transitions, 3081 flow [2024-06-28 02:00:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:00:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-28 02:00:39,803 INFO L175 Difference]: Start difference. First operand has 124 places, 187 transitions, 2329 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:00:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 256 transitions, 3081 flow [2024-06-28 02:00:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 256 transitions, 3007 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:39,859 INFO L231 Difference]: Finished difference. Result has 128 places, 187 transitions, 2459 flow [2024-06-28 02:00:39,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2459, PETRI_PLACES=128, PETRI_TRANSITIONS=187} [2024-06-28 02:00:39,860 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-28 02:00:39,860 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 187 transitions, 2459 flow [2024-06-28 02:00:39,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:39,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:00:39,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:39,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 252866502, now seen corresponding path program 2 times [2024-06-28 02:00:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71367822] [2024-06-28 02:00:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:42,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71367822] [2024-06-28 02:00:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71367822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:42,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845163183] [2024-06-28 02:00:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:42,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 187 transitions, 2459 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:44,191 INFO L124 PetriNetUnfolderBase]: 4215/6374 cut-off events. [2024-06-28 02:00:44,191 INFO L125 PetriNetUnfolderBase]: For 56396/56403 co-relation queries the response was YES. [2024-06-28 02:00:44,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33688 conditions, 6374 events. 4215/6374 cut-off events. For 56396/56403 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 36059 event pairs, 964 based on Foata normal form. 8/6380 useless extension candidates. Maximal degree in co-relation 33628. Up to 5263 conditions per place. [2024-06-28 02:00:44,236 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 157 selfloop transitions, 88 changer transitions 0/252 dead transitions. [2024-06-28 02:00:44,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 252 transitions, 3380 flow [2024-06-28 02:00:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:00:44,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-28 02:00:44,238 INFO L175 Difference]: Start difference. First operand has 128 places, 187 transitions, 2459 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:00:44,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 252 transitions, 3380 flow [2024-06-28 02:00:44,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 252 transitions, 3176 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 02:00:44,288 INFO L231 Difference]: Finished difference. Result has 128 places, 197 transitions, 2590 flow [2024-06-28 02:00:44,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2590, PETRI_PLACES=128, PETRI_TRANSITIONS=197} [2024-06-28 02:00:44,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-28 02:00:44,289 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 197 transitions, 2590 flow [2024-06-28 02:00:44,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:44,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:44,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:44,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:00:44,290 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:44,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash 252860922, now seen corresponding path program 3 times [2024-06-28 02:00:44,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:44,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310133444] [2024-06-28 02:00:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310133444] [2024-06-28 02:00:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310133444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:47,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:00:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178337281] [2024-06-28 02:00:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:00:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:00:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:00:47,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 197 transitions, 2590 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:47,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:49,151 INFO L124 PetriNetUnfolderBase]: 4241/6379 cut-off events. [2024-06-28 02:00:49,151 INFO L125 PetriNetUnfolderBase]: For 53324/53326 co-relation queries the response was YES. [2024-06-28 02:00:49,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33649 conditions, 6379 events. 4241/6379 cut-off events. For 53324/53326 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 35565 event pairs, 966 based on Foata normal form. 4/6378 useless extension candidates. Maximal degree in co-relation 33588. Up to 5290 conditions per place. [2024-06-28 02:00:49,201 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 158 selfloop transitions, 99 changer transitions 0/264 dead transitions. [2024-06-28 02:00:49,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 264 transitions, 3413 flow [2024-06-28 02:00:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:00:49,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-28 02:00:49,202 INFO L175 Difference]: Start difference. First operand has 128 places, 197 transitions, 2590 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:00:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 264 transitions, 3413 flow [2024-06-28 02:00:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 264 transitions, 3289 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:49,334 INFO L231 Difference]: Finished difference. Result has 133 places, 200 transitions, 2722 flow [2024-06-28 02:00:49,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2722, PETRI_PLACES=133, PETRI_TRANSITIONS=200} [2024-06-28 02:00:49,334 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-06-28 02:00:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 200 transitions, 2722 flow [2024-06-28 02:00:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:49,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:49,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:00:49,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:49,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -387112868, now seen corresponding path program 4 times [2024-06-28 02:00:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035092973] [2024-06-28 02:00:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:52,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035092973] [2024-06-28 02:00:52,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035092973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:52,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:52,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:00:52,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815442656] [2024-06-28 02:00:52,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:00:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:00:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:00:52,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:52,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 200 transitions, 2722 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:52,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:52,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:54,245 INFO L124 PetriNetUnfolderBase]: 4236/6332 cut-off events. [2024-06-28 02:00:54,245 INFO L125 PetriNetUnfolderBase]: For 59809/59817 co-relation queries the response was YES. [2024-06-28 02:00:54,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 6332 events. 4236/6332 cut-off events. For 59809/59817 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34774 event pairs, 1038 based on Foata normal form. 4/6327 useless extension candidates. Maximal degree in co-relation 33721. Up to 5285 conditions per place. [2024-06-28 02:00:54,291 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 155 selfloop transitions, 100 changer transitions 0/262 dead transitions. [2024-06-28 02:00:54,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 262 transitions, 3499 flow [2024-06-28 02:00:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:00:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:00:54,293 INFO L175 Difference]: Start difference. First operand has 133 places, 200 transitions, 2722 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:00:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 262 transitions, 3499 flow [2024-06-28 02:00:54,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 262 transitions, 3269 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:00:54,360 INFO L231 Difference]: Finished difference. Result has 135 places, 200 transitions, 2700 flow [2024-06-28 02:00:54,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=135, PETRI_TRANSITIONS=200} [2024-06-28 02:00:54,360 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2024-06-28 02:00:54,360 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 200 transitions, 2700 flow [2024-06-28 02:00:54,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:54,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:54,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:54,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:00:54,361 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:54,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash 534530152, now seen corresponding path program 5 times [2024-06-28 02:00:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377475296] [2024-06-28 02:00:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:56,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:56,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377475296] [2024-06-28 02:00:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377475296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:56,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:56,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214510694] [2024-06-28 02:00:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:56,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:56,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 200 transitions, 2700 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:56,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:56,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:56,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:58,366 INFO L124 PetriNetUnfolderBase]: 4231/6404 cut-off events. [2024-06-28 02:00:58,367 INFO L125 PetriNetUnfolderBase]: For 64307/64359 co-relation queries the response was YES. [2024-06-28 02:00:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33803 conditions, 6404 events. 4231/6404 cut-off events. For 64307/64359 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 36226 event pairs, 1016 based on Foata normal form. 30/6432 useless extension candidates. Maximal degree in co-relation 33740. Up to 5280 conditions per place. [2024-06-28 02:00:58,488 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 154 selfloop transitions, 89 changer transitions 0/250 dead transitions. [2024-06-28 02:00:58,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 250 transitions, 3366 flow [2024-06-28 02:00:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:00:58,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-28 02:00:58,489 INFO L175 Difference]: Start difference. First operand has 135 places, 200 transitions, 2700 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:00:58,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 250 transitions, 3366 flow [2024-06-28 02:00:58,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 250 transitions, 3226 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:00:58,560 INFO L231 Difference]: Finished difference. Result has 137 places, 201 transitions, 2763 flow [2024-06-28 02:00:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2763, PETRI_PLACES=137, PETRI_TRANSITIONS=201} [2024-06-28 02:00:58,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-28 02:00:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 201 transitions, 2763 flow [2024-06-28 02:00:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:58,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:58,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:00:58,561 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1798885608, now seen corresponding path program 1 times [2024-06-28 02:00:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387518230] [2024-06-28 02:00:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387518230] [2024-06-28 02:01:01,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387518230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:01,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:01,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815093925] [2024-06-28 02:01:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:01,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:01,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 201 transitions, 2763 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:01,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:01,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:01,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:03,842 INFO L124 PetriNetUnfolderBase]: 4816/7312 cut-off events. [2024-06-28 02:01:03,842 INFO L125 PetriNetUnfolderBase]: For 72025/72035 co-relation queries the response was YES. [2024-06-28 02:01:03,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38347 conditions, 7312 events. 4816/7312 cut-off events. For 72025/72035 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42788 event pairs, 573 based on Foata normal form. 16/7327 useless extension candidates. Maximal degree in co-relation 38282. Up to 5352 conditions per place. [2024-06-28 02:01:03,899 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 198 selfloop transitions, 89 changer transitions 0/294 dead transitions. [2024-06-28 02:01:03,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 294 transitions, 3780 flow [2024-06-28 02:01:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-28 02:01:03,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-28 02:01:03,901 INFO L175 Difference]: Start difference. First operand has 137 places, 201 transitions, 2763 flow. Second operand 9 states and 243 transitions. [2024-06-28 02:01:03,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 294 transitions, 3780 flow [2024-06-28 02:01:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 294 transitions, 3643 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:01:04,004 INFO L231 Difference]: Finished difference. Result has 143 places, 208 transitions, 2930 flow [2024-06-28 02:01:04,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2930, PETRI_PLACES=143, PETRI_TRANSITIONS=208} [2024-06-28 02:01:04,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-28 02:01:04,004 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 208 transitions, 2930 flow [2024-06-28 02:01:04,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:04,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:01:04,005 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -866539908, now seen corresponding path program 2 times [2024-06-28 02:01:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195481415] [2024-06-28 02:01:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195481415] [2024-06-28 02:01:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195481415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:06,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938709379] [2024-06-28 02:01:06,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:06,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:06,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:06,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 208 transitions, 2930 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:06,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:06,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:06,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:08,971 INFO L124 PetriNetUnfolderBase]: 4803/7293 cut-off events. [2024-06-28 02:01:08,972 INFO L125 PetriNetUnfolderBase]: For 80631/80641 co-relation queries the response was YES. [2024-06-28 02:01:09,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39354 conditions, 7293 events. 4803/7293 cut-off events. For 80631/80641 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42719 event pairs, 862 based on Foata normal form. 16/7308 useless extension candidates. Maximal degree in co-relation 39286. Up to 6208 conditions per place. [2024-06-28 02:01:09,025 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 192 selfloop transitions, 91 changer transitions 0/290 dead transitions. [2024-06-28 02:01:09,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 290 transitions, 3799 flow [2024-06-28 02:01:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:01:09,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-28 02:01:09,026 INFO L175 Difference]: Start difference. First operand has 143 places, 208 transitions, 2930 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:01:09,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 290 transitions, 3799 flow [2024-06-28 02:01:09,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 290 transitions, 3667 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:09,163 INFO L231 Difference]: Finished difference. Result has 147 places, 211 transitions, 3045 flow [2024-06-28 02:01:09,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3045, PETRI_PLACES=147, PETRI_TRANSITIONS=211} [2024-06-28 02:01:09,164 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-28 02:01:09,164 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 211 transitions, 3045 flow [2024-06-28 02:01:09,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:09,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:09,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:01:09,164 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1535145480, now seen corresponding path program 3 times [2024-06-28 02:01:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:09,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904955718] [2024-06-28 02:01:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:12,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:12,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904955718] [2024-06-28 02:01:12,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904955718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:12,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:12,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599876841] [2024-06-28 02:01:12,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:12,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:12,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 211 transitions, 3045 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:12,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:12,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:12,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:14,210 INFO L124 PetriNetUnfolderBase]: 4853/7299 cut-off events. [2024-06-28 02:01:14,210 INFO L125 PetriNetUnfolderBase]: For 90977/90979 co-relation queries the response was YES. [2024-06-28 02:01:14,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40609 conditions, 7299 events. 4853/7299 cut-off events. For 90977/90979 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41786 event pairs, 953 based on Foata normal form. 4/7297 useless extension candidates. Maximal degree in co-relation 40539. Up to 6148 conditions per place. [2024-06-28 02:01:14,266 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 167 selfloop transitions, 102 changer transitions 0/276 dead transitions. [2024-06-28 02:01:14,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 276 transitions, 3818 flow [2024-06-28 02:01:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:01:14,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:01:14,268 INFO L175 Difference]: Start difference. First operand has 147 places, 211 transitions, 3045 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:01:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 276 transitions, 3818 flow [2024-06-28 02:01:14,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 276 transitions, 3619 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 02:01:14,436 INFO L231 Difference]: Finished difference. Result has 148 places, 213 transitions, 3096 flow [2024-06-28 02:01:14,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3096, PETRI_PLACES=148, PETRI_TRANSITIONS=213} [2024-06-28 02:01:14,436 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-06-28 02:01:14,436 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 213 transitions, 3096 flow [2024-06-28 02:01:14,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:14,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:14,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:01:14,437 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:14,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1885751854, now seen corresponding path program 1 times [2024-06-28 02:01:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466134541] [2024-06-28 02:01:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:14,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:16,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466134541] [2024-06-28 02:01:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466134541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:16,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:16,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326788522] [2024-06-28 02:01:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:16,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:16,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 213 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:16,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:16,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:16,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:18,821 INFO L124 PetriNetUnfolderBase]: 4903/7433 cut-off events. [2024-06-28 02:01:18,821 INFO L125 PetriNetUnfolderBase]: For 97970/97994 co-relation queries the response was YES. [2024-06-28 02:01:18,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41462 conditions, 7433 events. 4903/7433 cut-off events. For 97970/97994 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 43465 event pairs, 882 based on Foata normal form. 26/7457 useless extension candidates. Maximal degree in co-relation 41391. Up to 6722 conditions per place. [2024-06-28 02:01:18,883 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 223 selfloop transitions, 39 changer transitions 0/269 dead transitions. [2024-06-28 02:01:18,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 269 transitions, 3821 flow [2024-06-28 02:01:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:01:18,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-28 02:01:18,885 INFO L175 Difference]: Start difference. First operand has 148 places, 213 transitions, 3096 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:01:18,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 269 transitions, 3821 flow [2024-06-28 02:01:19,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 269 transitions, 3622 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:19,064 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 3011 flow [2024-06-28 02:01:19,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3011, PETRI_PLACES=150, PETRI_TRANSITIONS=215} [2024-06-28 02:01:19,065 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-28 02:01:19,065 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 3011 flow [2024-06-28 02:01:19,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:19,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:19,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:01:19,065 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:19,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 881427022, now seen corresponding path program 4 times [2024-06-28 02:01:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523944911] [2024-06-28 02:01:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:21,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523944911] [2024-06-28 02:01:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523944911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:21,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:21,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173140921] [2024-06-28 02:01:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:21,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:21,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 215 transitions, 3011 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:21,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:21,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:21,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:23,973 INFO L124 PetriNetUnfolderBase]: 4895/7321 cut-off events. [2024-06-28 02:01:23,973 INFO L125 PetriNetUnfolderBase]: For 100042/100050 co-relation queries the response was YES. [2024-06-28 02:01:23,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40982 conditions, 7321 events. 