./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe014_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_rmo.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-76401ed-m [2024-06-20 17:06:14,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:06:14,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:06:14,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:06:14,284 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:06:14,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:06:14,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:06:14,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:06:14,299 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:06:14,302 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:06:14,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:06:14,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:06:14,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:06:14,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:06:14,304 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:06:14,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:06:14,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:06:14,305 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:06:14,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:06:14,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:06:14,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:06:14,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:06:14,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:06:14,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:06:14,306 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:06:14,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:06:14,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:06:14,307 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:06:14,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:06:14,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:06:14,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:06:14,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:06:14,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:06:14,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:06:14,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:06:14,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:06:14,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:06:14,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:06:14,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:06:14,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:06:14,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:06:14,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:06:14,531 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:06:14,531 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:06:14,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.opt.i [2024-06-20 17:06:15,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:06:15,704 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:06:15,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.opt.i [2024-06-20 17:06:15,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ed0cd07/58de2630558942e7afde087068e4f9a1/FLAGa099a59f9 [2024-06-20 17:06:15,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ed0cd07/58de2630558942e7afde087068e4f9a1 [2024-06-20 17:06:15,729 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:06:15,729 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:06:15,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_rmo.opt.yml/witness.yml [2024-06-20 17:06:15,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:06:15,943 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:06:15,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:06:15,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:06:15,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:06:15,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:06:15" (1/2) ... [2024-06-20 17:06:15,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bebc581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:15, skipping insertion in model container [2024-06-20 17:06:15,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:06:15" (1/2) ... [2024-06-20 17:06:15,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c568703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:15, skipping insertion in model container [2024-06-20 17:06:15,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:15" (2/2) ... [2024-06-20 17:06:15,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bebc581 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:15, skipping insertion in model container [2024-06-20 17:06:15,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:15" (2/2) ... [2024-06-20 17:06:15,953 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:06:16,060 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:06:16,061 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-20 17:06:16,061 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-20 17:06:16,061 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-20 17:06:16,062 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:06:16,062 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-20 17:06:16,100 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:06:16,407 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:06:16,420 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:06:16,553 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:06:16,585 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:06:16,586 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16 WrapperNode [2024-06-20 17:06:16,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:06:16,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:06:16,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:06:16,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:06:16,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,687 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-20 17:06:16,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:06:16,688 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:06:16,688 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:06:16,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:06:16,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,741 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-20 17:06:16,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:06:16,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:06:16,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:06:16,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:06:16,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (1/1) ... [2024-06-20 17:06:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:06:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:06:16,825 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) [2024-06-20 17:06:16,845 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 [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:06:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:06:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:06:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:06:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:06:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:06:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:06:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:06:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:06:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:06:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:06:16,858 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:06:16,986 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:06:16,988 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:06:17,575 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:06:17,575 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:06:18,064 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:06:18,064 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:06:18,065 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:06:18 BoogieIcfgContainer [2024-06-20 17:06:18,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:06:18,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:06:18,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:06:18,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:06:18,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:06:15" (1/4) ... [2024-06-20 17:06:18,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af61b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:06:18, skipping insertion in model container [2024-06-20 17:06:18,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:15" (2/4) ... [2024-06-20 17:06:18,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af61b35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:06:18, skipping insertion in model container [2024-06-20 17:06:18,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:16" (3/4) ... [2024-06-20 17:06:18,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af61b35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:06:18, skipping insertion in model container [2024-06-20 17:06:18,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:06:18" (4/4) ... [2024-06-20 17:06:18,073 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.opt.i [2024-06-20 17:06:18,087 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:06:18,087 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:06:18,087 