./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:36:41,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:36:41,506 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:36:41,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:36:41,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:36:41,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:36:41,535 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:36:41,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:36:41,536 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:36:41,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:36:41,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:36:41,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:36:41,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:36:41,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:36:41,539 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:36:41,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:36:41,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:36:41,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:36:41,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:36:41,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:36:41,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:36:41,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:36:41,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:36:41,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:36:41,543 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:36:41,543 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:36:41,543 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:36:41,544 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:36:41,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:36:41,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:36:41,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:36:41,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:36:41,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:36:41,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:36:41,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:36:41,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:36:41,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:36:41,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:36:41,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:36:41,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:36:41,547 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:36:41,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:36:41,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:36:41,548 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:36:41,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:36:41,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:36:41,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:36:41,753 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:36:41,753 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:36:41,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_power.opt.yml/witness.yml [2024-06-21 21:36:41,963 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:36:41,964 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:36:41,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-21 21:36:42,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:36:43,069 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:36:43,070 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-21 21:36:43,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723773167/9c5b51cde23345baa48eec9b5e5f6a3d/FLAG732fb1e48 [2024-06-21 21:36:43,091 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723773167/9c5b51cde23345baa48eec9b5e5f6a3d [2024-06-21 21:36:43,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:36:43,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:36:43,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:36:43,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:36:43,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:36:43,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:36:41" (1/2) ... [2024-06-21 21:36:43,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2708b511 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:36:43, skipping insertion in model container [2024-06-21 21:36:43,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:36:41" (1/2) ... [2024-06-21 21:36:43,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bb29723 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:36:43, skipping insertion in model container [2024-06-21 21:36:43,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:36:43" (2/2) ... [2024-06-21 21:36:43,104 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2708b511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43, skipping insertion in model container [2024-06-21 21:36:43,104 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:36:43" (2/2) ... [2024-06-21 21:36:43,104 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:36:43,262 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:36:43,263 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:36:43,263 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:36:43,264 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:36:43,264 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:36:43,264 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 21:36:43,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:36:43,660 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:36:43,672 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:36:43,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:36:43,815 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:36:43,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43 WrapperNode [2024-06-21 21:36:43,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:36:43,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:36:43,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:36:43,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:36:43,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,893 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-21 21:36:43,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:36:43,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:36:43,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:36:43,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:36:43,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,943 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-21 21:36:43,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,965 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:36:43,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:36:43,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:36:43,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:36:43,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (1/1) ... [2024-06-21 21:36:43,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:36:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:36:44,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:36:44,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:36:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:36:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:36:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:36:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:36:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:36:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:36:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:36:44,070 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:36:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:36:44,070 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:36:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:36:44,071 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:36:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:36:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:36:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:36:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:36:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:36:44,074 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:36:44,194 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:36:44,196 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:36:44,672 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:36:44,673 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:36:45,030 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:36:45,031 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:36:45,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:36:45 BoogieIcfgContainer [2024-06-21 21:36:45,031 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:36:45,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:36:45,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:36:45,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:36:45,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:36:41" (1/4) ... [2024-06-21 21:36:45,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f9690d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:36:45, skipping insertion in model container [2024-06-21 21:36:45,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:36:43" (2/4) ... [2024-06-21 21:36:45,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f9690d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:36:45, skipping insertion in model container [2024-06-21 21:36:45,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:36:43" (3/4) ... [2024-06-21 21:36:45,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f9690d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:36:45, skipping insertion in model container [2024-06-21 21:36:45,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:36:45" (4/4) ... [2024-06-21 21:36:45,038 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.opt.i [2024-06-21 21:36:45,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:36:45,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:36:45,052 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:36:45,108 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:36:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:36:45,166 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:36:45,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:36:45,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:36:45,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:36:45,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:36:45,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:36:45,189 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;@2677aebe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:36:45,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:36:45,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:36:45,193 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:36:45,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:36:45,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:45,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:36:45,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:45,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash 848284857, now seen corresponding path program 1 times [2024-06-21 21:36:45,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268832029] [2024-06-21 21:36:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268832029] [2024-06-21 21:36:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268832029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:36:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039152710] [2024-06-21 21:36:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:46,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:36:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:36:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:36:46,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:46,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:46,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:46,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:46,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:47,408 INFO L124 PetriNetUnfolderBase]: 1472/2225 cut-off events. [2024-06-21 21:36:47,408 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 21:36:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 2225 events. 1472/2225 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10135 event pairs, 1009 based on Foata normal form. 1/2182 useless extension candidates. Maximal degree in co-relation 4524. Up to 2210 conditions per place. [2024-06-21 21:36:47,423 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 21:36:47,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 185 flow [2024-06-21 21:36:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:36:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:36:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-21 21:36:47,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-21 21:36:47,434 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 67 transitions. [2024-06-21 21:36:47,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 185 flow [2024-06-21 21:36:47,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:47,439 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:36:47,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:36:47,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:36:47,443 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:36:47,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:47,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:47,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:47,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:36:47,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:47,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash -842003272, now seen corresponding path program 1 times [2024-06-21 21:36:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163113296] [2024-06-21 21:36:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163113296] [2024-06-21 21:36:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163113296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:48,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:48,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:36:48,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38913744] [2024-06-21 21:36:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:48,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:36:48,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:36:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:36:48,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:48,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:48,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:48,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:48,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:49,249 INFO L124 PetriNetUnfolderBase]: 1480/2236 cut-off events. [2024-06-21 21:36:49,249 INFO L125 PetriNetUnfolderBase]: For 404/412 co-relation queries the response was YES. [2024-06-21 21:36:49,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2236 events. 1480/2236 cut-off events. For 404/412 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10089 event pairs, 881 based on Foata normal form. 8/2241 useless extension candidates. Maximal degree in co-relation 5130. Up to 2173 conditions per place. [2024-06-21 21:36:49,258 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-21 21:36:49,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 298 flow [2024-06-21 21:36:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:36:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:36:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-21 21:36:49,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-21 21:36:49,260 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-21 21:36:49,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 298 flow [2024-06-21 21:36:49,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:36:49,262 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-21 21:36:49,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-21 21:36:49,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-21 21:36:49,263 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-21 21:36:49,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:49,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:49,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:49,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:36:49,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:49,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:49,264 INFO L85 PathProgramCache]: Analyzing trace with hash -332296489, now seen corresponding path program 1 times [2024-06-21 21:36:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:49,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990415432] [2024-06-21 21:36:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:49,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:50,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:50,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990415432] [2024-06-21 21:36:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990415432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:50,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:36:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413843515] [2024-06-21 21:36:50,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:50,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:36:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:36:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:36:50,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:50,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:50,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:50,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:50,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:51,100 INFO L124 PetriNetUnfolderBase]: 1488/2247 cut-off events. [2024-06-21 21:36:51,101 INFO L125 PetriNetUnfolderBase]: For 1371/1389 co-relation queries the response was YES. [2024-06-21 21:36:51,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6034 conditions, 2247 events. 1488/2247 cut-off events. For 1371/1389 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10170 event pairs, 749 based on Foata normal form. 11/2255 useless extension candidates. Maximal degree in co-relation 6019. Up to 2174 conditions per place. [2024-06-21 21:36:51,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-21 21:36:51,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 460 flow [2024-06-21 21:36:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:36:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:36:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-21 21:36:51,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-21 21:36:51,113 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 5 states and 113 transitions. [2024-06-21 21:36:51,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 460 flow [2024-06-21 21:36:51,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 84 transitions, 454 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 21:36:51,116 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 299 flow [2024-06-21 21:36:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-06-21 21:36:51,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 21:36:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 299 flow [2024-06-21 21:36:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:36:51,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1711255369, now seen corresponding path program 1 times [2024-06-21 21:36:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:51,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649224374] [2024-06-21 21:36:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:52,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649224374] [2024-06-21 21:36:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649224374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:52,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:36:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587545264] [2024-06-21 21:36:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:52,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:36:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:36:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:36:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:52,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:52,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:52,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:52,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:53,501 INFO L124 PetriNetUnfolderBase]: 1496/2258 cut-off events. [2024-06-21 21:36:53,502 INFO L125 PetriNetUnfolderBase]: For 2629/2646 co-relation queries the response was YES. [2024-06-21 21:36:53,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7085 conditions, 2258 events. 1496/2258 cut-off events. For 2629/2646 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10224 event pairs, 619 based on Foata normal form. 11/2266 useless extension candidates. Maximal degree in co-relation 7065. Up to 2155 conditions per place. [2024-06-21 21:36:53,515 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 74 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-21 21:36:53,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 617 flow [2024-06-21 21:36:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:36:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:36:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 21:36:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 21:36:53,519 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 299 flow. Second operand 6 states and 135 transitions. [2024-06-21 21:36:53,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 617 flow [2024-06-21 21:36:53,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 596 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 21:36:53,527 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 359 flow [2024-06-21 21:36:53,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-21 21:36:53,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 21:36:53,529 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 359 flow [2024-06-21 21:36:53,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:53,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:53,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:36:53,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:53,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1509307658, now seen corresponding path program 1 times [2024-06-21 21:36:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:53,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441215630] [2024-06-21 21:36:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441215630] [2024-06-21 21:36:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441215630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:55,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:36:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108396679] [2024-06-21 21:36:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:36:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:36:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:36:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:55,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:55,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:55,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:56,247 INFO L124 PetriNetUnfolderBase]: 1551/2343 cut-off events. [2024-06-21 21:36:56,247 INFO L125 PetriNetUnfolderBase]: For 4314/4331 co-relation queries the response was YES. [2024-06-21 21:36:56,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8076 conditions, 2343 events. 1551/2343 cut-off events. For 4314/4331 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10679 event pairs, 482 based on Foata normal form. 23/2363 useless extension candidates. Maximal degree in co-relation 8054. Up to 2112 conditions per place. [2024-06-21 21:36:56,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-21 21:36:56,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 116 transitions, 789 flow [2024-06-21 21:36:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 21:36:56,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-21 21:36:56,271 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 359 flow. Second operand 7 states and 158 transitions. [2024-06-21 21:36:56,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 116 transitions, 789 flow [2024-06-21 21:36:56,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 740 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:56,284 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 470 flow [2024-06-21 21:36:56,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=470, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-21 21:36:56,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 21:36:56,286 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 470 flow [2024-06-21 21:36:56,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:56,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:56,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:36:56,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:56,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2018931377, now seen corresponding path program 1 times [2024-06-21 21:36:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:56,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073723169] [2024-06-21 21:36:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073723169] [2024-06-21 21:36:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073723169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:36:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426962112] [2024-06-21 21:36:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:36:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:36:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:36:58,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:58,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 470 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:58,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:58,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:58,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:58,866 INFO L124 PetriNetUnfolderBase]: 1546/2336 cut-off events. [2024-06-21 21:36:58,867 INFO L125 PetriNetUnfolderBase]: For 7374/7391 co-relation queries the response was YES. [2024-06-21 21:36:58,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9202 conditions, 2336 events. 1546/2336 cut-off events. For 7374/7391 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10602 event pairs, 587 based on Foata normal form. 8/2341 useless extension candidates. Maximal degree in co-relation 9176. Up to 2310 conditions per place. [2024-06-21 21:36:58,880 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-21 21:36:58,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 682 flow [2024-06-21 21:36:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:36:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:36:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 21:36:58,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:36:58,881 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 470 flow. Second operand 5 states and 85 transitions. [2024-06-21 21:36:58,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 682 flow [2024-06-21 21:36:58,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 642 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 21:36:58,887 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 480 flow [2024-06-21 21:36:58,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-21 21:36:58,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:36:58,888 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 480 flow [2024-06-21 21:36:58,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:58,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:58,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:58,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:36:58,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:58,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1837638856, now seen corresponding path program 1 times [2024-06-21 21:36:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637674066] [2024-06-21 21:36:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:00,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637674066] [2024-06-21 21:37:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637674066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:00,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:37:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794190315] [2024-06-21 21:37:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:37:00,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:37:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:37:00,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:00,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:00,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:01,867 INFO L124 PetriNetUnfolderBase]: 1768/2654 cut-off events. [2024-06-21 21:37:01,867 INFO L125 PetriNetUnfolderBase]: For 9616/9616 co-relation queries the response was YES. [2024-06-21 21:37:01,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10690 conditions, 2654 events. 1768/2654 cut-off events. For 9616/9616 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12082 event pairs, 682 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 10661. Up to 2607 conditions per place. [2024-06-21 21:37:01,886 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-21 21:37:01,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 775 flow [2024-06-21 21:37:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:37:01,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:37:01,888 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 480 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:37:01,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 775 flow [2024-06-21 21:37:01,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 740 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:01,898 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 554 flow [2024-06-21 21:37:01,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=554, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-06-21 21:37:01,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 21:37:01,899 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 554 flow [2024-06-21 21:37:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:01,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:01,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:01,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:37:01,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:01,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1126509966, now seen corresponding path program 1 times [2024-06-21 21:37:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:01,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589165957] [2024-06-21 21:37:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589165957] [2024-06-21 21:37:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589165957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:03,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:37:03,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911920523] [2024-06-21 21:37:03,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:37:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:37:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:37:03,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:03,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:03,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:03,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:03,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:04,747 INFO L124 PetriNetUnfolderBase]: 1737/2616 cut-off events. [2024-06-21 21:37:04,747 INFO L125 PetriNetUnfolderBase]: For 12352/12418 co-relation queries the response was YES. [2024-06-21 21:37:04,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11433 conditions, 2616 events. 1737/2616 cut-off events. For 12352/12418 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12187 event pairs, 622 based on Foata normal form. 20/2619 useless extension candidates. Maximal degree in co-relation 11401. Up to 2443 conditions per place. [2024-06-21 21:37:04,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 31 changer transitions 0/119 dead transitions. [2024-06-21 21:37:04,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1002 flow [2024-06-21 21:37:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 21:37:04,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 21:37:04,765 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 554 flow. Second operand 6 states and 116 transitions. [2024-06-21 21:37:04,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1002 flow [2024-06-21 21:37:04,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 994 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:04,776 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 745 flow [2024-06-21 21:37:04,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=745, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2024-06-21 21:37:04,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 21:37:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 745 flow [2024-06-21 21:37:04,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:04,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:04,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:04,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:37:04,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:04,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -739689374, now seen corresponding path program 2 times [2024-06-21 21:37:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:04,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575080531] [2024-06-21 21:37:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:06,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575080531] [2024-06-21 21:37:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575080531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:06,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:37:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703739030] [2024-06-21 21:37:06,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:06,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:37:06,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:37:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:37:06,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:06,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 745 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:06,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:06,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:06,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:07,596 INFO L124 PetriNetUnfolderBase]: 1757/2648 cut-off events. [2024-06-21 21:37:07,596 INFO L125 PetriNetUnfolderBase]: For 16189/16272 co-relation queries the response was YES. [2024-06-21 21:37:07,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2648 events. 1757/2648 cut-off events. For 16189/16272 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12347 event pairs, 612 based on Foata normal form. 24/2656 useless extension candidates. Maximal degree in co-relation 12585. Up to 2478 conditions per place. [2024-06-21 21:37:07,609 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-06-21 21:37:07,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 1055 flow [2024-06-21 21:37:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:37:07,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:37:07,611 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 745 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:37:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 1055 flow [2024-06-21 21:37:07,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 113 transitions, 1005 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:07,622 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 764 flow [2024-06-21 21:37:07,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=764, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 21:37:07,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 21:37:07,623 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 764 flow [2024-06-21 21:37:07,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:07,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:07,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:37:07,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:07,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash 90960683, now seen corresponding path program 1 times [2024-06-21 21:37:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:07,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859584432] [2024-06-21 21:37:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:09,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:09,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859584432] [2024-06-21 21:37:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859584432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:09,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192520460] [2024-06-21 21:37:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:09,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:09,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:09,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:09,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:09,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:10,817 INFO L124 PetriNetUnfolderBase]: 1771/2672 cut-off events. [2024-06-21 21:37:10,818 INFO L125 PetriNetUnfolderBase]: For 17706/17784 co-relation queries the response was YES. [2024-06-21 21:37:10,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13017 conditions, 2672 events. 1771/2672 cut-off events. For 17706/17784 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12340 event pairs, 616 based on Foata normal form. 24/2681 useless extension candidates. Maximal degree in co-relation 12978. Up to 2576 conditions per place. [2024-06-21 21:37:10,832 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 105 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-21 21:37:10,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 1231 flow [2024-06-21 21:37:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:37:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:37:10,834 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 764 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:37:10,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 1231 flow [2024-06-21 21:37:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 1178 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:10,847 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 895 flow [2024-06-21 21:37:10,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-21 21:37:10,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 21:37:10,848 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 895 flow [2024-06-21 21:37:10,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:10,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:10,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:10,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:37:10,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:10,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2118972807, now seen corresponding path program 2 times [2024-06-21 21:37:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97600419] [2024-06-21 21:37:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:10,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:12,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97600419] [2024-06-21 21:37:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97600419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:12,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:12,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907689058] [2024-06-21 21:37:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:12,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:13,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:13,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 895 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:13,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:13,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:13,869 INFO L124 PetriNetUnfolderBase]: 1798/2711 cut-off events. [2024-06-21 21:37:13,870 INFO L125 PetriNetUnfolderBase]: For 21254/21353 co-relation queries the response was YES. [2024-06-21 21:37:13,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13849 conditions, 2711 events. 1798/2711 cut-off events. For 21254/21353 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12553 event pairs, 598 based on Foata normal form. 40/2736 useless extension candidates. Maximal degree in co-relation 13806. Up to 2566 conditions per place. [2024-06-21 21:37:13,886 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 31 changer transitions 0/139 dead transitions. [2024-06-21 21:37:13,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1331 flow [2024-06-21 21:37:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:37:13,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 21:37:13,888 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 895 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:37:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1331 flow [2024-06-21 21:37:13,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 139 transitions, 1271 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:13,902 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 966 flow [2024-06-21 21:37:13,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2024-06-21 21:37:13,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 21:37:13,903 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 966 flow [2024-06-21 21:37:13,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:13,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:13,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:13,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:37:13,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:13,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -987947179, now seen corresponding path program 1 times [2024-06-21 21:37:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:13,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877356954] [2024-06-21 21:37:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:13,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:15,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877356954] [2024-06-21 21:37:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877356954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:15,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:15,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709455260] [2024-06-21 21:37:15,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:15,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:15,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:15,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:15,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 966 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:15,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:15,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:15,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:17,255 INFO L124 PetriNetUnfolderBase]: 1922/2883 cut-off events. [2024-06-21 21:37:17,255 INFO L125 PetriNetUnfolderBase]: For 24778/24786 co-relation queries the response was YES. [2024-06-21 21:37:17,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 2883 events. 1922/2883 cut-off events. For 24778/24786 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13252 event pairs, 632 based on Foata normal form. 12/2892 useless extension candidates. Maximal degree in co-relation 14851. Up to 2716 conditions per place. [2024-06-21 21:37:17,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 126 selfloop transitions, 23 changer transitions 0/152 dead transitions. [2024-06-21 21:37:17,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 152 transitions, 1512 flow [2024-06-21 21:37:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:37:17,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:37:17,274 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 966 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:37:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 152 transitions, 1512 flow [2024-06-21 21:37:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 152 transitions, 1403 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:17,293 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 1062 flow [2024-06-21 21:37:17,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1062, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-06-21 21:37:17,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 21:37:17,294 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 1062 flow [2024-06-21 21:37:17,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:17,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:17,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:17,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:37:17,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:17,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash 562072495, now seen corresponding path program 3 times [2024-06-21 21:37:17,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646375741] [2024-06-21 21:37:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:18,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:18,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646375741] [2024-06-21 21:37:18,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646375741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:18,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:18,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:18,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118729684] [2024-06-21 21:37:18,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:18,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:18,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:18,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:18,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:18,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 1062 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:18,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:18,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:18,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:19,902 INFO L124 PetriNetUnfolderBase]: 1864/2810 cut-off events. [2024-06-21 21:37:19,903 INFO L125 PetriNetUnfolderBase]: For 25934/26215 co-relation queries the response was YES. [2024-06-21 21:37:19,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14863 conditions, 2810 events. 1864/2810 cut-off events. For 25934/26215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13163 event pairs, 566 based on Foata normal form. 32/2780 useless extension candidates. Maximal degree in co-relation 14816. Up to 2624 conditions per place. [2024-06-21 21:37:19,919 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 41 changer transitions 0/162 dead transitions. [2024-06-21 21:37:19,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 162 transitions, 1597 flow [2024-06-21 21:37:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:37:19,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 21:37:19,922 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 1062 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:37:19,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 162 transitions, 1597 flow [2024-06-21 21:37:19,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 162 transitions, 1565 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:19,940 INFO L231 Difference]: Finished difference. Result has 103 places, 134 transitions, 1327 flow [2024-06-21 21:37:19,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1327, PETRI_PLACES=103, PETRI_TRANSITIONS=134} [2024-06-21 21:37:19,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 21:37:19,941 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 134 transitions, 1327 flow [2024-06-21 21:37:19,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:19,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:19,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:19,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:37:19,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:19,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -316583155, now seen corresponding path program 4 times [2024-06-21 21:37:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:19,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146697635] [2024-06-21 21:37:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:21,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:21,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146697635] [2024-06-21 21:37:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146697635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:21,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:21,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798913674] [2024-06-21 21:37:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:21,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:21,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:21,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:21,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:22,715 INFO L124 PetriNetUnfolderBase]: 1860/2811 cut-off events. [2024-06-21 21:37:22,716 INFO L125 PetriNetUnfolderBase]: For 30839/31098 co-relation queries the response was YES. [2024-06-21 21:37:22,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15929 conditions, 2811 events. 