4895/7321 cut-off events. For 100042/100050 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41475 event pairs, 1017 based on Foata normal form. 6/7317 useless extension candidates. Maximal degree in co-relation 40910. Up to 6222 conditions per place. [2024-06-28 02:01:24,024 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 168 selfloop transitions, 103 changer transitions 0/278 dead transitions. [2024-06-28 02:01:24,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 278 transitions, 3794 flow [2024-06-28 02:01:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:01:24,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-28 02:01:24,026 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 3011 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:01:24,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 278 transitions, 3794 flow [2024-06-28 02:01:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 278 transitions, 3704 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:24,166 INFO L231 Difference]: Finished difference. Result has 153 places, 217 transitions, 3178 flow [2024-06-28 02:01:24,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3178, PETRI_PLACES=153, PETRI_TRANSITIONS=217} [2024-06-28 02:01:24,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 102 predicate places. [2024-06-28 02:01:24,167 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 217 transitions, 3178 flow [2024-06-28 02:01:24,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:24,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:24,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:01:24,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:24,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -609425482, now seen corresponding path program 2 times [2024-06-28 02:01:24,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956891345] [2024-06-28 02:01:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956891345] [2024-06-28 02:01:26,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956891345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:26,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:26,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:26,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033246672] [2024-06-28 02:01:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:26,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:26,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 217 transitions, 3178 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:26,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:26,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:28,348 INFO L124 PetriNetUnfolderBase]: 4945/7509 cut-off events. [2024-06-28 02:01:28,349 INFO L125 PetriNetUnfolderBase]: For 111840/111900 co-relation queries the response was YES. [2024-06-28 02:01:28,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42531 conditions, 7509 events. 4945/7509 cut-off events. For 111840/111900 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 44080 event pairs, 918 based on Foata normal form. 62/7570 useless extension candidates. Maximal degree in co-relation 42458. Up to 6796 conditions per place. [2024-06-28 02:01:28,404 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 228 selfloop transitions, 36 changer transitions 0/271 dead transitions. [2024-06-28 02:01:28,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 271 transitions, 3913 flow [2024-06-28 02:01:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:01:28,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:01:28,405 INFO L175 Difference]: Start difference. First operand has 153 places, 217 transitions, 3178 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:01:28,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 271 transitions, 3913 flow [2024-06-28 02:01:28,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 271 transitions, 3678 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:28,598 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 3056 flow [2024-06-28 02:01:28,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3056, PETRI_PLACES=154, PETRI_TRANSITIONS=219} [2024-06-28 02:01:28,598 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-28 02:01:28,598 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 3056 flow [2024-06-28 02:01:28,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:28,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:28,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:28,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:01:28,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:28,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1121056980, now seen corresponding path program 3 times [2024-06-28 02:01:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357579678] [2024-06-28 02:01:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357579678] [2024-06-28 02:01:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357579678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:30,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397743320] [2024-06-28 02:01:30,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:30,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:30,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 219 transitions, 3056 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:30,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:30,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:32,600 INFO L124 PetriNetUnfolderBase]: 4937/7497 cut-off events. [2024-06-28 02:01:32,600 INFO L125 PetriNetUnfolderBase]: For 111104/111164 co-relation queries the response was YES. [2024-06-28 02:01:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41949 conditions, 7497 events. 4937/7497 cut-off events. For 111104/111164 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 44027 event pairs, 814 based on Foata normal form. 62/7558 useless extension candidates. Maximal degree in co-relation 41875. Up to 6622 conditions per place. [2024-06-28 02:01:32,656 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 227 selfloop transitions, 42 changer transitions 0/276 dead transitions. [2024-06-28 02:01:32,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 276 transitions, 3843 flow [2024-06-28 02:01:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:01:32,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-28 02:01:32,657 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 3056 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:01:32,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 276 transitions, 3843 flow [2024-06-28 02:01:32,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 276 transitions, 3752 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:32,839 INFO L231 Difference]: Finished difference. Result has 157 places, 223 transitions, 3146 flow [2024-06-28 02:01:32,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3146, PETRI_PLACES=157, PETRI_TRANSITIONS=223} [2024-06-28 02:01:32,840 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-28 02:01:32,840 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 223 transitions, 3146 flow [2024-06-28 02:01:32,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:32,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:32,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:32,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:01:32,841 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:32,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash 93836332, now seen corresponding path program 1 times [2024-06-28 02:01:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:32,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997107192] [2024-06-28 02:01:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997107192] [2024-06-28 02:01:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997107192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:34,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:01:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457272647] [2024-06-28 02:01:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:01:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:01:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:01:34,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:01:34,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 223 transitions, 3146 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:34,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:34,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:01:34,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:35,986 INFO L124 PetriNetUnfolderBase]: 4604/7330 cut-off events. [2024-06-28 02:01:35,987 INFO L125 PetriNetUnfolderBase]: For 115639/115724 co-relation queries the response was YES. [2024-06-28 02:01:36,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40370 conditions, 7330 events. 4604/7330 cut-off events. For 115639/115724 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 45495 event pairs, 1272 based on Foata normal form. 83/7400 useless extension candidates. Maximal degree in co-relation 40294. Up to 6531 conditions per place. [2024-06-28 02:01:36,051 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 212 selfloop transitions, 14 changer transitions 0/245 dead transitions. [2024-06-28 02:01:36,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 245 transitions, 3680 flow [2024-06-28 02:01:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:01:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:01:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:01:36,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-28 02:01:36,053 INFO L175 Difference]: Start difference. First operand has 157 places, 223 transitions, 3146 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:01:36,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 245 transitions, 3680 flow [2024-06-28 02:01:36,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 245 transitions, 3598 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:36,232 INFO L231 Difference]: Finished difference. Result has 159 places, 227 transitions, 3139 flow [2024-06-28 02:01:36,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3139, PETRI_PLACES=159, PETRI_TRANSITIONS=227} [2024-06-28 02:01:36,232 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-28 02:01:36,232 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 227 transitions, 3139 flow [2024-06-28 02:01:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:36,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:36,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:01:36,233 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:36,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1181496931, now seen corresponding path program 1 times [2024-06-28 02:01:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:36,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846103285] [2024-06-28 02:01:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846103285] [2024-06-28 02:01:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846103285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:39,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:39,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035981437] [2024-06-28 02:01:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:39,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:39,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:39,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:39,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 227 transitions, 3139 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:39,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:39,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:39,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:41,655 INFO L124 PetriNetUnfolderBase]: 5155/7839 cut-off events. [2024-06-28 02:01:41,655 INFO L125 PetriNetUnfolderBase]: For 120900/120910 co-relation queries the response was YES. [2024-06-28 02:01:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44999 conditions, 7839 events. 5155/7839 cut-off events. For 120900/120910 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46287 event pairs, 580 based on Foata normal form. 28/7866 useless extension candidates. Maximal degree in co-relation 44921. Up to 5634 conditions per place. [2024-06-28 02:01:41,722 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 216 selfloop transitions, 93 changer transitions 0/316 dead transitions. [2024-06-28 02:01:41,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 316 transitions, 4196 flow [2024-06-28 02:01:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-28 02:01:41,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-06-28 02:01:41,724 INFO L175 Difference]: Start difference. First operand has 159 places, 227 transitions, 3139 flow. Second operand 9 states and 244 transitions. [2024-06-28 02:01:41,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 316 transitions, 4196 flow [2024-06-28 02:01:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 316 transitions, 4149 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:41,929 INFO L231 Difference]: Finished difference. Result has 165 places, 229 transitions, 3318 flow [2024-06-28 02:01:41,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3318, PETRI_PLACES=165, PETRI_TRANSITIONS=229} [2024-06-28 02:01:41,930 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-28 02:01:41,930 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 229 transitions, 3318 flow [2024-06-28 02:01:41,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:41,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:41,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:01:41,930 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:41,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash -483247703, now seen corresponding path program 2 times [2024-06-28 02:01:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36376971] [2024-06-28 02:01:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:45,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36376971] [2024-06-28 02:01:45,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36376971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:45,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:45,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082670223] [2024-06-28 02:01:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:45,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:45,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 229 transitions, 3318 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:45,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:45,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:45,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:47,323 INFO L124 PetriNetUnfolderBase]: 5109/7769 cut-off events. [2024-06-28 02:01:47,323 INFO L125 PetriNetUnfolderBase]: For 122145/122155 co-relation queries the response was YES. [2024-06-28 02:01:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45206 conditions, 7769 events. 5109/7769 cut-off events. For 122145/122155 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 45697 event pairs, 872 based on Foata normal form. 34/7802 useless extension candidates. Maximal degree in co-relation 45127. Up to 6322 conditions per place. [2024-06-28 02:01:47,391 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 215 selfloop transitions, 90 changer transitions 0/312 dead transitions. [2024-06-28 02:01:47,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 312 transitions, 4236 flow [2024-06-28 02:01:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-28 02:01:47,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-28 02:01:47,392 INFO L175 Difference]: Start difference. First operand has 165 places, 229 transitions, 3318 flow. Second operand 9 states and 238 transitions. [2024-06-28 02:01:47,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 312 transitions, 4236 flow [2024-06-28 02:01:47,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 312 transitions, 4075 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:47,661 INFO L231 Difference]: Finished difference. Result has 168 places, 230 transitions, 3378 flow [2024-06-28 02:01:47,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3378, PETRI_PLACES=168, PETRI_TRANSITIONS=230} [2024-06-28 02:01:47,662 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-28 02:01:47,662 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 230 transitions, 3378 flow [2024-06-28 02:01:47,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:47,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:47,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:47,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:01:47,662 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:47,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -344719553, now seen corresponding path program 3 times [2024-06-28 02:01:47,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:47,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896663402] [2024-06-28 02:01:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:47,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:50,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896663402] [2024-06-28 02:01:50,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896663402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:50,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:50,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:01:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889667716] [2024-06-28 02:01:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:50,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:01:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:01:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:01:50,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:50,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 230 transitions, 3378 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:50,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:50,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:50,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:53,280 INFO L124 PetriNetUnfolderBase]: 5285/7997 cut-off events. [2024-06-28 02:01:53,280 INFO L125 PetriNetUnfolderBase]: For 131168/131170 co-relation queries the response was YES. [2024-06-28 02:01:53,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46775 conditions, 7997 events. 5285/7997 cut-off events. For 131168/131170 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 46769 event pairs, 986 based on Foata normal form. 16/8008 useless extension candidates. Maximal degree in co-relation 46695. Up to 6612 conditions per place. [2024-06-28 02:01:53,350 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 200 selfloop transitions, 101 changer transitions 0/308 dead transitions. [2024-06-28 02:01:53,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 308 transitions, 4273 flow [2024-06-28 02:01:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:01:53,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:01:53,352 INFO L175 Difference]: Start difference. First operand has 168 places, 230 transitions, 3378 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:01:53,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 308 transitions, 4273 flow [2024-06-28 02:01:53,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 308 transitions, 4148 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:53,599 INFO L231 Difference]: Finished difference. Result has 172 places, 231 transitions, 3492 flow [2024-06-28 02:01:53,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3492, PETRI_PLACES=172, PETRI_TRANSITIONS=231} [2024-06-28 02:01:53,600 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-28 02:01:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 231 transitions, 3492 flow [2024-06-28 02:01:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:53,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:53,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:53,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:01:53,601 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:53,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash -344867423, now seen corresponding path program 4 times [2024-06-28 02:01:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058980352] [2024-06-28 02:01:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:56,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058980352] [2024-06-28 02:01:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058980352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:56,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:56,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:01:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412989492] [2024-06-28 02:01:56,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:01:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:01:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:01:56,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:56,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 231 transitions, 3492 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:56,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:56,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:56,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:59,637 INFO L124 PetriNetUnfolderBase]: 5411/8195 cut-off events. [2024-06-28 02:01:59,638 INFO L125 PetriNetUnfolderBase]: For 140628/140630 co-relation queries the response was YES. [2024-06-28 02:01:59,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48419 conditions, 8195 events. 5411/8195 cut-off events. For 140628/140630 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 48178 event pairs, 974 based on Foata normal form. 12/8202 useless extension candidates. Maximal degree in co-relation 48338. Up to 6578 conditions per place. [2024-06-28 02:01:59,700 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 212 selfloop transitions, 104 changer transitions 0/323 dead transitions. [2024-06-28 02:01:59,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 323 transitions, 4471 flow [2024-06-28 02:01:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:01:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:01:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-28 02:01:59,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-06-28 02:01:59,702 INFO L175 Difference]: Start difference. First operand has 172 places, 231 transitions, 3492 flow. Second operand 10 states and 261 transitions. [2024-06-28 02:01:59,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 323 transitions, 4471 flow [2024-06-28 02:01:59,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 323 transitions, 4260 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 02:01:59,937 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 3525 flow [2024-06-28 02:01:59,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3525, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2024-06-28 02:01:59,937 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-06-28 02:01:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 3525 flow [2024-06-28 02:01:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:59,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:01:59,938 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:59,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -339357173, now seen corresponding path program 5 times [2024-06-28 02:01:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:59,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483959103] [2024-06-28 02:01:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483959103] [2024-06-28 02:02:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483959103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:02,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873679878] [2024-06-28 02:02:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:02,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:03,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:03,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 3525 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:03,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:03,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:03,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:05,213 INFO L124 PetriNetUnfolderBase]: 5587/8534 cut-off events. [2024-06-28 02:02:05,214 INFO L125 PetriNetUnfolderBase]: For 155254/155261 co-relation queries the response was YES. [2024-06-28 02:02:05,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50109 conditions, 8534 events. 5587/8534 cut-off events. For 155254/155261 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 51626 event pairs, 1044 based on Foata normal form. 20/8552 useless extension candidates. Maximal degree in co-relation 50027. Up to 7082 conditions per place. [2024-06-28 02:02:05,285 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 199 selfloop transitions, 93 changer transitions 0/299 dead transitions. [2024-06-28 02:02:05,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 299 transitions, 4368 flow [2024-06-28 02:02:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:02:05,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-28 02:02:05,287 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 3525 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:02:05,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 299 transitions, 4368 flow [2024-06-28 02:02:05,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 299 transitions, 4144 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:05,530 INFO L231 Difference]: Finished difference. Result has 175 places, 233 transitions, 3528 flow [2024-06-28 02:02:05,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3528, PETRI_PLACES=175, PETRI_TRANSITIONS=233} [2024-06-28 02:02:05,531 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 124 predicate places. [2024-06-28 02:02:05,531 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 233 transitions, 3528 flow [2024-06-28 02:02:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:05,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:05,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:02:05,532 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1808146745, now seen corresponding path program 1 times [2024-06-28 02:02:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223594704] [2024-06-28 02:02:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223594704] [2024-06-28 02:02:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223594704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:08,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:08,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331284051] [2024-06-28 02:02:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:08,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:08,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 233 transitions, 3528 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:08,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:08,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:08,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:10,587 INFO L124 PetriNetUnfolderBase]: 5917/9072 cut-off events. [2024-06-28 02:02:10,588 INFO L125 PetriNetUnfolderBase]: For 175471/175478 co-relation queries the response was YES. [2024-06-28 02:02:10,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53546 conditions, 9072 events. 