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:06:18,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:06:18,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:06:18,202 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:06:18,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:06:18,204 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 59 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. [2024-06-20 17:06:18,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:06:18,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:06:18,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:06:18,224 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;@2c41033b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:06:18,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:06:18,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:06:18,230 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:06:18,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:06:18,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:18,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:06:18,231 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)] === [2024-06-20 17:06:18,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash 905692193, now seen corresponding path program 1 times [2024-06-20 17:06:18,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:18,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095770705] [2024-06-20 17:06:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:20,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095770705] [2024-06-20 17:06:20,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095770705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:20,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:20,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:06:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825848573] [2024-06-20 17:06:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:06:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:06:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:06:20,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:20,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:20,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:20,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:20,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:20,696 INFO L124 PetriNetUnfolderBase]: 1094/1669 cut-off events. [2024-06-20 17:06:20,696 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-20 17:06:20,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3393 conditions, 1669 events. 1094/1669 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 566 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 3381. Up to 1632 conditions per place. [2024-06-20 17:06:20,707 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 17:06:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-20 17:06:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:06:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:06:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 17:06:20,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 17:06:20,717 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-20 17:06:20,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-20 17:06:20,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:20,721 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:06:20,722 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} [2024-06-20 17:06:20,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:06:20,724 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:06:20,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:20,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:20,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:06:20,725 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)] === [2024-06-20 17:06:20,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1807711338, now seen corresponding path program 1 times [2024-06-20 17:06:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358364780] [2024-06-20 17:06:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358364780] [2024-06-20 17:06:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358364780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:23,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:23,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250232324] [2024-06-20 17:06:23,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:23,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:23,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:23,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-20 17:06:23,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:23,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:24,526 INFO L124 PetriNetUnfolderBase]: 1391/2103 cut-off events. [2024-06-20 17:06:24,526 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-20 17:06:24,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4836 conditions, 2103 events. 1391/2103 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9709 event pairs, 503 based on Foata normal form. 6/2108 useless extension candidates. Maximal degree in co-relation 4824. Up to 2006 conditions per place. [2024-06-20 17:06:24,535 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-06-20 17:06:24,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 244 flow [2024-06-20 17:06:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:06:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:06:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-20 17:06:24,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:06:24,537 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 84 transitions. [2024-06-20 17:06:24,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 244 flow [2024-06-20 17:06:24,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:06:24,539 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 125 flow [2024-06-20 17:06:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-20 17:06:24,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-06-20 17:06:24,540 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 125 flow [2024-06-20 17:06:24,540 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) [2024-06-20 17:06:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:06:24,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 32359070, now seen corresponding path program 1 times [2024-06-20 17:06:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065277866] [2024-06-20 17:06:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:26,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:26,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065277866] [2024-06-20 17:06:26,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065277866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:26,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:26,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009582494] [2024-06-20 17:06:26,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:26,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:26,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:26,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:26,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:26,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:26,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:26,834 INFO L124 PetriNetUnfolderBase]: 1080/1670 cut-off events. [2024-06-20 17:06:26,835 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-06-20 17:06:26,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4159 conditions, 1670 events. 1080/1670 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7871 event pairs, 439 based on Foata normal form. 2/1671 useless extension candidates. Maximal degree in co-relation 4144. Up to 1590 conditions per place. [2024-06-20 17:06:26,841 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-20 17:06:26,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 319 flow [2024-06-20 17:06:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:06:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:06:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-20 17:06:26,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 17:06:26,843 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 125 flow. Second operand 5 states and 93 transitions. [2024-06-20 17:06:26,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 319 flow [2024-06-20 17:06:26,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:26,846 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 187 flow [2024-06-20 17:06:26,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-06-20 17:06:26,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-20 17:06:26,846 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 187 flow [2024-06-20 17:06:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:26,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:26,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:06:26,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1003698927, now seen corresponding path program 1 times [2024-06-20 17:06:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036598605] [2024-06-20 17:06:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036598605] [2024-06-20 17:06:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036598605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:28,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481889462] [2024-06-20 17:06:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:28,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:28,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:28,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:28,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:28,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:29,116 INFO L124 PetriNetUnfolderBase]: 1070/1641 cut-off events. [2024-06-20 17:06:29,116 INFO L125 PetriNetUnfolderBase]: For 1592/1594 co-relation queries the response was YES. [2024-06-20 17:06:29,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4654 conditions, 1641 events. 