1860/2811 cut-off events. For 30839/31098 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13194 event pairs, 577 based on Foata normal form. 30/2784 useless extension candidates. Maximal degree in co-relation 15878. Up to 2622 conditions per place. [2024-06-21 21:37:22,732 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2024-06-21 21:37:22,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1827 flow [2024-06-21 21:37:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:37:22,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:37:22,735 INFO L175 Difference]: Start difference. First operand has 103 places, 134 transitions, 1327 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:37:22,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1827 flow [2024-06-21 21:37:22,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1767 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:22,756 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1419 flow [2024-06-21 21:37:22,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-21 21:37:22,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 21:37:22,757 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1419 flow [2024-06-21 21:37:22,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:22,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:22,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:37:22,757 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:22,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 739441351, now seen corresponding path program 2 times [2024-06-21 21:37:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089944431] [2024-06-21 21:37:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089944431] [2024-06-21 21:37:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089944431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642724879] [2024-06-21 21:37:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:24,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:24,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1419 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:24,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:24,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:24,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:25,708 INFO L124 PetriNetUnfolderBase]: 1986/2976 cut-off events. [2024-06-21 21:37:25,708 INFO L125 PetriNetUnfolderBase]: For 33608/33639 co-relation queries the response was YES. [2024-06-21 21:37:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17010 conditions, 2976 events. 1986/2976 cut-off events. For 33608/33639 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13643 event pairs, 620 based on Foata normal form. 26/2998 useless extension candidates. Maximal degree in co-relation 16956. Up to 2793 conditions per place. [2024-06-21 21:37:25,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 29 changer transitions 0/172 dead transitions. [2024-06-21 21:37:25,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 172 transitions, 1928 flow [2024-06-21 21:37:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:37:25,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:37:25,726 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1419 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:37:25,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 172 transitions, 1928 flow [2024-06-21 21:37:25,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 172 transitions, 1809 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:25,749 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1420 flow [2024-06-21 21:37:25,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1420, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2024-06-21 21:37:25,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 21:37:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1420 flow [2024-06-21 21:37:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:25,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:37:25,751 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 739204201, now seen corresponding path program 3 times [2024-06-21 21:37:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958815] [2024-06-21 21:37:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:27,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958815] [2024-06-21 21:37:27,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:27,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:27,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251542786] [2024-06-21 21:37:27,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:27,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:27,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1420 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:27,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:27,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:27,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:28,793 INFO L124 PetriNetUnfolderBase]: 1976/2962 cut-off events. [2024-06-21 21:37:28,793 INFO L125 PetriNetUnfolderBase]: For 35414/35445 co-relation queries the response was YES. [2024-06-21 21:37:28,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 2962 events. 1976/2962 cut-off events. For 35414/35445 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13577 event pairs, 618 based on Foata normal form. 26/2984 useless extension candidates. Maximal degree in co-relation 16974. Up to 2785 conditions per place. [2024-06-21 21:37:28,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 28 changer transitions 0/171 dead transitions. [2024-06-21 21:37:28,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 171 transitions, 1830 flow [2024-06-21 21:37:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:37:28,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:37:28,812 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1420 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:37:28,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 171 transitions, 1830 flow [2024-06-21 21:37:28,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 1795 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 21:37:28,839 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1449 flow [2024-06-21 21:37:28,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1449, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-21 21:37:28,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:37:28,840 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1449 flow [2024-06-21 21:37:28,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:28,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:28,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:28,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:37:28,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:28,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 739450279, now seen corresponding path program 1 times [2024-06-21 21:37:28,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:28,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340337230] [2024-06-21 21:37:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:28,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:31,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:31,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340337230] [2024-06-21 21:37:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340337230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:31,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110739154] [2024-06-21 21:37:31,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:31,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:31,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:31,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1449 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:31,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:31,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:31,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:32,673 INFO L124 PetriNetUnfolderBase]: 1968/2951 cut-off events. [2024-06-21 21:37:32,673 INFO L125 PetriNetUnfolderBase]: For 38249/38249 co-relation queries the response was YES. [2024-06-21 21:37:32,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17147 conditions, 2951 events. 1968/2951 cut-off events. For 38249/38249 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13527 event pairs, 620 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 17089. Up to 2877 conditions per place. [2024-06-21 21:37:32,694 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 156 selfloop transitions, 13 changer transitions 0/172 dead transitions. [2024-06-21 21:37:32,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1875 flow [2024-06-21 21:37:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:37:32,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 21:37:32,696 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1449 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:37:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1875 flow [2024-06-21 21:37:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1819 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:32,730 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1446 flow [2024-06-21 21:37:32,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1446, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-06-21 21:37:32,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 21:37:32,731 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1446 flow [2024-06-21 21:37:32,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:32,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:32,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:32,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:37:32,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:32,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 240570829, now seen corresponding path program 1 times [2024-06-21 21:37:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:32,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071930349] [2024-06-21 21:37:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:35,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071930349] [2024-06-21 21:37:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071930349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:35,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:35,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:35,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619647070] [2024-06-21 21:37:35,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:35,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:35,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:35,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:35,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1446 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:35,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:35,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:35,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:36,880 INFO L124 PetriNetUnfolderBase]: 1925/2902 cut-off events. [2024-06-21 21:37:36,880 INFO L125 PetriNetUnfolderBase]: For 47792/47902 co-relation queries the response was YES. [2024-06-21 21:37:36,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 2902 events. 1925/2902 cut-off events. For 47792/47902 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13597 event pairs, 554 based on Foata normal form. 68/2908 useless extension candidates. Maximal degree in co-relation 17743. Up to 2474 conditions per place. [2024-06-21 21:37:36,900 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 68 changer transitions 0/200 dead transitions. [2024-06-21 21:37:36,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 200 transitions, 2182 flow [2024-06-21 21:37:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 21:37:36,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 21:37:36,902 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 1446 flow. Second operand 8 states and 159 transitions. [2024-06-21 21:37:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 200 transitions, 2182 flow [2024-06-21 21:37:36,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 2147 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:36,934 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1693 flow [2024-06-21 21:37:36,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-21 21:37:36,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 21:37:36,935 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1693 flow [2024-06-21 21:37:36,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:36,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:36,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:37:36,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:36,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash 240661194, now seen corresponding path program 1 times [2024-06-21 21:37:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421910109] [2024-06-21 21:37:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421910109] [2024-06-21 21:37:39,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421910109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:39,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:39,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:39,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435136923] [2024-06-21 21:37:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:39,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:39,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:39,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1693 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:39,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:39,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:39,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:40,666 INFO L124 PetriNetUnfolderBase]: 2042/3054 cut-off events. [2024-06-21 21:37:40,667 INFO L125 PetriNetUnfolderBase]: For 48207/48219 co-relation queries the response was YES. [2024-06-21 21:37:40,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19000 conditions, 3054 events. 2042/3054 cut-off events. For 48207/48219 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14016 event pairs, 615 based on Foata normal form. 16/3068 useless extension candidates. Maximal degree in co-relation 18940. Up to 2928 conditions per place. [2024-06-21 21:37:40,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2024-06-21 21:37:40,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 204 transitions, 2329 flow [2024-06-21 21:37:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:37:40,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:37:40,690 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1693 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:37:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 204 transitions, 2329 flow [2024-06-21 21:37:40,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 204 transitions, 2201 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:40,732 INFO L231 Difference]: Finished difference. Result has 129 places, 167 transitions, 1786 flow [2024-06-21 21:37:40,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1786, PETRI_PLACES=129, PETRI_TRANSITIONS=167} [2024-06-21 21:37:40,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 21:37:40,733 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 1786 flow [2024-06-21 21:37:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:40,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:40,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:37:40,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:40,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -561739445, now seen corresponding path program 2 times [2024-06-21 21:37:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:40,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472519736] [2024-06-21 21:37:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:43,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:43,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472519736] [2024-06-21 21:37:43,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472519736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:43,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:43,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:43,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901099420] [2024-06-21 21:37:43,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:43,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:43,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:43,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:43,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 1786 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:43,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:43,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:44,736 INFO L124 PetriNetUnfolderBase]: 1990/2998 cut-off events. [2024-06-21 21:37:44,737 INFO L125 PetriNetUnfolderBase]: For 58879/58963 co-relation queries the response was YES. [2024-06-21 21:37:44,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19805 conditions, 2998 events. 1990/2998 cut-off events. For 58879/58963 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14074 event pairs, 550 based on Foata normal form. 24/2961 useless extension candidates. Maximal degree in co-relation 19741. Up to 2752 conditions per place. [2024-06-21 21:37:44,760 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 47 changer transitions 0/211 dead transitions. [2024-06-21 21:37:44,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 211 transitions, 2398 flow [2024-06-21 21:37:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:37:44,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:37:44,762 INFO L175 Difference]: Start difference. First operand has 129 places, 167 transitions, 1786 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:37:44,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 211 transitions, 2398 flow [2024-06-21 21:37:44,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 211 transitions, 2346 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:44,813 INFO L231 Difference]: Finished difference. Result has 134 places, 171 transitions, 1906 flow [2024-06-21 21:37:44,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1906, PETRI_PLACES=134, PETRI_TRANSITIONS=171} [2024-06-21 21:37:44,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 21:37:44,814 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 171 transitions, 1906 flow [2024-06-21 21:37:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:44,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:44,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:37:44,815 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:44,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1259920824, now seen corresponding path program 2 times [2024-06-21 21:37:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:44,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434239934] [2024-06-21 21:37:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434239934] [2024-06-21 21:37:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434239934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:46,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569342754] [2024-06-21 21:37:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:46,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:46,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:46,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 171 transitions, 1906 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:46,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:46,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:48,070 INFO L124 PetriNetUnfolderBase]: 2100/3140 cut-off events. [2024-06-21 21:37:48,071 INFO L125 PetriNetUnfolderBase]: For 57027/57043 co-relation queries the response was YES. [2024-06-21 21:37:48,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20403 conditions, 3140 events. 2100/3140 cut-off events. For 57027/57043 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14420 event pairs, 585 based on Foata normal form. 20/3158 useless extension candidates. Maximal degree in co-relation 20337. Up to 2991 conditions per place. [2024-06-21 21:37:48,093 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-21 21:37:48,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 218 transitions, 2513 flow [2024-06-21 21:37:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:37:48,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:37:48,095 INFO L175 Difference]: Start difference. First operand has 134 places, 171 transitions, 1906 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:37:48,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 218 transitions, 2513 flow [2024-06-21 21:37:48,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 218 transitions, 2385 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:48,144 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1986 flow [2024-06-21 21:37:48,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-21 21:37:48,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 21:37:48,145 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1986 flow [2024-06-21 21:37:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:48,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:48,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:37:48,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:48,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash -561595140, now seen corresponding path program 3 times [2024-06-21 21:37:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:48,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390727560] [2024-06-21 21:37:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:48,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390727560] [2024-06-21 21:37:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390727560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:50,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:50,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:50,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242488396] [2024-06-21 21:37:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:50,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:50,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1986 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:50,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:50,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:51,141 INFO L124 PetriNetUnfolderBase]: 2126/3178 cut-off events. [2024-06-21 21:37:51,141 INFO L125 PetriNetUnfolderBase]: For 61737/61755 co-relation queries the response was YES. [2024-06-21 21:37:51,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21282 conditions, 3178 events. 2126/3178 cut-off events. For 61737/61755 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14641 event pairs, 583 based on Foata normal form. 22/3198 useless extension candidates. Maximal degree in co-relation 21212. Up to 2996 conditions per place. [2024-06-21 21:37:51,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 35 changer transitions 0/225 dead transitions. [2024-06-21 21:37:51,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2582 flow [2024-06-21 21:37:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:37:51,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:37:51,170 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1986 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:37:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2582 flow [2024-06-21 21:37:51,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 2551 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 21:37:51,238 INFO L231 Difference]: Finished difference. Result has 146 places, 192 transitions, 2109 flow [2024-06-21 21:37:51,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2109, PETRI_PLACES=146, PETRI_TRANSITIONS=192} [2024-06-21 21:37:51,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 21:37:51,239 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 192 transitions, 2109 flow [2024-06-21 21:37:51,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:51,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:51,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:37:51,240 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:51,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1259926559, now seen corresponding path program 3 times [2024-06-21 21:37:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:51,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210907233] [2024-06-21 21:37:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:51,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:53,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210907233] [2024-06-21 21:37:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210907233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:53,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:53,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562259825] [2024-06-21 21:37:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:53,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:53,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 192 transitions, 2109 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:53,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:53,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:53,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:54,751 INFO L124 PetriNetUnfolderBase]: 2085/3134 cut-off events. [2024-06-21 21:37:54,752 INFO L125 PetriNetUnfolderBase]: For 75820/75955 co-relation queries the response was YES. [2024-06-21 21:37:54,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22290 conditions, 3134 events. 2085/3134 cut-off events. For 75820/75955 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14787 event pairs, 519 based on Foata normal form. 24/3101 useless extension candidates. Maximal degree in co-relation 22216. Up to 2871 conditions per place. [2024-06-21 21:37:54,773 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 158 selfloop transitions, 48 changer transitions 0/230 dead transitions. [2024-06-21 21:37:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 230 transitions, 2731 flow [2024-06-21 21:37:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:37:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:37:54,775 INFO L175 Difference]: Start difference. First operand has 146 places, 192 transitions, 2109 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:37:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 230 transitions, 2731 flow [2024-06-21 21:37:54,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 230 transitions, 2663 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:54,831 INFO L231 Difference]: Finished difference. Result has 150 places, 196 transitions, 2221 flow [2024-06-21 21:37:54,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2221, PETRI_PLACES=150, PETRI_TRANSITIONS=196} [2024-06-21 21:37:54,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:37:54,832 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 196 transitions, 2221 flow [2024-06-21 21:37:54,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:54,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:54,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:54,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:37:54,833 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:54,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1224141110, now seen corresponding path program 4 times [2024-06-21 21:37:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:54,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320442033] [2024-06-21 21:37:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:54,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320442033] [2024-06-21 21:37:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320442033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:56,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765988963] [2024-06-21 21:37:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:56,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 196 transitions, 2221 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:56,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:56,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:56,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:58,006 INFO L124 PetriNetUnfolderBase]: 2202/3288 cut-off events. [2024-06-21 21:37:58,006 INFO L125 PetriNetUnfolderBase]: For 74032/74072 co-relation queries the response was YES. [2024-06-21 21:37:58,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23068 conditions, 3288 events. 2202/3288 cut-off events. For 74032/74072 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15152 event pairs, 582 based on Foata normal form. 32/3316 useless extension candidates. Maximal degree in co-relation 22992. Up to 3094 conditions per place. [2024-06-21 21:37:58,030 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 200 selfloop transitions, 34 changer transitions 0/237 dead transitions. [2024-06-21 21:37:58,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 237 transitions, 2967 flow [2024-06-21 21:37:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:37:58,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:37:58,032 INFO L175 Difference]: Start difference. First operand has 150 places, 196 transitions, 2221 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:37:58,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 237 transitions, 2967 flow [2024-06-21 21:37:58,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 237 transitions, 2827 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:58,096 INFO L231 Difference]: Finished difference. Result has 153 places, 204 transitions, 2269 flow [2024-06-21 21:37:58,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2269, PETRI_PLACES=153, PETRI_TRANSITIONS=204} [2024-06-21 21:37:58,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 21:37:58,097 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 204 transitions, 2269 flow [2024-06-21 21:37:58,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:58,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:58,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:37:58,097 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1440495668, now seen corresponding path program 5 times [2024-06-21 21:37:58,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:58,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742247776] [2024-06-21 21:37:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742247776] [2024-06-21 21:37:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742247776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552287995] [2024-06-21 21:37:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:59,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:37:59,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 204 transitions, 2269 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:59,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:59,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:37:59,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:01,176 INFO L124 PetriNetUnfolderBase]: 2241/3345 cut-off events. [2024-06-21 21:38:01,176 INFO L125 PetriNetUnfolderBase]: For 81287/81327 co-relation queries the response was YES. [2024-06-21 21:38:01,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23913 conditions, 3345 events. 2241/3345 cut-off events. For 81287/81327 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15473 event pairs, 582 based on Foata normal form. 34/3375 useless extension candidates. Maximal degree in co-relation 23835. Up to 3135 conditions per place. [2024-06-21 21:38:01,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 42 changer transitions 0/241 dead transitions. [2024-06-21 21:38:01,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 241 transitions, 2938 flow [2024-06-21 21:38:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:38:01,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:38:01,203 INFO L175 Difference]: Start difference. First operand has 153 places, 204 transitions, 2269 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:38:01,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 241 transitions, 2938 flow [2024-06-21 21:38:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 241 transitions, 2856 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:01,290 INFO L231 Difference]: Finished difference. Result has 158 places, 210 transitions, 2395 flow [2024-06-21 21:38:01,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2395, PETRI_PLACES=158, PETRI_TRANSITIONS=210} [2024-06-21 21:38:01,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 21:38:01,291 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 210 transitions, 2395 flow [2024-06-21 21:38:01,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:01,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:01,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:38:01,292 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:01,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1440489933, now seen corresponding path program 4 times [2024-06-21 21:38:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:01,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861977883] [2024-06-21 21:38:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861977883] [2024-06-21 21:38:03,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861977883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:03,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:03,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570237754] [2024-06-21 21:38:03,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:03,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:03,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:03,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 210 transitions, 2395 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:03,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:03,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:03,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:04,771 INFO L124 PetriNetUnfolderBase]: 2169/3262 cut-off events. [2024-06-21 21:38:04,772 INFO L125 PetriNetUnfolderBase]: For 92542/92699 co-relation queries the response was YES. [2024-06-21 21:38:04,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24416 conditions, 3262 events. 2169/3262 cut-off events. For 92542/92699 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15523 event pairs, 526 based on Foata normal form. 36/3240 useless extension candidates. Maximal degree in co-relation 24336. Up to 2933 conditions per place. [2024-06-21 21:38:04,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 62 changer transitions 0/249 dead transitions. [2024-06-21 21:38:04,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 249 transitions, 3141 flow [2024-06-21 21:38:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:38:04,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:38:04,804 INFO L175 Difference]: Start difference. First operand has 158 places, 210 transitions, 2395 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:38:04,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 249 transitions, 3141 flow [2024-06-21 21:38:04,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 249 transitions, 2971 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:04,882 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2487 flow [2024-06-21 21:38:04,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2487, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-21 21:38:04,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 21:38:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2487 flow [2024-06-21 21:38:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:04,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:04,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:38:04,883 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1447847318, now seen corresponding path program 6 times [2024-06-21 21:38:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815642162] [2024-06-21 21:38:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:06,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:06,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815642162] [2024-06-21 21:38:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815642162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:06,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:06,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352586379] [2024-06-21 21:38:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:06,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:06,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2487 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:06,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:07,913 INFO L124 PetriNetUnfolderBase]: 2248/3357 cut-off events. [2024-06-21 21:38:07,914 INFO L125 PetriNetUnfolderBase]: For 96426/96466 co-relation queries the response was YES. [2024-06-21 21:38:07,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25100 conditions, 3357 events. 2248/3357 cut-off events. For 96426/96466 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15505 event pairs, 577 based on Foata normal form. 34/3387 useless extension candidates. Maximal degree in co-relation 25018. Up to 3147 conditions per place. [2024-06-21 21:38:07,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 43 changer transitions 0/251 dead transitions. [2024-06-21 21:38:07,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 251 transitions, 3143 flow [2024-06-21 21:38:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:38:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 21:38:07,946 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2487 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:38:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 251 transitions, 3143 flow [2024-06-21 21:38:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 251 transitions, 2960 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:08,054 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 2477 flow [2024-06-21 21:38:08,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-21 21:38:08,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 21:38:08,055 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 2477 flow [2024-06-21 21:38:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:08,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:08,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:38:08,056 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:08,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash -671208216, now seen corresponding path program 1 times [2024-06-21 21:38:08,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:08,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688186998] [2024-06-21 21:38:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688186998] [2024-06-21 21:38:10,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688186998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:10,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:10,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542578361] [2024-06-21 21:38:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:11,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:11,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 2477 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:11,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:11,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:11,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:12,475 INFO L124 PetriNetUnfolderBase]: 2408/3634 cut-off events. [2024-06-21 21:38:12,475 INFO L125 PetriNetUnfolderBase]: For 127437/127602 co-relation queries the response was YES. [2024-06-21 21:38:12,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28207 conditions, 3634 events. 2408/3634 cut-off events. For 127437/127602 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17713 event pairs, 376 based on Foata normal form. 42/3620 useless extension candidates. Maximal degree in co-relation 28123. Up to 2685 conditions per place. [2024-06-21 21:38:12,502 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 91 changer transitions 0/288 dead transitions. [2024-06-21 21:38:12,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 288 transitions, 3554 flow [2024-06-21 21:38:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:38:12,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 21:38:12,504 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 2477 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:38:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 288 transitions, 3554 flow [2024-06-21 21:38:12,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 288 transitions, 3422 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:12,587 INFO L231 Difference]: Finished difference. Result has 169 places, 227 transitions, 2695 flow [2024-06-21 21:38:12,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2695, PETRI_PLACES=169, PETRI_TRANSITIONS=227} [2024-06-21 21:38:12,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 21:38:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 227 transitions, 2695 flow [2024-06-21 21:38:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:12,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:12,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:12,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:38:12,593 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1132236914, now seen corresponding path program 2 times [2024-06-21 21:38:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:12,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788914722] [2024-06-21 21:38:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:12,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:15,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788914722] [2024-06-21 21:38:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788914722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:15,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:15,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386189290] [2024-06-21 21:38:15,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:15,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:15,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 227 transitions, 2695 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:15,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:15,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:15,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:17,000 INFO L124 PetriNetUnfolderBase]: 2488/3762 cut-off events. [2024-06-21 21:38:17,000 INFO L125 PetriNetUnfolderBase]: For 141724/141880 co-relation queries the response was YES. [2024-06-21 21:38:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30225 conditions, 3762 events. 2488/3762 cut-off events. For 141724/141880 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18544 event pairs, 538 based on Foata normal form. 56/3761 useless extension candidates. Maximal degree in co-relation 30139. Up to 3177 conditions per place. [2024-06-21 21:38:17,033 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 163 selfloop transitions, 91 changer transitions 0/284 dead transitions. [2024-06-21 21:38:17,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 284 transitions, 3535 flow [2024-06-21 21:38:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 21:38:17,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 21:38:17,034 INFO L175 Difference]: Start difference. First operand has 169 places, 227 transitions, 2695 flow. Second operand 9 states and 177 transitions. [2024-06-21 21:38:17,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 284 transitions, 3535 flow [2024-06-21 21:38:17,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 284 transitions, 3405 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:17,141 INFO L231 Difference]: Finished difference. Result has 173 places, 230 transitions, 2837 flow [2024-06-21 21:38:17,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2837, PETRI_PLACES=173, PETRI_TRANSITIONS=230} [2024-06-21 21:38:17,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 21:38:17,142 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 230 transitions, 2837 flow [2024-06-21 21:38:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:17,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:17,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:17,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:38:17,143 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:17,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1132236790, now seen corresponding path program 1 times [2024-06-21 21:38:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809246860] [2024-06-21 21:38:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809246860] [2024-06-21 21:38:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809246860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:19,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:19,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491624785] [2024-06-21 21:38:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:19,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:19,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 230 transitions, 2837 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:19,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:19,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:21,037 INFO L124 PetriNetUnfolderBase]: 2642/3967 cut-off events. [2024-06-21 21:38:21,037 INFO L125 PetriNetUnfolderBase]: For 139002/139020 co-relation queries the response was YES. [2024-06-21 21:38:21,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31800 conditions, 3967 events. 2642/3967 cut-off events. For 139002/139020 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19371 event pairs, 639 based on Foata normal form. 20/3985 useless extension candidates. Maximal degree in co-relation 31712. Up to 3393 conditions per place. [2024-06-21 21:38:21,070 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 79 changer transitions 0/300 dead transitions. [2024-06-21 21:38:21,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 300 transitions, 4073 flow [2024-06-21 21:38:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:21,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:38:21,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:38:21,071 INFO L175 Difference]: Start difference. First operand has 173 places, 230 transitions, 2837 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:38:21,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 300 transitions, 4073 flow [2024-06-21 21:38:21,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 300 transitions, 3864 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:21,205 INFO L231 Difference]: Finished difference. Result has 178 places, 246 transitions, 3127 flow [2024-06-21 21:38:21,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3127, PETRI_PLACES=178, PETRI_TRANSITIONS=246} [2024-06-21 21:38:21,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 21:38:21,205 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 246 transitions, 3127 flow [2024-06-21 21:38:21,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:21,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:21,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:38:21,206 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:21,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1129440404, now seen corresponding path program 3 times [2024-06-21 21:38:21,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:21,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310527076] [2024-06-21 21:38:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:24,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310527076] [2024-06-21 21:38:24,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310527076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:24,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:24,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:24,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017557241] [2024-06-21 21:38:24,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:24,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:24,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:24,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:24,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 246 transitions, 3127 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:24,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:24,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:24,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:25,811 INFO L124 PetriNetUnfolderBase]: 2634/3985 cut-off events. [2024-06-21 21:38:25,811 INFO L125 PetriNetUnfolderBase]: For 165450/165585 co-relation queries the response was YES. [2024-06-21 21:38:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33424 conditions, 3985 events. 2634/3985 cut-off events. For 165450/165585 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19950 event pairs, 562 based on Foata normal form. 41/3967 useless extension candidates. Maximal degree in co-relation 33332. Up to 3603 conditions per place. [2024-06-21 21:38:25,849 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 215 selfloop transitions, 50 changer transitions 0/299 dead transitions. [2024-06-21 21:38:25,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 299 transitions, 3978 flow [2024-06-21 21:38:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:38:25,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:38:25,850 INFO L175 Difference]: Start difference. First operand has 178 places, 246 transitions, 3127 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:38:25,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 299 transitions, 3978 flow [2024-06-21 21:38:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 299 transitions, 3864 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:25,991 INFO L231 Difference]: Finished difference. Result has 184 places, 249 transitions, 3198 flow [2024-06-21 21:38:25,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3198, PETRI_PLACES=184, PETRI_TRANSITIONS=249} [2024-06-21 21:38:25,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 21:38:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 249 transitions, 3198 flow [2024-06-21 21:38:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:38:25,992 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1129435630, now seen corresponding path program 2 times [2024-06-21 21:38:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204199193] [2024-06-21 21:38:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:28,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:28,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204199193] [2024-06-21 21:38:28,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204199193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:28,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:28,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358028488] [2024-06-21 21:38:28,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:28,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:28,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 249 transitions, 3198 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:28,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:28,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:28,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:30,289 INFO L124 PetriNetUnfolderBase]: 2745/4126 cut-off events. [2024-06-21 21:38:30,290 INFO L125 PetriNetUnfolderBase]: For 158543/158559 co-relation queries the response was YES. [2024-06-21 21:38:30,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34182 conditions, 4126 events. 