5917/9072 cut-off events. For 175471/175478 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 55734 event pairs, 1068 based on Foata normal form. 16/9086 useless extension candidates. Maximal degree in co-relation 53463. Up to 6540 conditions per place. [2024-06-28 02:02:10,668 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 201 selfloop transitions, 98 changer transitions 0/306 dead transitions. [2024-06-28 02:02:10,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 4557 flow [2024-06-28 02:02:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:02:10,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-28 02:02:10,669 INFO L175 Difference]: Start difference. First operand has 175 places, 233 transitions, 3528 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:02:10,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 4557 flow [2024-06-28 02:02:10,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 306 transitions, 4358 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:10,992 INFO L231 Difference]: Finished difference. Result has 177 places, 235 transitions, 3597 flow [2024-06-28 02:02:10,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3597, PETRI_PLACES=177, PETRI_TRANSITIONS=235} [2024-06-28 02:02:10,993 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2024-06-28 02:02:10,993 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 235 transitions, 3597 flow [2024-06-28 02:02:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:10,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:10,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:02:10,993 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:10,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -389589091, now seen corresponding path program 6 times [2024-06-28 02:02:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:10,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904312796] [2024-06-28 02:02:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:13,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:13,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904312796] [2024-06-28 02:02:13,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904312796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:13,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533771090] [2024-06-28 02:02:13,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:13,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:13,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:13,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 235 transitions, 3597 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:13,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:13,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:16,175 INFO L124 PetriNetUnfolderBase]: 6093/9368 cut-off events. [2024-06-28 02:02:16,175 INFO L125 PetriNetUnfolderBase]: For 191904/191956 co-relation queries the response was YES. [2024-06-28 02:02:16,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55385 conditions, 9368 events. 6093/9368 cut-off events. For 191904/191956 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 58080 event pairs, 1214 based on Foata normal form. 44/9410 useless extension candidates. Maximal degree in co-relation 55301. Up to 7892 conditions per place. [2024-06-28 02:02:16,261 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 203 selfloop transitions, 90 changer transitions 0/300 dead transitions. [2024-06-28 02:02:16,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 300 transitions, 4448 flow [2024-06-28 02:02:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:02:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:02:16,263 INFO L175 Difference]: Start difference. First operand has 177 places, 235 transitions, 3597 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:02:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 300 transitions, 4448 flow [2024-06-28 02:02:16,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 300 transitions, 4315 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:16,643 INFO L231 Difference]: Finished difference. Result has 181 places, 236 transitions, 3687 flow [2024-06-28 02:02:16,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=181, PETRI_TRANSITIONS=236} [2024-06-28 02:02:16,644 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 130 predicate places. [2024-06-28 02:02:16,644 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 236 transitions, 3687 flow [2024-06-28 02:02:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:16,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:16,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:16,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:02:16,644 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:16,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1554439827, now seen corresponding path program 7 times [2024-06-28 02:02:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496367958] [2024-06-28 02:02:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496367958] [2024-06-28 02:02:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496367958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:19,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:19,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872209168] [2024-06-28 02:02:19,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:19,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:19,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:19,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:19,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:19,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:19,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 236 transitions, 3687 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:19,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:19,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:19,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:22,502 INFO L124 PetriNetUnfolderBase]: 6065/9253 cut-off events. [2024-06-28 02:02:22,502 INFO L125 PetriNetUnfolderBase]: For 180077/180085 co-relation queries the response was YES. [2024-06-28 02:02:22,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55033 conditions, 9253 events. 6065/9253 cut-off events. For 180077/180085 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 56293 event pairs, 1228 based on Foata normal form. 18/9262 useless extension candidates. Maximal degree in co-relation 54947. Up to 7848 conditions per place. [2024-06-28 02:02:22,593 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 202 selfloop transitions, 102 changer transitions 0/311 dead transitions. [2024-06-28 02:02:22,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 311 transitions, 4564 flow [2024-06-28 02:02:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-28 02:02:22,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-28 02:02:22,594 INFO L175 Difference]: Start difference. First operand has 181 places, 236 transitions, 3687 flow. Second operand 9 states and 229 transitions. [2024-06-28 02:02:22,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 311 transitions, 4564 flow [2024-06-28 02:02:23,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 311 transitions, 4355 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:23,004 INFO L231 Difference]: Finished difference. Result has 184 places, 236 transitions, 3689 flow [2024-06-28 02:02:23,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3689, PETRI_PLACES=184, PETRI_TRANSITIONS=236} [2024-06-28 02:02:23,005 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-28 02:02:23,005 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 236 transitions, 3689 flow [2024-06-28 02:02:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:23,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:23,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:23,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:02:23,005 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:23,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -709037219, now seen corresponding path program 8 times [2024-06-28 02:02:23,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:23,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870331885] [2024-06-28 02:02:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:23,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870331885] [2024-06-28 02:02:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870331885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780070726] [2024-06-28 02:02:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:26,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:26,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:26,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 236 transitions, 3689 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:26,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:26,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:26,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:29,148 INFO L124 PetriNetUnfolderBase]: 6133/9353 cut-off events. [2024-06-28 02:02:29,149 INFO L125 PetriNetUnfolderBase]: For 173751/173759 co-relation queries the response was YES. [2024-06-28 02:02:29,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54948 conditions, 9353 events. 6133/9353 cut-off events. For 173751/173759 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57028 event pairs, 1200 based on Foata normal form. 14/9358 useless extension candidates. Maximal degree in co-relation 54861. Up to 7740 conditions per place. [2024-06-28 02:02:29,227 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 214 selfloop transitions, 105 changer transitions 0/326 dead transitions. [2024-06-28 02:02:29,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 326 transitions, 4684 flow [2024-06-28 02:02:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:02:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:02:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-28 02:02:29,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2024-06-28 02:02:29,228 INFO L175 Difference]: Start difference. First operand has 184 places, 236 transitions, 3689 flow. Second operand 10 states and 256 transitions. [2024-06-28 02:02:29,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 326 transitions, 4684 flow [2024-06-28 02:02:29,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 4473 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 02:02:29,527 INFO L231 Difference]: Finished difference. Result has 187 places, 237 transitions, 3732 flow [2024-06-28 02:02:29,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3732, PETRI_PLACES=187, PETRI_TRANSITIONS=237} [2024-06-28 02:02:29,528 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-28 02:02:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 237 transitions, 3732 flow [2024-06-28 02:02:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:29,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:29,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:02:29,529 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:29,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1715291973, now seen corresponding path program 2 times [2024-06-28 02:02:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602260122] [2024-06-28 02:02:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602260122] [2024-06-28 02:02:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602260122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:32,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:32,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490068385] [2024-06-28 02:02:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:32,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:32,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:32,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:32,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 237 transitions, 3732 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:32,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:32,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:32,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:34,521 INFO L124 PetriNetUnfolderBase]: 6259/9662 cut-off events. [2024-06-28 02:02:34,521 INFO L125 PetriNetUnfolderBase]: For 191244/191296 co-relation queries the response was YES. [2024-06-28 02:02:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56470 conditions, 9662 events. 6259/9662 cut-off events. For 191244/191296 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 60397 event pairs, 1228 based on Foata normal form. 40/9700 useless extension candidates. Maximal degree in co-relation 56382. Up to 7938 conditions per place. [2024-06-28 02:02:34,614 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 206 selfloop transitions, 92 changer transitions 0/305 dead transitions. [2024-06-28 02:02:34,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 305 transitions, 4609 flow [2024-06-28 02:02:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:02:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:02:34,617 INFO L175 Difference]: Start difference. First operand has 187 places, 237 transitions, 3732 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:02:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 305 transitions, 4609 flow [2024-06-28 02:02:34,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 305 transitions, 4375 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:34,957 INFO L231 Difference]: Finished difference. Result has 187 places, 238 transitions, 3728 flow [2024-06-28 02:02:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3728, PETRI_PLACES=187, PETRI_TRANSITIONS=238} [2024-06-28 02:02:34,957 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-28 02:02:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 238 transitions, 3728 flow [2024-06-28 02:02:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:34,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:34,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:02:34,958 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:34,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash 393030027, now seen corresponding path program 3 times [2024-06-28 02:02:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307547070] [2024-06-28 02:02:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:37,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:37,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307547070] [2024-06-28 02:02:37,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307547070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:37,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:37,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:37,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675483972] [2024-06-28 02:02:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:37,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:37,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 238 transitions, 3728 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:40,035 INFO L124 PetriNetUnfolderBase]: 6239/9622 cut-off events. [2024-06-28 02:02:40,036 INFO L125 PetriNetUnfolderBase]: For 182327/182379 co-relation queries the response was YES. [2024-06-28 02:02:40,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55359 conditions, 9622 events. 6239/9622 cut-off events. For 182327/182379 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 59835 event pairs, 1055 based on Foata normal form. 40/9660 useless extension candidates. Maximal degree in co-relation 55270. Up to 6352 conditions per place. [2024-06-28 02:02:40,123 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 196 selfloop transitions, 102 changer transitions 0/305 dead transitions. [2024-06-28 02:02:40,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 305 transitions, 4497 flow [2024-06-28 02:02:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:02:40,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-28 02:02:40,128 INFO L175 Difference]: Start difference. First operand has 187 places, 238 transitions, 3728 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:02:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 305 transitions, 4497 flow [2024-06-28 02:02:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 305 transitions, 4285 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:40,459 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 3652 flow [2024-06-28 02:02:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3652, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-28 02:02:40,459 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-06-28 02:02:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 3652 flow [2024-06-28 02:02:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:40,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:40,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:02:40,460 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 152735002, now seen corresponding path program 1 times [2024-06-28 02:02:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414172358] [2024-06-28 02:02:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414172358] [2024-06-28 02:02:42,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414172358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:42,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:42,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:42,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575222798] [2024-06-28 02:02:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:42,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:42,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 3652 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:42,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:44,229 INFO L124 PetriNetUnfolderBase]: 6257/9933 cut-off events. [2024-06-28 02:02:44,229 INFO L125 PetriNetUnfolderBase]: For 175279/175281 co-relation queries the response was YES. [2024-06-28 02:02:44,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55715 conditions, 9933 events. 6257/9933 cut-off events. For 175279/175281 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 64621 event pairs, 1714 based on Foata normal form. 1/9932 useless extension candidates. Maximal degree in co-relation 55625. Up to 9051 conditions per place. [2024-06-28 02:02:44,306 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 241 selfloop transitions, 29 changer transitions 0/277 dead transitions. [2024-06-28 02:02:44,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 277 transitions, 4586 flow [2024-06-28 02:02:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:02:44,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-06-28 02:02:44,308 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 3652 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:02:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 277 transitions, 4586 flow [2024-06-28 02:02:44,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 277 transitions, 4264 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:44,596 INFO L231 Difference]: Finished difference. Result has 187 places, 249 transitions, 3592 flow [2024-06-28 02:02:44,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3592, PETRI_PLACES=187, PETRI_TRANSITIONS=249} [2024-06-28 02:02:44,597 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-28 02:02:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 249 transitions, 3592 flow [2024-06-28 02:02:44,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:44,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:44,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:44,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:02:44,598 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1356553702, now seen corresponding path program 2 times [2024-06-28 02:02:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407503961] [2024-06-28 02:02:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:46,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407503961] [2024-06-28 02:02:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407503961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:46,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388713435] [2024-06-28 02:02:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:46,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:46,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 249 transitions, 3592 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:46,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:46,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:46,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:48,113 INFO L124 PetriNetUnfolderBase]: 6275/9971 cut-off events. [2024-06-28 02:02:48,113 INFO L125 PetriNetUnfolderBase]: For 169078/169080 co-relation queries the response was YES. [2024-06-28 02:02:48,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54275 conditions, 9971 events. 6275/9971 cut-off events. For 169078/169080 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 64989 event pairs, 1701 based on Foata normal form. 1/9971 useless extension candidates. Maximal degree in co-relation 54185. Up to 9100 conditions per place. [2024-06-28 02:02:48,212 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 251 selfloop transitions, 26 changer transitions 0/284 dead transitions. [2024-06-28 02:02:48,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 284 transitions, 4370 flow [2024-06-28 02:02:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 02:02:48,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-28 02:02:48,213 INFO L175 Difference]: Start difference. First operand has 187 places, 249 transitions, 3592 flow. Second operand 6 states and 146 transitions. [2024-06-28 02:02:48,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 284 transitions, 4370 flow [2024-06-28 02:02:48,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 284 transitions, 4262 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-28 02:02:48,551 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 3626 flow [2024-06-28 02:02:48,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3626, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-28 02:02:48,552 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-28 02:02:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 3626 flow [2024-06-28 02:02:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:48,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:48,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:48,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:02:48,553 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:48,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 60496027, now seen corresponding path program 1 times [2024-06-28 02:02:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552561045] [2024-06-28 02:02:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552561045] [2024-06-28 02:02:51,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552561045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:51,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:51,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:02:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352131639] [2024-06-28 02:02:51,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:02:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:02:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:02:51,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:02:51,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 3626 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:51,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:51,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:02:51,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:53,328 INFO L124 PetriNetUnfolderBase]: 6159/9638 cut-off events. [2024-06-28 02:02:53,328 INFO L125 PetriNetUnfolderBase]: For 170081/170177 co-relation queries the response was YES. [2024-06-28 02:02:53,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53961 conditions, 9638 events. 6159/9638 cut-off events. For 170081/170177 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 61761 event pairs, 1126 based on Foata normal form. 85/9658 useless extension candidates. Maximal degree in co-relation 53867. Up to 8457 conditions per place. [2024-06-28 02:02:53,429 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 233 selfloop transitions, 78 changer transitions 0/330 dead transitions. [2024-06-28 02:02:53,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 330 transitions, 4810 flow [2024-06-28 02:02:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:02:53,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:02:53,431 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 3626 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:02:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 330 transitions, 4810 flow [2024-06-28 02:02:53,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 330 transitions, 4760 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:53,809 INFO L231 Difference]: Finished difference. Result has 198 places, 279 transitions, 4089 flow [2024-06-28 02:02:53,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4089, PETRI_PLACES=198, PETRI_TRANSITIONS=279} [2024-06-28 02:02:53,809 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-28 02:02:53,810 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 279 transitions, 4089 flow [2024-06-28 02:02:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:53,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:53,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:53,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:02:53,810 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash 896337893, now seen corresponding path program 2 times [2024-06-28 02:02:53,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:53,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785964548] [2024-06-28 02:02:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:53,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785964548] [2024-06-28 02:02:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785964548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:56,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:02:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424420120] [2024-06-28 02:02:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:02:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:02:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:02:56,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:02:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 279 transitions, 4089 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:56,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:56,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:02:56,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:58,162 INFO L124 PetriNetUnfolderBase]: 6144/9615 cut-off events. [2024-06-28 02:02:58,162 INFO L125 PetriNetUnfolderBase]: For 181476/181574 co-relation queries the response was YES. [2024-06-28 02:02:58,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55732 conditions, 9615 events. 