1070/1641 cut-off events. For 1592/1594 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7732 event pairs, 469 based on Foata normal form. 6/1646 useless extension candidates. Maximal degree in co-relation 4636. Up to 1582 conditions per place. [2024-06-20 17:06:29,123 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-20 17:06:29,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 340 flow [2024-06-20 17:06:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:06:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:06:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-20 17:06:29,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:06:29,127 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 187 flow. Second operand 5 states and 91 transitions. [2024-06-20 17:06:29,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 340 flow [2024-06-20 17:06:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 332 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:06:29,132 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-20 17:06:29,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-20 17:06:29,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-20 17:06:29,134 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-20 17:06:29,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:29,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:29,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:29,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:06:29,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:29,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1908808116, now seen corresponding path program 1 times [2024-06-20 17:06:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370612976] [2024-06-20 17:06:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:31,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370612976] [2024-06-20 17:06:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370612976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:31,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428235634] [2024-06-20 17:06:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:31,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:31,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 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) [2024-06-20 17:06:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:31,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:32,529 INFO L124 PetriNetUnfolderBase]: 1410/2150 cut-off events. [2024-06-20 17:06:32,529 INFO L125 PetriNetUnfolderBase]: For 2679/2679 co-relation queries the response was YES. [2024-06-20 17:06:32,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 2150 events. 1410/2150 cut-off events. For 2679/2679 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9963 event pairs, 473 based on Foata normal form. 2/2151 useless extension candidates. Maximal degree in co-relation 6261. Up to 1950 conditions per place. [2024-06-20 17:06:32,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-20 17:06:32,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 464 flow [2024-06-20 17:06:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:06:32,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:06:32,541 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:06:32,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 464 flow [2024-06-20 17:06:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:32,544 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 298 flow [2024-06-20 17:06:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-20 17:06:32,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-20 17:06:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 298 flow [2024-06-20 17:06:32,545 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) [2024-06-20 17:06:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:32,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:06:32,546 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)] === [2024-06-20 17:06:32,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1892601006, now seen corresponding path program 2 times [2024-06-20 17:06:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198319218] [2024-06-20 17:06:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198319218] [2024-06-20 17:06:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198319218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:34,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:34,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938614524] [2024-06-20 17:06:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:34,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 298 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) [2024-06-20 17:06:34,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:34,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:34,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:35,831 INFO L124 PetriNetUnfolderBase]: 1405/2149 cut-off events. [2024-06-20 17:06:35,831 INFO L125 PetriNetUnfolderBase]: For 4613/4621 co-relation queries the response was YES. [2024-06-20 17:06:35,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6998 conditions, 2149 events. 1405/2149 cut-off events. For 4613/4621 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10075 event pairs, 533 based on Foata normal form. 10/2158 useless extension candidates. Maximal degree in co-relation 6974. Up to 1892 conditions per place. [2024-06-20 17:06:35,840 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 24 changer transitions 0/82 dead transitions. [2024-06-20 17:06:35,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 574 flow [2024-06-20 17:06:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 17:06:35,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:06:35,843 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 298 flow. Second operand 6 states and 108 transitions. [2024-06-20 17:06:35,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 574 flow [2024-06-20 17:06:35,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 548 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:35,850 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 401 flow [2024-06-20 17:06:35,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-20 17:06:35,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-20 17:06:35,853 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 401 flow [2024-06-20 17:06:35,853 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) [2024-06-20 17:06:35,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:35,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:35,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:06:35,854 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)] === [2024-06-20 17:06:35,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1812927346, now seen corresponding path program 1 times [2024-06-20 17:06:35,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:35,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173131820] [2024-06-20 17:06:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:35,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173131820] [2024-06-20 17:06:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173131820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:38,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:38,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:38,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395156567] [2024-06-20 17:06:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:38,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:38,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 401 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:38,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:38,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:38,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:38,885 INFO L124 PetriNetUnfolderBase]: 1106/1699 cut-off events. [2024-06-20 17:06:38,886 INFO L125 PetriNetUnfolderBase]: For 4804/4806 co-relation queries the response was YES. [2024-06-20 17:06:38,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6118 conditions, 1699 events. 