2745/4126 cut-off events. For 158543/158559 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20318 event pairs, 624 based on Foata normal form. 20/4144 useless extension candidates. Maximal degree in co-relation 34088. Up to 3972 conditions per place. [2024-06-21 21:38:30,327 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 26 changer transitions 0/295 dead transitions. [2024-06-21 21:38:30,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 295 transitions, 3956 flow [2024-06-21 21:38:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:38:30,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:38:30,329 INFO L175 Difference]: Start difference. First operand has 184 places, 249 transitions, 3198 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:38:30,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 295 transitions, 3956 flow [2024-06-21 21:38:30,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 295 transitions, 3852 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:30,475 INFO L231 Difference]: Finished difference. Result has 186 places, 252 transitions, 3210 flow [2024-06-21 21:38:30,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=186, PETRI_TRANSITIONS=252} [2024-06-21 21:38:30,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 21:38:30,476 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 252 transitions, 3210 flow [2024-06-21 21:38:30,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:30,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:30,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:38:30,477 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:30,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -518306732, now seen corresponding path program 3 times [2024-06-21 21:38:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817729255] [2024-06-21 21:38:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817729255] [2024-06-21 21:38:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817729255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172248303] [2024-06-21 21:38:34,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:34,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:34,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:34,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 252 transitions, 3210 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:34,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:34,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:34,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:35,876 INFO L124 PetriNetUnfolderBase]: 2735/4112 cut-off events. [2024-06-21 21:38:35,876 INFO L125 PetriNetUnfolderBase]: For 164868/164884 co-relation queries the response was YES. [2024-06-21 21:38:35,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34392 conditions, 4112 events. 2735/4112 cut-off events. For 164868/164884 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20298 event pairs, 620 based on Foata normal form. 20/4130 useless extension candidates. Maximal degree in co-relation 34297. Up to 3919 conditions per place. [2024-06-21 21:38:35,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 30 changer transitions 0/302 dead transitions. [2024-06-21 21:38:35,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 302 transitions, 4029 flow [2024-06-21 21:38:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:38:35,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:38:35,922 INFO L175 Difference]: Start difference. First operand has 186 places, 252 transitions, 3210 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:38:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 302 transitions, 4029 flow [2024-06-21 21:38:36,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 302 transitions, 3937 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:36,101 INFO L231 Difference]: Finished difference. Result has 189 places, 258 transitions, 3298 flow [2024-06-21 21:38:36,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3298, PETRI_PLACES=189, PETRI_TRANSITIONS=258} [2024-06-21 21:38:36,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 21:38:36,102 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 258 transitions, 3298 flow [2024-06-21 21:38:36,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:36,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:36,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:36,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:38:36,102 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:36,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -403010912, now seen corresponding path program 4 times [2024-06-21 21:38:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296013487] [2024-06-21 21:38:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:38,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296013487] [2024-06-21 21:38:38,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296013487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:38,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:38,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:38,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380861568] [2024-06-21 21:38:38,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:38,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:38,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 258 transitions, 3298 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:38,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:38,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:38,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:40,142 INFO L124 PetriNetUnfolderBase]: 2995/4492 cut-off events. [2024-06-21 21:38:40,143 INFO L125 PetriNetUnfolderBase]: For 205856/205874 co-relation queries the response was YES. [2024-06-21 21:38:40,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39321 conditions, 4492 events. 2995/4492 cut-off events. For 205856/205874 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22499 event pairs, 612 based on Foata normal form. 20/4510 useless extension candidates. Maximal degree in co-relation 39224. Up to 3814 conditions per place. [2024-06-21 21:38:40,187 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 233 selfloop transitions, 105 changer transitions 0/341 dead transitions. [2024-06-21 21:38:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 341 transitions, 4796 flow [2024-06-21 21:38:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:38:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:38:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 21:38:40,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:38:40,189 INFO L175 Difference]: Start difference. First operand has 189 places, 258 transitions, 3298 flow. Second operand 10 states and 183 transitions. [2024-06-21 21:38:40,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 341 transitions, 4796 flow [2024-06-21 21:38:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 341 transitions, 4703 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:40,459 INFO L231 Difference]: Finished difference. Result has 195 places, 284 transitions, 3914 flow [2024-06-21 21:38:40,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3914, PETRI_PLACES=195, PETRI_TRANSITIONS=284} [2024-06-21 21:38:40,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 21:38:40,460 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 284 transitions, 3914 flow [2024-06-21 21:38:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:40,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:40,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:40,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:38:40,461 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:40,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1425728372, now seen corresponding path program 5 times [2024-06-21 21:38:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:40,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778403432] [2024-06-21 21:38:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:42,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:42,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778403432] [2024-06-21 21:38:42,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778403432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:42,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:42,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650557060] [2024-06-21 21:38:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:42,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:42,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 284 transitions, 3914 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:42,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:42,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:42,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:44,395 INFO L124 PetriNetUnfolderBase]: 3057/4582 cut-off events. [2024-06-21 21:38:44,395 INFO L125 PetriNetUnfolderBase]: For 221463/221485 co-relation queries the response was YES. [2024-06-21 21:38:44,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42170 conditions, 4582 events. 3057/4582 cut-off events. For 221463/221485 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22973 event pairs, 607 based on Foata normal form. 26/4606 useless extension candidates. Maximal degree in co-relation 42070. Up to 3868 conditions per place. [2024-06-21 21:38:44,448 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 240 selfloop transitions, 108 changer transitions 0/351 dead transitions. [2024-06-21 21:38:44,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 351 transitions, 5325 flow [2024-06-21 21:38:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:38:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:38:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:38:44,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 21:38:44,461 INFO L175 Difference]: Start difference. First operand has 195 places, 284 transitions, 3914 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:38:44,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 351 transitions, 5325 flow [2024-06-21 21:38:44,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 351 transitions, 5168 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:44,726 INFO L231 Difference]: Finished difference. Result has 200 places, 291 transitions, 4106 flow [2024-06-21 21:38:44,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3757, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4106, PETRI_PLACES=200, PETRI_TRANSITIONS=291} [2024-06-21 21:38:44,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 21:38:44,727 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 291 transitions, 4106 flow [2024-06-21 21:38:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:44,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:44,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:38:44,727 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:44,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -402837932, now seen corresponding path program 6 times [2024-06-21 21:38:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:44,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545586234] [2024-06-21 21:38:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545586234] [2024-06-21 21:38:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545586234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604201445] [2024-06-21 21:38:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:47,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:47,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 291 transitions, 4106 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:47,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:47,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:47,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:48,624 INFO L124 PetriNetUnfolderBase]: 3050/4573 cut-off events. [2024-06-21 21:38:48,624 INFO L125 PetriNetUnfolderBase]: For 228052/228074 co-relation queries the response was YES. [2024-06-21 21:38:48,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42780 conditions, 4573 events. 3050/4573 cut-off events. For 228052/228074 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22885 event pairs, 671 based on Foata normal form. 26/4597 useless extension candidates. Maximal degree in co-relation 42677. Up to 4364 conditions per place. [2024-06-21 21:38:48,674 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 39 changer transitions 0/337 dead transitions. [2024-06-21 21:38:48,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 337 transitions, 5060 flow [2024-06-21 21:38:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:38:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:38:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:38:48,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:38:48,676 INFO L175 Difference]: Start difference. First operand has 200 places, 291 transitions, 4106 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:38:48,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 337 transitions, 5060 flow [2024-06-21 21:38:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 337 transitions, 4919 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:48,937 INFO L231 Difference]: Finished difference. Result has 203 places, 292 transitions, 4072 flow [2024-06-21 21:38:48,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4072, PETRI_PLACES=203, PETRI_TRANSITIONS=292} [2024-06-21 21:38:48,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 21:38:48,937 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 292 transitions, 4072 flow [2024-06-21 21:38:48,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:48,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:48,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:48,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:38:48,938 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:48,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash -403015686, now seen corresponding path program 4 times [2024-06-21 21:38:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917107468] [2024-06-21 21:38:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:51,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:51,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917107468] [2024-06-21 21:38:51,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917107468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:51,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:51,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:51,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960524982] [2024-06-21 21:38:51,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:51,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:51,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:51,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:51,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 292 transitions, 4072 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:51,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:51,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:51,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:53,017 INFO L124 PetriNetUnfolderBase]: 3057/4613 cut-off events. [2024-06-21 21:38:53,017 INFO L125 PetriNetUnfolderBase]: For 257506/257614 co-relation queries the response was YES. [2024-06-21 21:38:53,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43685 conditions, 4613 events. 3057/4613 cut-off events. For 257506/257614 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23565 event pairs, 607 based on Foata normal form. 40/4595 useless extension candidates. Maximal degree in co-relation 43582. Up to 4191 conditions per place. [2024-06-21 21:38:53,063 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 241 selfloop transitions, 53 changer transitions 0/339 dead transitions. [2024-06-21 21:38:53,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 339 transitions, 4994 flow [2024-06-21 21:38:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:38:53,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:38:53,065 INFO L175 Difference]: Start difference. First operand has 203 places, 292 transitions, 4072 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:38:53,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 339 transitions, 4994 flow [2024-06-21 21:38:53,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 339 transitions, 4834 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:38:53,309 INFO L231 Difference]: Finished difference. Result has 203 places, 294 transitions, 4086 flow [2024-06-21 21:38:53,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4086, PETRI_PLACES=203, PETRI_TRANSITIONS=294} [2024-06-21 21:38:53,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 21:38:53,310 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 294 transitions, 4086 flow [2024-06-21 21:38:53,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:53,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:38:53,311 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:53,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash -402830988, now seen corresponding path program 1 times [2024-06-21 21:38:53,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:53,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424439903] [2024-06-21 21:38:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:56,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424439903] [2024-06-21 21:38:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424439903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:56,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:56,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354774870] [2024-06-21 21:38:56,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:56,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:56,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:56,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:38:56,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 294 transitions, 4086 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:56,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:56,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:38:56,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:57,971 INFO L124 PetriNetUnfolderBase]: 3158/4745 cut-off events. [2024-06-21 21:38:57,972 INFO L125 PetriNetUnfolderBase]: For 251228/251250 co-relation queries the response was YES. [2024-06-21 21:38:58,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44379 conditions, 4745 events. 3158/4745 cut-off events. For 251228/251250 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24028 event pairs, 689 based on Foata normal form. 24/4767 useless extension candidates. Maximal degree in co-relation 44275. Up to 4546 conditions per place. [2024-06-21 21:38:58,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 38 changer transitions 0/329 dead transitions. [2024-06-21 21:38:58,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 329 transitions, 4864 flow [2024-06-21 21:38:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:38:58,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:38:58,026 INFO L175 Difference]: Start difference. First operand has 203 places, 294 transitions, 4086 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:38:58,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 329 transitions, 4864 flow [2024-06-21 21:38:58,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 329 transitions, 4750 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:58,319 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 4093 flow [2024-06-21 21:38:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2024-06-21 21:38:58,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 21:38:58,319 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 4093 flow [2024-06-21 21:38:58,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:58,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:58,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:58,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:38:58,320 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:58,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1013964784, now seen corresponding path program 1 times [2024-06-21 21:38:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936480991] [2024-06-21 21:38:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:00,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936480991] [2024-06-21 21:39:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936480991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:00,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775167877] [2024-06-21 21:39:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:01,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:01,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 4093 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:01,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:02,941 INFO L124 PetriNetUnfolderBase]: 3202/4810 cut-off events. [2024-06-21 21:39:02,941 INFO L125 PetriNetUnfolderBase]: For 264476/264498 co-relation queries the response was YES. [2024-06-21 21:39:02,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45571 conditions, 4810 events. 3202/4810 cut-off events. For 264476/264498 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24386 event pairs, 688 based on Foata normal form. 22/4830 useless extension candidates. Maximal degree in co-relation 45466. Up to 4518 conditions per place. [2024-06-21 21:39:02,984 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 288 selfloop transitions, 54 changer transitions 0/345 dead transitions. [2024-06-21 21:39:02,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 345 transitions, 5253 flow [2024-06-21 21:39:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:39:02,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:39:02,986 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 4093 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:39:02,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 345 transitions, 5253 flow [2024-06-21 21:39:03,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 345 transitions, 5116 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:03,264 INFO L231 Difference]: Finished difference. Result has 208 places, 303 transitions, 4309 flow [2024-06-21 21:39:03,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4309, PETRI_PLACES=208, PETRI_TRANSITIONS=303} [2024-06-21 21:39:03,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 21:39:03,266 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 303 transitions, 4309 flow [2024-06-21 21:39:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:03,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:03,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:39:03,266 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:03,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash 934414276, now seen corresponding path program 2 times [2024-06-21 21:39:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:03,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578286341] [2024-06-21 21:39:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578286341] [2024-06-21 21:39:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578286341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:06,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:06,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573668844] [2024-06-21 21:39:06,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:06,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:06,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 303 transitions, 4309 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:06,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:06,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:06,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:07,861 INFO L124 PetriNetUnfolderBase]: 3222/4842 cut-off events. [2024-06-21 21:39:07,861 INFO L125 PetriNetUnfolderBase]: For 281430/281479 co-relation queries the response was YES. [2024-06-21 21:39:07,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46478 conditions, 4842 events. 3222/4842 cut-off events. For 281430/281479 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24616 event pairs, 696 based on Foata normal form. 38/4876 useless extension candidates. Maximal degree in co-relation 46371. Up to 4643 conditions per place. [2024-06-21 21:39:07,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 39 changer transitions 0/336 dead transitions. [2024-06-21 21:39:07,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 336 transitions, 5105 flow [2024-06-21 21:39:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:39:07,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:39:07,918 INFO L175 Difference]: Start difference. First operand has 208 places, 303 transitions, 4309 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:39:07,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 336 transitions, 5105 flow [2024-06-21 21:39:08,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 336 transitions, 4992 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:08,249 INFO L231 Difference]: Finished difference. Result has 209 places, 305 transitions, 4323 flow [2024-06-21 21:39:08,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4323, PETRI_PLACES=209, PETRI_TRANSITIONS=305} [2024-06-21 21:39:08,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 21:39:08,250 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 305 transitions, 4323 flow [2024-06-21 21:39:08,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:08,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:08,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:39:08,251 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:08,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1705521716, now seen corresponding path program 7 times [2024-06-21 21:39:08,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:08,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122720372] [2024-06-21 21:39:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122720372] [2024-06-21 21:39:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122720372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:10,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927336333] [2024-06-21 21:39:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:10,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 305 transitions, 4323 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:12,348 INFO L124 PetriNetUnfolderBase]: 3248/4880 cut-off events. [2024-06-21 21:39:12,349 INFO L125 PetriNetUnfolderBase]: For 291723/291772 co-relation queries the response was YES. [2024-06-21 21:39:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47049 conditions, 4880 events. 3248/4880 cut-off events. For 291723/291772 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24802 event pairs, 696 based on Foata normal form. 38/4914 useless extension candidates. Maximal degree in co-relation 46941. Up to 4576 conditions per place. [2024-06-21 21:39:12,403 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 62 changer transitions 0/345 dead transitions. [2024-06-21 21:39:12,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 345 transitions, 5176 flow [2024-06-21 21:39:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:39:12,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:39:12,422 INFO L175 Difference]: Start difference. First operand has 209 places, 305 transitions, 4323 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:39:12,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 345 transitions, 5176 flow [2024-06-21 21:39:12,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 345 transitions, 5071 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:12,779 INFO L231 Difference]: Finished difference. Result has 212 places, 308 transitions, 4412 flow [2024-06-21 21:39:12,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4412, PETRI_PLACES=212, PETRI_TRANSITIONS=308} [2024-06-21 21:39:12,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 21:39:12,780 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 308 transitions, 4412 flow [2024-06-21 21:39:12,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:12,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:12,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:39:12,781 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:12,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1705517066, now seen corresponding path program 8 times [2024-06-21 21:39:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:12,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133526800] [2024-06-21 21:39:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133526800] [2024-06-21 21:39:15,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133526800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:15,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:15,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695873139] [2024-06-21 21:39:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:15,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:15,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:15,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:15,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 308 transitions, 4412 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:15,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:15,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:15,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:17,069 INFO L124 PetriNetUnfolderBase]: 3292/4944 cut-off events. [2024-06-21 21:39:17,069 INFO L125 PetriNetUnfolderBase]: For 304975/305024 co-relation queries the response was YES. [2024-06-21 21:39:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48016 conditions, 4944 events. 3292/4944 cut-off events. For 304975/305024 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25170 event pairs, 688 based on Foata normal form. 38/4978 useless extension candidates. Maximal degree in co-relation 47907. Up to 4633 conditions per place. [2024-06-21 21:39:17,117 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 302 selfloop transitions, 55 changer transitions 0/360 dead transitions. [2024-06-21 21:39:17,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 360 transitions, 5558 flow [2024-06-21 21:39:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:39:17,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:39:17,120 INFO L175 Difference]: Start difference. First operand has 212 places, 308 transitions, 4412 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:39:17,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 360 transitions, 5558 flow [2024-06-21 21:39:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 360 transitions, 5399 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:17,441 INFO L231 Difference]: Finished difference. Result has 216 places, 315 transitions, 4524 flow [2024-06-21 21:39:17,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4524, PETRI_PLACES=216, PETRI_TRANSITIONS=315} [2024-06-21 21:39:17,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 21:39:17,442 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 315 transitions, 4524 flow [2024-06-21 21:39:17,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:17,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:17,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:39:17,443 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:17,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1705516942, now seen corresponding path program 5 times [2024-06-21 21:39:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:17,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171288931] [2024-06-21 21:39:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:17,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:20,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171288931] [2024-06-21 21:39:20,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171288931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:20,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:20,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820531822] [2024-06-21 21:39:20,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:20,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:20,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 315 transitions, 4524 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:20,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:20,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:20,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:21,978 INFO L124 PetriNetUnfolderBase]: 3210/4856 cut-off events. [2024-06-21 21:39:21,978 INFO L125 PetriNetUnfolderBase]: For 327127/327270 co-relation queries the response was YES. [2024-06-21 21:39:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47552 conditions, 4856 events. 3210/4856 cut-off events. For 327127/327270 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25104 event pairs, 625 based on Foata normal form. 52/4849 useless extension candidates. Maximal degree in co-relation 47441. Up to 4421 conditions per place. [2024-06-21 21:39:22,036 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 258 selfloop transitions, 51 changer transitions 0/360 dead transitions. [2024-06-21 21:39:22,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 360 transitions, 5549 flow [2024-06-21 21:39:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:39:22,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:39:22,038 INFO L175 Difference]: Start difference. First operand has 216 places, 315 transitions, 4524 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:39:22,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 360 transitions, 5549 flow [2024-06-21 21:39:22,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 360 transitions, 5449 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:22,411 INFO L231 Difference]: Finished difference. Result has 219 places, 316 transitions, 4563 flow [2024-06-21 21:39:22,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4563, PETRI_PLACES=219, PETRI_TRANSITIONS=316} [2024-06-21 21:39:22,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 21:39:22,412 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 316 transitions, 4563 flow [2024-06-21 21:39:22,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:22,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:22,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:22,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:39:22,412 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:22,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1933595846, now seen corresponding path program 9 times [2024-06-21 21:39:22,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:22,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137737536] [2024-06-21 21:39:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:24,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:24,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137737536] [2024-06-21 21:39:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137737536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:24,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:24,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972098524] [2024-06-21 21:39:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:24,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 316 transitions, 4563 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:24,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:24,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:24,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:26,404 INFO L124 PetriNetUnfolderBase]: 3339/5021 cut-off events. [2024-06-21 21:39:26,404 INFO L125 PetriNetUnfolderBase]: For 318879/318928 co-relation queries the response was YES. [2024-06-21 21:39:26,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48840 conditions, 5021 events. 3339/5021 cut-off events. For 318879/318928 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25673 event pairs, 694 based on Foata normal form. 40/5057 useless extension candidates. Maximal degree in co-relation 48727. Up to 4772 conditions per place. [2024-06-21 21:39:26,465 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 311 selfloop transitions, 55 changer transitions 0/369 dead transitions. [2024-06-21 21:39:26,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 369 transitions, 5571 flow [2024-06-21 21:39:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-21 21:39:26,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-21 21:39:26,467 INFO L175 Difference]: Start difference. First operand has 219 places, 316 transitions, 4563 flow. Second operand 11 states and 171 transitions. [2024-06-21 21:39:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 369 transitions, 5571 flow [2024-06-21 21:39:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 369 transitions, 5426 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:26,816 INFO L231 Difference]: Finished difference. Result has 223 places, 323 transitions, 4693 flow [2024-06-21 21:39:26,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4693, PETRI_PLACES=223, PETRI_TRANSITIONS=323} [2024-06-21 21:39:26,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 21:39:26,817 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 323 transitions, 4693 flow [2024-06-21 21:39:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:26,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:26,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:26,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:39:26,818 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:26,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1705694696, now seen corresponding path program 10 times [2024-06-21 21:39:26,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:26,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162054242] [2024-06-21 21:39:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:26,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162054242] [2024-06-21 21:39:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162054242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:29,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530690783] [2024-06-21 21:39:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:29,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:29,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:29,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:29,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 323 transitions, 4693 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:29,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:29,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:29,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:31,124 INFO L124 PetriNetUnfolderBase]: 3324/5000 cut-off events. [2024-06-21 21:39:31,124 INFO L125 PetriNetUnfolderBase]: For 322464/322513 co-relation queries the response was YES. [2024-06-21 21:39:31,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48475 conditions, 5000 events. 3324/5000 cut-off events. For 322464/322513 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25581 event pairs, 692 based on Foata normal form. 40/5036 useless extension candidates. Maximal degree in co-relation 48361. Up to 4751 conditions per place. [2024-06-21 21:39:31,177 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 308 selfloop transitions, 50 changer transitions 0/361 dead transitions. [2024-06-21 21:39:31,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 361 transitions, 5562 flow [2024-06-21 21:39:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:39:31,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 21:39:31,179 INFO L175 Difference]: Start difference. First operand has 223 places, 323 transitions, 4693 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:39:31,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 361 transitions, 5562 flow [2024-06-21 21:39:31,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 361 transitions, 5289 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:31,549 INFO L231 Difference]: Finished difference. Result has 224 places, 325 transitions, 4582 flow [2024-06-21 21:39:31,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4582, PETRI_PLACES=224, PETRI_TRANSITIONS=325} [2024-06-21 21:39:31,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 21:39:31,549 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 325 transitions, 4582 flow [2024-06-21 21:39:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:31,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:31,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:39:31,550 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:31,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1705701640, now seen corresponding path program 3 times [2024-06-21 21:39:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:31,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816656592] [2024-06-21 21:39:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816656592] [2024-06-21 21:39:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816656592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:34,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142889833] [2024-06-21 21:39:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:34,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:34,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 325 transitions, 4582 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:34,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:34,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:34,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:35,952 INFO L124 PetriNetUnfolderBase]: 3344/5032 cut-off events. [2024-06-21 21:39:35,953 INFO L125 PetriNetUnfolderBase]: For 330031/330080 co-relation queries the response was YES. [2024-06-21 21:39:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48418 conditions, 5032 events. 3344/5032 cut-off events. For 330031/330080 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25764 event pairs, 690 based on Foata normal form. 38/5066 useless extension candidates. Maximal degree in co-relation 48305. Up to 4833 conditions per place. [2024-06-21 21:39:36,012 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 38 changer transitions 0/357 dead transitions. [2024-06-21 21:39:36,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 357 transitions, 5416 flow [2024-06-21 21:39:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:39:36,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:39:36,014 INFO L175 Difference]: Start difference. First operand has 224 places, 325 transitions, 4582 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:39:36,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 357 transitions, 5416 flow [2024-06-21 21:39:36,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 357 transitions, 5283 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:36,435 INFO L231 Difference]: Finished difference. Result has 225 places, 327 transitions, 4578 flow [2024-06-21 21:39:36,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4578, PETRI_PLACES=225, PETRI_TRANSITIONS=327} [2024-06-21 21:39:36,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 21:39:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 327 transitions, 4578 flow [2024-06-21 21:39:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:36,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:36,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:36,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:39:36,437 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:36,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1942173670, now seen corresponding path program 4 times [2024-06-21 21:39:36,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:36,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106588423] [2024-06-21 21:39:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:38,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:38,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106588423] [2024-06-21 21:39:38,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106588423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:38,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:38,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:38,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687970846] [2024-06-21 21:39:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:38,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:39,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:39,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 327 transitions, 4578 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:39,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:39,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:39,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:40,703 INFO L124 PetriNetUnfolderBase]: 3336/5020 cut-off events. [2024-06-21 21:39:40,704 INFO L125 PetriNetUnfolderBase]: For 335538/335587 co-relation queries the response was YES. [2024-06-21 21:39:40,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48413 conditions, 5020 events. 3336/5020 cut-off events. For 335538/335587 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25672 event pairs, 637 based on Foata normal form. 38/5054 useless extension candidates. Maximal degree in co-relation 48299. Up to 4727 conditions per place. [2024-06-21 21:39:40,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 45 changer transitions 0/360 dead transitions. [2024-06-21 21:39:40,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 360 transitions, 5424 flow [2024-06-21 21:39:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:39:40,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:39:40,758 INFO L175 Difference]: Start difference. First operand has 225 places, 327 transitions, 4578 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:39:40,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 360 transitions, 5424 flow [2024-06-21 21:39:41,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 360 transitions, 5317 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:41,129 INFO L231 Difference]: Finished difference. Result has 227 places, 329 transitions, 4618 flow [2024-06-21 21:39:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4618, PETRI_PLACES=227, PETRI_TRANSITIONS=329} [2024-06-21 21:39:41,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 21:39:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 329 transitions, 4618 flow [2024-06-21 21:39:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:41,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:41,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:39:41,130 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:41,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1396307639, now seen corresponding path program 1 times [2024-06-21 21:39:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027662747] [2024-06-21 21:39:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027662747] [2024-06-21 21:39:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027662747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:42,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:39:42,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260093780] [2024-06-21 21:39:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:42,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:39:42,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:39:42,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:39:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:42,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 329 transitions, 4618 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:42,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:42,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:42,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:43,761 INFO L124 PetriNetUnfolderBase]: 3224/4838 cut-off events. [2024-06-21 21:39:43,761 INFO L125 PetriNetUnfolderBase]: For 333970/334019 co-relation queries the response was YES. [2024-06-21 21:39:43,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47122 conditions, 4838 events. 3224/4838 cut-off events. For 333970/334019 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24442 event pairs, 672 based on Foata normal form. 38/4872 useless extension candidates. Maximal degree in co-relation 47007. Up to 4761 conditions per place. [2024-06-21 21:39:43,815 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 25 changer transitions 0/339 dead transitions. [2024-06-21 21:39:43,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 339 transitions, 5318 flow [2024-06-21 21:39:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:39:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:39:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 21:39:43,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:39:43,817 INFO L175 Difference]: Start difference. First operand has 227 places, 329 transitions, 4618 flow. Second operand 5 states and 82 transitions. [2024-06-21 21:39:43,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 339 transitions, 5318 flow [2024-06-21 21:39:44,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 339 transitions, 5193 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:44,327 INFO L231 Difference]: Finished difference. Result has 226 places, 329 transitions, 4555 flow [2024-06-21 21:39:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4555, PETRI_PLACES=226, PETRI_TRANSITIONS=329} [2024-06-21 21:39:44,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 21:39:44,328 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 329 transitions, 4555 flow [2024-06-21 21:39:44,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:44,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:44,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:39:44,329 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:44,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1198204435, now seen corresponding path program 1 times [2024-06-21 21:39:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:44,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887642585] [2024-06-21 21:39:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887642585] [2024-06-21 21:39:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887642585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:47,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510263739] [2024-06-21 21:39:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:47,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:47,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:47,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 329 transitions, 4555 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:47,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:47,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:47,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:49,742 INFO L124 PetriNetUnfolderBase]: 3485/5265 cut-off events. [2024-06-21 21:39:49,743 INFO L125 PetriNetUnfolderBase]: For 395920/395942 co-relation queries the response was YES. [2024-06-21 21:39:49,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51552 conditions, 5265 events. 