6144/9615 cut-off events. For 181476/181574 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 61617 event pairs, 1162 based on Foata normal form. 91/9629 useless extension candidates. Maximal degree in co-relation 55636. Up to 8373 conditions per place. [2024-06-28 02:02:58,263 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 220 selfloop transitions, 77 changer transitions 0/316 dead transitions. [2024-06-28 02:02:58,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 316 transitions, 4943 flow [2024-06-28 02:02:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:02:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-28 02:02:58,266 INFO L175 Difference]: Start difference. First operand has 198 places, 279 transitions, 4089 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:02:58,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 316 transitions, 4943 flow [2024-06-28 02:02:58,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 316 transitions, 4877 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 02:02:58,677 INFO L231 Difference]: Finished difference. Result has 203 places, 286 transitions, 4295 flow [2024-06-28 02:02:58,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4295, PETRI_PLACES=203, PETRI_TRANSITIONS=286} [2024-06-28 02:02:58,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2024-06-28 02:02:58,678 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 286 transitions, 4295 flow [2024-06-28 02:02:58,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:58,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:58,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:02:58,678 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:58,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash 914200403, now seen corresponding path program 3 times [2024-06-28 02:02:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148060938] [2024-06-28 02:02:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:01,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:01,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148060938] [2024-06-28 02:03:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148060938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:01,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:01,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284881601] [2024-06-28 02:03:01,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:01,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:01,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:01,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:01,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 286 transitions, 4295 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:01,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:01,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:03,254 INFO L124 PetriNetUnfolderBase]: 6134/9619 cut-off events. [2024-06-28 02:03:03,254 INFO L125 PetriNetUnfolderBase]: For 189517/189613 co-relation queries the response was YES. [2024-06-28 02:03:03,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57138 conditions, 9619 events. 6134/9619 cut-off events. For 189517/189613 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 61876 event pairs, 1152 based on Foata normal form. 85/9637 useless extension candidates. Maximal degree in co-relation 57039. Up to 8449 conditions per place. [2024-06-28 02:03:03,359 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 227 selfloop transitions, 74 changer transitions 0/320 dead transitions. [2024-06-28 02:03:03,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 320 transitions, 5003 flow [2024-06-28 02:03:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-28 02:03:03,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:03:03,360 INFO L175 Difference]: Start difference. First operand has 203 places, 286 transitions, 4295 flow. Second operand 6 states and 153 transitions. [2024-06-28 02:03:03,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 320 transitions, 5003 flow [2024-06-28 02:03:03,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 320 transitions, 4883 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 02:03:03,776 INFO L231 Difference]: Finished difference. Result has 207 places, 286 transitions, 4347 flow [2024-06-28 02:03:03,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4347, PETRI_PLACES=207, PETRI_TRANSITIONS=286} [2024-06-28 02:03:03,777 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-28 02:03:03,777 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 286 transitions, 4347 flow [2024-06-28 02:03:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:03,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:03,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:03:03,777 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:03,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 825998925, now seen corresponding path program 1 times [2024-06-28 02:03:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339166492] [2024-06-28 02:03:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339166492] [2024-06-28 02:03:05,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339166492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:05,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:05,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:03:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715333656] [2024-06-28 02:03:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:05,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:03:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:05,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:03:05,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:03:05,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:05,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 286 transitions, 4347 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:05,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:05,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:05,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:07,664 INFO L124 PetriNetUnfolderBase]: 6598/10473 cut-off events. [2024-06-28 02:03:07,664 INFO L125 PetriNetUnfolderBase]: For 202039/202045 co-relation queries the response was YES. [2024-06-28 02:03:07,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60297 conditions, 10473 events. 6598/10473 cut-off events. For 202039/202045 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 68556 event pairs, 1749 based on Foata normal form. 5/10477 useless extension candidates. Maximal degree in co-relation 60196. Up to 9503 conditions per place. [2024-06-28 02:03:07,762 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 275 selfloop transitions, 35 changer transitions 0/317 dead transitions. [2024-06-28 02:03:07,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 317 transitions, 5189 flow [2024-06-28 02:03:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 02:03:07,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2024-06-28 02:03:07,764 INFO L175 Difference]: Start difference. First operand has 207 places, 286 transitions, 4347 flow. Second operand 6 states and 142 transitions. [2024-06-28 02:03:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 317 transitions, 5189 flow [2024-06-28 02:03:08,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 317 transitions, 5035 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:03:08,127 INFO L231 Difference]: Finished difference. Result has 208 places, 290 transitions, 4332 flow [2024-06-28 02:03:08,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4332, PETRI_PLACES=208, PETRI_TRANSITIONS=290} [2024-06-28 02:03:08,128 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 157 predicate places. [2024-06-28 02:03:08,128 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 290 transitions, 4332 flow [2024-06-28 02:03:08,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:08,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:08,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:03:08,128 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:08,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash 469370447, now seen corresponding path program 2 times [2024-06-28 02:03:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:08,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170682569] [2024-06-28 02:03:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170682569] [2024-06-28 02:03:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170682569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:10,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:10,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696720245] [2024-06-28 02:03:10,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:10,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:10,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:10,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 290 transitions, 4332 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:10,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:10,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:10,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:12,613 INFO L124 PetriNetUnfolderBase]: 6595/10457 cut-off events. [2024-06-28 02:03:12,613 INFO L125 PetriNetUnfolderBase]: For 202509/202511 co-relation queries the response was YES. [2024-06-28 02:03:12,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59927 conditions, 10457 events. 6595/10457 cut-off events. For 202509/202511 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 68279 event pairs, 1749 based on Foata normal form. 1/10456 useless extension candidates. Maximal degree in co-relation 59825. Up to 9500 conditions per place. [2024-06-28 02:03:12,705 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 37 changer transitions 0/322 dead transitions. [2024-06-28 02:03:12,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 322 transitions, 5138 flow [2024-06-28 02:03:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:03:12,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-06-28 02:03:12,707 INFO L175 Difference]: Start difference. First operand has 208 places, 290 transitions, 4332 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:03:12,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 322 transitions, 5138 flow [2024-06-28 02:03:12,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 5011 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:12,997 INFO L231 Difference]: Finished difference. Result has 211 places, 290 transitions, 4286 flow [2024-06-28 02:03:12,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4205, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=211, PETRI_TRANSITIONS=290} [2024-06-28 02:03:12,997 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-28 02:03:12,998 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 290 transitions, 4286 flow [2024-06-28 02:03:12,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:12,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:12,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:03:12,998 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:12,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1909088179, now seen corresponding path program 1 times [2024-06-28 02:03:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390659924] [2024-06-28 02:03:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390659924] [2024-06-28 02:03:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390659924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814183995] [2024-06-28 02:03:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:14,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:14,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 290 transitions, 4286 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:14,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:14,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:17,352 INFO L124 PetriNetUnfolderBase]: 6631/10448 cut-off events. [2024-06-28 02:03:17,353 INFO L125 PetriNetUnfolderBase]: For 209062/209064 co-relation queries the response was YES. [2024-06-28 02:03:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60265 conditions, 10448 events. 6631/10448 cut-off events. For 209062/209064 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 67567 event pairs, 1746 based on Foata normal form. 2/10448 useless extension candidates. Maximal degree in co-relation 60163. Up to 9403 conditions per place. [2024-06-28 02:03:17,467 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 283 selfloop transitions, 48 changer transitions 0/338 dead transitions. [2024-06-28 02:03:17,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 338 transitions, 5408 flow [2024-06-28 02:03:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:03:17,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-28 02:03:17,469 INFO L175 Difference]: Start difference. First operand has 211 places, 290 transitions, 4286 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:03:17,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 338 transitions, 5408 flow [2024-06-28 02:03:17,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 338 transitions, 5280 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:03:17,893 INFO L231 Difference]: Finished difference. Result has 212 places, 302 transitions, 4490 flow [2024-06-28 02:03:17,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4490, PETRI_PLACES=212, PETRI_TRANSITIONS=302} [2024-06-28 02:03:17,894 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2024-06-28 02:03:17,894 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 302 transitions, 4490 flow [2024-06-28 02:03:17,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:17,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:17,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:17,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:03:17,895 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:17,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 919747295, now seen corresponding path program 2 times [2024-06-28 02:03:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992293406] [2024-06-28 02:03:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992293406] [2024-06-28 02:03:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992293406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:19,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:19,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419823514] [2024-06-28 02:03:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:19,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:19,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 302 transitions, 4490 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:19,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:19,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:19,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:22,087 INFO L124 PetriNetUnfolderBase]: 6709/10584 cut-off events. [2024-06-28 02:03:22,087 INFO L125 PetriNetUnfolderBase]: For 223851/223853 co-relation queries the response was YES. [2024-06-28 02:03:22,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62728 conditions, 10584 events. 6709/10584 cut-off events. For 223851/223853 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 68614 event pairs, 1716 based on Foata normal form. 2/10585 useless extension candidates. Maximal degree in co-relation 62625. Up to 9558 conditions per place. [2024-06-28 02:03:22,198 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 304 selfloop transitions, 40 changer transitions 0/351 dead transitions. [2024-06-28 02:03:22,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 351 transitions, 5611 flow [2024-06-28 02:03:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:03:22,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-28 02:03:22,200 INFO L175 Difference]: Start difference. First operand has 212 places, 302 transitions, 4490 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:03:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 351 transitions, 5611 flow [2024-06-28 02:03:22,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 351 transitions, 5508 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 02:03:22,551 INFO L231 Difference]: Finished difference. Result has 218 places, 310 transitions, 4638 flow [2024-06-28 02:03:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4638, PETRI_PLACES=218, PETRI_TRANSITIONS=310} [2024-06-28 02:03:22,552 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 167 predicate places. [2024-06-28 02:03:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 310 transitions, 4638 flow [2024-06-28 02:03:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:22,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:22,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:03:22,552 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1746833775, now seen corresponding path program 3 times [2024-06-28 02:03:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283960692] [2024-06-28 02:03:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283960692] [2024-06-28 02:03:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283960692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:03:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034728899] [2024-06-28 02:03:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:03:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:03:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:03:24,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:24,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 310 transitions, 4638 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:24,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:24,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:24,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:26,395 INFO L124 PetriNetUnfolderBase]: 6706/10580 cut-off events. [2024-06-28 02:03:26,395 INFO L125 PetriNetUnfolderBase]: For 223536/223538 co-relation queries the response was YES. [2024-06-28 02:03:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62299 conditions, 10580 events. 6706/10580 cut-off events. For 223536/223538 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 68758 event pairs, 1738 based on Foata normal form. 1/10580 useless extension candidates. Maximal degree in co-relation 62192. Up to 9682 conditions per place. [2024-06-28 02:03:26,499 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 307 selfloop transitions, 26 changer transitions 0/340 dead transitions. [2024-06-28 02:03:26,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 340 transitions, 5390 flow [2024-06-28 02:03:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:03:26,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-28 02:03:26,500 INFO L175 Difference]: Start difference. First operand has 218 places, 310 transitions, 4638 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:03:26,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 340 transitions, 5390 flow [2024-06-28 02:03:27,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 340 transitions, 5257 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:27,022 INFO L231 Difference]: Finished difference. Result has 220 places, 310 transitions, 4569 flow [2024-06-28 02:03:27,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4505, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4569, PETRI_PLACES=220, PETRI_TRANSITIONS=310} [2024-06-28 02:03:27,023 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-06-28 02:03:27,023 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 310 transitions, 4569 flow [2024-06-28 02:03:27,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:27,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:27,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:03:27,023 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:27,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1746840471, now seen corresponding path program 3 times [2024-06-28 02:03:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:27,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428272808] [2024-06-28 02:03:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:29,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428272808] [2024-06-28 02:03:29,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428272808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:29,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:29,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:29,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711511192] [2024-06-28 02:03:29,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:29,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:29,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 310 transitions, 4569 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:29,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:29,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:29,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:31,546 INFO L124 PetriNetUnfolderBase]: 6700/10560 cut-off events. [2024-06-28 02:03:31,546 INFO L125 PetriNetUnfolderBase]: For 226976/226978 co-relation queries the response was YES. [2024-06-28 02:03:31,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61928 conditions, 10560 events. 6700/10560 cut-off events. For 226976/226978 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68402 event pairs, 1707 based on Foata normal form. 2/10561 useless extension candidates. Maximal degree in co-relation 61820. Up to 9553 conditions per place. [2024-06-28 02:03:31,641 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 304 selfloop transitions, 39 changer transitions 0/350 dead transitions. [2024-06-28 02:03:31,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 350 transitions, 5459 flow [2024-06-28 02:03:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:03:31,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-06-28 02:03:31,643 INFO L175 Difference]: Start difference. First operand has 220 places, 310 transitions, 4569 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:03:31,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 350 transitions, 5459 flow [2024-06-28 02:03:32,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 350 transitions, 5366 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:32,147 INFO L231 Difference]: Finished difference. Result has 222 places, 310 transitions, 4563 flow [2024-06-28 02:03:32,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4563, PETRI_PLACES=222, PETRI_TRANSITIONS=310} [2024-06-28 02:03:32,147 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 171 predicate places. [2024-06-28 02:03:32,147 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 310 transitions, 4563 flow [2024-06-28 02:03:32,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:32,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:32,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:03:32,148 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:32,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash 896756393, now seen corresponding path program 1 times [2024-06-28 02:03:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:32,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553020927] [2024-06-28 02:03:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553020927] [2024-06-28 02:03:34,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553020927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:03:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583028359] [2024-06-28 02:03:34,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:34,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:03:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:03:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:03:35,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:35,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 310 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:35,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:35,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:35,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:37,332 INFO L124 PetriNetUnfolderBase]: 6238/9903 cut-off events. [2024-06-28 02:03:37,332 INFO L125 PetriNetUnfolderBase]: For 221674/221790 co-relation queries the response was YES. [2024-06-28 02:03:37,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58536 conditions, 9903 events. 6238/9903 cut-off events. For 221674/221790 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 64919 event pairs, 1586 based on Foata normal form. 103/9936 useless extension candidates. Maximal degree in co-relation 58428. Up to 8947 conditions per place. [2024-06-28 02:03:37,449 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 301 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-28 02:03:37,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 337 transitions, 5317 flow [2024-06-28 02:03:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 02:03:37,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:03:37,451 INFO L175 Difference]: Start difference. First operand has 222 places, 310 transitions, 4563 flow. Second operand 6 states and 141 transitions. [2024-06-28 02:03:37,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 337 transitions, 5317 flow [2024-06-28 02:03:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 337 transitions, 5207 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:37,951 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 4551 flow [2024-06-28 02:03:37,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4453, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4551, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-06-28 02:03:37,952 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 171 predicate places. [2024-06-28 02:03:37,952 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 4551 flow [2024-06-28 02:03:37,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:37,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:37,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:03:37,953 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:37,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1869657129, now seen corresponding path program 1 times [2024-06-28 02:03:37,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375303482] [2024-06-28 02:03:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375303482] [2024-06-28 02:03:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375303482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:40,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:40,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477673763] [2024-06-28 02:03:40,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:40,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:40,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 4551 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:40,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:40,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:40,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:43,246 INFO L124 PetriNetUnfolderBase]: 6744/10383 cut-off events. [2024-06-28 02:03:43,246 INFO L125 PetriNetUnfolderBase]: For 229328/229338 co-relation queries the response was YES. [2024-06-28 02:03:43,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62482 conditions, 10383 events. 6744/10383 cut-off events. For 229328/229338 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 65290 event pairs, 1205 based on Foata normal form. 11/10391 useless extension candidates. Maximal degree in co-relation 62373. Up to 9213 conditions per place. [2024-06-28 02:03:43,365 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 300 selfloop transitions, 71 changer transitions 0/378 dead transitions. [2024-06-28 02:03:43,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 378 transitions, 5932 flow [2024-06-28 02:03:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:03:43,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:03:43,367 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 4551 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:03:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 378 transitions, 5932 flow [2024-06-28 02:03:43,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 378 transitions, 5865 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-28 02:03:43,874 INFO L231 Difference]: Finished difference. Result has 228 places, 325 transitions, 4885 flow [2024-06-28 02:03:43,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4885, PETRI_PLACES=228, PETRI_TRANSITIONS=325} [2024-06-28 02:03:43,875 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 177 predicate places. [2024-06-28 02:03:43,875 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 325 transitions, 4885 flow [2024-06-28 02:03:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:43,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:43,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:03:43,875 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:43,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash -254026889, now seen corresponding path program 2 times [2024-06-28 02:03:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447625251] [2024-06-28 02:03:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:46,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447625251] [2024-06-28 02:03:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447625251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:46,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856562909] [2024-06-28 02:03:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:46,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:46,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 325 transitions, 4885 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:46,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:46,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:46,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:49,151 INFO L124 PetriNetUnfolderBase]: 6873/10627 cut-off events. [2024-06-28 02:03:49,151 INFO L125 PetriNetUnfolderBase]: For 245546/245548 co-relation queries the response was YES. [2024-06-28 02:03:49,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66005 conditions, 10627 events. 6873/10627 cut-off events. For 245546/245548 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 67167 event pairs, 1216 based on Foata normal form. 1/10627 useless extension candidates. Maximal degree in co-relation 65892. Up to 9503 conditions per place. [2024-06-28 02:03:49,271 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 301 selfloop transitions, 88 changer transitions 0/396 dead transitions. [2024-06-28 02:03:49,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 396 transitions, 6269 flow [2024-06-28 02:03:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:03:49,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:03:49,272 INFO L175 Difference]: Start difference. First operand has 228 places, 325 transitions, 4885 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:03:49,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 396 transitions, 6269 flow [2024-06-28 02:03:49,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 396 transitions, 6183 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-28 02:03:49,852 INFO L231 Difference]: Finished difference. Result has 236 places, 343 transitions, 5311 flow [2024-06-28 02:03:49,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5311, PETRI_PLACES=236, PETRI_TRANSITIONS=343} [2024-06-28 02:03:49,853 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 185 predicate places. [2024-06-28 02:03:49,853 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 343 transitions, 5311 flow [2024-06-28 02:03:49,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:49,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:49,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:03:49,854 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:49,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash 936369015, now seen corresponding path program 3 times [2024-06-28 02:03:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:49,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46854166] [2024-06-28 02:03:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:52,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46854166] [2024-06-28 02:03:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46854166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:52,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:52,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:52,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592254870] [2024-06-28 02:03:52,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:52,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 343 transitions, 5311 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:55,119 INFO L124 PetriNetUnfolderBase]: 7017/10789 cut-off events. [2024-06-28 02:03:55,119 INFO L125 PetriNetUnfolderBase]: For 270836/270846 co-relation queries the response was YES. [2024-06-28 02:03:55,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68243 conditions, 10789 events. 7017/10789 cut-off events. For 270836/270846 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 67953 event pairs, 1385 based on Foata normal form. 9/10795 useless extension candidates. Maximal degree in co-relation 68126. Up to 9630 conditions per place. [2024-06-28 02:03:55,246 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 331 selfloop transitions, 82 changer transitions 0/420 dead transitions. [2024-06-28 02:03:55,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 420 transitions, 7147 flow [2024-06-28 02:03:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:03:55,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-28 02:03:55,248 INFO L175 Difference]: Start difference. First operand has 236 places, 343 transitions, 5311 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:03:55,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 420 transitions, 7147 flow [2024-06-28 02:03:56,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 420 transitions, 6899 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 02:03:56,025 INFO L231 Difference]: Finished difference. Result has 241 places, 371 transitions, 5869 flow [2024-06-28 02:03:56,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5869, PETRI_PLACES=241, PETRI_TRANSITIONS=371} [2024-06-28 02:03:56,026 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2024-06-28 02:03:56,026 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 371 transitions, 5869 flow [2024-06-28 02:03:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:56,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:56,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:56,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:03:56,026 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:56,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash -115521989, now seen corresponding path program 4 times [2024-06-28 02:03:56,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:56,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748570478] [2024-06-28 02:03:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748570478] [2024-06-28 02:03:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748570478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448763018] [2024-06-28 02:03:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:58,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:58,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 371 transitions, 5869 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:58,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:58,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:58,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:01,134 INFO L124 PetriNetUnfolderBase]: 7045/10848 cut-off events. [2024-06-28 02:04:01,135 INFO L125 PetriNetUnfolderBase]: For 276053/276067 co-relation queries the response was YES. [2024-06-28 02:04:01,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69266 conditions, 10848 events. 7045/10848 cut-off events. For 276053/276067 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 68541 event pairs, 1293 based on Foata normal form. 15/10859 useless extension candidates. Maximal degree in co-relation 69146. Up to 9500 conditions per place. [2024-06-28 02:04:01,263 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 307 selfloop transitions, 108 changer transitions 0/422 dead transitions. [2024-06-28 02:04:01,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 422 transitions, 7249 flow [2024-06-28 02:04:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:04:01,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-28 02:04:01,265 INFO L175 Difference]: Start difference. First operand has 241 places, 371 transitions, 5869 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:04:01,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 422 transitions, 7249 flow [2024-06-28 02:04:02,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 422 transitions, 7154 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-28 02:04:02,105 INFO L231 Difference]: Finished difference. Result has 247 places, 377 transitions, 6162 flow [2024-06-28 02:04:02,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6162, PETRI_PLACES=247, PETRI_TRANSITIONS=377} [2024-06-28 02:04:02,106 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-28 02:04:02,106 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 377 transitions, 6162 flow [2024-06-28 02:04:02,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:02,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:02,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:04:02,107 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:02,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2016290329, now seen corresponding path program 5 times [2024-06-28 02:04:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641193021] [2024-06-28 02:04:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:02,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641193021] [2024-06-28 02:04:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641193021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260449956] [2024-06-28 02:04:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:04,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:04,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 377 transitions, 6162 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:04,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:04,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:07,694 INFO L124 PetriNetUnfolderBase]: 7073/10937 cut-off events. [2024-06-28 02:04:07,695 INFO L125 PetriNetUnfolderBase]: For 279007/279009 co-relation queries the response was YES. [2024-06-28 02:04:07,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70419 conditions, 10937 events. 7073/10937 cut-off events. For 279007/279009 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 69427 event pairs, 1213 based on Foata normal form. 1/10937 useless extension candidates. Maximal degree in co-relation 70296. Up to 9165 conditions per place. [2024-06-28 02:04:07,829 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 263 selfloop transitions, 173 changer transitions 0/443 dead transitions. [2024-06-28 02:04:07,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 443 transitions, 7470 flow [2024-06-28 02:04:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:04:07,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-28 02:04:07,831 INFO L175 Difference]: Start difference. First operand has 247 places, 377 transitions, 6162 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:04:07,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 443 transitions, 7470 flow [2024-06-28 02:04:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 443 transitions, 7297 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-28 02:04:08,639 INFO L231 Difference]: Finished difference. Result has 255 places, 383 transitions, 6618 flow [2024-06-28 02:04:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6618, PETRI_PLACES=255, PETRI_TRANSITIONS=383} [2024-06-28 02:04:08,639 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-28 02:04:08,639 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 383 transitions, 6618 flow [2024-06-28 02:04:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:04:08,640 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:08,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2022004249, now seen corresponding path program 6 times [2024-06-28 02:04:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:08,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148345169] [2024-06-28 02:04:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148345169] [2024-06-28 02:04:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148345169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:10,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396917169] [2024-06-28 02:04:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:10,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:10,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 383 transitions, 6618 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:10,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:10,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:10,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:13,725 INFO L124 PetriNetUnfolderBase]: 7070/10897 cut-off events. [2024-06-28 02:04:13,725 INFO L125 PetriNetUnfolderBase]: For 293163/293175 co-relation queries the response was YES. [2024-06-28 02:04:13,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71776 conditions, 10897 events. 7070/10897 cut-off events. For 293163/293175 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68865 event pairs, 1243 based on Foata normal form. 3/10899 useless extension candidates. Maximal degree in co-relation 71649. Up to 9163 conditions per place. [2024-06-28 02:04:13,836 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 254 selfloop transitions, 170 changer transitions 0/431 dead transitions. [2024-06-28 02:04:13,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 431 transitions, 7774 flow [2024-06-28 02:04:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:04:13,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501519756838906 [2024-06-28 02:04:13,838 INFO L175 Difference]: Start difference. First operand has 255 places, 383 transitions, 6618 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:04:13,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 431 transitions, 7774 flow [2024-06-28 02:04:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 431 transitions, 7439 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 02:04:14,688 INFO L231 Difference]: Finished difference. Result has 256 places, 383 transitions, 6637 flow [2024-06-28 02:04:14,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6637, PETRI_PLACES=256, PETRI_TRANSITIONS=383} [2024-06-28 02:04:14,689 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-28 02:04:14,689 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 383 transitions, 6637 flow [2024-06-28 02:04:14,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:14,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:14,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:14,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:04:14,689 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:14,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -163834984, now seen corresponding path program 1 times [2024-06-28 02:04:14,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:14,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453904523] [2024-06-28 02:04:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:14,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:16,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:16,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453904523] [2024-06-28 02:04:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453904523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396420201] [2024-06-28 02:04:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:16,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:16,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 383 transitions, 6637 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:16,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:16,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:16,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:19,603 INFO L124 PetriNetUnfolderBase]: 7106/11191 cut-off events. [2024-06-28 02:04:19,603 INFO L125 PetriNetUnfolderBase]: For 311723/311729 co-relation queries the response was YES. [2024-06-28 02:04:19,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72360 conditions, 11191 events. 7106/11191 cut-off events. For 311723/311729 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 73076 event pairs, 1823 based on Foata normal form. 6/11196 useless extension candidates. Maximal degree in co-relation 72233. Up to 9986 conditions per place. [2024-06-28 02:04:19,745 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 358 selfloop transitions, 57 changer transitions 0/422 dead transitions. [2024-06-28 02:04:19,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 422 transitions, 7735 flow [2024-06-28 02:04:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:04:19,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-28 02:04:19,746 INFO L175 Difference]: Start difference. First operand has 256 places, 383 transitions, 6637 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:04:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 422 transitions, 7735 flow [2024-06-28 02:04:20,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 422 transitions, 7530 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:20,575 INFO L231 Difference]: Finished difference. Result has 258 places, 387 transitions, 6621 flow [2024-06-28 02:04:20,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6621, PETRI_PLACES=258, PETRI_TRANSITIONS=387} [2024-06-28 02:04:20,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 207 predicate places. [2024-06-28 02:04:20,576 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 387 transitions, 6621 flow [2024-06-28 02:04:20,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:20,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:20,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:20,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:04:20,577 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:20,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1665589666, now seen corresponding path program 2 times [2024-06-28 02:04:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:20,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746923974] [2024-06-28 02:04:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:20,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746923974] [2024-06-28 02:04:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746923974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:22,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:22,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119499756] [2024-06-28 02:04:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:22,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:22,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:22,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:22,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 387 transitions, 6621 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:22,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:22,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:22,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:26,685 INFO L124 PetriNetUnfolderBase]: 7142/11218 cut-off events. [2024-06-28 02:04:26,686 INFO L125 PetriNetUnfolderBase]: For 308391/308393 co-relation queries the response was YES. [2024-06-28 02:04:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72134 conditions, 11218 events. 7142/11218 cut-off events. For 308391/308393 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72874 event pairs, 1809 based on Foata normal form. 2/11218 useless extension candidates. Maximal degree in co-relation 72007. Up to 10018 conditions per place. [2024-06-28 02:04:26,810 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 372 selfloop transitions, 65 changer transitions 0/444 dead transitions. [2024-06-28 02:04:26,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 444 transitions, 7925 flow [2024-06-28 02:04:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:04:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:04:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-28 02:04:26,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-28 02:04:26,811 INFO L175 Difference]: Start difference. First operand has 258 places, 387 transitions, 6621 flow. Second operand 10 states and 230 transitions. [2024-06-28 02:04:26,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 444 transitions, 7925 flow [2024-06-28 02:04:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 444 transitions, 7732 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:27,551 INFO L231 Difference]: Finished difference. Result has 263 places, 391 transitions, 6639 flow [2024-06-28 02:04:27,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6442, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6639, PETRI_PLACES=263, PETRI_TRANSITIONS=391} [2024-06-28 02:04:27,552 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-28 02:04:27,552 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 391 transitions, 6639 flow [2024-06-28 02:04:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:27,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:27,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:27,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:04:27,552 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:27,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:27,553 INFO L85 PathProgramCache]: Analyzing trace with hash -160115914, now seen corresponding path program 3 times [2024-06-28 02:04:27,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:27,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799217195] [2024-06-28 02:04:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:27,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799217195] [2024-06-28 02:04:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799217195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:29,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:29,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:29,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149287606] [2024-06-28 02:04:29,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:29,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:29,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 391 transitions, 6639 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:29,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:29,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:29,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:33,309 INFO L124 PetriNetUnfolderBase]: 7136/11201 cut-off events. [2024-06-28 02:04:33,310 INFO L125 PetriNetUnfolderBase]: For 309441/309443 co-relation queries the response was YES. [2024-06-28 02:04:33,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71894 conditions, 11201 events. 7136/11201 cut-off events. For 309441/309443 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 72718 event pairs, 1806 based on Foata normal form. 2/11201 useless extension candidates. Maximal degree in co-relation 71767. Up to 10013 conditions per place. [2024-06-28 02:04:33,456 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 362 selfloop transitions, 64 changer transitions 0/433 dead transitions. [2024-06-28 02:04:33,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 433 transitions, 7713 flow [2024-06-28 02:04:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:04:33,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-28 02:04:33,458 INFO L175 Difference]: Start difference. First operand has 263 places, 391 transitions, 6639 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:04:33,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 433 transitions, 7713 flow [2024-06-28 02:04:34,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 433 transitions, 7443 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-28 02:04:34,146 INFO L231 Difference]: Finished difference. Result has 261 places, 391 transitions, 6504 flow [2024-06-28 02:04:34,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6504, PETRI_PLACES=261, PETRI_TRANSITIONS=391} [2024-06-28 02:04:34,147 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-28 02:04:34,147 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 391 transitions, 6504 flow [2024-06-28 02:04:34,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:34,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:34,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:34,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:04:34,147 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:34,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2022012340, now seen corresponding path program 4 times [2024-06-28 02:04:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:34,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613570032] [2024-06-28 02:04:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:36,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:36,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613570032] [2024-06-28 02:04:36,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613570032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:36,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:36,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:36,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046622928] [2024-06-28 02:04:36,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:36,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:36,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:36,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:36,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 391 transitions, 6504 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:36,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:36,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:36,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:38,910 INFO L124 PetriNetUnfolderBase]: 7172/11282 cut-off events. [2024-06-28 02:04:38,910 INFO L125 PetriNetUnfolderBase]: For 311949/311951 co-relation queries the response was YES. [2024-06-28 02:04:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71754 conditions, 11282 events. 