3485/5265 cut-off events. For 395920/395942 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27272 event pairs, 480 based on Foata normal form. 38/5301 useless extension candidates. Maximal degree in co-relation 51436. Up to 3771 conditions per place. [2024-06-21 21:39:49,804 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 303 selfloop transitions, 105 changer transitions 0/411 dead transitions. [2024-06-21 21:39:49,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 411 transitions, 6207 flow [2024-06-21 21:39:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:39:49,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 21:39:49,806 INFO L175 Difference]: Start difference. First operand has 226 places, 329 transitions, 4555 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:39:49,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 411 transitions, 6207 flow [2024-06-21 21:39:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 411 transitions, 6126 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:50,335 INFO L231 Difference]: Finished difference. Result has 234 places, 339 transitions, 4997 flow [2024-06-21 21:39:50,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4997, PETRI_PLACES=234, PETRI_TRANSITIONS=339} [2024-06-21 21:39:50,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 21:39:50,336 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 339 transitions, 4997 flow [2024-06-21 21:39:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:50,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:50,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:39:50,336 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:50,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash -739600143, now seen corresponding path program 2 times [2024-06-21 21:39:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:50,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887516613] [2024-06-21 21:39:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:50,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887516613] [2024-06-21 21:39:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887516613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004603851] [2024-06-21 21:39:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:53,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:53,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:39:53,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 339 transitions, 4997 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:53,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:53,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:39:53,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:55,590 INFO L124 PetriNetUnfolderBase]: 3593/5445 cut-off events. [2024-06-21 21:39:55,590 INFO L125 PetriNetUnfolderBase]: For 424092/424114 co-relation queries the response was YES. [2024-06-21 21:39:55,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54150 conditions, 5445 events. 3593/5445 cut-off events. For 424092/424114 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28623 event pairs, 690 based on Foata normal form. 46/5489 useless extension candidates. Maximal degree in co-relation 54032. Up to 4601 conditions per place. [2024-06-21 21:39:55,657 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 290 selfloop transitions, 107 changer transitions 0/400 dead transitions. [2024-06-21 21:39:55,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 400 transitions, 6080 flow [2024-06-21 21:39:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:39:55,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:39:55,659 INFO L175 Difference]: Start difference. First operand has 234 places, 339 transitions, 4997 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:39:55,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 400 transitions, 6080 flow [2024-06-21 21:39:56,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 400 transitions, 5954 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:56,364 INFO L231 Difference]: Finished difference. Result has 240 places, 341 transitions, 5167 flow [2024-06-21 21:39:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5167, PETRI_PLACES=240, PETRI_TRANSITIONS=341} [2024-06-21 21:39:56,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 21:39:56,364 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 341 transitions, 5167 flow [2024-06-21 21:39:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:56,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:56,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:39:56,365 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:56,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -739603863, now seen corresponding path program 3 times [2024-06-21 21:39:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:56,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727579354] [2024-06-21 21:39:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727579354] [2024-06-21 21:40:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727579354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:00,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:00,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:00,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59866516] [2024-06-21 21:40:00,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:00,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:00,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:00,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:00,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 341 transitions, 5167 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:00,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:00,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:00,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:02,197 INFO L124 PetriNetUnfolderBase]: 3661/5561 cut-off events. [2024-06-21 21:40:02,198 INFO L125 PetriNetUnfolderBase]: For 432252/432274 co-relation queries the response was YES. [2024-06-21 21:40:02,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55582 conditions, 5561 events. 3661/5561 cut-off events. For 432252/432274 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29505 event pairs, 690 based on Foata normal form. 38/5597 useless extension candidates. Maximal degree in co-relation 55462. Up to 4583 conditions per place. [2024-06-21 21:40:02,255 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 107 changer transitions 0/407 dead transitions. [2024-06-21 21:40:02,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 407 transitions, 6320 flow [2024-06-21 21:40:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 21:40:02,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:40:02,257 INFO L175 Difference]: Start difference. First operand has 240 places, 341 transitions, 5167 flow. Second operand 10 states and 183 transitions. [2024-06-21 21:40:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 407 transitions, 6320 flow [2024-06-21 21:40:02,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 407 transitions, 6069 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:02,876 INFO L231 Difference]: Finished difference. Result has 243 places, 344 transitions, 5235 flow [2024-06-21 21:40:02,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5235, PETRI_PLACES=243, PETRI_TRANSITIONS=344} [2024-06-21 21:40:02,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 21:40:02,876 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 344 transitions, 5235 flow [2024-06-21 21:40:02,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:02,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:02,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:40:02,877 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:02,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash -652912053, now seen corresponding path program 4 times [2024-06-21 21:40:02,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966940169] [2024-06-21 21:40:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966940169] [2024-06-21 21:40:05,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966940169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:05,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:05,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:05,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646076387] [2024-06-21 21:40:05,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:05,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:05,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:05,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:05,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 344 transitions, 5235 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:05,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:05,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:05,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:07,888 INFO L124 PetriNetUnfolderBase]: 3853/5879 cut-off events. [2024-06-21 21:40:07,889 INFO L125 PetriNetUnfolderBase]: For 475999/476019 co-relation queries the response was YES. [2024-06-21 21:40:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58812 conditions, 5879 events. 3853/5879 cut-off events. For 475999/476019 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 31862 event pairs, 753 based on Foata normal form. 36/5913 useless extension candidates. Maximal degree in co-relation 58690. Up to 5308 conditions per place. [2024-06-21 21:40:08,083 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 33 changer transitions 0/407 dead transitions. [2024-06-21 21:40:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 407 transitions, 6600 flow [2024-06-21 21:40:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:40:08,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 21:40:08,084 INFO L175 Difference]: Start difference. First operand has 243 places, 344 transitions, 5235 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:40:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 407 transitions, 6600 flow [2024-06-21 21:40:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 407 transitions, 6435 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:40:08,790 INFO L231 Difference]: Finished difference. Result has 248 places, 348 transitions, 5274 flow [2024-06-21 21:40:08,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5274, PETRI_PLACES=248, PETRI_TRANSITIONS=348} [2024-06-21 21:40:08,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:40:08,790 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 348 transitions, 5274 flow [2024-06-21 21:40:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:08,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:08,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:08,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:40:08,791 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:08,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -652764183, now seen corresponding path program 5 times [2024-06-21 21:40:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97999036] [2024-06-21 21:40:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:08,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:12,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97999036] [2024-06-21 21:40:12,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97999036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:12,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:12,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225854778] [2024-06-21 21:40:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:12,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:12,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 348 transitions, 5274 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:12,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:12,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:12,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:14,584 INFO L124 PetriNetUnfolderBase]: 3941/6027 cut-off events. [2024-06-21 21:40:14,584 INFO L125 PetriNetUnfolderBase]: For 499576/499596 co-relation queries the response was YES. [2024-06-21 21:40:14,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60085 conditions, 6027 events. 3941/6027 cut-off events. For 499576/499596 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32971 event pairs, 809 based on Foata normal form. 40/6065 useless extension candidates. Maximal degree in co-relation 59960. Up to 5727 conditions per place. [2024-06-21 21:40:14,653 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 27 changer transitions 0/402 dead transitions. [2024-06-21 21:40:14,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 402 transitions, 6306 flow [2024-06-21 21:40:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:40:14,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:40:14,655 INFO L175 Difference]: Start difference. First operand has 248 places, 348 transitions, 5274 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:40:14,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 402 transitions, 6306 flow [2024-06-21 21:40:15,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 402 transitions, 6250 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:40:15,543 INFO L231 Difference]: Finished difference. Result has 252 places, 349 transitions, 5319 flow [2024-06-21 21:40:15,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5218, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5319, PETRI_PLACES=252, PETRI_TRANSITIONS=349} [2024-06-21 21:40:15,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 21:40:15,543 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 349 transitions, 5319 flow [2024-06-21 21:40:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:15,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:15,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:40:15,549 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:15,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash -652908333, now seen corresponding path program 6 times [2024-06-21 21:40:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:15,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338934518] [2024-06-21 21:40:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:18,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:18,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338934518] [2024-06-21 21:40:18,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338934518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:18,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:18,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:18,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445632637] [2024-06-21 21:40:18,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:19,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:19,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 349 transitions, 5319 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:19,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:19,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:19,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:20,949 INFO L124 PetriNetUnfolderBase]: 3973/6087 cut-off events. [2024-06-21 21:40:20,949 INFO L125 PetriNetUnfolderBase]: For 504438/504458 co-relation queries the response was YES. [2024-06-21 21:40:20,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60311 conditions, 6087 events. 3973/6087 cut-off events. For 504438/504458 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33506 event pairs, 807 based on Foata normal form. 40/6125 useless extension candidates. Maximal degree in co-relation 60184. Up to 5748 conditions per place. [2024-06-21 21:40:21,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 370 selfloop transitions, 31 changer transitions 0/404 dead transitions. [2024-06-21 21:40:21,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 404 transitions, 6363 flow [2024-06-21 21:40:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:40:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 21:40:21,029 INFO L175 Difference]: Start difference. First operand has 252 places, 349 transitions, 5319 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:40:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 404 transitions, 6363 flow [2024-06-21 21:40:21,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 404 transitions, 6298 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:21,868 INFO L231 Difference]: Finished difference. Result has 254 places, 350 transitions, 5365 flow [2024-06-21 21:40:21,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5254, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5365, PETRI_PLACES=254, PETRI_TRANSITIONS=350} [2024-06-21 21:40:21,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 21:40:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 350 transitions, 5365 flow [2024-06-21 21:40:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:21,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:21,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:21,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:40:21,869 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:21,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1368135067, now seen corresponding path program 1 times [2024-06-21 21:40:21,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:21,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329123864] [2024-06-21 21:40:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:21,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329123864] [2024-06-21 21:40:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329123864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:25,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:25,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822907381] [2024-06-21 21:40:25,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:25,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:25,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:25,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 350 transitions, 5365 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:25,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:25,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:25,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:27,375 INFO L124 PetriNetUnfolderBase]: 3957/6065 cut-off events. [2024-06-21 21:40:27,375 INFO L125 PetriNetUnfolderBase]: For 493623/493645 co-relation queries the response was YES. [2024-06-21 21:40:27,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59882 conditions, 6065 events. 3957/6065 cut-off events. For 493623/493645 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33391 event pairs, 869 based on Foata normal form. 28/6091 useless extension candidates. Maximal degree in co-relation 59754. Up to 5811 conditions per place. [2024-06-21 21:40:27,442 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 45 changer transitions 0/389 dead transitions. [2024-06-21 21:40:27,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 389 transitions, 6277 flow [2024-06-21 21:40:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:40:27,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 21:40:27,444 INFO L175 Difference]: Start difference. First operand has 254 places, 350 transitions, 5365 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:40:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 389 transitions, 6277 flow [2024-06-21 21:40:28,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 389 transitions, 6202 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:28,158 INFO L231 Difference]: Finished difference. Result has 255 places, 351 transitions, 5425 flow [2024-06-21 21:40:28,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=255, PETRI_TRANSITIONS=351} [2024-06-21 21:40:28,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 21:40:28,159 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 351 transitions, 5425 flow [2024-06-21 21:40:28,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:28,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:28,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:40:28,160 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:28,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash 397143177, now seen corresponding path program 2 times [2024-06-21 21:40:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852418657] [2024-06-21 21:40:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:28,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:30,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852418657] [2024-06-21 21:40:30,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852418657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:30,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:30,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128258556] [2024-06-21 21:40:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:30,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 351 transitions, 5425 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:30,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:30,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:33,002 INFO L124 PetriNetUnfolderBase]: 3977/6097 cut-off events. [2024-06-21 21:40:33,003 INFO L125 PetriNetUnfolderBase]: For 502843/502865 co-relation queries the response was YES. [2024-06-21 21:40:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60433 conditions, 6097 events. 3977/6097 cut-off events. For 502843/502865 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33709 event pairs, 867 based on Foata normal form. 24/6119 useless extension candidates. Maximal degree in co-relation 60304. Up to 5870 conditions per place. [2024-06-21 21:40:33,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 40 changer transitions 0/392 dead transitions. [2024-06-21 21:40:33,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 392 transitions, 6375 flow [2024-06-21 21:40:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:40:33,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 21:40:33,072 INFO L175 Difference]: Start difference. First operand has 255 places, 351 transitions, 5425 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:40:33,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 392 transitions, 6375 flow [2024-06-21 21:40:33,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 392 transitions, 6240 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:33,836 INFO L231 Difference]: Finished difference. Result has 257 places, 353 transitions, 5445 flow [2024-06-21 21:40:33,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=257, PETRI_TRANSITIONS=353} [2024-06-21 21:40:33,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 21:40:33,837 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 353 transitions, 5445 flow [2024-06-21 21:40:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:33,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:33,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:33,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:40:33,838 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:33,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1368342829, now seen corresponding path program 7 times [2024-06-21 21:40:33,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:33,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078517121] [2024-06-21 21:40:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:36,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:36,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078517121] [2024-06-21 21:40:36,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078517121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:36,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:36,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:36,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060554548] [2024-06-21 21:40:36,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:36,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:36,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 353 transitions, 5445 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:36,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:36,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:36,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:38,838 INFO L124 PetriNetUnfolderBase]: 4133/6361 cut-off events. [2024-06-21 21:40:38,838 INFO L125 PetriNetUnfolderBase]: For 568843/568865 co-relation queries the response was YES. [2024-06-21 21:40:38,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 6361 events. 4133/6361 cut-off events. For 568843/568865 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35594 event pairs, 909 based on Foata normal form. 56/6415 useless extension candidates. Maximal degree in co-relation 62018. Up to 5786 conditions per place. [2024-06-21 21:40:38,923 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 52 changer transitions 0/403 dead transitions. [2024-06-21 21:40:38,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 403 transitions, 6492 flow [2024-06-21 21:40:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:40:38,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:40:38,925 INFO L175 Difference]: Start difference. First operand has 257 places, 353 transitions, 5445 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:40:38,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 403 transitions, 6492 flow [2024-06-21 21:40:39,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 403 transitions, 6363 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:39,727 INFO L231 Difference]: Finished difference. Result has 260 places, 355 transitions, 5507 flow [2024-06-21 21:40:39,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5316, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5507, PETRI_PLACES=260, PETRI_TRANSITIONS=355} [2024-06-21 21:40:39,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 21:40:39,728 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 355 transitions, 5507 flow [2024-06-21 21:40:39,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:39,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:39,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:39,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:40:39,729 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:39,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1473018075, now seen corresponding path program 3 times [2024-06-21 21:40:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:39,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693794439] [2024-06-21 21:40:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:39,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:42,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:42,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693794439] [2024-06-21 21:40:42,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693794439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:42,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:42,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:42,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345862332] [2024-06-21 21:40:42,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:42,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:42,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:42,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:42,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 355 transitions, 5507 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:42,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:42,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:42,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:44,611 INFO L124 PetriNetUnfolderBase]: 4125/6349 cut-off events. [2024-06-21 21:40:44,611 INFO L125 PetriNetUnfolderBase]: For 533245/533267 co-relation queries the response was YES. [2024-06-21 21:40:44,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62053 conditions, 6349 events. 4125/6349 cut-off events. For 533245/533267 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35632 event pairs, 909 based on Foata normal form. 24/6371 useless extension candidates. Maximal degree in co-relation 61922. Up to 6084 conditions per place. [2024-06-21 21:40:44,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 49 changer transitions 0/395 dead transitions. [2024-06-21 21:40:44,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 395 transitions, 6443 flow [2024-06-21 21:40:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:40:44,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:40:44,689 INFO L175 Difference]: Start difference. First operand has 260 places, 355 transitions, 5507 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:40:44,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 395 transitions, 6443 flow [2024-06-21 21:40:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 395 transitions, 6321 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:45,435 INFO L231 Difference]: Finished difference. Result has 261 places, 356 transitions, 5532 flow [2024-06-21 21:40:45,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5532, PETRI_PLACES=261, PETRI_TRANSITIONS=356} [2024-06-21 21:40:45,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 21:40:45,436 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 356 transitions, 5532 flow [2024-06-21 21:40:45,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:45,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:45,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:45,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:40:45,436 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:45,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1473012123, now seen corresponding path program 8 times [2024-06-21 21:40:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:45,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933485653] [2024-06-21 21:40:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933485653] [2024-06-21 21:40:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933485653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:48,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:48,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135662069] [2024-06-21 21:40:48,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:48,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:48,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:48,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 356 transitions, 5532 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:50,879 INFO L124 PetriNetUnfolderBase]: 4213/6497 cut-off events. [2024-06-21 21:40:50,880 INFO L125 PetriNetUnfolderBase]: For 574763/574785 co-relation queries the response was YES. [2024-06-21 21:40:50,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63162 conditions, 6497 events. 4213/6497 cut-off events. For 574763/574785 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 36739 event pairs, 847 based on Foata normal form. 40/6535 useless extension candidates. Maximal degree in co-relation 63030. Up to 5585 conditions per place. [2024-06-21 21:40:50,953 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 299 selfloop transitions, 120 changer transitions 0/422 dead transitions. [2024-06-21 21:40:50,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 422 transitions, 6895 flow [2024-06-21 21:40:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 21:40:50,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:40:50,955 INFO L175 Difference]: Start difference. First operand has 261 places, 356 transitions, 5532 flow. Second operand 11 states and 198 transitions. [2024-06-21 21:40:50,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 422 transitions, 6895 flow [2024-06-21 21:40:51,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 422 transitions, 6750 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:51,760 INFO L231 Difference]: Finished difference. Result has 265 places, 357 transitions, 5675 flow [2024-06-21 21:40:51,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5675, PETRI_PLACES=265, PETRI_TRANSITIONS=357} [2024-06-21 21:40:51,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 21:40:51,761 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 357 transitions, 5675 flow [2024-06-21 21:40:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:51,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:40:51,761 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:51,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash 391417725, now seen corresponding path program 9 times [2024-06-21 21:40:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717350110] [2024-06-21 21:40:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717350110] [2024-06-21 21:40:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717350110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:54,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386814452] [2024-06-21 21:40:54,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:54,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:40:54,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 357 transitions, 5675 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:54,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:54,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:40:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:56,759 INFO L124 PetriNetUnfolderBase]: 4501/6985 cut-off events. [2024-06-21 21:40:56,759 INFO L125 PetriNetUnfolderBase]: For 628340/628362 co-relation queries the response was YES. [2024-06-21 21:40:56,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67998 conditions, 6985 events. 4501/6985 cut-off events. For 628340/628362 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40601 event pairs, 974 based on Foata normal form. 38/7021 useless extension candidates. Maximal degree in co-relation 67865. Up to 5951 conditions per place. [2024-06-21 21:40:56,856 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 358 selfloop transitions, 61 changer transitions 0/422 dead transitions. [2024-06-21 21:40:56,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 422 transitions, 7135 flow [2024-06-21 21:40:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 21:40:56,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 21:40:56,858 INFO L175 Difference]: Start difference. First operand has 265 places, 357 transitions, 5675 flow. Second operand 11 states and 186 transitions. [2024-06-21 21:40:56,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 422 transitions, 7135 flow [2024-06-21 21:40:58,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 422 transitions, 6962 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:58,030 INFO L231 Difference]: Finished difference. Result has 269 places, 362 transitions, 5800 flow [2024-06-21 21:40:58,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5800, PETRI_PLACES=269, PETRI_TRANSITIONS=362} [2024-06-21 21:40:58,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 21:40:58,031 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 362 transitions, 5800 flow [2024-06-21 21:40:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:58,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:58,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:58,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:40:58,032 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:58,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1373849359, now seen corresponding path program 10 times [2024-06-21 21:40:58,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:58,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373555022] [2024-06-21 21:40:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373555022] [2024-06-21 21:41:00,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373555022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:00,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101349484] [2024-06-21 21:41:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:00,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:00,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 362 transitions, 5800 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:00,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:00,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:00,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:03,110 INFO L124 PetriNetUnfolderBase]: 4513/7013 cut-off events. [2024-06-21 21:41:03,110 INFO L125 PetriNetUnfolderBase]: For 640745/640767 co-relation queries the response was YES. [2024-06-21 21:41:03,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67033 conditions, 7013 events. 4513/7013 cut-off events. For 640745/640767 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 40918 event pairs, 1005 based on Foata normal form. 52/7063 useless extension candidates. Maximal degree in co-relation 66898. Up to 6272 conditions per place. [2024-06-21 21:41:03,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 350 selfloop transitions, 66 changer transitions 0/419 dead transitions. [2024-06-21 21:41:03,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 419 transitions, 6923 flow [2024-06-21 21:41:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:41:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:41:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 21:41:03,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:41:03,203 INFO L175 Difference]: Start difference. First operand has 269 places, 362 transitions, 5800 flow. Second operand 11 states and 187 transitions. [2024-06-21 21:41:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 419 transitions, 6923 flow [2024-06-21 21:41:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 419 transitions, 6790 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:04,235 INFO L231 Difference]: Finished difference. Result has 273 places, 364 transitions, 5903 flow [2024-06-21 21:41:04,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5903, PETRI_PLACES=273, PETRI_TRANSITIONS=364} [2024-06-21 21:41:04,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:41:04,236 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 364 transitions, 5903 flow [2024-06-21 21:41:04,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:04,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:04,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:04,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:41:04,237 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:04,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -841433529, now seen corresponding path program 4 times [2024-06-21 21:41:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:04,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322741543] [2024-06-21 21:41:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322741543] [2024-06-21 21:41:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322741543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:07,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057048218] [2024-06-21 21:41:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:07,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:07,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 364 transitions, 5903 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:07,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:07,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:07,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:09,858 INFO L124 PetriNetUnfolderBase]: 4553/7077 cut-off events. [2024-06-21 21:41:09,858 INFO L125 PetriNetUnfolderBase]: For 618139/618188 co-relation queries the response was YES. [2024-06-21 21:41:09,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67995 conditions, 7077 events. 4553/7077 cut-off events. For 618139/618188 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41461 event pairs, 1031 based on Foata normal form. 42/7115 useless extension candidates. Maximal degree in co-relation 67858. Up to 6823 conditions per place. [2024-06-21 21:41:09,953 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 48 changer transitions 0/403 dead transitions. [2024-06-21 21:41:09,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 403 transitions, 6925 flow [2024-06-21 21:41:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:41:09,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 21:41:09,955 INFO L175 Difference]: Start difference. First operand has 273 places, 364 transitions, 5903 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:41:09,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 403 transitions, 6925 flow [2024-06-21 21:41:10,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 403 transitions, 6766 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:41:10,884 INFO L231 Difference]: Finished difference. Result has 273 places, 367 transitions, 5972 flow [2024-06-21 21:41:10,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=273, PETRI_TRANSITIONS=367} [2024-06-21 21:41:10,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:41:10,885 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 367 transitions, 5972 flow [2024-06-21 21:41:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:10,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:10,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:41:10,886 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:10,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -188068939, now seen corresponding path program 11 times [2024-06-21 21:41:10,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:10,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786340824] [2024-06-21 21:41:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786340824] [2024-06-21 21:41:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786340824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:13,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323035708] [2024-06-21 21:41:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:13,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 367 transitions, 5972 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:13,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:13,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:13,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:16,449 INFO L124 PetriNetUnfolderBase]: 4709/7341 cut-off events. [2024-06-21 21:41:16,450 INFO L125 PetriNetUnfolderBase]: For 672625/672674 co-relation queries the response was YES. [2024-06-21 21:41:16,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 7341 events. 4709/7341 cut-off events. For 672625/672674 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 43623 event pairs, 1063 based on Foata normal form. 70/7407 useless extension candidates. Maximal degree in co-relation 69596. Up to 6766 conditions per place. [2024-06-21 21:41:16,536 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 55 changer transitions 0/415 dead transitions. [2024-06-21 21:41:16,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 7054 flow [2024-06-21 21:41:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:41:16,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 21:41:16,538 INFO L175 Difference]: Start difference. First operand has 273 places, 367 transitions, 5972 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:41:16,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 7054 flow [2024-06-21 21:41:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 415 transitions, 6857 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:17,530 INFO L231 Difference]: Finished difference. Result has 276 places, 369 transitions, 5984 flow [2024-06-21 21:41:17,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5984, PETRI_PLACES=276, PETRI_TRANSITIONS=369} [2024-06-21 21:41:17,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:41:17,530 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 369 transitions, 5984 flow [2024-06-21 21:41:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:17,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:41:17,531 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:17,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -187853737, now seen corresponding path program 5 times [2024-06-21 21:41:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656381384] [2024-06-21 21:41:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:20,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656381384] [2024-06-21 21:41:20,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656381384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:20,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:20,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:20,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257551322] [2024-06-21 21:41:20,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 369 transitions, 5984 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:20,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:23,487 INFO L124 PetriNetUnfolderBase]: 4729/7373 cut-off events. [2024-06-21 21:41:23,487 INFO L125 PetriNetUnfolderBase]: For 633748/633797 co-relation queries the response was YES. [2024-06-21 21:41:23,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69981 conditions, 7373 events. 4729/7373 cut-off events. For 633748/633797 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43904 event pairs, 1069 based on Foata normal form. 38/7407 useless extension candidates. Maximal degree in co-relation 69842. Up to 7146 conditions per place. [2024-06-21 21:41:23,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 41 changer transitions 0/407 dead transitions. [2024-06-21 21:41:23,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 407 transitions, 6964 flow [2024-06-21 21:41:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:41:23,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:41:23,579 INFO L175 Difference]: Start difference. First operand has 276 places, 369 transitions, 5984 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:41:23,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 407 transitions, 6964 flow [2024-06-21 21:41:24,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 407 transitions, 6828 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:41:24,734 INFO L231 Difference]: Finished difference. Result has 277 places, 371 transitions, 6013 flow [2024-06-21 21:41:24,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6013, PETRI_PLACES=277, PETRI_TRANSITIONS=371} [2024-06-21 21:41:24,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 21:41:24,735 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 371 transitions, 6013 flow [2024-06-21 21:41:24,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:24,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:24,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:24,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:41:24,736 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:24,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -271643877, now seen corresponding path program 12 times [2024-06-21 21:41:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:24,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094754146] [2024-06-21 21:41:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094754146] [2024-06-21 21:41:27,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094754146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:27,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:27,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403046213] [2024-06-21 21:41:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:27,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:27,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:27,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:27,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 371 transitions, 6013 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:27,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:27,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:30,261 INFO L124 PetriNetUnfolderBase]: 4865/7605 cut-off events. [2024-06-21 21:41:30,261 INFO L125 PetriNetUnfolderBase]: For 695466/695515 co-relation queries the response was YES. [2024-06-21 21:41:30,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72240 conditions, 7605 events. 