7172/11282 cut-off events. For 311949/311951 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 73506 event pairs, 1762 based on Foata normal form. 2/11283 useless extension candidates. Maximal degree in co-relation 71628. Up to 10210 conditions per place. [2024-06-28 02:04:39,069 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 387 selfloop transitions, 38 changer transitions 0/432 dead transitions. [2024-06-28 02:04:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 432 transitions, 7612 flow [2024-06-28 02:04:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:04:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:04:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 02:04:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458628841607565 [2024-06-28 02:04:39,070 INFO L175 Difference]: Start difference. First operand has 261 places, 391 transitions, 6504 flow. Second operand 9 states and 194 transitions. [2024-06-28 02:04:39,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 432 transitions, 7612 flow [2024-06-28 02:04:40,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 432 transitions, 7472 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:04:40,161 INFO L231 Difference]: Finished difference. Result has 263 places, 395 transitions, 6495 flow [2024-06-28 02:04:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6495, PETRI_PLACES=263, PETRI_TRANSITIONS=395} [2024-06-28 02:04:40,161 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-28 02:04:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 395 transitions, 6495 flow [2024-06-28 02:04:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:04:40,162 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:40,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash -16219804, now seen corresponding path program 5 times [2024-06-28 02:04:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:40,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217445782] [2024-06-28 02:04:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:42,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217445782] [2024-06-28 02:04:42,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217445782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:42,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:42,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574658400] [2024-06-28 02:04:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:42,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:42,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:42,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 395 transitions, 6495 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:42,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:42,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:45,063 INFO L124 PetriNetUnfolderBase]: 7166/11268 cut-off events. [2024-06-28 02:04:45,064 INFO L125 PetriNetUnfolderBase]: For 311086/311088 co-relation queries the response was YES. [2024-06-28 02:04:45,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70979 conditions, 11268 events. 7166/11268 cut-off events. For 311086/311088 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 73344 event pairs, 1765 based on Foata normal form. 2/11269 useless extension candidates. Maximal degree in co-relation 70852. Up to 10167 conditions per place. [2024-06-28 02:04:45,201 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 383 selfloop transitions, 44 changer transitions 0/434 dead transitions. [2024-06-28 02:04:45,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 434 transitions, 7457 flow [2024-06-28 02:04:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-28 02:04:45,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920212765957447 [2024-06-28 02:04:45,203 INFO L175 Difference]: Start difference. First operand has 263 places, 395 transitions, 6495 flow. Second operand 8 states and 185 transitions. [2024-06-28 02:04:45,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 434 transitions, 7457 flow [2024-06-28 02:04:45,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 434 transitions, 7318 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 02:04:45,982 INFO L231 Difference]: Finished difference. Result has 265 places, 395 transitions, 6452 flow [2024-06-28 02:04:45,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6452, PETRI_PLACES=265, PETRI_TRANSITIONS=395} [2024-06-28 02:04:45,983 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 214 predicate places. [2024-06-28 02:04:45,983 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 395 transitions, 6452 flow [2024-06-28 02:04:45,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:45,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:45,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:04:45,983 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash 531311384, now seen corresponding path program 1 times [2024-06-28 02:04:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918610575] [2024-06-28 02:04:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:45,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918610575] [2024-06-28 02:04:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918610575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:49,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:49,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672359889] [2024-06-28 02:04:49,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:49,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:49,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:49,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 395 transitions, 6452 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:49,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:49,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:49,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:52,349 INFO L124 PetriNetUnfolderBase]: 7215/11160 cut-off events. [2024-06-28 02:04:52,351 INFO L125 PetriNetUnfolderBase]: For 302055/302063 co-relation queries the response was YES. [2024-06-28 02:04:52,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71387 conditions, 11160 events. 7215/11160 cut-off events. For 302055/302063 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 71156 event pairs, 1215 based on Foata normal form. 9/11168 useless extension candidates. Maximal degree in co-relation 71261. Up to 9653 conditions per place. [2024-06-28 02:04:52,477 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 344 selfloop transitions, 125 changer transitions 0/476 dead transitions. [2024-06-28 02:04:52,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 476 transitions, 7905 flow [2024-06-28 02:04:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:04:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:04:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-28 02:04:52,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-28 02:04:52,478 INFO L175 Difference]: Start difference. First operand has 265 places, 395 transitions, 6452 flow. Second operand 9 states and 230 transitions. [2024-06-28 02:04:52,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 476 transitions, 7905 flow [2024-06-28 02:04:53,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 476 transitions, 7805 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:04:53,361 INFO L231 Difference]: Finished difference. Result has 268 places, 401 transitions, 6747 flow [2024-06-28 02:04:53,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6747, PETRI_PLACES=268, PETRI_TRANSITIONS=401} [2024-06-28 02:04:53,361 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 217 predicate places. [2024-06-28 02:04:53,362 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 401 transitions, 6747 flow [2024-06-28 02:04:53,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:53,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:53,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:04:53,362 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:53,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 536068334, now seen corresponding path program 2 times [2024-06-28 02:04:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:53,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237288272] [2024-06-28 02:04:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237288272] [2024-06-28 02:04:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237288272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:56,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456957963] [2024-06-28 02:04:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:56,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:56,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 401 transitions, 6747 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:56,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:56,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:56,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:59,728 INFO L124 PetriNetUnfolderBase]: 7264/11122 cut-off events. [2024-06-28 02:04:59,729 INFO L125 PetriNetUnfolderBase]: For 334673/334675 co-relation queries the response was YES. [2024-06-28 02:04:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74196 conditions, 11122 events. 7264/11122 cut-off events. For 334673/334675 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 69890 event pairs, 1342 based on Foata normal form. 1/11117 useless extension candidates. Maximal degree in co-relation 74068. Up to 8701 conditions per place. [2024-06-28 02:04:59,875 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 260 selfloop transitions, 202 changer transitions 0/469 dead transitions. [2024-06-28 02:04:59,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 469 transitions, 8337 flow [2024-06-28 02:04:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:04:59,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:04:59,877 INFO L175 Difference]: Start difference. First operand has 268 places, 401 transitions, 6747 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:04:59,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 469 transitions, 8337 flow [2024-06-28 02:05:00,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 469 transitions, 8139 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:00,854 INFO L231 Difference]: Finished difference. Result has 273 places, 410 transitions, 7306 flow [2024-06-28 02:05:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7306, PETRI_PLACES=273, PETRI_TRANSITIONS=410} [2024-06-28 02:05:00,855 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 222 predicate places. [2024-06-28 02:05:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 410 transitions, 7306 flow [2024-06-28 02:05:00,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:00,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:00,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:00,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:05:00,859 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:00,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 536074100, now seen corresponding path program 1 times [2024-06-28 02:05:00,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:00,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684858710] [2024-06-28 02:05:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:03,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684858710] [2024-06-28 02:05:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684858710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:03,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724443923] [2024-06-28 02:05:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:03,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 410 transitions, 7306 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:03,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:03,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:06,720 INFO L124 PetriNetUnfolderBase]: 7362/11336 cut-off events. [2024-06-28 02:05:06,720 INFO L125 PetriNetUnfolderBase]: For 366380/366396 co-relation queries the response was YES. [2024-06-28 02:05:06,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79296 conditions, 11336 events. 7362/11336 cut-off events. For 366380/366396 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72218 event pairs, 1243 based on Foata normal form. 16/11350 useless extension candidates. Maximal degree in co-relation 79163. Up to 9889 conditions per place. [2024-06-28 02:05:06,878 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 349 selfloop transitions, 117 changer transitions 0/473 dead transitions. [2024-06-28 02:05:06,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 473 transitions, 8939 flow [2024-06-28 02:05:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:05:06,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:05:06,880 INFO L175 Difference]: Start difference. First operand has 273 places, 410 transitions, 7306 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:05:06,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 473 transitions, 8939 flow [2024-06-28 02:05:08,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 473 transitions, 8751 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:08,148 INFO L231 Difference]: Finished difference. Result has 277 places, 422 transitions, 7624 flow [2024-06-28 02:05:08,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7118, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7624, PETRI_PLACES=277, PETRI_TRANSITIONS=422} [2024-06-28 02:05:08,151 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 226 predicate places. [2024-06-28 02:05:08,151 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 422 transitions, 7624 flow [2024-06-28 02:05:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:08,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:08,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:08,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:05:08,151 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:08,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash -738773946, now seen corresponding path program 1 times [2024-06-28 02:05:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:08,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333984864] [2024-06-28 02:05:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333984864] [2024-06-28 02:05:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333984864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:11,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308676048] [2024-06-28 02:05:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:11,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:11,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:11,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 422 transitions, 7624 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:11,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:11,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:11,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:14,513 INFO L124 PetriNetUnfolderBase]: 7564/11598 cut-off events. [2024-06-28 02:05:14,514 INFO L125 PetriNetUnfolderBase]: For 384956/384964 co-relation queries the response was YES. [2024-06-28 02:05:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80980 conditions, 11598 events. 7564/11598 cut-off events. For 384956/384964 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 73442 event pairs, 1272 based on Foata normal form. 10/11605 useless extension candidates. Maximal degree in co-relation 80845. Up to 9761 conditions per place. [2024-06-28 02:05:14,665 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 365 selfloop transitions, 142 changer transitions 0/514 dead transitions. [2024-06-28 02:05:14,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 514 transitions, 9551 flow [2024-06-28 02:05:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:05:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:05:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-28 02:05:14,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-28 02:05:14,666 INFO L175 Difference]: Start difference. First operand has 277 places, 422 transitions, 7624 flow. Second operand 10 states and 248 transitions. [2024-06-28 02:05:14,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 514 transitions, 9551 flow [2024-06-28 02:05:15,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 514 transitions, 9231 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-28 02:05:15,687 INFO L231 Difference]: Finished difference. Result has 285 places, 440 transitions, 7920 flow [2024-06-28 02:05:15,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7920, PETRI_PLACES=285, PETRI_TRANSITIONS=440} [2024-06-28 02:05:15,688 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 234 predicate places. [2024-06-28 02:05:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 440 transitions, 7920 flow [2024-06-28 02:05:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:15,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:15,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:05:15,688 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:15,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash 537971444, now seen corresponding path program 2 times [2024-06-28 02:05:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882185412] [2024-06-28 02:05:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882185412] [2024-06-28 02:05:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882185412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077180270] [2024-06-28 02:05:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:19,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:19,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:19,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 440 transitions, 7920 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:19,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:19,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:19,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:22,809 INFO L124 PetriNetUnfolderBase]: 7584/11630 cut-off events. [2024-06-28 02:05:22,809 INFO L125 PetriNetUnfolderBase]: For 408808/408816 co-relation queries the response was YES. [2024-06-28 02:05:22,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83688 conditions, 11630 events. 7584/11630 cut-off events. For 408808/408816 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 73695 event pairs, 1271 based on Foata normal form. 10/11637 useless extension candidates. Maximal degree in co-relation 83551. Up to 10182 conditions per place. [2024-06-28 02:05:22,957 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 366 selfloop transitions, 127 changer transitions 0/500 dead transitions. [2024-06-28 02:05:22,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 500 transitions, 9356 flow [2024-06-28 02:05:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:05:22,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:05:22,959 INFO L175 Difference]: Start difference. First operand has 285 places, 440 transitions, 7920 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:05:22,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 500 transitions, 9356 flow [2024-06-28 02:05:24,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 500 transitions, 9102 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-28 02:05:24,174 INFO L231 Difference]: Finished difference. Result has 289 places, 443 transitions, 7997 flow [2024-06-28 02:05:24,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7997, PETRI_PLACES=289, PETRI_TRANSITIONS=443} [2024-06-28 02:05:24,175 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-06-28 02:05:24,175 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 443 transitions, 7997 flow [2024-06-28 02:05:24,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:24,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:24,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:05:24,175 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:24,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash 537971258, now seen corresponding path program 3 times [2024-06-28 02:05:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:24,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004755028] [2024-06-28 02:05:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:24,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:27,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:27,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004755028] [2024-06-28 02:05:27,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004755028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:27,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:27,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:27,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934170337] [2024-06-28 02:05:27,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:27,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:27,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:27,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:27,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 443 transitions, 7997 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:27,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:27,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:27,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:30,647 INFO L124 PetriNetUnfolderBase]: 7607/11629 cut-off events. [2024-06-28 02:05:30,647 INFO L125 PetriNetUnfolderBase]: For 413704/413706 co-relation queries the response was YES. [2024-06-28 02:05:30,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84068 conditions, 11629 events. 7607/11629 cut-off events. For 413704/413706 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 73288 event pairs, 1378 based on Foata normal form. 1/11624 useless extension candidates. Maximal degree in co-relation 83929. Up to 9071 conditions per place. [2024-06-28 02:05:30,787 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 278 selfloop transitions, 216 changer transitions 0/501 dead transitions. [2024-06-28 02:05:30,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 501 transitions, 9567 flow [2024-06-28 02:05:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:05:30,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-28 02:05:30,788 INFO L175 Difference]: Start difference. First operand has 289 places, 443 transitions, 7997 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:05:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 501 transitions, 9567 flow [2024-06-28 02:05:32,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 501 transitions, 9267 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:32,036 INFO L231 Difference]: Finished difference. Result has 291 places, 446 transitions, 8188 flow [2024-06-28 02:05:32,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8188, PETRI_PLACES=291, PETRI_TRANSITIONS=446} [2024-06-28 02:05:32,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 240 predicate places. [2024-06-28 02:05:32,036 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 446 transitions, 8188 flow [2024-06-28 02:05:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:32,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:32,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:32,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:05:32,037 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:32,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash 542613074, now seen corresponding path program 3 times [2024-06-28 02:05:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:32,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321698015] [2024-06-28 02:05:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:34,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321698015] [2024-06-28 02:05:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321698015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:34,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:34,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:34,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781420275] [2024-06-28 02:05:34,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:34,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:34,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 446 transitions, 8188 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:34,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:34,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:37,979 INFO L124 PetriNetUnfolderBase]: 7601/11714 cut-off events. [2024-06-28 02:05:37,980 INFO L125 PetriNetUnfolderBase]: For 410002/410004 co-relation queries the response was YES. [2024-06-28 02:05:38,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84691 conditions, 11714 events. 7601/11714 cut-off events. For 410002/410004 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 74484 event pairs, 1257 based on Foata normal form. 2/11715 useless extension candidates. Maximal degree in co-relation 84551. Up to 10439 conditions per place. [2024-06-28 02:05:38,154 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 395 selfloop transitions, 96 changer transitions 0/498 dead transitions. [2024-06-28 02:05:38,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 498 transitions, 9440 flow [2024-06-28 02:05:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 02:05:38,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-28 02:05:38,155 INFO L175 Difference]: Start difference. First operand has 291 places, 446 transitions, 8188 flow. Second operand 8 states and 193 transitions. [2024-06-28 02:05:38,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 498 transitions, 9440 flow [2024-06-28 02:05:39,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 498 transitions, 9031 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:39,683 INFO L231 Difference]: Finished difference. Result has 294 places, 446 transitions, 7989 flow [2024-06-28 02:05:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7779, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7989, PETRI_PLACES=294, PETRI_TRANSITIONS=446} [2024-06-28 02:05:39,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 243 predicate places. [2024-06-28 02:05:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 446 transitions, 7989 flow [2024-06-28 02:05:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:39,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:05:39,684 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:39,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1992800358, now seen corresponding path program 2 times [2024-06-28 02:05:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742725865] [2024-06-28 02:05:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742725865] [2024-06-28 02:05:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742725865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:42,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359668345] [2024-06-28 02:05:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:42,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:42,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:42,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 446 transitions, 7989 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:42,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:42,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:42,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:46,153 INFO L124 PetriNetUnfolderBase]: 7941/12214 cut-off events. [2024-06-28 02:05:46,154 INFO L125 PetriNetUnfolderBase]: For 444700/444702 co-relation queries the response was YES. [2024-06-28 02:05:46,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88100 conditions, 12214 events. 7941/12214 cut-off events. For 444700/444702 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 77777 event pairs, 1279 based on Foata normal form. 4/12217 useless extension candidates. Maximal degree in co-relation 87959. Up to 10405 conditions per place. [2024-06-28 02:05:46,325 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 434 selfloop transitions, 126 changer transitions 0/567 dead transitions. [2024-06-28 02:05:46,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 567 transitions, 10503 flow [2024-06-28 02:05:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:05:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:05:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-28 02:05:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2024-06-28 02:05:46,327 INFO L175 Difference]: Start difference. First operand has 294 places, 446 transitions, 7989 flow. Second operand 11 states and 266 transitions. [2024-06-28 02:05:46,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 567 transitions, 10503 flow [2024-06-28 02:05:47,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 567 transitions, 10283 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:05:47,703 INFO L231 Difference]: Finished difference. Result has 300 places, 486 transitions, 8935 flow [2024-06-28 02:05:47,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7805, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8935, PETRI_PLACES=300, PETRI_TRANSITIONS=486} [2024-06-28 02:05:47,703 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 249 predicate places. [2024-06-28 02:05:47,703 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 486 transitions, 8935 flow [2024-06-28 02:05:47,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:47,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:47,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:05:47,704 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:47,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2129439526, now seen corresponding path program 4 times [2024-06-28 02:05:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962715802] [2024-06-28 02:05:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:50,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962715802] [2024-06-28 02:05:50,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962715802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:50,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079673324] [2024-06-28 02:05:50,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:50,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:50,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 486 transitions, 8935 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:50,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:50,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:50,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:54,297 INFO L124 PetriNetUnfolderBase]: 7990/12324 cut-off events. [2024-06-28 02:05:54,297 INFO L125 PetriNetUnfolderBase]: For 471445/471447 co-relation queries the response was YES. [2024-06-28 02:05:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91968 conditions, 12324 events. 7990/12324 cut-off events. For 471445/471447 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 78978 event pairs, 1302 based on Foata normal form. 1/12324 useless extension candidates. Maximal degree in co-relation 91825. Up to 10886 conditions per place. [2024-06-28 02:05:54,479 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 427 selfloop transitions, 118 changer transitions 0/552 dead transitions. [2024-06-28 02:05:54,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 552 transitions, 10602 flow [2024-06-28 02:05:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:05:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:05:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-28 02:05:54,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-06-28 02:05:54,481 INFO L175 Difference]: Start difference. First operand has 300 places, 486 transitions, 8935 flow. Second operand 9 states and 215 transitions. [2024-06-28 02:05:54,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 552 transitions, 10602 flow [2024-06-28 02:05:56,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 552 transitions, 10333 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:56,334 INFO L231 Difference]: Finished difference. Result has 305 places, 492 transitions, 9077 flow [2024-06-28 02:05:56,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8686, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9077, PETRI_PLACES=305, PETRI_TRANSITIONS=492} [2024-06-28 02:05:56,334 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 254 predicate places. [2024-06-28 02:05:56,335 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 492 transitions, 9077 flow [2024-06-28 02:05:56,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:56,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:56,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:56,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:05:56,335 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:56,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:56,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2129439898, now seen corresponding path program 3 times [2024-06-28 02:05:56,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:56,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974059370] [2024-06-28 02:05:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:56,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974059370] [2024-06-28 02:05:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974059370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:59,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817628631] [2024-06-28 02:05:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:59,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:59,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:59,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:59,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 492 transitions, 9077 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:59,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:59,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:59,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:03,026 INFO L124 PetriNetUnfolderBase]: 7978/12256 cut-off events. [2024-06-28 02:06:03,027 INFO L125 PetriNetUnfolderBase]: For 481071/481073 co-relation queries the response was YES. [2024-06-28 02:06:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91396 conditions, 12256 events. 7978/12256 cut-off events. For 481071/481073 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 77852 event pairs, 1255 based on Foata normal form. 4/12259 useless extension candidates. Maximal degree in co-relation 91250. Up to 10465 conditions per place. [2024-06-28 02:06:03,200 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 439 selfloop transitions, 132 changer transitions 0/578 dead transitions. [2024-06-28 02:06:03,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 578 transitions, 10921 flow [2024-06-28 02:06:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:06:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:06:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-28 02:06:03,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164410058027079 [2024-06-28 02:06:03,202 INFO L175 Difference]: Start difference. First operand has 305 places, 492 transitions, 9077 flow. Second operand 11 states and 267 transitions. [2024-06-28 02:06:03,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 578 transitions, 10921 flow [2024-06-28 02:06:04,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 578 transitions, 10662 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:04,656 INFO L231 Difference]: Finished difference. Result has 311 places, 502 transitions, 9393 flow [2024-06-28 02:06:04,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8822, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9393, PETRI_PLACES=311, PETRI_TRANSITIONS=502} [2024-06-28 02:06:04,657 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 260 predicate places. [2024-06-28 02:06:04,657 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 502 transitions, 9393 flow [2024-06-28 02:06:04,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:04,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:04,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:04,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:06:04,657 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:04,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 715349228, now seen corresponding path program 1 times [2024-06-28 02:06:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:04,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662858775] [2024-06-28 02:06:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:04,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662858775] [2024-06-28 02:06:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662858775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:08,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:08,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:06:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060207973] [2024-06-28 02:06:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:06:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:06:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:06:08,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:06:08,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 502 transitions, 9393 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:08,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:08,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:06:08,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:11,805 INFO L124 PetriNetUnfolderBase]: 7744/11980 cut-off events. [2024-06-28 02:06:11,805 INFO L125 PetriNetUnfolderBase]: For 510482/510566 co-relation queries the response was YES. [2024-06-28 02:06:11,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90224 conditions, 11980 events. 7744/11980 cut-off events. For 510482/510566 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 77450 event pairs, 1183 based on Foata normal form. 81/11993 useless extension candidates. Maximal degree in co-relation 90076. Up to 10101 conditions per place. [2024-06-28 02:06:11,982 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 425 selfloop transitions, 88 changer transitions 0/565 dead transitions. [2024-06-28 02:06:11,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 565 transitions, 10712 flow [2024-06-28 02:06:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:06:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:06:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-28 02:06:11,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-28 02:06:11,983 INFO L175 Difference]: Start difference. First operand has 311 places, 502 transitions, 9393 flow. Second operand 9 states and 223 transitions. [2024-06-28 02:06:11,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 565 transitions, 10712 flow [2024-06-28 02:06:13,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 565 transitions, 10380 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:13,782 INFO L231 Difference]: Finished difference. Result has 313 places, 504 transitions, 9294 flow [2024-06-28 02:06:13,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9294, PETRI_PLACES=313, PETRI_TRANSITIONS=504} [2024-06-28 02:06:13,783 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 262 predicate places. [2024-06-28 02:06:13,783 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 504 transitions, 9294 flow [2024-06-28 02:06:13,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:13,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:13,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:13,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:06:13,784 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:13,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash -795356788, now seen corresponding path program 4 times [2024-06-28 02:06:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396665266] [2024-06-28 02:06:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396665266] [2024-06-28 02:06:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396665266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:16,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:16,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196943211] [2024-06-28 02:06:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:16,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:16,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:16,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:16,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 504 transitions, 9294 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:16,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:16,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:16,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:19,966 INFO L124 PetriNetUnfolderBase]: 8213/12627 cut-off events. [2024-06-28 02:06:19,966 INFO L125 PetriNetUnfolderBase]: For 522272/522313 co-relation queries the response was YES. [2024-06-28 02:06:20,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94051 conditions, 12627 events. 8213/12627 cut-off events. For 522272/522313 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 81279 event pairs, 1388 based on Foata normal form. 40/12666 useless extension candidates. Maximal degree in co-relation 93902. Up to 11041 conditions per place. [2024-06-28 02:06:20,136 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 422 selfloop transitions, 129 changer transitions 0/558 dead transitions. [2024-06-28 02:06:20,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 558 transitions, 11020 flow [2024-06-28 02:06:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:06:20,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-28 02:06:20,138 INFO L175 Difference]: Start difference. First operand has 313 places, 504 transitions, 9294 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:06:20,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 558 transitions, 11020 flow [2024-06-28 02:06:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 558 transitions, 10791 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:21,684 INFO L231 Difference]: Finished difference. Result has 313 places, 507 transitions, 9397 flow [2024-06-28 02:06:21,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9397, PETRI_PLACES=313, PETRI_TRANSITIONS=507} [2024-06-28 02:06:21,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 262 predicate places. [2024-06-28 02:06:21,684 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 507 transitions, 9397 flow [2024-06-28 02:06:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:21,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:21,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:21,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:06:21,685 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:21,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1644696526, now seen corresponding path program 5 times [2024-06-28 02:06:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:21,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057478054] [2024-06-28 02:06:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057478054] [2024-06-28 02:06:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057478054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:24,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:24,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:24,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375414560] [2024-06-28 02:06:24,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:24,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:24,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:24,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 507 transitions, 9397 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:24,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:24,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:24,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:27,641 INFO L124 PetriNetUnfolderBase]: 8241/12685 cut-off events. [2024-06-28 02:06:27,641 INFO L125 PetriNetUnfolderBase]: For 528072/528113 co-relation queries the response was YES. [2024-06-28 02:06:27,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94269 conditions, 12685 events. 8241/12685 cut-off events. For 528072/528113 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 81833 event pairs, 1396 based on Foata normal form. 40/12724 useless extension candidates. Maximal degree in co-relation 94119. Up to 11069 conditions per place. [2024-06-28 02:06:27,840 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 419 selfloop transitions, 133 changer transitions 0/559 dead transitions. [2024-06-28 02:06:27,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 559 transitions, 11049 flow [2024-06-28 02:06:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:06:27,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-28 02:06:27,841 INFO L175 Difference]: Start difference. First operand has 313 places, 507 transitions, 9397 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:06:27,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 559 transitions, 11049 flow [2024-06-28 02:06:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 559 transitions, 10691 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:29,801 INFO L231 Difference]: Finished difference. Result has 316 places, 513 transitions, 9474 flow [2024-06-28 02:06:29,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9066, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9474, PETRI_PLACES=316, PETRI_TRANSITIONS=513} [2024-06-28 02:06:29,802 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-06-28 02:06:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 513 transitions, 9474 flow [2024-06-28 02:06:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:29,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:29,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:29,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:06:29,802 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:29,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 652621396, now seen corresponding path program 5 times [2024-06-28 02:06:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:29,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076441184] [2024-06-28 02:06:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:32,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:32,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076441184] [2024-06-28 02:06:32,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076441184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:32,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:32,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:32,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618411826] [2024-06-28 02:06:32,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:32,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:32,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:32,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 513 transitions, 9474 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:32,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:32,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:32,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:36,754 INFO L124 PetriNetUnfolderBase]: 8264/12566 cut-off events. [2024-06-28 02:06:36,754 INFO L125 PetriNetUnfolderBase]: For 534158/534170 co-relation queries the response was YES. [2024-06-28 02:06:36,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94419 conditions, 12566 events. 8264/12566 cut-off events. For 534158/534170 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 79255 event pairs, 1582 based on Foata normal form. 3/12560 useless extension candidates. Maximal degree in co-relation 94268. Up to 9890 conditions per place. [2024-06-28 02:06:36,967 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 317 selfloop transitions, 252 changer transitions 0/576 dead transitions. [2024-06-28 02:06:36,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 576 transitions, 11516 flow [2024-06-28 02:06:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:06:36,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-28 02:06:36,968 INFO L175 Difference]: Start difference. First operand has 316 places, 513 transitions, 9474 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:06:36,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 576 transitions, 11516 flow [2024-06-28 02:06:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 576 transitions, 11315 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:38,683 INFO L231 Difference]: Finished difference. Result has 321 places, 519 transitions, 9957 flow [2024-06-28 02:06:38,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9957, PETRI_PLACES=321, PETRI_TRANSITIONS=519} [2024-06-28 02:06:38,683 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 270 predicate places. [2024-06-28 02:06:38,684 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 519 transitions, 9957 flow [2024-06-28 02:06:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:38,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:38,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:38,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:06:38,684 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:38,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1023138154, now seen corresponding path program 6 times [2024-06-28 02:06:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416358615] [2024-06-28 02:06:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416358615] [2024-06-28 02:06:41,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416358615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:41,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:41,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:41,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119393212] [2024-06-28 02:06:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:41,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:41,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 519 transitions, 9957 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:41,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:41,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:41,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:45,429 INFO L124 PetriNetUnfolderBase]: 8287/12619 cut-off events. [2024-06-28 02:06:45,429 INFO L125 PetriNetUnfolderBase]: For 558592/558604 co-relation queries the response was YES. [2024-06-28 02:06:45,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96240 conditions, 12619 events. 8287/12619 cut-off events. For 558592/558604 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 79772 event pairs, 1598 based on Foata normal form. 3/12613 useless extension candidates. Maximal degree in co-relation 96088. Up to 9906 conditions per place. [2024-06-28 02:06:45,648 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 315 selfloop transitions, 253 changer transitions 0/575 dead transitions. [2024-06-28 02:06:45,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 575 transitions, 11911 flow [2024-06-28 02:06:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:06:45,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:06:45,650 INFO L175 Difference]: Start difference. First operand has 321 places, 519 transitions, 9957 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:06:45,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 575 transitions, 11911 flow [2024-06-28 02:06:47,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 575 transitions, 11638 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-28 02:06:47,622 INFO L231 Difference]: Finished difference. Result has 325 places, 522 transitions, 10288 flow [2024-06-28 02:06:47,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9712, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10288, PETRI_PLACES=325, PETRI_TRANSITIONS=522} [2024-06-28 02:06:47,623 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 274 predicate places. [2024-06-28 02:06:47,623 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 522 transitions, 10288 flow [2024-06-28 02:06:47,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:47,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:47,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:06:47,623 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:47,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1204321646, now seen corresponding path program 6 times [2024-06-28 02:06:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105632874] [2024-06-28 02:06:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105632874] [2024-06-28 02:06:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105632874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907617619] [2024-06-28 02:06:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:50,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:50,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 522 transitions, 10288 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:50,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:50,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:50,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:54,747 INFO L124 PetriNetUnfolderBase]: 8310/12712 cut-off events. [2024-06-28 02:06:54,747 INFO L125 PetriNetUnfolderBase]: For 556203/556217 co-relation queries the response was YES. [2024-06-28 02:06:54,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97006 conditions, 12712 events. 