4865/7605 cut-off events. For 695466/695515 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45650 event pairs, 1075 based on Foata normal form. 50/7651 useless extension candidates. Maximal degree in co-relation 72100. Up to 6260 conditions per place. [2024-06-21 21:41:30,366 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 86 changer transitions 0/428 dead transitions. [2024-06-21 21:41:30,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 428 transitions, 7525 flow [2024-06-21 21:41:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 21:41:30,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:41:30,368 INFO L175 Difference]: Start difference. First operand has 277 places, 371 transitions, 6013 flow. Second operand 10 states and 170 transitions. [2024-06-21 21:41:30,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 428 transitions, 7525 flow [2024-06-21 21:41:31,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 428 transitions, 7388 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:31,919 INFO L231 Difference]: Finished difference. Result has 281 places, 375 transitions, 6238 flow [2024-06-21 21:41:31,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6238, PETRI_PLACES=281, PETRI_TRANSITIONS=375} [2024-06-21 21:41:31,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 21:41:31,920 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 375 transitions, 6238 flow [2024-06-21 21:41:31,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:31,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:31,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:31,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:41:31,920 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:31,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:31,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1337137765, now seen corresponding path program 6 times [2024-06-21 21:41:31,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753396016] [2024-06-21 21:41:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:34,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:34,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753396016] [2024-06-21 21:41:34,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753396016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:34,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573576430] [2024-06-21 21:41:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:34,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:34,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:34,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 375 transitions, 6238 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:34,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:34,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:34,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:37,244 INFO L124 PetriNetUnfolderBase]: 4877/7625 cut-off events. [2024-06-21 21:41:37,244 INFO L125 PetriNetUnfolderBase]: For 699063/699112 co-relation queries the response was YES. [2024-06-21 21:41:37,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72808 conditions, 7625 events. 4877/7625 cut-off events. For 699063/699112 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45894 event pairs, 1127 based on Foata normal form. 42/7663 useless extension candidates. Maximal degree in co-relation 72666. Up to 7371 conditions per place. [2024-06-21 21:41:37,356 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 47 changer transitions 0/414 dead transitions. [2024-06-21 21:41:37,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 414 transitions, 7296 flow [2024-06-21 21:41:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:41:37,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:41:37,358 INFO L175 Difference]: Start difference. First operand has 281 places, 375 transitions, 6238 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:41:37,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 414 transitions, 7296 flow [2024-06-21 21:41:38,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 414 transitions, 7151 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:38,598 INFO L231 Difference]: Finished difference. Result has 284 places, 378 transitions, 6333 flow [2024-06-21 21:41:38,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6333, PETRI_PLACES=284, PETRI_TRANSITIONS=378} [2024-06-21 21:41:38,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:41:38,598 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 378 transitions, 6333 flow [2024-06-21 21:41:38,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:38,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:38,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:38,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:41:38,599 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:38,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 77843543, now seen corresponding path program 7 times [2024-06-21 21:41:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:38,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778551815] [2024-06-21 21:41:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:41,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778551815] [2024-06-21 21:41:41,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778551815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:41,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:41,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:41,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118900998] [2024-06-21 21:41:41,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:41,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:41,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:41,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:41,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 378 transitions, 6333 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:41,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:41,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:41,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:43,641 INFO L124 PetriNetUnfolderBase]: 4897/7657 cut-off events. [2024-06-21 21:41:43,641 INFO L125 PetriNetUnfolderBase]: For 706978/707027 co-relation queries the response was YES. [2024-06-21 21:41:43,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73410 conditions, 7657 events. 4897/7657 cut-off events. For 706978/707027 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 46027 event pairs, 1032 based on Foata normal form. 38/7691 useless extension candidates. Maximal degree in co-relation 73266. Up to 7336 conditions per place. [2024-06-21 21:41:43,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 47 changer transitions 0/417 dead transitions. [2024-06-21 21:41:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 417 transitions, 7339 flow [2024-06-21 21:41:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:41:43,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:41:43,729 INFO L175 Difference]: Start difference. First operand has 284 places, 378 transitions, 6333 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:41:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 417 transitions, 7339 flow [2024-06-21 21:41:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 417 transitions, 7144 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:44,771 INFO L231 Difference]: Finished difference. Result has 286 places, 380 transitions, 6319 flow [2024-06-21 21:41:44,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6138, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6319, PETRI_PLACES=286, PETRI_TRANSITIONS=380} [2024-06-21 21:41:44,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 21:41:44,772 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 380 transitions, 6319 flow [2024-06-21 21:41:44,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:44,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:41:44,772 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:44,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1331423473, now seen corresponding path program 13 times [2024-06-21 21:41:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445717822] [2024-06-21 21:41:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:47,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:47,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445717822] [2024-06-21 21:41:47,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445717822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:47,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:47,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943355515] [2024-06-21 21:41:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:47,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:47,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:47,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 380 transitions, 6319 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:47,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:47,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:47,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:50,147 INFO L124 PetriNetUnfolderBase]: 5025/7860 cut-off events. [2024-06-21 21:41:50,148 INFO L125 PetriNetUnfolderBase]: For 768960/769009 co-relation queries the response was YES. [2024-06-21 21:41:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75282 conditions, 7860 events. 5025/7860 cut-off events. For 768960/769009 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 47643 event pairs, 1121 based on Foata normal form. 54/7910 useless extension candidates. Maximal degree in co-relation 75137. Up to 7097 conditions per place. [2024-06-21 21:41:50,262 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 348 selfloop transitions, 107 changer transitions 0/458 dead transitions. [2024-06-21 21:41:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 458 transitions, 8240 flow [2024-06-21 21:41:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:41:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:41:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 21:41:50,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 21:41:50,264 INFO L175 Difference]: Start difference. First operand has 286 places, 380 transitions, 6319 flow. Second operand 12 states and 203 transitions. [2024-06-21 21:41:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 458 transitions, 8240 flow [2024-06-21 21:41:51,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 458 transitions, 8087 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:51,677 INFO L231 Difference]: Finished difference. Result has 293 places, 395 transitions, 6826 flow [2024-06-21 21:41:51,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6166, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6826, PETRI_PLACES=293, PETRI_TRANSITIONS=395} [2024-06-21 21:41:51,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 21:41:51,678 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 395 transitions, 6826 flow [2024-06-21 21:41:51,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:51,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:51,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:41:51,678 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:51,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1337145205, now seen corresponding path program 8 times [2024-06-21 21:41:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194330439] [2024-06-21 21:41:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194330439] [2024-06-21 21:41:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194330439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:54,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:54,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:54,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240466349] [2024-06-21 21:41:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:41:54,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 395 transitions, 6826 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:41:54,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:57,452 INFO L124 PetriNetUnfolderBase]: 5017/7848 cut-off events. [2024-06-21 21:41:57,452 INFO L125 PetriNetUnfolderBase]: For 758963/759012 co-relation queries the response was YES. [2024-06-21 21:41:57,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77050 conditions, 7848 events. 5017/7848 cut-off events. For 758963/759012 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 47643 event pairs, 1142 based on Foata normal form. 38/7882 useless extension candidates. Maximal degree in co-relation 76902. Up to 7621 conditions per place. [2024-06-21 21:41:57,563 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 40 changer transitions 0/432 dead transitions. [2024-06-21 21:41:57,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 432 transitions, 7831 flow [2024-06-21 21:41:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 21:41:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:41:57,564 INFO L175 Difference]: Start difference. First operand has 293 places, 395 transitions, 6826 flow. Second operand 9 states and 144 transitions. [2024-06-21 21:41:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 432 transitions, 7831 flow [2024-06-21 21:41:59,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 432 transitions, 7635 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:59,108 INFO L231 Difference]: Finished difference. Result has 295 places, 396 transitions, 6766 flow [2024-06-21 21:41:59,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6766, PETRI_PLACES=295, PETRI_TRANSITIONS=396} [2024-06-21 21:41:59,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 21:41:59,108 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 396 transitions, 6766 flow [2024-06-21 21:41:59,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:59,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:59,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:59,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:41:59,109 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:59,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1336930003, now seen corresponding path program 14 times [2024-06-21 21:41:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:59,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762636406] [2024-06-21 21:41:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762636406] [2024-06-21 21:42:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762636406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:02,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:02,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020746545] [2024-06-21 21:42:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:02,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:02,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:02,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:02,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 396 transitions, 6766 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:02,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:02,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:02,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:04,801 INFO L124 PetriNetUnfolderBase]: 5077/7952 cut-off events. [2024-06-21 21:42:04,802 INFO L125 PetriNetUnfolderBase]: For 811857/811906 co-relation queries the response was YES. [2024-06-21 21:42:04,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76696 conditions, 7952 events. 5077/7952 cut-off events. For 811857/811906 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 48511 event pairs, 1142 based on Foata normal form. 70/8018 useless extension candidates. Maximal degree in co-relation 76546. Up to 7377 conditions per place. [2024-06-21 21:42:04,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 54 changer transitions 0/443 dead transitions. [2024-06-21 21:42:04,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 443 transitions, 7883 flow [2024-06-21 21:42:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:42:04,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:42:04,912 INFO L175 Difference]: Start difference. First operand has 295 places, 396 transitions, 6766 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:42:04,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 443 transitions, 7883 flow [2024-06-21 21:42:06,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 443 transitions, 7740 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:42:06,307 INFO L231 Difference]: Finished difference. Result has 298 places, 397 transitions, 6795 flow [2024-06-21 21:42:06,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6623, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6795, PETRI_PLACES=298, PETRI_TRANSITIONS=397} [2024-06-21 21:42:06,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 21:42:06,308 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 397 transitions, 6795 flow [2024-06-21 21:42:06,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:06,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:06,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:42:06,308 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:06,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1331573575, now seen corresponding path program 9 times [2024-06-21 21:42:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:06,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6075652] [2024-06-21 21:42:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:06,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:09,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:09,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6075652] [2024-06-21 21:42:09,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6075652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:09,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:09,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232313365] [2024-06-21 21:42:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:09,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:09,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:09,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:09,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 397 transitions, 6795 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:09,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:09,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:09,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:11,737 INFO L124 PetriNetUnfolderBase]: 5033/7884 cut-off events. [2024-06-21 21:42:11,738 INFO L125 PetriNetUnfolderBase]: For 750097/750146 co-relation queries the response was YES. [2024-06-21 21:42:11,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74598 conditions, 7884 events. 5033/7884 cut-off events. For 750097/750146 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47991 event pairs, 1120 based on Foata normal form. 58/7938 useless extension candidates. Maximal degree in co-relation 74447. Up to 7400 conditions per place. [2024-06-21 21:42:11,849 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 379 selfloop transitions, 64 changer transitions 0/446 dead transitions. [2024-06-21 21:42:11,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 446 transitions, 7962 flow [2024-06-21 21:42:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:42:11,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:42:11,851 INFO L175 Difference]: Start difference. First operand has 298 places, 397 transitions, 6795 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:42:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 446 transitions, 7962 flow [2024-06-21 21:42:13,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 446 transitions, 7764 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 21:42:13,521 INFO L231 Difference]: Finished difference. Result has 299 places, 398 transitions, 6786 flow [2024-06-21 21:42:13,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6611, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6786, PETRI_PLACES=299, PETRI_TRANSITIONS=398} [2024-06-21 21:42:13,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 21:42:13,522 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 398 transitions, 6786 flow [2024-06-21 21:42:13,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:13,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:13,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:13,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:42:13,522 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:13,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -34290127, now seen corresponding path program 1 times [2024-06-21 21:42:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:13,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851479217] [2024-06-21 21:42:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:18,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:18,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851479217] [2024-06-21 21:42:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851479217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:18,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:42:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488986701] [2024-06-21 21:42:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:42:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:42:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:42:18,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:18,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 398 transitions, 6786 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:18,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:18,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:18,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:21,404 INFO L124 PetriNetUnfolderBase]: 5013/7852 cut-off events. [2024-06-21 21:42:21,405 INFO L125 PetriNetUnfolderBase]: For 703318/703340 co-relation queries the response was YES. [2024-06-21 21:42:21,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73233 conditions, 7852 events. 5013/7852 cut-off events. For 703318/703340 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 47784 event pairs, 1030 based on Foata normal form. 34/7884 useless extension candidates. Maximal degree in co-relation 73082. Up to 7403 conditions per place. [2024-06-21 21:42:21,509 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 379 selfloop transitions, 70 changer transitions 0/452 dead transitions. [2024-06-21 21:42:21,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 452 transitions, 7902 flow [2024-06-21 21:42:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:42:21,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:42:21,510 INFO L175 Difference]: Start difference. First operand has 299 places, 398 transitions, 6786 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:42:21,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 452 transitions, 7902 flow [2024-06-21 21:42:23,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 452 transitions, 7735 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 21:42:23,120 INFO L231 Difference]: Finished difference. Result has 301 places, 399 transitions, 6809 flow [2024-06-21 21:42:23,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6809, PETRI_PLACES=301, PETRI_TRANSITIONS=399} [2024-06-21 21:42:23,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 21:42:23,121 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 399 transitions, 6809 flow [2024-06-21 21:42:23,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:23,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:23,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:42:23,122 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:23,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 537718471, now seen corresponding path program 2 times [2024-06-21 21:42:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942416505] [2024-06-21 21:42:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:23,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:25,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942416505] [2024-06-21 21:42:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942416505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:25,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:25,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986491651] [2024-06-21 21:42:25,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:25,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:25,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:25,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 399 transitions, 6809 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:25,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:25,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:28,350 INFO L124 PetriNetUnfolderBase]: 5061/7936 cut-off events. [2024-06-21 21:42:28,350 INFO L125 PetriNetUnfolderBase]: For 721574/721596 co-relation queries the response was YES. [2024-06-21 21:42:28,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73839 conditions, 7936 events. 5061/7936 cut-off events. For 721574/721596 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 48535 event pairs, 1122 based on Foata normal form. 32/7966 useless extension candidates. Maximal degree in co-relation 73687. Up to 7625 conditions per place. [2024-06-21 21:42:28,475 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 41 changer transitions 0/447 dead transitions. [2024-06-21 21:42:28,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 447 transitions, 7877 flow [2024-06-21 21:42:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:42:28,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:42:28,477 INFO L175 Difference]: Start difference. First operand has 301 places, 399 transitions, 6809 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:42:28,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 447 transitions, 7877 flow [2024-06-21 21:42:30,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 447 transitions, 7690 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:42:30,172 INFO L231 Difference]: Finished difference. Result has 304 places, 400 transitions, 6750 flow [2024-06-21 21:42:30,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6750, PETRI_PLACES=304, PETRI_TRANSITIONS=400} [2024-06-21 21:42:30,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:42:30,173 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 400 transitions, 6750 flow [2024-06-21 21:42:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:30,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:30,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:30,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:42:30,174 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:30,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 324015747, now seen corresponding path program 3 times [2024-06-21 21:42:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773035317] [2024-06-21 21:42:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773035317] [2024-06-21 21:42:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773035317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:42:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595580052] [2024-06-21 21:42:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:33,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:42:33,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:42:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:42:34,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:34,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 400 transitions, 6750 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:34,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:34,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:34,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:36,718 INFO L124 PetriNetUnfolderBase]: 5109/8020 cut-off events. [2024-06-21 21:42:36,718 INFO L125 PetriNetUnfolderBase]: For 739607/739656 co-relation queries the response was YES. [2024-06-21 21:42:36,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74221 conditions, 8020 events. 5109/8020 cut-off events. For 739607/739656 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 49274 event pairs, 1134 based on Foata normal form. 46/8062 useless extension candidates. Maximal degree in co-relation 74068. Up to 7709 conditions per place. [2024-06-21 21:42:36,851 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 42 changer transitions 0/445 dead transitions. [2024-06-21 21:42:36,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 445 transitions, 7808 flow [2024-06-21 21:42:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 21:42:36,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-21 21:42:36,853 INFO L175 Difference]: Start difference. First operand has 304 places, 400 transitions, 6750 flow. Second operand 10 states and 157 transitions. [2024-06-21 21:42:36,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 445 transitions, 7808 flow [2024-06-21 21:42:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 445 transitions, 7696 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:42:38,648 INFO L231 Difference]: Finished difference. Result has 306 places, 401 transitions, 6770 flow [2024-06-21 21:42:38,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6638, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6770, PETRI_PLACES=306, PETRI_TRANSITIONS=401} [2024-06-21 21:42:38,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 21:42:38,649 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 401 transitions, 6770 flow [2024-06-21 21:42:38,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:38,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:38,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:38,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:42:38,650 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815515, now seen corresponding path program 4 times [2024-06-21 21:42:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089183871] [2024-06-21 21:42:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089183871] [2024-06-21 21:42:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089183871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:41,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:41,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904813918] [2024-06-21 21:42:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:41,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 401 transitions, 6770 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:41,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:41,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:41,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:43,743 INFO L124 PetriNetUnfolderBase]: 5157/8104 cut-off events. [2024-06-21 21:42:43,743 INFO L125 PetriNetUnfolderBase]: For 757400/757449 co-relation queries the response was YES. [2024-06-21 21:42:43,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74811 conditions, 8104 events. 5157/8104 cut-off events. For 757400/757449 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49811 event pairs, 1023 based on Foata normal form. 46/8146 useless extension candidates. Maximal degree in co-relation 74657. Up to 7699 conditions per place. [2024-06-21 21:42:43,866 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 397 selfloop transitions, 52 changer transitions 0/452 dead transitions. [2024-06-21 21:42:43,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 452 transitions, 7860 flow [2024-06-21 21:42:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:42:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:42:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-21 21:42:43,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-21 21:42:43,868 INFO L175 Difference]: Start difference. First operand has 306 places, 401 transitions, 6770 flow. Second operand 11 states and 171 transitions. [2024-06-21 21:42:43,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 452 transitions, 7860 flow [2024-06-21 21:42:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 452 transitions, 7744 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:42:45,822 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 6808 flow [2024-06-21 21:42:45,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6808, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-21 21:42:45,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 21:42:45,823 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 6808 flow [2024-06-21 21:42:45,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:45,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:45,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:42:45,823 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:45,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1498169657, now seen corresponding path program 5 times [2024-06-21 21:42:45,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:45,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860481985] [2024-06-21 21:42:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860481985] [2024-06-21 21:42:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860481985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:49,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:49,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:42:49,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350883865] [2024-06-21 21:42:49,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:49,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:42:49,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:42:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:42:49,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:49,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 6808 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:49,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:49,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:49,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:52,177 INFO L124 PetriNetUnfolderBase]: 5137/8072 cut-off events. [2024-06-21 21:42:52,177 INFO L125 PetriNetUnfolderBase]: For 741810/741859 co-relation queries the response was YES. [2024-06-21 21:42:52,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73853 conditions, 8072 events. 5137/8072 cut-off events. For 741810/741859 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49720 event pairs, 1140 based on Foata normal form. 46/8114 useless extension candidates. Maximal degree in co-relation 73698. Up to 7761 conditions per place. [2024-06-21 21:42:52,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 41 changer transitions 0/445 dead transitions. [2024-06-21 21:42:52,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 445 transitions, 7680 flow [2024-06-21 21:42:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 21:42:52,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-21 21:42:52,275 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 6808 flow. Second operand 10 states and 158 transitions. [2024-06-21 21:42:52,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 445 transitions, 7680 flow [2024-06-21 21:42:53,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 445 transitions, 7542 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 21:42:53,731 INFO L231 Difference]: Finished difference. Result has 309 places, 401 transitions, 6610 flow [2024-06-21 21:42:53,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6610, PETRI_PLACES=309, PETRI_TRANSITIONS=401} [2024-06-21 21:42:53,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 21:42:53,732 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 401 transitions, 6610 flow [2024-06-21 21:42:53,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:53,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:53,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:53,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:42:53,733 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:53,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1999276850, now seen corresponding path program 1 times [2024-06-21 21:42:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:53,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818762476] [2024-06-21 21:42:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818762476] [2024-06-21 21:42:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818762476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820235697] [2024-06-21 21:42:55,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:55,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:42:55,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 401 transitions, 6610 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:55,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:42:55,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:58,152 INFO L124 PetriNetUnfolderBase]: 5147/8087 cut-off events. [2024-06-21 21:42:58,153 INFO L125 PetriNetUnfolderBase]: For 732508/732508 co-relation queries the response was YES. [2024-06-21 21:42:58,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73946 conditions, 8087 events. 5147/8087 cut-off events. For 732508/732508 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49868 event pairs, 1169 based on Foata normal form. 2/8087 useless extension candidates. Maximal degree in co-relation 73790. Up to 8010 conditions per place. [2024-06-21 21:42:58,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 404 selfloop transitions, 23 changer transitions 0/430 dead transitions. [2024-06-21 21:42:58,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 430 transitions, 7850 flow [2024-06-21 21:42:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 21:42:58,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 21:42:58,271 INFO L175 Difference]: Start difference. First operand has 309 places, 401 transitions, 6610 flow. Second operand 7 states and 109 transitions. [2024-06-21 21:42:58,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 430 transitions, 7850 flow [2024-06-21 21:42:59,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 7732 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 21:42:59,937 INFO L231 Difference]: Finished difference. Result has 308 places, 407 transitions, 6707 flow [2024-06-21 21:42:59,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6707, PETRI_PLACES=308, PETRI_TRANSITIONS=407} [2024-06-21 21:42:59,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 21:42:59,938 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 407 transitions, 6707 flow [2024-06-21 21:42:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:59,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:59,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:42:59,939 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:59,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1999156694, now seen corresponding path program 1 times [2024-06-21 21:42:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:59,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678428151] [2024-06-21 21:42:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:01,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:01,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678428151] [2024-06-21 21:43:01,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678428151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:01,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968237999] [2024-06-21 21:43:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:01,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:01,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 407 transitions, 6707 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:04,319 INFO L124 PetriNetUnfolderBase]: 5192/8149 cut-off events. [2024-06-21 21:43:04,319 INFO L125 PetriNetUnfolderBase]: For 756998/757047 co-relation queries the response was YES. [2024-06-21 21:43:04,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74741 conditions, 8149 events. 5192/8149 cut-off events. For 756998/757047 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50239 event pairs, 1168 based on Foata normal form. 38/8183 useless extension candidates. Maximal degree in co-relation 74584. Up to 7942 conditions per place. [2024-06-21 21:43:04,443 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 62 changer transitions 0/445 dead transitions. [2024-06-21 21:43:04,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 445 transitions, 8071 flow [2024-06-21 21:43:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:43:04,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 21:43:04,444 INFO L175 Difference]: Start difference. First operand has 308 places, 407 transitions, 6707 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:43:04,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 445 transitions, 8071 flow [2024-06-21 21:43:06,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 445 transitions, 7977 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:06,199 INFO L231 Difference]: Finished difference. Result has 313 places, 425 transitions, 7023 flow [2024-06-21 21:43:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6616, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7023, PETRI_PLACES=313, PETRI_TRANSITIONS=425} [2024-06-21 21:43:06,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 21:43:06,199 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 425 transitions, 7023 flow [2024-06-21 21:43:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:43:06,200 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:06,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1828454450, now seen corresponding path program 2 times [2024-06-21 21:43:06,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373593057] [2024-06-21 21:43:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:06,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:08,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373593057] [2024-06-21 21:43:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373593057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:08,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:08,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745029618] [2024-06-21 21:43:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:08,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 425 transitions, 7023 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:10,729 INFO L124 PetriNetUnfolderBase]: 5202/8164 cut-off events. [2024-06-21 21:43:10,729 INFO L125 PetriNetUnfolderBase]: For 768152/768152 co-relation queries the response was YES. [2024-06-21 21:43:10,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75218 conditions, 8164 events. 5202/8164 cut-off events. For 768152/768152 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50356 event pairs, 1165 based on Foata normal form. 2/8164 useless extension candidates. Maximal degree in co-relation 75058. Up to 8119 conditions per place. [2024-06-21 21:43:10,836 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 424 selfloop transitions, 19 changer transitions 0/446 dead transitions. [2024-06-21 21:43:10,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 446 transitions, 8050 flow [2024-06-21 21:43:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-21 21:43:10,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-21 21:43:10,838 INFO L175 Difference]: Start difference. First operand has 313 places, 425 transitions, 7023 flow. Second operand 7 states and 102 transitions. [2024-06-21 21:43:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 446 transitions, 8050 flow [2024-06-21 21:43:12,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 446 transitions, 7953 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:12,440 INFO L231 Difference]: Finished difference. Result has 317 places, 429 transitions, 7063 flow [2024-06-21 21:43:12,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7063, PETRI_PLACES=317, PETRI_TRANSITIONS=429} [2024-06-21 21:43:12,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:43:12,441 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 429 transitions, 7063 flow [2024-06-21 21:43:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:12,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:12,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:43:12,442 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:12,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1555325606, now seen corresponding path program 2 times [2024-06-21 21:43:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2971491] [2024-06-21 21:43:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:12,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:14,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:14,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2971491] [2024-06-21 21:43:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2971491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:14,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312517269] [2024-06-21 21:43:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:14,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:14,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 429 transitions, 7063 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:14,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:14,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:14,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:16,665 INFO L124 PetriNetUnfolderBase]: 5222/8194 cut-off events. [2024-06-21 21:43:16,665 INFO L125 PetriNetUnfolderBase]: For 792915/792978 co-relation queries the response was YES. [2024-06-21 21:43:16,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75520 conditions, 8194 events. 5222/8194 cut-off events. For 792915/792978 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 50583 event pairs, 1189 based on Foata normal form. 46/8236 useless extension candidates. Maximal degree in co-relation 75359. Up to 7972 conditions per place. [2024-06-21 21:43:16,794 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 377 selfloop transitions, 69 changer transitions 0/449 dead transitions. [2024-06-21 21:43:16,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 449 transitions, 8266 flow [2024-06-21 21:43:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:43:16,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:43:16,795 INFO L175 Difference]: Start difference. First operand has 317 places, 429 transitions, 7063 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:43:16,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 449 transitions, 8266 flow [2024-06-21 21:43:18,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 449 transitions, 8180 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:18,591 INFO L231 Difference]: Finished difference. Result has 319 places, 436 transitions, 7239 flow [2024-06-21 21:43:18,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6977, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7239, PETRI_PLACES=319, PETRI_TRANSITIONS=436} [2024-06-21 21:43:18,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 21:43:18,592 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 436 transitions, 7239 flow [2024-06-21 21:43:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:18,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:43:18,592 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:18,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -491501060, now seen corresponding path program 3 times [2024-06-21 21:43:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813851527] [2024-06-21 21:43:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813851527] [2024-06-21 21:43:20,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813851527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:20,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:20,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640477352] [2024-06-21 21:43:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:20,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:20,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:20,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 436 transitions, 7239 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:20,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:20,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:23,061 INFO L124 PetriNetUnfolderBase]: 5178/8123 cut-off events. [2024-06-21 21:43:23,062 INFO L125 PetriNetUnfolderBase]: For 794284/794333 co-relation queries the response was YES. [2024-06-21 21:43:23,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74939 conditions, 8123 events. 5178/8123 cut-off events. For 794284/794333 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50062 event pairs, 1160 based on Foata normal form. 38/8157 useless extension candidates. Maximal degree in co-relation 74777. Up to 7913 conditions per place. [2024-06-21 21:43:23,162 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 380 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-21 21:43:23,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 452 transitions, 8187 flow [2024-06-21 21:43:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:43:23,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:43:23,164 INFO L175 Difference]: Start difference. First operand has 319 places, 436 transitions, 7239 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:43:23,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 452 transitions, 8187 flow [2024-06-21 21:43:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 452 transitions, 7999 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:24,782 INFO L231 Difference]: Finished difference. Result has 321 places, 436 transitions, 7211 flow [2024-06-21 21:43:24,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7211, PETRI_PLACES=321, PETRI_TRANSITIONS=436} [2024-06-21 21:43:24,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 21:43:24,783 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 436 transitions, 7211 flow [2024-06-21 21:43:24,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:24,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:24,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:24,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:43:24,783 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:24,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash -491501246, now seen corresponding path program 3 times [2024-06-21 21:43:24,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:24,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580460525] [2024-06-21 21:43:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580460525] [2024-06-21 21:43:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580460525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614075104] [2024-06-21 21:43:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:26,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:26,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 436 transitions, 7211 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:26,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:26,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:29,150 INFO L124 PetriNetUnfolderBase]: 5172/8116 cut-off events. [2024-06-21 21:43:29,150 INFO L125 PetriNetUnfolderBase]: For 796890/796890 co-relation queries the response was YES. [2024-06-21 21:43:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74915 conditions, 8116 events. 