8310/12712 cut-off events. For 556203/556217 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 81159 event pairs, 1416 based on Foata normal form. 15/12723 useless extension candidates. Maximal degree in co-relation 96852. Up to 11155 conditions per place. [2024-06-28 02:06:54,966 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 424 selfloop transitions, 151 changer transitions 0/582 dead transitions. [2024-06-28 02:06:54,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 582 transitions, 11986 flow [2024-06-28 02:06:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:06:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:06:54,967 INFO L175 Difference]: Start difference. First operand has 325 places, 522 transitions, 10288 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:06:54,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 582 transitions, 11986 flow [2024-06-28 02:06:57,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 582 transitions, 11662 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:06:57,245 INFO L231 Difference]: Finished difference. Result has 329 places, 525 transitions, 10344 flow [2024-06-28 02:06:57,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9966, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10344, PETRI_PLACES=329, PETRI_TRANSITIONS=525} [2024-06-28 02:06:57,246 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 278 predicate places. [2024-06-28 02:06:57,246 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 525 transitions, 10344 flow [2024-06-28 02:06:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:57,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:57,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:06:57,246 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:57,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1023137782, now seen corresponding path program 4 times [2024-06-28 02:06:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:57,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365444571] [2024-06-28 02:06:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:57,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:59,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:59,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365444571] [2024-06-28 02:06:59,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365444571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:59,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:59,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008206273] [2024-06-28 02:06:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:59,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:00,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:00,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 525 transitions, 10344 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:00,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:00,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:00,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:03,765 INFO L124 PetriNetUnfolderBase]: 8356/12765 cut-off events. [2024-06-28 02:07:03,766 INFO L125 PetriNetUnfolderBase]: For 576681/576695 co-relation queries the response was YES. [2024-06-28 02:07:03,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97128 conditions, 12765 events. 8356/12765 cut-off events. For 576681/576695 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 81317 event pairs, 1420 based on Foata normal form. 16/12777 useless extension candidates. Maximal degree in co-relation 96972. Up to 11150 conditions per place. [2024-06-28 02:07:03,960 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 432 selfloop transitions, 159 changer transitions 0/598 dead transitions. [2024-06-28 02:07:03,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 598 transitions, 12316 flow [2024-06-28 02:07:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:07:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:07:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-28 02:07:03,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2024-06-28 02:07:03,962 INFO L175 Difference]: Start difference. First operand has 329 places, 525 transitions, 10344 flow. Second operand 9 states and 218 transitions. [2024-06-28 02:07:03,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 598 transitions, 12316 flow [2024-06-28 02:07:05,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 598 transitions, 12110 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:05,951 INFO L231 Difference]: Finished difference. Result has 333 places, 533 transitions, 10649 flow [2024-06-28 02:07:05,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10138, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10649, PETRI_PLACES=333, PETRI_TRANSITIONS=533} [2024-06-28 02:07:05,952 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 282 predicate places. [2024-06-28 02:07:05,952 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 533 transitions, 10649 flow [2024-06-28 02:07:05,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:05,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:05,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:05,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:07:05,952 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:05,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1785696598, now seen corresponding path program 5 times [2024-06-28 02:07:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616989231] [2024-06-28 02:07:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616989231] [2024-06-28 02:07:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616989231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477607504] [2024-06-28 02:07:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:08,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:08,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 533 transitions, 10649 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:08,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:08,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:08,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:12,573 INFO L124 PetriNetUnfolderBase]: 8474/12956 cut-off events. [2024-06-28 02:07:12,573 INFO L125 PetriNetUnfolderBase]: For 611133/611147 co-relation queries the response was YES. [2024-06-28 02:07:12,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99495 conditions, 12956 events. 8474/12956 cut-off events. For 611133/611147 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 82656 event pairs, 1518 based on Foata normal form. 16/12968 useless extension candidates. Maximal degree in co-relation 99337. Up to 10176 conditions per place. [2024-06-28 02:07:12,757 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 429 selfloop transitions, 178 changer transitions 0/614 dead transitions. [2024-06-28 02:07:12,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 614 transitions, 13054 flow [2024-06-28 02:07:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:07:12,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:07:12,758 INFO L175 Difference]: Start difference. First operand has 333 places, 533 transitions, 10649 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:07:12,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 614 transitions, 13054 flow [2024-06-28 02:07:14,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 614 transitions, 12741 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:14,739 INFO L231 Difference]: Finished difference. Result has 338 places, 553 transitions, 11251 flow [2024-06-28 02:07:14,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10360, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11251, PETRI_PLACES=338, PETRI_TRANSITIONS=553} [2024-06-28 02:07:14,739 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 287 predicate places. [2024-06-28 02:07:14,740 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 553 transitions, 11251 flow [2024-06-28 02:07:14,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:14,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:14,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:14,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:07:14,740 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:14,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1477110174, now seen corresponding path program 7 times [2024-06-28 02:07:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107474699] [2024-06-28 02:07:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107474699] [2024-06-28 02:07:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107474699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:17,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:17,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:17,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716986167] [2024-06-28 02:07:17,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:17,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 553 transitions, 11251 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:17,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:17,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:21,652 INFO L124 PetriNetUnfolderBase]: 8471/12978 cut-off events. [2024-06-28 02:07:21,653 INFO L125 PetriNetUnfolderBase]: For 618483/618497 co-relation queries the response was YES. [2024-06-28 02:07:21,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102450 conditions, 12978 events. 8471/12978 cut-off events. For 618483/618497 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 83236 event pairs, 1408 based on Foata normal form. 15/12989 useless extension candidates. Maximal degree in co-relation 102288. Up to 11374 conditions per place. [2024-06-28 02:07:22,136 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 449 selfloop transitions, 151 changer transitions 0/607 dead transitions. [2024-06-28 02:07:22,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 607 transitions, 13073 flow [2024-06-28 02:07:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:07:22,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-28 02:07:22,160 INFO L175 Difference]: Start difference. First operand has 338 places, 553 transitions, 11251 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:07:22,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 607 transitions, 13073 flow [2024-06-28 02:07:24,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 607 transitions, 12962 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-28 02:07:24,147 INFO L231 Difference]: Finished difference. Result has 344 places, 553 transitions, 11449 flow [2024-06-28 02:07:24,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11140, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11449, PETRI_PLACES=344, PETRI_TRANSITIONS=553} [2024-06-28 02:07:24,148 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 293 predicate places. [2024-06-28 02:07:24,148 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 553 transitions, 11449 flow [2024-06-28 02:07:24,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:24,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:24,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:07:24,148 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:24,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash -683066636, now seen corresponding path program 8 times [2024-06-28 02:07:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:24,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858431512] [2024-06-28 02:07:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858431512] [2024-06-28 02:07:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858431512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:26,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553298279] [2024-06-28 02:07:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:26,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:26,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 553 transitions, 11449 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:26,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:31,685 INFO L124 PetriNetUnfolderBase]: 8468/12974 cut-off events. [2024-06-28 02:07:31,685 INFO L125 PetriNetUnfolderBase]: For 620489/620503 co-relation queries the response was YES. [2024-06-28 02:07:31,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102490 conditions, 12974 events. 8468/12974 cut-off events. For 620489/620503 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 83196 event pairs, 1414 based on Foata normal form. 15/12985 useless extension candidates. Maximal degree in co-relation 102325. Up to 11371 conditions per place. [2024-06-28 02:07:31,854 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 460 selfloop transitions, 153 changer transitions 0/620 dead transitions. [2024-06-28 02:07:31,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 620 transitions, 13247 flow [2024-06-28 02:07:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:07:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:07:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-28 02:07:31,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957446808510638 [2024-06-28 02:07:31,856 INFO L175 Difference]: Start difference. First operand has 344 places, 553 transitions, 11449 flow. Second operand 10 states and 233 transitions. [2024-06-28 02:07:31,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 620 transitions, 13247 flow [2024-06-28 02:07:34,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 620 transitions, 12933 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:34,040 INFO L231 Difference]: Finished difference. Result has 348 places, 553 transitions, 11447 flow [2024-06-28 02:07:34,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11135, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11447, PETRI_PLACES=348, PETRI_TRANSITIONS=553} [2024-06-28 02:07:34,041 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 297 predicate places. [2024-06-28 02:07:34,041 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 553 transitions, 11447 flow [2024-06-28 02:07:34,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:34,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:34,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:07:34,042 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -683066822, now seen corresponding path program 7 times [2024-06-28 02:07:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797052480] [2024-06-28 02:07:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797052480] [2024-06-28 02:07:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797052480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037151895] [2024-06-28 02:07:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:36,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:36,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 553 transitions, 11447 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:36,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:36,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:36,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:41,324 INFO L124 PetriNetUnfolderBase]: 8491/12870 cut-off events. [2024-06-28 02:07:41,325 INFO L125 PetriNetUnfolderBase]: For 650712/650724 co-relation queries the response was YES. [2024-06-28 02:07:41,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102244 conditions, 12870 events. 8491/12870 cut-off events. For 650712/650724 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 81004 event pairs, 1588 based on Foata normal form. 3/12864 useless extension candidates. Maximal degree in co-relation 102080. Up to 10156 conditions per place. [2024-06-28 02:07:41,527 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 333 selfloop transitions, 264 changer transitions 0/604 dead transitions. [2024-06-28 02:07:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 604 transitions, 13303 flow [2024-06-28 02:07:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:07:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:07:41,529 INFO L175 Difference]: Start difference. First operand has 348 places, 553 transitions, 11447 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:07:41,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 604 transitions, 13303 flow [2024-06-28 02:07:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 604 transitions, 12997 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:07:43,478 INFO L231 Difference]: Finished difference. Result has 348 places, 556 transitions, 11743 flow [2024-06-28 02:07:43,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11141, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11743, PETRI_PLACES=348, PETRI_TRANSITIONS=556} [2024-06-28 02:07:43,479 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 297 predicate places. [2024-06-28 02:07:43,479 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 556 transitions, 11743 flow [2024-06-28 02:07:43,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:43,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:43,479 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] [2024-06-28 02:07:43,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:07:43,479 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:43,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash -668874742, now seen corresponding path program 6 times [2024-06-28 02:07:43,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:43,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501051591] [2024-06-28 02:07:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:43,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501051591] [2024-06-28 02:07:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501051591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:46,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646788620] [2024-06-28 02:07:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:46,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:46,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 556 transitions, 11743 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:46,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:46,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:46,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:50,568 INFO L124 PetriNetUnfolderBase]: 8485/12992 cut-off events. [2024-06-28 02:07:50,568 INFO L125 PetriNetUnfolderBase]: For 655797/655811 co-relation queries the response was YES. [2024-06-28 02:07:50,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103192 conditions, 12992 events. 8485/12992 cut-off events. For 655797/655811 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 83234 event pairs, 1448 based on Foata normal form. 16/13004 useless extension candidates. Maximal degree in co-relation 103027. Up to 11366 conditions per place. [2024-06-28 02:07:50,904 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 448 selfloop transitions, 155 changer transitions 0/610 dead transitions. [2024-06-28 02:07:50,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 610 transitions, 13410 flow [2024-06-28 02:07:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:07:50,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-28 02:07:50,906 INFO L175 Difference]: Start difference. First operand has 348 places, 556 transitions, 11743 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:07:50,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 610 transitions, 13410 flow [2024-06-28 02:07:53,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 610 transitions, 12889 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:53,029 INFO L231 Difference]: Finished difference. Result has 351 places, 557 transitions, 11558 flow [2024-06-28 02:07:53,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11222, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11558, PETRI_PLACES=351, PETRI_TRANSITIONS=557} [2024-06-28 02:07:53,029 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 300 predicate places. [2024-06-28 02:07:53,030 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 557 transitions, 11558 flow [2024-06-28 02:07:53,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:53,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:53,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:07:53,030 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:53,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -924787512, now seen corresponding path program 8 times [2024-06-28 02:07:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:53,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736146530] [2024-06-28 02:07:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:56,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:56,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736146530] [2024-06-28 02:07:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736146530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:56,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:56,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944321804] [2024-06-28 02:07:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:56,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:56,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 557 transitions, 11558 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:56,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:56,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:56,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:00,785 INFO L124 PetriNetUnfolderBase]: 8508/13124 cut-off events. [2024-06-28 02:08:00,786 INFO L125 PetriNetUnfolderBase]: For 633414/633416 co-relation queries the response was YES. [2024-06-28 02:08:00,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102605 conditions, 13124 events. 8508/13124 cut-off events. For 633414/633416 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 85027 event pairs, 1345 based on Foata normal form. 1/13124 useless extension candidates. Maximal degree in co-relation 102439. Up to 10759 conditions per place. [2024-06-28 02:08:00,970 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 395 selfloop transitions, 229 changer transitions 0/631 dead transitions. [2024-06-28 02:08:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 631 transitions, 13352 flow [2024-06-28 02:08:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:08:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:08:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:08:00,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-28 02:08:00,971 INFO L175 Difference]: Start difference. First operand has 351 places, 557 transitions, 11558 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:08:00,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 631 transitions, 13352 flow [2024-06-28 02:08:03,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 631 transitions, 12959 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 02:08:03,542 INFO L231 Difference]: Finished difference. Result has 354 places, 560 transitions, 11823 flow [2024-06-28 02:08:03,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11165, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11823, PETRI_PLACES=354, PETRI_TRANSITIONS=560} [2024-06-28 02:08:03,543 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 303 predicate places. [2024-06-28 02:08:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 560 transitions, 11823 flow [2024-06-28 02:08:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:03,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 02:08:03,543 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -624901074, now seen corresponding path program 9 times [2024-06-28 02:08:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227720933] [2024-06-28 02:08:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227720933] [2024-06-28 02:08:06,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227720933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:06,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:06,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:08:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643042925] [2024-06-28 02:08:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:08:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:08:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:08:06,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:08:06,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 560 transitions, 11823 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:06,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:06,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:08:06,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:10,120 INFO L124 PetriNetUnfolderBase]: 8505/13036 cut-off events. [2024-06-28 02:08:10,120 INFO L125 PetriNetUnfolderBase]: For 645809/645821 co-relation queries the response was YES. [2024-06-28 02:08:10,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103683 conditions, 13036 events. 8505/13036 cut-off events. For 645809/645821 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 83480 event pairs, 1338 based on Foata normal form. 3/13038 useless extension candidates. Maximal degree in co-relation 103515. Up to 11100 conditions per place. [2024-06-28 02:08:10,322 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 404 selfloop transitions, 197 changer transitions 0/608 dead transitions. [2024-06-28 02:08:10,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 608 transitions, 13443 flow [2024-06-28 02:08:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:08:10,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501519756838906 [2024-06-28 02:08:10,324 INFO L175 Difference]: Start difference. First operand has 354 places, 560 transitions, 11823 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:08:10,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 608 transitions, 13443 flow