5172/8116 cut-off events. For 796890/796890 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49986 event pairs, 1158 based on Foata normal form. 2/8116 useless extension candidates. Maximal degree in co-relation 74753. Up to 8043 conditions per place. [2024-06-21 21:43:29,272 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 427 selfloop transitions, 26 changer transitions 0/456 dead transitions. [2024-06-21 21:43:29,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 456 transitions, 8181 flow [2024-06-21 21:43:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:43:29,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 21:43:29,274 INFO L175 Difference]: Start difference. First operand has 321 places, 436 transitions, 7211 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:43:29,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 456 transitions, 8181 flow [2024-06-21 21:43:31,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 456 transitions, 7946 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:31,261 INFO L231 Difference]: Finished difference. Result has 321 places, 436 transitions, 7044 flow [2024-06-21 21:43:31,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6976, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7044, PETRI_PLACES=321, PETRI_TRANSITIONS=436} [2024-06-21 21:43:31,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 21:43:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 436 transitions, 7044 flow [2024-06-21 21:43:31,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:31,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:31,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:31,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:43:31,262 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:31,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1555334534, now seen corresponding path program 1 times [2024-06-21 21:43:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:31,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257716974] [2024-06-21 21:43:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:33,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:33,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257716974] [2024-06-21 21:43:33,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257716974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:33,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:33,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:33,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528692993] [2024-06-21 21:43:33,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:33,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:33,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:33,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:33,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 436 transitions, 7044 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:33,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:33,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:33,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:35,637 INFO L124 PetriNetUnfolderBase]: 5175/8120 cut-off events. [2024-06-21 21:43:35,637 INFO L125 PetriNetUnfolderBase]: For 801014/801063 co-relation queries the response was YES. [2024-06-21 21:43:35,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74601 conditions, 8120 events. 5175/8120 cut-off events. For 801014/801063 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 49978 event pairs, 1151 based on Foata normal form. 38/8154 useless extension candidates. Maximal degree in co-relation 74438. Up to 8031 conditions per place. [2024-06-21 21:43:35,768 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 420 selfloop transitions, 28 changer transitions 0/451 dead transitions. [2024-06-21 21:43:35,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 451 transitions, 8025 flow [2024-06-21 21:43:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 21:43:35,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:43:35,770 INFO L175 Difference]: Start difference. First operand has 321 places, 436 transitions, 7044 flow. Second operand 6 states and 92 transitions. [2024-06-21 21:43:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 451 transitions, 8025 flow [2024-06-21 21:43:37,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 451 transitions, 7971 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:37,594 INFO L231 Difference]: Finished difference. Result has 322 places, 439 transitions, 7111 flow [2024-06-21 21:43:37,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7111, PETRI_PLACES=322, PETRI_TRANSITIONS=439} [2024-06-21 21:43:37,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 21:43:37,594 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 439 transitions, 7111 flow [2024-06-21 21:43:37,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:37,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:37,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:43:37,595 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:37,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1414299505, now seen corresponding path program 1 times [2024-06-21 21:43:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:37,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815485847] [2024-06-21 21:43:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815485847] [2024-06-21 21:43:39,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815485847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:39,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:39,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29032343] [2024-06-21 21:43:39,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:39,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:39,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 439 transitions, 7111 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:39,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:39,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:41,830 INFO L124 PetriNetUnfolderBase]: 5185/8134 cut-off events. [2024-06-21 21:43:41,830 INFO L125 PetriNetUnfolderBase]: For 783541/783590 co-relation queries the response was YES. [2024-06-21 21:43:41,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74992 conditions, 8134 events. 5185/8134 cut-off events. For 783541/783590 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 50115 event pairs, 1176 based on Foata normal form. 36/8166 useless extension candidates. Maximal degree in co-relation 74828. Up to 7990 conditions per place. [2024-06-21 21:43:41,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 42 changer transitions 0/473 dead transitions. [2024-06-21 21:43:41,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 473 transitions, 8573 flow [2024-06-21 21:43:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 21:43:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 21:43:41,939 INFO L175 Difference]: Start difference. First operand has 322 places, 439 transitions, 7111 flow. Second operand 7 states and 111 transitions. [2024-06-21 21:43:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 473 transitions, 8573 flow [2024-06-21 21:43:43,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 473 transitions, 8479 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:43,610 INFO L231 Difference]: Finished difference. Result has 326 places, 449 transitions, 7409 flow [2024-06-21 21:43:43,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7017, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7409, PETRI_PLACES=326, PETRI_TRANSITIONS=449} [2024-06-21 21:43:43,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 21:43:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 449 transitions, 7409 flow [2024-06-21 21:43:43,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:43:43,612 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:43,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2069737551, now seen corresponding path program 2 times [2024-06-21 21:43:43,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:43,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738337160] [2024-06-21 21:43:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738337160] [2024-06-21 21:43:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738337160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248403701] [2024-06-21 21:43:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:45,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:45,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 449 transitions, 7409 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:47,349 INFO L124 PetriNetUnfolderBase]: 5187/8137 cut-off events. [2024-06-21 21:43:47,349 INFO L125 PetriNetUnfolderBase]: For 802956/803002 co-relation queries the response was YES. [2024-06-21 21:43:47,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75568 conditions, 8137 events. 5187/8137 cut-off events. For 802956/803002 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 50147 event pairs, 1174 based on Foata normal form. 34/8167 useless extension candidates. Maximal degree in co-relation 75402. Up to 7994 conditions per place. [2024-06-21 21:43:47,470 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 425 selfloop transitions, 46 changer transitions 0/474 dead transitions. [2024-06-21 21:43:47,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 474 transitions, 8689 flow [2024-06-21 21:43:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:43:47,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:43:47,471 INFO L175 Difference]: Start difference. First operand has 326 places, 449 transitions, 7409 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:43:47,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 474 transitions, 8689 flow [2024-06-21 21:43:49,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 474 transitions, 8548 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-21 21:43:49,512 INFO L231 Difference]: Finished difference. Result has 330 places, 452 transitions, 7469 flow [2024-06-21 21:43:49,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7469, PETRI_PLACES=330, PETRI_TRANSITIONS=452} [2024-06-21 21:43:49,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 21:43:49,522 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 452 transitions, 7469 flow [2024-06-21 21:43:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:49,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:49,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:49,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:43:49,523 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:49,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1830969443, now seen corresponding path program 3 times [2024-06-21 21:43:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:49,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301654800] [2024-06-21 21:43:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:50,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:50,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301654800] [2024-06-21 21:43:50,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301654800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:50,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:50,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:43:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274650066] [2024-06-21 21:43:50,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:50,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:43:50,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:43:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:43:51,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:51,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 452 transitions, 7469 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:51,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:51,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:51,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:53,232 INFO L124 PetriNetUnfolderBase]: 5181/8129 cut-off events. [2024-06-21 21:43:53,233 INFO L125 PetriNetUnfolderBase]: For 811782/811828 co-relation queries the response was YES. [2024-06-21 21:43:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75496 conditions, 8129 events. 5181/8129 cut-off events. For 811782/811828 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 50107 event pairs, 1171 based on Foata normal form. 34/8159 useless extension candidates. Maximal degree in co-relation 75328. Up to 8057 conditions per place. [2024-06-21 21:43:53,362 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 25 changer transitions 0/464 dead transitions. [2024-06-21 21:43:53,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 464 transitions, 8430 flow [2024-06-21 21:43:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-21 21:43:53,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:43:53,364 INFO L175 Difference]: Start difference. First operand has 330 places, 452 transitions, 7469 flow. Second operand 6 states and 90 transitions. [2024-06-21 21:43:53,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 464 transitions, 8430 flow [2024-06-21 21:43:55,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 464 transitions, 8230 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:55,375 INFO L231 Difference]: Finished difference. Result has 332 places, 452 transitions, 7327 flow [2024-06-21 21:43:55,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7269, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7327, PETRI_PLACES=332, PETRI_TRANSITIONS=452} [2024-06-21 21:43:55,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 21:43:55,376 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 452 transitions, 7327 flow [2024-06-21 21:43:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:55,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:55,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:43:55,377 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:55,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1581390653, now seen corresponding path program 1 times [2024-06-21 21:43:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:55,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649612961] [2024-06-21 21:43:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:58,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649612961] [2024-06-21 21:43:58,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649612961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:58,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:58,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965722285] [2024-06-21 21:43:58,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:58,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:58,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:43:58,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 452 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:58,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:58,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:43:58,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:01,131 INFO L124 PetriNetUnfolderBase]: 5277/8263 cut-off events. [2024-06-21 21:44:01,132 INFO L125 PetriNetUnfolderBase]: For 853729/853775 co-relation queries the response was YES. [2024-06-21 21:44:01,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77164 conditions, 8263 events. 5277/8263 cut-off events. For 853729/853775 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 50916 event pairs, 1177 based on Foata normal form. 40/8299 useless extension candidates. Maximal degree in co-relation 76996. Up to 7725 conditions per place. [2024-06-21 21:44:01,253 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 92 changer transitions 0/494 dead transitions. [2024-06-21 21:44:01,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 494 transitions, 9128 flow [2024-06-21 21:44:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:44:01,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:44:01,255 INFO L175 Difference]: Start difference. First operand has 332 places, 452 transitions, 7327 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:44:01,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 494 transitions, 9128 flow [2024-06-21 21:44:03,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 494 transitions, 9025 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:03,118 INFO L231 Difference]: Finished difference. Result has 336 places, 463 transitions, 7748 flow [2024-06-21 21:44:03,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7748, PETRI_PLACES=336, PETRI_TRANSITIONS=463} [2024-06-21 21:44:03,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 21:44:03,119 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 463 transitions, 7748 flow [2024-06-21 21:44:03,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:03,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:03,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:44:03,119 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:03,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1844319117, now seen corresponding path program 2 times [2024-06-21 21:44:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955484603] [2024-06-21 21:44:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:05,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955484603] [2024-06-21 21:44:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955484603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:05,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213036419] [2024-06-21 21:44:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:05,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:05,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:05,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:05,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 463 transitions, 7748 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:05,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:05,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:05,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:07,964 INFO L124 PetriNetUnfolderBase]: 5405/8441 cut-off events. [2024-06-21 21:44:07,964 INFO L125 PetriNetUnfolderBase]: For 921164/921210 co-relation queries the response was YES. [2024-06-21 21:44:08,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81072 conditions, 8441 events. 5405/8441 cut-off events. For 921164/921210 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 52058 event pairs, 1200 based on Foata normal form. 40/8477 useless extension candidates. Maximal degree in co-relation 80903. Up to 8100 conditions per place. [2024-06-21 21:44:08,103 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 72 changer transitions 0/496 dead transitions. [2024-06-21 21:44:08,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 496 transitions, 9267 flow [2024-06-21 21:44:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:44:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:44:08,105 INFO L175 Difference]: Start difference. First operand has 336 places, 463 transitions, 7748 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:44:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 496 transitions, 9267 flow [2024-06-21 21:44:10,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 496 transitions, 9048 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-21 21:44:10,237 INFO L231 Difference]: Finished difference. Result has 341 places, 471 transitions, 7942 flow [2024-06-21 21:44:10,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7942, PETRI_PLACES=341, PETRI_TRANSITIONS=471} [2024-06-21 21:44:10,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 21:44:10,238 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 471 transitions, 7942 flow [2024-06-21 21:44:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:10,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:10,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:10,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:44:10,238 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:10,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1844313537, now seen corresponding path program 3 times [2024-06-21 21:44:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932467033] [2024-06-21 21:44:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932467033] [2024-06-21 21:44:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932467033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721669227] [2024-06-21 21:44:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:12,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 471 transitions, 7942 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:12,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:12,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:12,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:15,334 INFO L124 PetriNetUnfolderBase]: 5413/8453 cut-off events. [2024-06-21 21:44:15,334 INFO L125 PetriNetUnfolderBase]: For 928651/928697 co-relation queries the response was YES. [2024-06-21 21:44:15,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80917 conditions, 8453 events. 5413/8453 cut-off events. For 928651/928697 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 52119 event pairs, 1196 based on Foata normal form. 40/8489 useless extension candidates. Maximal degree in co-relation 80746. Up to 8112 conditions per place. [2024-06-21 21:44:15,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 81 changer transitions 0/503 dead transitions. [2024-06-21 21:44:15,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 503 transitions, 9357 flow [2024-06-21 21:44:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 21:44:15,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 21:44:15,465 INFO L175 Difference]: Start difference. First operand has 341 places, 471 transitions, 7942 flow. Second operand 10 states and 153 transitions. [2024-06-21 21:44:15,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 503 transitions, 9357 flow [2024-06-21 21:44:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 503 transitions, 9166 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 21:44:17,799 INFO L231 Difference]: Finished difference. Result has 347 places, 475 transitions, 8035 flow [2024-06-21 21:44:17,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7767, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8035, PETRI_PLACES=347, PETRI_TRANSITIONS=475} [2024-06-21 21:44:17,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 21:44:17,800 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 475 transitions, 8035 flow [2024-06-21 21:44:17,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:17,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:17,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:44:17,800 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:17,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1943332577, now seen corresponding path program 4 times [2024-06-21 21:44:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:17,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620355581] [2024-06-21 21:44:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:19,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620355581] [2024-06-21 21:44:19,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620355581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:19,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:19,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:19,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281342083] [2024-06-21 21:44:19,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:19,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:19,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:19,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 475 transitions, 8035 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:22,900 INFO L124 PetriNetUnfolderBase]: 5461/8521 cut-off events. [2024-06-21 21:44:22,900 INFO L125 PetriNetUnfolderBase]: For 946794/946840 co-relation queries the response was YES. [2024-06-21 21:44:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81710 conditions, 8521 events. 5461/8521 cut-off events. For 946794/946840 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 52534 event pairs, 1188 based on Foata normal form. 40/8557 useless extension candidates. Maximal degree in co-relation 81537. Up to 7943 conditions per place. [2024-06-21 21:44:23,011 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 100 changer transitions 0/506 dead transitions. [2024-06-21 21:44:23,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 506 transitions, 9488 flow [2024-06-21 21:44:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:44:23,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 21:44:23,012 INFO L175 Difference]: Start difference. First operand has 347 places, 475 transitions, 8035 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:44:23,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 506 transitions, 9488 flow [2024-06-21 21:44:25,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 506 transitions, 9268 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 21:44:25,345 INFO L231 Difference]: Finished difference. Result has 347 places, 480 transitions, 8235 flow [2024-06-21 21:44:25,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8235, PETRI_PLACES=347, PETRI_TRANSITIONS=480} [2024-06-21 21:44:25,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 21:44:25,345 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 480 transitions, 8235 flow [2024-06-21 21:44:25,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:25,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:25,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:25,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:44:25,346 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:25,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash 963103713, now seen corresponding path program 5 times [2024-06-21 21:44:25,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:25,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155393712] [2024-06-21 21:44:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:25,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155393712] [2024-06-21 21:44:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155393712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:27,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640476191] [2024-06-21 21:44:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:27,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:27,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 480 transitions, 8235 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:27,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:27,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:27,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:30,913 INFO L124 PetriNetUnfolderBase]: 5501/8577 cut-off events. [2024-06-21 21:44:30,914 INFO L125 PetriNetUnfolderBase]: For 970901/970947 co-relation queries the response was YES. [2024-06-21 21:44:31,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82895 conditions, 8577 events. 5501/8577 cut-off events. For 970901/970947 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52824 event pairs, 1196 based on Foata normal form. 40/8613 useless extension candidates. Maximal degree in co-relation 82720. Up to 7967 conditions per place. [2024-06-21 21:44:31,070 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 115 changer transitions 0/515 dead transitions. [2024-06-21 21:44:31,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 515 transitions, 9717 flow [2024-06-21 21:44:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:44:31,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:44:31,072 INFO L175 Difference]: Start difference. First operand has 347 places, 480 transitions, 8235 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:44:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 515 transitions, 9717 flow [2024-06-21 21:44:33,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 515 transitions, 9409 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:33,228 INFO L231 Difference]: Finished difference. Result has 351 places, 484 transitions, 8299 flow [2024-06-21 21:44:33,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8299, PETRI_PLACES=351, PETRI_TRANSITIONS=484} [2024-06-21 21:44:33,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 21:44:33,229 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 484 transitions, 8299 flow [2024-06-21 21:44:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:33,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:33,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:33,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:44:33,230 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:33,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash 970455363, now seen corresponding path program 6 times [2024-06-21 21:44:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:33,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140191537] [2024-06-21 21:44:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140191537] [2024-06-21 21:44:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140191537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:35,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:35,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950070877] [2024-06-21 21:44:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 484 transitions, 8299 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:38,040 INFO L124 PetriNetUnfolderBase]: 5509/8592 cut-off events. [2024-06-21 21:44:38,040 INFO L125 PetriNetUnfolderBase]: For 952067/952127 co-relation queries the response was YES. [2024-06-21 21:44:38,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82276 conditions, 8592 events. 5509/8592 cut-off events. For 952067/952127 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 53071 event pairs, 1207 based on Foata normal form. 54/8642 useless extension candidates. Maximal degree in co-relation 82100. Up to 7979 conditions per place. [2024-06-21 21:44:38,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 119 changer transitions 0/514 dead transitions. [2024-06-21 21:44:38,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 514 transitions, 9733 flow [2024-06-21 21:44:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:44:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:44:38,164 INFO L175 Difference]: Start difference. First operand has 351 places, 484 transitions, 8299 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:44:38,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 514 transitions, 9733 flow [2024-06-21 21:44:40,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 514 transitions, 9425 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:40,766 INFO L231 Difference]: Finished difference. Result has 353 places, 488 transitions, 8355 flow [2024-06-21 21:44:40,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8355, PETRI_PLACES=353, PETRI_TRANSITIONS=488} [2024-06-21 21:44:40,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 21:44:40,767 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 488 transitions, 8355 flow [2024-06-21 21:44:40,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:40,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:40,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:44:40,767 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:40,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash -303197931, now seen corresponding path program 1 times [2024-06-21 21:44:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513008754] [2024-06-21 21:44:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513008754] [2024-06-21 21:44:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513008754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:43,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264809299] [2024-06-21 21:44:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:43,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:43,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:43,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 488 transitions, 8355 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:43,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:43,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:43,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:45,919 INFO L124 PetriNetUnfolderBase]: 5532/8621 cut-off events. [2024-06-21 21:44:45,919 INFO L125 PetriNetUnfolderBase]: For 929868/929914 co-relation queries the response was YES. [2024-06-21 21:44:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82411 conditions, 8621 events. 5532/8621 cut-off events. For 929868/929914 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 53106 event pairs, 1208 based on Foata normal form. 34/8651 useless extension candidates. Maximal degree in co-relation 82234. Up to 8407 conditions per place. [2024-06-21 21:44:46,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 60 changer transitions 0/534 dead transitions. [2024-06-21 21:44:46,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 534 transitions, 9901 flow [2024-06-21 21:44:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 21:44:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 21:44:46,065 INFO L175 Difference]: Start difference. First operand has 353 places, 488 transitions, 8355 flow. Second operand 10 states and 153 transitions. [2024-06-21 21:44:46,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 534 transitions, 9901 flow [2024-06-21 21:44:48,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 534 transitions, 9589 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:48,869 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 8349 flow [2024-06-21 21:44:48,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8349, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-21 21:44:48,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 21:44:48,870 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 8349 flow [2024-06-21 21:44:48,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:48,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:48,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:44:48,871 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash -185107399, now seen corresponding path program 1 times [2024-06-21 21:44:48,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:48,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025833624] [2024-06-21 21:44:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:48,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:51,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:51,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025833624] [2024-06-21 21:44:51,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025833624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:51,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:51,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:51,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115502281] [2024-06-21 21:44:51,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:51,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:51,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:51,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:51,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:51,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:51,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 8349 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:51,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:51,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:54,182 INFO L124 PetriNetUnfolderBase]: 5606/8723 cut-off events. [2024-06-21 21:44:54,182 INFO L125 PetriNetUnfolderBase]: For 983186/983206 co-relation queries the response was YES. [2024-06-21 21:44:54,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84386 conditions, 8723 events. 5606/8723 cut-off events. For 983186/983206 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 53698 event pairs, 1258 based on Foata normal form. 20/8741 useless extension candidates. Maximal degree in co-relation 84207. Up to 7962 conditions per place. [2024-06-21 21:44:54,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 126 changer transitions 0/544 dead transitions. [2024-06-21 21:44:54,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 544 transitions, 10223 flow [2024-06-21 21:44:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:44:54,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:44:54,326 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 8349 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:44:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 544 transitions, 10223 flow [2024-06-21 21:44:56,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 544 transitions, 10087 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:56,932 INFO L231 Difference]: Finished difference. Result has 360 places, 507 transitions, 8754 flow [2024-06-21 21:44:56,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=360, PETRI_TRANSITIONS=507} [2024-06-21 21:44:56,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 21:44:56,932 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 507 transitions, 8754 flow [2024-06-21 21:44:56,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:56,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:56,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:44:56,933 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:56,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:56,933 INFO L85 PathProgramCache]: Analyzing trace with hash 273730133, now seen corresponding path program 2 times [2024-06-21 21:44:56,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330016124] [2024-06-21 21:44:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:59,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:59,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330016124] [2024-06-21 21:44:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330016124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:59,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:59,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:44:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103428358] [2024-06-21 21:44:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:44:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:44:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:44:59,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:44:59,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 507 transitions, 8754 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:59,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:59,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:44:59,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:02,252 INFO L124 PetriNetUnfolderBase]: 5600/8714 cut-off events. [2024-06-21 21:45:02,253 INFO L125 PetriNetUnfolderBase]: For 996390/996410 co-relation queries the response was YES. [2024-06-21 21:45:02,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84854 conditions, 8714 events. 5600/8714 cut-off events. For 996390/996410 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 53698 event pairs, 1226 based on Foata normal form. 22/8734 useless extension candidates. Maximal degree in co-relation 84673. Up to 8499 conditions per place. [2024-06-21 21:45:02,388 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 78 changer transitions 0/532 dead transitions. [2024-06-21 21:45:02,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 532 transitions, 9888 flow [2024-06-21 21:45:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:45:02,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:45:02,389 INFO L175 Difference]: Start difference. First operand has 360 places, 507 transitions, 8754 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:45:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 532 transitions, 9888 flow [2024-06-21 21:45:05,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 532 transitions, 9653 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:05,181 INFO L231 Difference]: Finished difference. Result has 364 places, 507 transitions, 8681 flow [2024-06-21 21:45:05,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8681, PETRI_PLACES=364, PETRI_TRANSITIONS=507} [2024-06-21 21:45:05,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 21:45:05,181 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 507 transitions, 8681 flow [2024-06-21 21:45:05,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:05,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:05,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:05,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:45:05,182 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:05,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 58602833, now seen corresponding path program 3 times [2024-06-21 21:45:05,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:05,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541835003] [2024-06-21 21:45:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:05,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:07,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541835003] [2024-06-21 21:45:07,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541835003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:07,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:07,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093268117] [2024-06-21 21:45:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:07,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:07,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:07,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 507 transitions, 8681 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:07,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:07,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:07,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:10,658 INFO L124 PetriNetUnfolderBase]: 5641/8771 cut-off events. [2024-06-21 21:45:10,658 INFO L125 PetriNetUnfolderBase]: For 1024625/1024645 co-relation queries the response was YES. [2024-06-21 21:45:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85493 conditions, 8771 events. 5641/8771 cut-off events. For 1024625/1024645 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 54045 event pairs, 1221 based on Foata normal form. 22/8791 useless extension candidates. Maximal degree in co-relation 85311. Up to 8530 conditions per place. [2024-06-21 21:45:10,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 91 changer transitions 0/546 dead transitions. [2024-06-21 21:45:10,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 546 transitions, 10398 flow [2024-06-21 21:45:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:45:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:45:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 21:45:10,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-21 21:45:10,814 INFO L175 Difference]: Start difference. First operand has 364 places, 507 transitions, 8681 flow. Second operand 9 states and 136 transitions. [2024-06-21 21:45:10,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 546 transitions, 10398 flow [2024-06-21 21:45:13,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 546 transitions, 10182 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:13,749 INFO L231 Difference]: Finished difference. Result has 370 places, 522 transitions, 9063 flow [2024-06-21 21:45:13,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9063, PETRI_PLACES=370, PETRI_TRANSITIONS=522} [2024-06-21 21:45:13,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 21:45:13,750 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 522 transitions, 9063 flow [2024-06-21 21:45:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:13,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:13,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:13,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:45:13,750 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1018390193, now seen corresponding path program 1 times [2024-06-21 21:45:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598838391] [2024-06-21 21:45:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:13,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598838391] [2024-06-21 21:45:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598838391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:15,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341114022] [2024-06-21 21:45:15,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:15,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:15,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:15,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 522 transitions, 9063 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:15,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:15,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:15,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:18,445 INFO L124 PetriNetUnfolderBase]: 5638/8768 cut-off events. [2024-06-21 21:45:18,445 INFO L125 PetriNetUnfolderBase]: For 1036422/1036465 co-relation queries the response was YES. [2024-06-21 21:45:18,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85643 conditions, 8768 events. 5638/8768 cut-off events. For 1036422/1036465 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 53979 event pairs, 1212 based on Foata normal form. 31/8795 useless extension candidates. Maximal degree in co-relation 85458. Up to 8679 conditions per place. [2024-06-21 21:45:18,583 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 498 selfloop transitions, 36 changer transitions 0/537 dead transitions. [2024-06-21 21:45:18,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 537 transitions, 10265 flow [2024-06-21 21:45:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 21:45:18,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:45:18,585 INFO L175 Difference]: Start difference. First operand has 370 places, 522 transitions, 9063 flow. Second operand 6 states and 92 transitions. [2024-06-21 21:45:18,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 537 transitions, 10265 flow [2024-06-21 21:45:21,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 537 transitions, 10089 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 21:45:21,402 INFO L231 Difference]: Finished difference. Result has 373 places, 525 transitions, 9072 flow [2024-06-21 21:45:21,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8887, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9072, PETRI_PLACES=373, PETRI_TRANSITIONS=525} [2024-06-21 21:45:21,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 21:45:21,403 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 525 transitions, 9072 flow [2024-06-21 21:45:21,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:21,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:21,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:45:21,404 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:21,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 262992997, now seen corresponding path program 2 times [2024-06-21 21:45:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:21,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089644148] [2024-06-21 21:45:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:23,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:23,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089644148] [2024-06-21 21:45:23,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089644148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:23,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:23,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:23,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308858731] [2024-06-21 21:45:23,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:23,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:23,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 525 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:23,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:23,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:23,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:26,028 INFO L124 PetriNetUnfolderBase]: 5645/8778 cut-off events. [2024-06-21 21:45:26,028 INFO L125 PetriNetUnfolderBase]: For 1060916/1060959 co-relation queries the response was YES. [2024-06-21 21:45:26,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85741 conditions, 8778 events. 5645/8778 cut-off events. For 1060916/1060959 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 54062 event pairs, 1218 based on Foata normal form. 33/8807 useless extension candidates. Maximal degree in co-relation 85555. Up to 8678 conditions per place. [2024-06-21 21:45:26,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 500 selfloop transitions, 42 changer transitions 0/545 dead transitions. [2024-06-21 21:45:26,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 545 transitions, 10335 flow [2024-06-21 21:45:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-21 21:45:26,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-21 21:45:26,184 INFO L175 Difference]: Start difference. First operand has 373 places, 525 transitions, 9072 flow. Second operand 7 states and 103 transitions. [2024-06-21 21:45:26,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 545 transitions, 10335 flow [2024-06-21 21:45:28,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 545 transitions, 10195 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:28,968 INFO L231 Difference]: Finished difference. Result has 375 places, 531 transitions, 9165 flow [2024-06-21 21:45:28,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9165, PETRI_PLACES=375, PETRI_TRANSITIONS=531} [2024-06-21 21:45:28,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 21:45:28,969 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 531 transitions, 9165 flow [2024-06-21 21:45:28,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:28,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:28,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:45:28,970 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:28,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 262636807, now seen corresponding path program 3 times [2024-06-21 21:45:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134164956] [2024-06-21 21:45:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:31,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:31,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134164956] [2024-06-21 21:45:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134164956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014790611] [2024-06-21 21:45:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:31,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:31,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 531 transitions, 9165 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:31,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:31,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:31,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:34,564 INFO L124 PetriNetUnfolderBase]: 5639/8770 cut-off events. [2024-06-21 21:45:34,564 INFO L125 PetriNetUnfolderBase]: For 1050925/1050968 co-relation queries the response was YES. [2024-06-21 21:45:34,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85987 conditions, 8770 events. 5639/8770 cut-off events. For 1050925/1050968 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 54001 event pairs, 1214 based on Foata normal form. 32/8798 useless extension candidates. Maximal degree in co-relation 85801. Up to 8550 conditions per place. [2024-06-21 21:45:34,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 495 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-21 21:45:34,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 564 transitions, 10414 flow [2024-06-21 21:45:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:45:34,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:45:34,693 INFO L175 Difference]: Start difference. First operand has 375 places, 531 transitions, 9165 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:45:34,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 564 transitions, 10414 flow [2024-06-21 21:45:37,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 564 transitions, 10217 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:37,465 INFO L231 Difference]: Finished difference. Result has 378 places, 531 transitions, 9112 flow [2024-06-21 21:45:37,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9112, PETRI_PLACES=378, PETRI_TRANSITIONS=531} [2024-06-21 21:45:37,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:45:37,465 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 531 transitions, 9112 flow [2024-06-21 21:45:37,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:37,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:37,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:37,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:45:37,466 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2017695495, now seen corresponding path program 4 times [2024-06-21 21:45:37,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:37,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679606911] [2024-06-21 21:45:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679606911] [2024-06-21 21:45:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679606911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:39,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772600710] [2024-06-21 21:45:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:40,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 531 transitions, 9112 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:40,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:40,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:40,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:43,179 INFO L124 PetriNetUnfolderBase]: 5745/8916 cut-off events. [2024-06-21 21:45:43,179 INFO L125 PetriNetUnfolderBase]: For 1127289/1127332 co-relation queries the response was YES. [2024-06-21 21:45:43,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88860 conditions, 8916 events. 5745/8916 cut-off events. For 1127289/1127332 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54828 event pairs, 1200 based on Foata normal form. 32/8944 useless extension candidates. Maximal degree in co-relation 88673. Up to 8050 conditions per place. [2024-06-21 21:45:43,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 142 changer transitions 0/577 dead transitions. [2024-06-21 21:45:43,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 577 transitions, 11279 flow [2024-06-21 21:45:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:45:43,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:45:43,349 INFO L175 Difference]: Start difference. First operand has 378 places, 531 transitions, 9112 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:45:43,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 577 transitions, 11279 flow [2024-06-21 21:45:46,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 577 transitions, 11128 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:45:46,788 INFO L231 Difference]: Finished difference. Result has 379 places, 542 transitions, 9573 flow [2024-06-21 21:45:46,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9573, PETRI_PLACES=379, PETRI_TRANSITIONS=542} [2024-06-21 21:45:46,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 21:45:46,788 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 542 transitions, 9573 flow [2024-06-21 21:45:46,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:46,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:46,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:45:46,789 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2017690845, now seen corresponding path program 5 times [2024-06-21 21:45:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029560824] [2024-06-21 21:45:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:48,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:48,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029560824] [2024-06-21 21:45:48,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029560824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:48,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:48,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:48,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981268668] [2024-06-21 21:45:48,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:48,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:48,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:48,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 542 transitions, 9573 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:48,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:48,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:48,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:52,142 INFO L124 PetriNetUnfolderBase]: 5739/8908 cut-off events. [2024-06-21 21:45:52,143 INFO L125 PetriNetUnfolderBase]: For 1100256/1100299 co-relation queries the response was YES. [2024-06-21 21:45:52,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88876 conditions, 8908 events. 5739/8908 cut-off events. For 1100256/1100299 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54800 event pairs, 1230 based on Foata normal form. 32/8936 useless extension candidates. Maximal degree in co-relation 88690. Up to 8681 conditions per place. [2024-06-21 21:45:52,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 81 changer transitions 0/564 dead transitions. [2024-06-21 21:45:52,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 564 transitions, 10763 flow [2024-06-21 21:45:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:45:52,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:45:52,287 INFO L175 Difference]: Start difference. First operand has 379 places, 542 transitions, 9573 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:45:52,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 564 transitions, 10763 flow [2024-06-21 21:45:55,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 564 transitions, 10381 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:55,082 INFO L231 Difference]: Finished difference. Result has 382 places, 542 transitions, 9359 flow [2024-06-21 21:45:55,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9359, PETRI_PLACES=382, PETRI_TRANSITIONS=542} [2024-06-21 21:45:55,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:45:55,083 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 542 transitions, 9359 flow [2024-06-21 21:45:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:55,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:55,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:55,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:45:55,083 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:55,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 505804433, now seen corresponding path program 6 times [2024-06-21 21:45:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:55,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104051793] [2024-06-21 21:45:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:57,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104051793] [2024-06-21 21:45:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104051793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:57,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:57,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405736583] [2024-06-21 21:45:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:57,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:45:57,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 542 transitions, 9359 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:45:57,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:00,352 INFO L124 PetriNetUnfolderBase]: 5749/8922 cut-off events. [2024-06-21 21:46:00,352 INFO L125 PetriNetUnfolderBase]: For 1116916/1116959 co-relation queries the response was YES. [2024-06-21 21:46:00,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88581 conditions, 8922 events. 5749/8922 cut-off events. For 1116916/1116959 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54933 event pairs, 1200 based on Foata normal form. 32/8950 useless extension candidates. Maximal degree in co-relation 88394. Up to 8053 conditions per place. [2024-06-21 21:46:00,509 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 143 changer transitions 0/577 dead transitions. [2024-06-21 21:46:00,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 577 transitions, 11085 flow [2024-06-21 21:46:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:46:00,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:46:00,510 INFO L175 Difference]: Start difference. First operand has 382 places, 542 transitions, 9359 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:46:00,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 577 transitions, 11085 flow [2024-06-21 21:46:03,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 577 transitions, 10921 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:03,410 INFO L231 Difference]: Finished difference. Result has 384 places, 545 transitions, 9566 flow [2024-06-21 21:46:03,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9195, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9566, PETRI_PLACES=384, PETRI_TRANSITIONS=545} [2024-06-21 21:46:03,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 21:46:03,410 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 545 transitions, 9566 flow [2024-06-21 21:46:03,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:03,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:03,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:03,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:46:03,411 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:03,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1454620787, now seen corresponding path program 7 times [2024-06-21 21:46:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:03,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573202334] [2024-06-21 21:46:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:05,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573202334] [2024-06-21 21:46:05,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573202334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039079267] [2024-06-21 21:46:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:05,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:05,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 545 transitions, 9566 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:05,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:05,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:05,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:08,996 INFO L124 PetriNetUnfolderBase]: 5723/8886 cut-off events. [2024-06-21 21:46:08,996 INFO L125 PetriNetUnfolderBase]: For 1130481/1130524 co-relation queries the response was YES. [2024-06-21 21:46:09,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88479 conditions, 8886 events. 5723/8886 cut-off events. For 1130481/1130524 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54726 event pairs, 1224 based on Foata normal form. 36/8918 useless extension candidates. Maximal degree in co-relation 88291. Up to 8034 conditions per place. [2024-06-21 21:46:09,134 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 137 changer transitions 0/573 dead transitions. [2024-06-21 21:46:09,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 573 transitions, 11020 flow [2024-06-21 21:46:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:46:09,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:46:09,136 INFO L175 Difference]: Start difference. First operand has 384 places, 545 transitions, 9566 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:46:09,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 573 transitions, 11020 flow [2024-06-21 21:46:11,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 573 transitions, 10612 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:11,969 INFO L231 Difference]: Finished difference. Result has 386 places, 545 transitions, 9440 flow [2024-06-21 21:46:11,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9158, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9440, PETRI_PLACES=386, PETRI_TRANSITIONS=545} [2024-06-21 21:46:11,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 21:46:11,970 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 545 transitions, 9440 flow [2024-06-21 21:46:11,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:11,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:11,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:11,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:46:11,970 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:11,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1663427805, now seen corresponding path program 8 times [2024-06-21 21:46:11,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:11,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028076522] [2024-06-21 21:46:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:11,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028076522] [2024-06-21 21:46:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028076522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:14,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:14,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615215812] [2024-06-21 21:46:14,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:14,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:14,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:14,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 545 transitions, 9440 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:14,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:14,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:14,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:17,355 INFO L124 PetriNetUnfolderBase]: 5705/8862 cut-off events. [2024-06-21 21:46:17,355 INFO L125 PetriNetUnfolderBase]: For 1123373/1123416 co-relation queries the response was YES. [2024-06-21 21:46:17,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87580 conditions, 8862 events. 5705/8862 cut-off events. For 1123373/1123416 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54543 event pairs, 1222 based on Foata normal form. 36/8894 useless extension candidates. Maximal degree in co-relation 87391. Up to 8472 conditions per place. [2024-06-21 21:46:17,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 94 changer transitions 0/573 dead transitions. [2024-06-21 21:46:17,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 573 transitions, 10903 flow [2024-06-21 21:46:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 21:46:17,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 21:46:17,515 INFO L175 Difference]: Start difference. First operand has 386 places, 545 transitions, 9440 flow. Second operand 10 states and 153 transitions. [2024-06-21 21:46:17,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 573 transitions, 10903 flow [2024-06-21 21:46:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 573 transitions, 10611 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:20,705 INFO L231 Difference]: Finished difference. Result has 389 places, 545 transitions, 9344 flow [2024-06-21 21:46:20,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9344, PETRI_PLACES=389, PETRI_TRANSITIONS=545} [2024-06-21 21:46:20,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 21:46:20,706 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 545 transitions, 9344 flow [2024-06-21 21:46:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:20,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:20,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:46:20,707 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:20,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1663190655, now seen corresponding path program 9 times [2024-06-21 21:46:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190274762] [2024-06-21 21:46:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190274762] [2024-06-21 21:46:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190274762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:23,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334451589] [2024-06-21 21:46:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:23,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:23,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 545 transitions, 9344 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:23,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:23,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:23,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:26,167 INFO L124 PetriNetUnfolderBase]: 5679/8826 cut-off events. [2024-06-21 21:46:26,167 INFO L125 PetriNetUnfolderBase]: For 1113374/1113417 co-relation queries the response was YES. [2024-06-21 21:46:26,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86589 conditions, 8826 events. 5679/8826 cut-off events. For 1113374/1113417 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54321 event pairs, 1208 based on Foata normal form. 36/8858 useless extension candidates. Maximal degree in co-relation 86399. Up to 8453 conditions per place. [2024-06-21 21:46:26,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 89 changer transitions 0/568 dead transitions. [2024-06-21 21:46:26,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 568 transitions, 10579 flow [2024-06-21 21:46:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:46:26,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 21:46:26,303 INFO L175 Difference]: Start difference. First operand has 389 places, 545 transitions, 9344 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:46:26,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 568 transitions, 10579 flow [2024-06-21 21:46:29,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 568 transitions, 10245 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-21 21:46:29,524 INFO L231 Difference]: Finished difference. Result has 388 places, 545 transitions, 9197 flow [2024-06-21 21:46:29,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9010, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9197, PETRI_PLACES=388, PETRI_TRANSITIONS=545} [2024-06-21 21:46:29,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:46:29,525 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 545 transitions, 9197 flow [2024-06-21 21:46:29,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:29,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:29,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:29,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:46:29,526 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:29,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash -208740787, now seen corresponding path program 10 times [2024-06-21 21:46:29,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:29,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832355846] [2024-06-21 21:46:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:29,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832355846] [2024-06-21 21:46:31,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832355846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:31,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:31,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60710111] [2024-06-21 21:46:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:31,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:31,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:31,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 545 transitions, 9197 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:31,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:31,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:31,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:35,141 INFO L124 PetriNetUnfolderBase]: 5661/8802 cut-off events. [2024-06-21 21:46:35,141 INFO L125 PetriNetUnfolderBase]: For 1102556/1102599 co-relation queries the response was YES. [2024-06-21 21:46:35,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85611 conditions, 8802 events. 5661/8802 cut-off events. For 1102556/1102599 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54221 event pairs, 1197 based on Foata normal form. 36/8834 useless extension candidates. Maximal degree in co-relation 85421. Up to 8097 conditions per place. [2024-06-21 21:46:35,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 439 selfloop transitions, 132 changer transitions 0/574 dead transitions. [2024-06-21 21:46:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 574 transitions, 10647 flow [2024-06-21 21:46:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:46:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:46:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:46:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:46:35,293 INFO L175 Difference]: Start difference. First operand has 388 places, 545 transitions, 9197 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:46:35,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 574 transitions, 10647 flow [2024-06-21 21:46:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 574 transitions, 10413 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:38,843 INFO L231 Difference]: Finished difference. Result has 388 places, 545 transitions, 9251 flow [2024-06-21 21:46:38,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9251, PETRI_PLACES=388, PETRI_TRANSITIONS=545} [2024-06-21 21:46:38,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:46:38,844 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 545 transitions, 9251 flow [2024-06-21 21:46:38,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:38,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:38,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:46:38,844 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:38,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash -208977937, now seen corresponding path program 11 times [2024-06-21 21:46:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:38,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065351606] [2024-06-21 21:46:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065351606] [2024-06-21 21:46:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065351606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:41,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:41,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:41,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913212860] [2024-06-21 21:46:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:41,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:41,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:41,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:41,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 545 transitions, 9251 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:41,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:41,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:41,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:44,599 INFO L124 PetriNetUnfolderBase]: 5643/8778 cut-off events. [2024-06-21 21:46:44,599 INFO L125 PetriNetUnfolderBase]: For 1093534/1093577 co-relation queries the response was YES. [2024-06-21 21:46:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85177 conditions, 8778 events. 5643/8778 cut-off events. For 1093534/1093577 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54136 event pairs, 1194 based on Foata normal form. 36/8810 useless extension candidates. Maximal degree in co-relation 84986. Up to 8086 conditions per place. [2024-06-21 21:46:44,739 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 147 changer transitions 0/586 dead transitions. [2024-06-21 21:46:44,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 586 transitions, 10777 flow [2024-06-21 21:46:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:46:44,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:46:44,741 INFO L175 Difference]: Start difference. First operand has 388 places, 545 transitions, 9251 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:46:44,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 586 transitions, 10777 flow [2024-06-21 21:46:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 586 transitions, 10359 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 21:46:48,226 INFO L231 Difference]: Finished difference. Result has 388 places, 545 transitions, 9155 flow [2024-06-21 21:46:48,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8837, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9155, PETRI_PLACES=388, PETRI_TRANSITIONS=545} [2024-06-21 21:46:48,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:46:48,227 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 545 transitions, 9155 flow [2024-06-21 21:46:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:48,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:48,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:46:48,228 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -386109457, now seen corresponding path program 12 times [2024-06-21 21:46:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067168392] [2024-06-21 21:46:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067168392] [2024-06-21 21:46:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067168392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:50,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118581506] [2024-06-21 21:46:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:50,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:50,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 545 transitions, 9155 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:50,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:50,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:50,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:53,558 INFO L124 PetriNetUnfolderBase]: 5617/8741 cut-off events. [2024-06-21 21:46:53,559 INFO L125 PetriNetUnfolderBase]: For 1042953/1042971 co-relation queries the response was YES. [2024-06-21 21:46:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83859 conditions, 8741 events. 5617/8741 cut-off events. For 1042953/1042971 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 53944 event pairs, 1191 based on Foata normal form. 24/8763 useless extension candidates. Maximal degree in co-relation 83669. Up to 8067 conditions per place. [2024-06-21 21:46:53,717 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 156 changer transitions 0/588 dead transitions. [2024-06-21 21:46:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 588 transitions, 10495 flow [2024-06-21 21:46:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:46:53,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:46:53,719 INFO L175 Difference]: Start difference. First operand has 388 places, 545 transitions, 9155 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:46:53,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 588 transitions, 10495 flow [2024-06-21 21:46:56,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 588 transitions, 10123 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-21 21:46:56,937 INFO L231 Difference]: Finished difference. Result has 386 places, 545 transitions, 9117 flow [2024-06-21 21:46:56,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9117, PETRI_PLACES=386, PETRI_TRANSITIONS=545} [2024-06-21 21:46:56,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 21:46:56,938 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 545 transitions, 9117 flow [2024-06-21 21:46:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:56,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:56,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:56,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:46:56,938 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:56,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash 13633683, now seen corresponding path program 2 times [2024-06-21 21:46:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:56,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575277526] [2024-06-21 21:46:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:59,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:59,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575277526] [2024-06-21 21:46:59,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575277526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:59,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:59,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526967761] [2024-06-21 21:46:59,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:59,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:59,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:59,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:59,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:59,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:46:59,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 545 transitions, 9117 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:59,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:59,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:46:59,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:01,901 INFO L124 PetriNetUnfolderBase]: 5602/8715 cut-off events. [2024-06-21 21:47:01,901 INFO L125 PetriNetUnfolderBase]: For 975963/975979 co-relation queries the response was YES. [2024-06-21 21:47:01,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83067 conditions, 8715 events. 5602/8715 cut-off events. For 975963/975979 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 53697 event pairs, 1190 based on Foata normal form. 17/8730 useless extension candidates. Maximal degree in co-relation 82879. Up to 8580 conditions per place. [2024-06-21 21:47:02,025 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 51 changer transitions 0/572 dead transitions. [2024-06-21 21:47:02,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 572 transitions, 10338 flow [2024-06-21 21:47:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:47:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:47:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:47:02,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:47:02,026 INFO L175 Difference]: Start difference. First operand has 386 places, 545 transitions, 9117 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:47:02,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 572 transitions, 10338 flow [2024-06-21 21:47:04,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 572 transitions, 10004 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:47:04,684 INFO L231 Difference]: Finished difference. Result has 382 places, 545 transitions, 8915 flow [2024-06-21 21:47:04,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8915, PETRI_PLACES=382, PETRI_TRANSITIONS=545} [2024-06-21 21:47:04,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:47:04,685 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 545 transitions, 8915 flow [2024-06-21 21:47:04,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:04,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:04,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:04,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:47:04,686 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:04,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 13634117, now seen corresponding path program 1 times [2024-06-21 21:47:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:04,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62085275] [2024-06-21 21:47:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:07,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62085275] [2024-06-21 21:47:07,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62085275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:07,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:07,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:07,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817664579] [2024-06-21 21:47:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:07,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:07,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:07,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:07,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 545 transitions, 8915 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:07,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:07,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:07,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:10,266 INFO L124 PetriNetUnfolderBase]: 5610/8729 cut-off events. [2024-06-21 21:47:10,266 INFO L125 PetriNetUnfolderBase]: For 945662/945705 co-relation queries the response was YES. [2024-06-21 21:47:10,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82328 conditions, 8729 events. 5610/8729 cut-off events. For 945662/945705 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 53715 event pairs, 1193 based on Foata normal form. 32/8757 useless extension candidates. Maximal degree in co-relation 82141. Up to 8643 conditions per place. [2024-06-21 21:47:10,412 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 526 selfloop transitions, 33 changer transitions 0/562 dead transitions. [2024-06-21 21:47:10,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 562 transitions, 10180 flow [2024-06-21 21:47:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-21 21:47:10,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3244047619047619 [2024-06-21 21:47:10,414 INFO L175 Difference]: Start difference. First operand has 382 places, 545 transitions, 8915 flow. Second operand 8 states and 109 transitions. [2024-06-21 21:47:10,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 562 transitions, 10180 flow [2024-06-21 21:47:12,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 562 transitions, 10074 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:12,807 INFO L231 Difference]: Finished difference. Result has 386 places, 549 transitions, 8985 flow [2024-06-21 21:47:12,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8813, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8985, PETRI_PLACES=386, PETRI_TRANSITIONS=549} [2024-06-21 21:47:12,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 21:47:12,807 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 549 transitions, 8985 flow [2024-06-21 21:47:12,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:12,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:12,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:12,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:47:12,808 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:12,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 993829727, now seen corresponding path program 2 times [2024-06-21 21:47:12,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451760921] [2024-06-21 21:47:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451760921] [2024-06-21 21:47:15,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451760921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:15,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682534465] [2024-06-21 21:47:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:15,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:15,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 549 transitions, 8985 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:15,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:15,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:15,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:17,905 INFO L124 PetriNetUnfolderBase]: 5605/8722 cut-off events. [2024-06-21 21:47:17,905 INFO L125 PetriNetUnfolderBase]: For 955857/955891 co-relation queries the response was YES. [2024-06-21 21:47:17,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82314 conditions, 8722 events. 5605/8722 cut-off events. For 955857/955891 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 53691 event pairs, 1185 based on Foata normal form. 26/8744 useless extension candidates. Maximal degree in co-relation 82125. Up to 8616 conditions per place. [2024-06-21 21:47:18,023 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 34 changer transitions 0/565 dead transitions. [2024-06-21 21:47:18,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 565 transitions, 10216 flow [2024-06-21 21:47:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 21:47:18,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-06-21 21:47:18,025 INFO L175 Difference]: Start difference. First operand has 386 places, 549 transitions, 8985 flow. Second operand 8 states and 108 transitions. [2024-06-21 21:47:18,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 565 transitions, 10216 flow [2024-06-21 21:47:21,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 565 transitions, 10099 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:21,097 INFO L231 Difference]: Finished difference. Result has 389 places, 551 transitions, 9000 flow [2024-06-21 21:47:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8870, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9000, PETRI_PLACES=389, PETRI_TRANSITIONS=551} [2024-06-21 21:47:21,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 21:47:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 551 transitions, 9000 flow [2024-06-21 21:47:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:21,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:47:21,098 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1457468819, now seen corresponding path program 1 times [2024-06-21 21:47:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557364499] [2024-06-21 21:47:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:24,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557364499] [2024-06-21 21:47:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557364499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:24,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:24,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688203466] [2024-06-21 21:47:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:24,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:24,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:24,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:24,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 551 transitions, 9000 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:24,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:24,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:24,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:26,929 INFO L124 PetriNetUnfolderBase]: 5613/8735 cut-off events. [2024-06-21 21:47:26,930 INFO L125 PetriNetUnfolderBase]: For 973299/973299 co-relation queries the response was YES. [2024-06-21 21:47:27,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82619 conditions, 8735 events. 5613/8735 cut-off events. For 973299/973299 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 53657 event pairs, 1144 based on Foata normal form. 2/8735 useless extension candidates. Maximal degree in co-relation 82430. Up to 8611 conditions per place. [2024-06-21 21:47:27,086 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 547 selfloop transitions, 33 changer transitions 0/583 dead transitions. [2024-06-21 21:47:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 583 transitions, 10560 flow [2024-06-21 21:47:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:47:27,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:47:27,088 INFO L175 Difference]: Start difference. First operand has 389 places, 551 transitions, 9000 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:47:27,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 583 transitions, 10560 flow [2024-06-21 21:47:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 583 transitions, 10434 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:30,550 INFO L231 Difference]: Finished difference. Result has 391 places, 555 transitions, 9077 flow [2024-06-21 21:47:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8874, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9077, PETRI_PLACES=391, PETRI_TRANSITIONS=555} [2024-06-21 21:47:30,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-21 21:47:30,551 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 555 transitions, 9077 flow [2024-06-21 21:47:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:30,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:30,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:47:30,551 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:30,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash 506083991, now seen corresponding path program 2 times [2024-06-21 21:47:30,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:30,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061763503] [2024-06-21 21:47:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061763503] [2024-06-21 21:47:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061763503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:33,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:33,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993836953] [2024-06-21 21:47:33,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:33,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:33,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 555 transitions, 9077 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:33,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:33,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:36,814 INFO L124 PetriNetUnfolderBase]: 5621/8747 cut-off events. [2024-06-21 21:47:36,814 INFO L125 PetriNetUnfolderBase]: For 992355/992355 co-relation queries the response was YES. [2024-06-21 21:47:36,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82903 conditions, 8747 events. 5621/8747 cut-off events. For 992355/992355 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53883 event pairs, 1188 based on Foata normal form. 2/8747 useless extension candidates. Maximal degree in co-relation 82714. Up to 8660 conditions per place. [2024-06-21 21:47:36,964 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 546 selfloop transitions, 31 changer transitions 0/580 dead transitions. [2024-06-21 21:47:36,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 580 transitions, 10375 flow [2024-06-21 21:47:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 21:47:36,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-21 21:47:36,966 INFO L175 Difference]: Start difference. First operand has 391 places, 555 transitions, 9077 flow. Second operand 8 states and 118 transitions. [2024-06-21 21:47:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 580 transitions, 10375 flow [2024-06-21 21:47:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 580 transitions, 10234 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 21:47:40,066 INFO L231 Difference]: Finished difference. Result has 395 places, 557 transitions, 9075 flow [2024-06-21 21:47:40,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9075, PETRI_PLACES=395, PETRI_TRANSITIONS=557} [2024-06-21 21:47:40,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 21:47:40,067 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 557 transitions, 9075 flow [2024-06-21 21:47:40,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:40,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:40,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:47:40,067 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:40,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1339320689, now seen corresponding path program 3 times [2024-06-21 21:47:40,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:40,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185053279] [2024-06-21 21:47:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:40,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:42,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:42,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185053279] [2024-06-21 21:47:42,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185053279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:42,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:42,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656854089] [2024-06-21 21:47:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:42,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:42,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:42,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:42,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 557 transitions, 9075 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:42,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:42,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:42,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:45,448 INFO L124 PetriNetUnfolderBase]: 5629/8759 cut-off events. [2024-06-21 21:47:45,448 INFO L125 PetriNetUnfolderBase]: For 1010421/1010421 co-relation queries the response was YES. [2024-06-21 21:47:45,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83073 conditions, 8759 events. 5629/8759 cut-off events. For 1010421/1010421 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54005 event pairs, 1192 based on Foata normal form. 2/8759 useless extension candidates. Maximal degree in co-relation 82882. Up to 8708 conditions per place. [2024-06-21 21:47:45,596 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 553 selfloop transitions, 21 changer transitions 0/577 dead transitions. [2024-06-21 21:47:45,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 577 transitions, 10325 flow [2024-06-21 21:47:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 21:47:45,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 21:47:45,598 INFO L175 Difference]: Start difference. First operand has 395 places, 557 transitions, 9075 flow. Second operand 8 states and 112 transitions. [2024-06-21 21:47:45,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 577 transitions, 10325 flow [2024-06-21 21:47:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 577 transitions, 10230 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:48,991 INFO L231 Difference]: Finished difference. Result has 397 places, 559 transitions, 9079 flow [2024-06-21 21:47:48,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8980, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9079, PETRI_PLACES=397, PETRI_TRANSITIONS=559} [2024-06-21 21:47:48,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 21:47:48,992 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 559 transitions, 9079 flow [2024-06-21 21:47:48,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:48,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:48,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:48,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:47:48,992 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:48,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1126024545, now seen corresponding path program 1 times [2024-06-21 21:47:48,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674483028] [2024-06-21 21:47:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:48,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:52,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674483028] [2024-06-21 21:47:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674483028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:52,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:47:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821839301] [2024-06-21 21:47:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:47:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:47:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:47:52,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:47:52,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 559 transitions, 9079 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:52,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:52,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:47:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:55,509 INFO L124 PetriNetUnfolderBase]: 5645/8782 cut-off events. [2024-06-21 21:47:55,509 INFO L125 PetriNetUnfolderBase]: For 1038804/1038838 co-relation queries the response was YES. [2024-06-21 21:47:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83387 conditions, 8782 events. 5645/8782 cut-off events. For 1038804/1038838 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 54149 event pairs, 1204 based on Foata normal form. 28/8806 useless extension candidates. Maximal degree in co-relation 83195. Up to 8549 conditions per place. [2024-06-21 21:47:55,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 500 selfloop transitions, 78 changer transitions 0/581 dead transitions. [2024-06-21 21:47:55,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 581 transitions, 10369 flow [2024-06-21 21:47:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:47:55,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:47:55,902 INFO L175 Difference]: Start difference. First operand has 397 places, 559 transitions, 9079 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:47:55,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 581 transitions, 10369 flow [2024-06-21 21:47:58,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 581 transitions, 10290 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:58,868 INFO L231 Difference]: Finished difference. Result has 399 places, 562 transitions, 9243 flow [2024-06-21 21:47:58,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9000, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9243, PETRI_PLACES=399, PETRI_TRANSITIONS=562} [2024-06-21 21:47:58,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 21:47:58,869 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 562 transitions, 9243 flow [2024-06-21 21:47:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:58,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:58,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:47:58,869 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:58,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -208731859, now seen corresponding path program 4 times [2024-06-21 21:47:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:58,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823545884] [2024-06-21 21:47:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:01,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823545884] [2024-06-21 21:48:01,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823545884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:01,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:01,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766585491] [2024-06-21 21:48:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:01,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:01,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 562 transitions, 9243 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:01,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:01,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:01,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:04,875 INFO L124 PetriNetUnfolderBase]: 5640/8776 cut-off events. [2024-06-21 21:48:04,875 INFO L125 PetriNetUnfolderBase]: For 1036539/1036539 co-relation queries the response was YES. [2024-06-21 21:48:04,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83600 conditions, 8776 events. 5640/8776 cut-off events. For 1036539/1036539 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 53983 event pairs, 1141 based on Foata normal form. 2/8776 useless extension candidates. Maximal degree in co-relation 83407. Up to 8669 conditions per place. [2024-06-21 21:48:05,033 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 552 selfloop transitions, 32 changer transitions 0/587 dead transitions. [2024-06-21 21:48:05,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 587 transitions, 10487 flow [2024-06-21 21:48:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:48:05,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:48:05,035 INFO L175 Difference]: Start difference. First operand has 399 places, 562 transitions, 9243 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:48:05,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 587 transitions, 10487 flow [2024-06-21 21:48:08,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 587 transitions, 10237 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:08,378 INFO L231 Difference]: Finished difference. Result has 400 places, 562 transitions, 9068 flow [2024-06-21 21:48:08,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8993, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9068, PETRI_PLACES=400, PETRI_TRANSITIONS=562} [2024-06-21 21:48:08,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 21:48:08,379 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 562 transitions, 9068 flow [2024-06-21 21:48:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:08,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:08,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:48:08,379 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:08,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash -208547161, now seen corresponding path program 2 times [2024-06-21 21:48:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:08,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012914927] [2024-06-21 21:48:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012914927] [2024-06-21 21:48:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012914927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:11,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:11,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738959853] [2024-06-21 21:48:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:11,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:11,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:11,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 562 transitions, 9068 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:11,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:11,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:11,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:13,991 INFO L124 PetriNetUnfolderBase]: 5656/8799 cut-off events. [2024-06-21 21:48:13,991 INFO L125 PetriNetUnfolderBase]: For 1065856/1065890 co-relation queries the response was YES. [2024-06-21 21:48:14,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83700 conditions, 8799 events. 5656/8799 cut-off events. For 1065856/1065890 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54267 event pairs, 1203 based on Foata normal form. 28/8823 useless extension candidates. Maximal degree in co-relation 83506. Up to 8554 conditions per place. [2024-06-21 21:48:14,133 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 495 selfloop transitions, 84 changer transitions 0/582 dead transitions. [2024-06-21 21:48:14,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 582 transitions, 10357 flow [2024-06-21 21:48:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:48:14,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 21:48:14,134 INFO L175 Difference]: Start difference. First operand has 400 places, 562 transitions, 9068 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:48:14,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 582 transitions, 10357 flow [2024-06-21 21:48:17,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 582 transitions, 10284 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:17,945 INFO L231 Difference]: Finished difference. Result has 401 places, 565 transitions, 9260 flow [2024-06-21 21:48:17,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8995, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9260, PETRI_PLACES=401, PETRI_TRANSITIONS=565} [2024-06-21 21:48:17,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 21:48:17,946 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 565 transitions, 9260 flow [2024-06-21 21:48:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:17,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:17,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:48:17,947 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 19353989, now seen corresponding path program 3 times [2024-06-21 21:48:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:17,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770387200] [2024-06-21 21:48:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:17,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:20,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:20,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770387200] [2024-06-21 21:48:20,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770387200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:20,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:20,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166296531] [2024-06-21 21:48:20,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:20,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:20,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 565 transitions, 9260 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:20,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:20,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:20,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:23,217 INFO L124 PetriNetUnfolderBase]: 5672/8826 cut-off events. [2024-06-21 21:48:23,217 INFO L125 PetriNetUnfolderBase]: For 1068697/1068745 co-relation queries the response was YES. [2024-06-21 21:48:23,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84287 conditions, 8826 events. 5672/8826 cut-off events. For 1068697/1068745 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 54491 event pairs, 1234 based on Foata normal form. 36/8858 useless extension candidates. Maximal degree in co-relation 84092. Up to 8590 conditions per place. [2024-06-21 21:48:23,373 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 497 selfloop transitions, 81 changer transitions 0/581 dead transitions. [2024-06-21 21:48:23,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 581 transitions, 10541 flow [2024-06-21 21:48:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 21:48:23,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 21:48:23,375 INFO L175 Difference]: Start difference. First operand has 401 places, 565 transitions, 9260 flow. Second operand 7 states and 106 transitions. [2024-06-21 21:48:23,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 581 transitions, 10541 flow [2024-06-21 21:48:26,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 581 transitions, 10303 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:26,846 INFO L231 Difference]: Finished difference. Result has 403 places, 568 transitions, 9283 flow [2024-06-21 21:48:26,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9283, PETRI_PLACES=403, PETRI_TRANSITIONS=568} [2024-06-21 21:48:26,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 21:48:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 568 transitions, 9283 flow [2024-06-21 21:48:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:26,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:26,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:48:26,847 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 27924869, now seen corresponding path program 4 times [2024-06-21 21:48:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420720566] [2024-06-21 21:48:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:29,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420720566] [2024-06-21 21:48:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420720566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:29,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171694546] [2024-06-21 21:48:29,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:29,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:29,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 568 transitions, 9283 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:29,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:29,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:29,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:32,759 INFO L124 PetriNetUnfolderBase]: 5675/8831 cut-off events. [2024-06-21 21:48:32,772 INFO L125 PetriNetUnfolderBase]: For 1058530/1058578 co-relation queries the response was YES. [2024-06-21 21:48:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83966 conditions, 8831 events. 5675/8831 cut-off events. For 1058530/1058578 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 54524 event pairs, 1213 based on Foata normal form. 36/8863 useless extension candidates. Maximal degree in co-relation 83770. Up to 8543 conditions per place. [2024-06-21 21:48:32,936 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 490 selfloop transitions, 91 changer transitions 0/584 dead transitions. [2024-06-21 21:48:32,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 584 transitions, 10564 flow [2024-06-21 21:48:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 21:48:32,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 21:48:32,937 INFO L175 Difference]: Start difference. First operand has 403 places, 568 transitions, 9283 flow. Second operand 7 states and 106 transitions. [2024-06-21 21:48:32,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 584 transitions, 10564 flow [2024-06-21 21:48:36,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 584 transitions, 10336 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:36,901 INFO L231 Difference]: Finished difference. Result has 405 places, 571 transitions, 9336 flow [2024-06-21 21:48:36,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9055, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9336, PETRI_PLACES=405, PETRI_TRANSITIONS=571} [2024-06-21 21:48:36,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 21:48:36,902 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 571 transitions, 9336 flow [2024-06-21 21:48:36,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:36,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:36,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:36,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:48:36,903 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:36,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1666188786, now seen corresponding path program 1 times [2024-06-21 21:48:36,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:36,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25648805] [2024-06-21 21:48:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25648805] [2024-06-21 21:48:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25648805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:39,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544099552] [2024-06-21 21:48:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:39,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:39,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 571 transitions, 9336 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:39,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:39,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:39,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:42,159 INFO L124 PetriNetUnfolderBase]: 5770/8973 cut-off events. [2024-06-21 21:48:42,159 INFO L125 PetriNetUnfolderBase]: For 1147325/1147359 co-relation queries the response was YES. [2024-06-21 21:48:42,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86521 conditions, 8973 events. 5770/8973 cut-off events. For 1147325/1147359 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55235 event pairs, 1067 based on Foata normal form. 32/9001 useless extension candidates. Maximal degree in co-relation 86324. Up to 8477 conditions per place. [2024-06-21 21:48:42,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 551 selfloop transitions, 69 changer transitions 0/623 dead transitions. [2024-06-21 21:48:42,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 623 transitions, 11162 flow [2024-06-21 21:48:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:48:42,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:48:42,299 INFO L175 Difference]: Start difference. First operand has 405 places, 571 transitions, 9336 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:48:42,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 623 transitions, 11162 flow [2024-06-21 21:48:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 623 transitions, 10908 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:45,416 INFO L231 Difference]: Finished difference. Result has 410 places, 575 transitions, 9316 flow [2024-06-21 21:48:45,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9082, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9316, PETRI_PLACES=410, PETRI_TRANSITIONS=575} [2024-06-21 21:48:45,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 21:48:45,417 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 575 transitions, 9316 flow [2024-06-21 21:48:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:45,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:45,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:45,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:48:45,417 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:45,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1673598096, now seen corresponding path program 2 times [2024-06-21 21:48:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843949778] [2024-06-21 21:48:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:48,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843949778] [2024-06-21 21:48:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843949778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:48,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189198913] [2024-06-21 21:48:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:48,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:48,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 575 transitions, 9316 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:48,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:48,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:51,043 INFO L124 PetriNetUnfolderBase]: 5878/9137 cut-off events. [2024-06-21 21:48:51,043 INFO L125 PetriNetUnfolderBase]: For 1226221/1226255 co-relation queries the response was YES. [2024-06-21 21:48:51,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89377 conditions, 9137 events. 5878/9137 cut-off events. For 1226221/1226255 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56599 event pairs, 1228 based on Foata normal form. 32/9165 useless extension candidates. Maximal degree in co-relation 89178. Up to 8799 conditions per place. [2024-06-21 21:48:51,207 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 67 changer transitions 0/625 dead transitions. [2024-06-21 21:48:51,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 625 transitions, 11168 flow [2024-06-21 21:48:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:48:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:48:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:48:51,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 21:48:51,209 INFO L175 Difference]: Start difference. First operand has 410 places, 575 transitions, 9316 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:48:51,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 625 transitions, 11168 flow [2024-06-21 21:48:56,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 625 transitions, 10981 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:56,053 INFO L231 Difference]: Finished difference. Result has 415 places, 579 transitions, 9373 flow [2024-06-21 21:48:56,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9129, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9373, PETRI_PLACES=415, PETRI_TRANSITIONS=579} [2024-06-21 21:48:56,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 21:48:56,054 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 579 transitions, 9373 flow [2024-06-21 21:48:56,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:56,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:56,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:56,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:48:56,055 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:56,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1673607396, now seen corresponding path program 3 times [2024-06-21 21:48:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:56,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537425036] [2024-06-21 21:48:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:58,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:58,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537425036] [2024-06-21 21:48:58,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537425036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:58,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:58,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:58,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783550173] [2024-06-21 21:48:58,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:58,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:58,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:58,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:48:58,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 579 transitions, 9373 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:58,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:58,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:48:58,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:01,501 INFO L124 PetriNetUnfolderBase]: 5850/9097 cut-off events. [2024-06-21 21:49:01,502 INFO L125 PetriNetUnfolderBase]: For 1209492/1209526 co-relation queries the response was YES. [2024-06-21 21:49:01,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87748 conditions, 9097 events. 5850/9097 cut-off events. For 1209492/1209526 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56337 event pairs, 1226 based on Foata normal form. 36/9129 useless extension candidates. Maximal degree in co-relation 87548. Up to 8825 conditions per place. [2024-06-21 21:49:01,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 551 selfloop transitions, 67 changer transitions 0/621 dead transitions. [2024-06-21 21:49:01,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 621 transitions, 10870 flow [2024-06-21 21:49:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:49:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:49:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-21 21:49:01,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-21 21:49:01,658 INFO L175 Difference]: Start difference. First operand has 415 places, 579 transitions, 9373 flow. Second operand 11 states and 166 transitions. [2024-06-21 21:49:01,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 621 transitions, 10870 flow [2024-06-21 21:49:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 621 transitions, 10762 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:05,843 INFO L231 Difference]: Finished difference. Result has 420 places, 579 transitions, 9405 flow [2024-06-21 21:49:05,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9265, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9405, PETRI_PLACES=420, PETRI_TRANSITIONS=579} [2024-06-21 21:49:05,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 21:49:05,844 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 579 transitions, 9405 flow [2024-06-21 21:49:05,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:05,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:05,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:05,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:49:05,844 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:05,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1754726646, now seen corresponding path program 1 times [2024-06-21 21:49:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:05,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453344427] [2024-06-21 21:49:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:05,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:08,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:08,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453344427] [2024-06-21 21:49:08,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453344427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:08,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520286695] [2024-06-21 21:49:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:08,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:49:08,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 579 transitions, 9405 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:08,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:08,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:49:08,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:11,991 INFO L124 PetriNetUnfolderBase]: 5900/9164 cut-off events. [2024-06-21 21:49:11,992 INFO L125 PetriNetUnfolderBase]: For 1206800/1206814 co-relation queries the response was YES. [2024-06-21 21:49:12,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89496 conditions, 9164 events. 5900/9164 cut-off events. For 1206800/1206814 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56721 event pairs, 1165 based on Foata normal form. 16/9178 useless extension candidates. Maximal degree in co-relation 89294. Up to 8928 conditions per place. [2024-06-21 21:49:12,141 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 560 selfloop transitions, 65 changer transitions 0/628 dead transitions. [2024-06-21 21:49:12,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 628 transitions, 11298 flow [2024-06-21 21:49:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:49:12,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:49:12,142 INFO L175 Difference]: Start difference. First operand has 420 places, 579 transitions, 9405 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:49:12,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 628 transitions, 11298 flow [2024-06-21 21:49:15,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 628 transitions, 11164 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:49:15,547 INFO L231 Difference]: Finished difference. Result has 421 places, 586 transitions, 9704 flow [2024-06-21 21:49:15,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9271, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9704, PETRI_PLACES=421, PETRI_TRANSITIONS=586} [2024-06-21 21:49:15,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 21:49:15,548 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 586 transitions, 9704 flow [2024-06-21 21:49:15,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:15,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:15,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:49:15,549 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:15,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1332260662, now seen corresponding path program 2 times [2024-06-21 21:49:15,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:15,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314767338] [2024-06-21 21:49:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:18,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314767338] [2024-06-21 21:49:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314767338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:18,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:18,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638367449] [2024-06-21 21:49:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:18,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:49:18,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 586 transitions, 9704 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:18,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:18,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:49:18,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:22,176 INFO L124 PetriNetUnfolderBase]: 5920/9192 cut-off events. [2024-06-21 21:49:22,176 INFO L125 PetriNetUnfolderBase]: For 1238273/1238287 co-relation queries the response was YES. [2024-06-21 21:49:22,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90663 conditions, 9192 events. 5920/9192 cut-off events. For 1238273/1238287 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56863 event pairs, 1231 based on Foata normal form. 16/9206 useless extension candidates. Maximal degree in co-relation 90459. Up to 9017 conditions per place. [2024-06-21 21:49:22,329 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 562 selfloop transitions, 65 changer transitions 0/630 dead transitions. [2024-06-21 21:49:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 630 transitions, 11292 flow [2024-06-21 21:49:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:49:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:49:22,331 INFO L175 Difference]: Start difference. First operand has 421 places, 586 transitions, 9704 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:49:22,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 630 transitions, 11292 flow [2024-06-21 21:49:25,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 630 transitions, 11011 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-21 21:49:25,954 INFO L231 Difference]: Finished difference. Result has 425 places, 595 transitions, 9779 flow [2024-06-21 21:49:25,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9469, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9779, PETRI_PLACES=425, PETRI_TRANSITIONS=595} [2024-06-21 21:49:25,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-21 21:49:25,955 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 595 transitions, 9779 flow [2024-06-21 21:49:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:25,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:25,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:49:25,956 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:25,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1332260848, now seen corresponding path program 1 times [2024-06-21 21:49:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320309343] [2024-06-21 21:49:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320309343] [2024-06-21 21:49:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320309343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:28,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:49:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472993982] [2024-06-21 21:49:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:49:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:49:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:49:28,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:49:28,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 595 transitions, 9779 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:49:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:31,238 INFO L124 PetriNetUnfolderBase]: 5977/9273 cut-off events. [2024-06-21 21:49:31,238 INFO L125 PetriNetUnfolderBase]: For 1291267/1291301 co-relation queries the response was YES. [2024-06-21 21:49:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91921 conditions, 9273 events. 5977/9273 cut-off events. For 1291267/1291301 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 57413 event pairs, 1242 based on Foata normal form. 28/9297 useless extension candidates. Maximal degree in co-relation 91715. Up to 8989 conditions per place. [2024-06-21 21:49:31,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 562 selfloop transitions, 70 changer transitions 0/635 dead transitions. [2024-06-21 21:49:31,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 635 transitions, 11651 flow [2024-06-21 21:49:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:49:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:49:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:49:31,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:49:31,433 INFO L175 Difference]: Start difference. First operand has 425 places, 595 transitions, 9779 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:49:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 635 transitions, 11651 flow [2024-06-21 21:49:35,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 635 transitions, 11456 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:36,003 INFO L231 Difference]: Finished difference. Result has 428 places, 604 transitions, 9934 flow [2024-06-21 21:49:36,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9934, PETRI_PLACES=428, PETRI_TRANSITIONS=604} [2024-06-21 21:49:36,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 21:49:36,004 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 604 transitions, 9934 flow [2024-06-21 21:49:36,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:36,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:36,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:36,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:49:36,004 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:36,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash -550591484, now seen corresponding path program 2 times [2024-06-21 21:49:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:36,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850173470] [2024-06-21 21:49:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850173470] [2024-06-21 21:49:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850173470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:38,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:49:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954445115] [2024-06-21 21:49:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:49:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:49:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:49:38,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:49:38,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 604 transitions, 9934 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:38,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:38,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:49:38,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:41,436 INFO L124 PetriNetUnfolderBase]: 5987/9287 cut-off events. [2024-06-21 21:49:41,436 INFO L125 PetriNetUnfolderBase]: For 1303689/1303723 co-relation queries the response was YES. [2024-06-21 21:49:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92873 conditions, 9287 events. 5987/9287 cut-off events. For 1303689/1303723 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 57502 event pairs, 1241 based on Foata normal form. 26/9309 useless extension candidates. Maximal degree in co-relation 92665. Up to 9134 conditions per place. [2024-06-21 21:49:41,643 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 51 changer transitions 0/631 dead transitions. [2024-06-21 21:49:41,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 631 transitions, 11403 flow [2024-06-21 21:49:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:49:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:49:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:49:41,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 21:49:41,645 INFO L175 Difference]: Start difference. First operand has 428 places, 604 transitions, 9934 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:49:41,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 631 transitions, 11403 flow [2024-06-21 21:49:46,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 631 transitions, 11256 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 21:49:46,531 INFO L231 Difference]: Finished difference. Result has 433 places, 607 transitions, 10013 flow [2024-06-21 21:49:46,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9803, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10013, PETRI_PLACES=433, PETRI_TRANSITIONS=607} [2024-06-21 21:49:46,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-21 21:49:46,532 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 607 transitions, 10013 flow [2024-06-21 21:49:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:46,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:46,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:46,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:49:46,532 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:46,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash -550828820, now seen corresponding path program 3 times [2024-06-21 21:49:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:46,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069597583] [2024-06-21 21:49:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:49,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069597583] [2024-06-21 21:49:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069597583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:49,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:49,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480404343] [2024-06-21 21:49:49,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:49,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:49,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:49:49,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 607 transitions, 10013 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:49,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:49,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:49:49,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:52,543 INFO L124 PetriNetUnfolderBase]: 6007/9313 cut-off events. [2024-06-21 21:49:52,543 INFO L125 PetriNetUnfolderBase]: For 1328911/1328925 co-relation queries the response was YES. [2024-06-21 21:49:52,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93423 conditions, 9313 events. 6007/9313 cut-off events. For 1328911/1328925 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 57629 event pairs, 1238 based on Foata normal form. 16/9327 useless extension candidates. Maximal degree in co-relation 93213. Up to 9178 conditions per place. [2024-06-21 21:49:52,735 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 589 selfloop transitions, 54 changer transitions 0/646 dead transitions. [2024-06-21 21:49:52,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 646 transitions, 11573 flow [2024-06-21 21:49:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:49:52,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 21:49:52,736 INFO L175 Difference]: Start difference. First operand has 433 places, 607 transitions, 10013 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:49:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 646 transitions, 11573 flow [2024-06-21 21:49:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 646 transitions, 11393 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:57,437 INFO L231 Difference]: Finished difference. Result has 437 places, 616 transitions, 10151 flow [2024-06-21 21:49:57,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9833, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10151, PETRI_PLACES=437, PETRI_TRANSITIONS=616} [2024-06-21 21:49:57,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 21:49:57,438 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 616 transitions, 10151 flow [2024-06-21 21:49:57,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:57,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:57,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:49:57,439 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1698293056, now seen corresponding path program 3 times [2024-06-21 21:49:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551907106] [2024-06-21 21:49:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:00,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551907106] [2024-06-21 21:50:00,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551907106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:00,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:00,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:50:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606854613] [2024-06-21 21:50:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:50:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:50:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:50:00,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:50:00,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 616 transitions, 10151 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:00,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:00,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:50:00,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:03,121 INFO L124 PetriNetUnfolderBase]: 6017/9329 cut-off events. [2024-06-21 21:50:03,122 INFO L125 PetriNetUnfolderBase]: For 1354506/1354540 co-relation queries the response was YES. [2024-06-21 21:50:03,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93775 conditions, 9329 events. 6017/9329 cut-off events. For 1354506/1354540 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 57744 event pairs, 1242 based on Foata normal form. 26/9351 useless extension candidates. Maximal degree in co-relation 93563. Up to 9162 conditions per place. [2024-06-21 21:50:03,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 583 selfloop transitions, 58 changer transitions 0/644 dead transitions. [2024-06-21 21:50:03,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 644 transitions, 11648 flow [2024-06-21 21:50:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:50:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:50:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:50:03,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:50:03,292 INFO L175 Difference]: Start difference. First operand has 437 places, 616 transitions, 10151 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:50:03,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 644 transitions, 11648 flow [2024-06-21 21:50:07,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 644 transitions, 11470 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 21:50:08,009 INFO L231 Difference]: Finished difference. Result has 439 places, 619 transitions, 10204 flow [2024-06-21 21:50:08,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9973, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10204, PETRI_PLACES=439, PETRI_TRANSITIONS=619} [2024-06-21 21:50:08,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 21:50:08,025 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 619 transitions, 10204 flow [2024-06-21 21:50:08,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:08,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:08,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:08,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:50:08,028 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:08,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1443658956, now seen corresponding path program 4 times [2024-06-21 21:50:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:08,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337259419] [2024-06-21 21:50:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:08,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337259419] [2024-06-21 21:50:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337259419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:10,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465702019] [2024-06-21 21:50:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:10,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:10,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:10,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:10,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:50:10,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 619 transitions, 10204 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:10,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:10,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:50:10,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:13,861 INFO L124 PetriNetUnfolderBase]: 6064/9394 cut-off events. [2024-06-21 21:50:13,861 INFO L125 PetriNetUnfolderBase]: For 1408222/1408238 co-relation queries the response was YES. [2024-06-21 21:50:13,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95484 conditions, 9394 events. 6064/9394 cut-off events. For 1408222/1408238 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 58200 event pairs, 1238 based on Foata normal form. 19/9411 useless extension candidates. Maximal degree in co-relation 95271. Up to 8988 conditions per place. [2024-06-21 21:50:14,015 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 589 selfloop transitions, 122 changer transitions 0/714 dead transitions. [2024-06-21 21:50:14,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 714 transitions, 12917 flow [2024-06-21 21:50:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:50:14,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:50:14,017 INFO L175 Difference]: Start difference. First operand has 439 places, 619 transitions, 10204 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:50:14,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 714 transitions, 12917 flow [2024-06-21 21:50:18,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 714 transitions, 12718 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 21:50:18,664 INFO L231 Difference]: Finished difference. Result has 446 places, 675 transitions, 11427 flow [2024-06-21 21:50:18,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10005, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11427, PETRI_PLACES=446, PETRI_TRANSITIONS=675} [2024-06-21 21:50:18,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 21:50:18,665 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 675 transitions, 11427 flow [2024-06-21 21:50:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:18,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:18,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:50:18,666 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:18,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1704142448, now seen corresponding path program 5 times [2024-06-21 21:50:18,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848027556] [2024-06-21 21:50:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848027556] [2024-06-21 21:50:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848027556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:20,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114704395] [2024-06-21 21:50:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:20,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:21,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:50:21,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 675 transitions, 11427 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:21,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:21,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:50:21,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:24,847 INFO L124 PetriNetUnfolderBase]: 6119/9471 cut-off events. [2024-06-21 21:50:24,848 INFO L125 PetriNetUnfolderBase]: For 1486122/1486138 co-relation queries the response was YES. [2024-06-21 21:50:24,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99589 conditions, 9471 events. 6119/9471 cut-off events. For 1486122/1486138 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58681 event pairs, 1154 based on Foata normal form. 18/9487 useless extension candidates. Maximal degree in co-relation 99371. Up to 8412 conditions per place. [2024-06-21 21:50:25,035 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 511 selfloop transitions, 228 changer transitions 0/742 dead transitions. [2024-06-21 21:50:25,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 742 transitions, 14030 flow [2024-06-21 21:50:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:50:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:50:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:50:25,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 21:50:25,036 INFO L175 Difference]: Start difference. First operand has 446 places, 675 transitions, 11427 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:50:25,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 742 transitions, 14030 flow [2024-06-21 21:50:29,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 742 transitions, 13593 flow, removed 209 selfloop flow, removed 2 redundant places. [2024-06-21 21:50:29,824 INFO L231 Difference]: Finished difference. Result has 455 places, 696 transitions, 12348 flow [2024-06-21 21:50:29,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12348, PETRI_PLACES=455, PETRI_TRANSITIONS=696} [2024-06-21 21:50:29,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-21 21:50:29,825 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 696 transitions, 12348 flow [2024-06-21 21:50:29,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:29,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:29,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:29,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:50:29,825 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:29,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash -113678802, now seen corresponding path program 6 times [2024-06-21 21:50:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609989677] [2024-06-21 21:50:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:32,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:32,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609989677] [2024-06-21 21:50:32,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609989677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:32,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:32,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:32,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493379878] [2024-06-21 21:50:32,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 21:50:32,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 696 transitions, 12348 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:32,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 21:50:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:35,984 INFO L124 PetriNetUnfolderBase]: 6230/9624 cut-off events. [2024-06-21 21:50:35,985 INFO L125 PetriNetUnfolderBase]: For 1614990/1615006 co-relation queries the response was YES. [2024-06-21 21:50:36,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105787 conditions, 9624 events. 6230/9624 cut-off events. For 1614990/1615006 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 59504 event pairs, 1285 based on Foata normal form. 17/9639 useless extension candidates. Maximal degree in co-relation 105565. Up to 8626 conditions per place. [2024-06-21 21:50:36,171 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 511 selfloop transitions, 249 changer transitions 0/763 dead transitions. [2024-06-21 21:50:36,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 763 transitions, 15458 flow [2024-06-21 21:50:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:50:36,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:50:36,172 INFO L175 Difference]: Start difference. First operand has 455 places, 696 transitions, 12348 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:50:36,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 763 transitions, 15458 flow Killed by 15