1106/1699 cut-off events. For 4804/4806 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8088 event pairs, 419 based on Foata normal form. 6/1704 useless extension candidates. Maximal degree in co-relation 6091. Up to 1612 conditions per place. [2024-06-20 17:06:38,896 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 64 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-20 17:06:38,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 619 flow [2024-06-20 17:06:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:06:38,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 17:06:38,898 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 401 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:06:38,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 619 flow [2024-06-20 17:06:38,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 585 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:38,904 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 418 flow [2024-06-20 17:06:38,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-06-20 17:06:38,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-20 17:06:38,905 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 418 flow [2024-06-20 17:06:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:38,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:38,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:06:38,906 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)] === [2024-06-20 17:06:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1518238311, now seen corresponding path program 1 times [2024-06-20 17:06:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:38,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836393967] [2024-06-20 17:06:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:41,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:41,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836393967] [2024-06-20 17:06:41,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836393967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:41,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:41,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593554318] [2024-06-20 17:06:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:41,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:41,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:41,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:41,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:41,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:41,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:42,237 INFO L124 PetriNetUnfolderBase]: 1379/2105 cut-off events. [2024-06-20 17:06:42,237 INFO L125 PetriNetUnfolderBase]: For 5921/5921 co-relation queries the response was YES. [2024-06-20 17:06:42,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7351 conditions, 2105 events. 1379/2105 cut-off events. For 5921/5921 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9723 event pairs, 463 based on Foata normal form. 4/2108 useless extension candidates. Maximal degree in co-relation 7321. Up to 1911 conditions per place. [2024-06-20 17:06:42,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-20 17:06:42,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 630 flow [2024-06-20 17:06:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:06:42,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 17:06:42,249 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 418 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:06:42,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 630 flow [2024-06-20 17:06:42,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 593 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:42,255 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 431 flow [2024-06-20 17:06:42,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=431, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-06-20 17:06:42,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 17:06:42,256 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 431 flow [2024-06-20 17:06:42,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:42,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:42,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:06:42,256 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)] === [2024-06-20 17:06:42,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1458917925, now seen corresponding path program 2 times [2024-06-20 17:06:42,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:42,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730245901] [2024-06-20 17:06:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:42,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:44,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730245901] [2024-06-20 17:06:44,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730245901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:44,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:44,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:44,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206163093] [2024-06-20 17:06:44,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:44,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:44,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:44,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:44,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:44,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:44,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:44,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:45,327 INFO L124 PetriNetUnfolderBase]: 1405/2145 cut-off events. [2024-06-20 17:06:45,328 INFO L125 PetriNetUnfolderBase]: For 7923/7940 co-relation queries the response was YES. [2024-06-20 17:06:45,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 2145 events. 1405/2145 cut-off events. For 7923/7940 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10013 event pairs, 491 based on Foata normal form. 15/2159 useless extension candidates. Maximal degree in co-relation 7715. Up to 1882 conditions per place. [2024-06-20 17:06:45,337 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2024-06-20 17:06:45,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 716 flow [2024-06-20 17:06:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:06:45,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:06:45,343 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 431 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:06:45,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 716 flow [2024-06-20 17:06:45,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 666 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:45,349 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 474 flow [2024-06-20 17:06:45,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-20 17:06:45,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 17:06:45,350 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 474 flow [2024-06-20 17:06:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:45,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:45,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:45,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:06:45,351 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)] === [2024-06-20 17:06:45,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1475893215, now seen corresponding path program 3 times [2024-06-20 17:06:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765856965] [2024-06-20 17:06:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765856965] [2024-06-20 17:06:47,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765856965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:47,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:47,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:47,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002000283] [2024-06-20 17:06:47,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:47,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:47,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:47,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 474 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) [2024-06-20 17:06:47,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:48,871 INFO L124 PetriNetUnfolderBase]: 1395/2135 cut-off events. [2024-06-20 17:06:48,871 INFO L125 PetriNetUnfolderBase]: For 7530/7546 co-relation queries the response was YES. [2024-06-20 17:06:48,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7682 conditions, 2135 events. 1395/2135 cut-off events. For 7530/7546 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9947 event pairs, 521 based on Foata normal form. 20/2154 useless extension candidates. Maximal degree in co-relation 7651. Up to 1874 conditions per place. [2024-06-20 17:06:48,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 27 changer transitions 0/91 dead transitions. [2024-06-20 17:06:48,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 714 flow [2024-06-20 17:06:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:06:48,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:06:48,883 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 474 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:06:48,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 714 flow [2024-06-20 17:06:48,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 638 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:48,890 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 460 flow [2024-06-20 17:06:48,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=460, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-06-20 17:06:48,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-20 17:06:48,891 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 460 flow [2024-06-20 17:06:48,891 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) [2024-06-20 17:06:48,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:48,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:06:48,892 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:48,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash -838046534, now seen corresponding path program 1 times [2024-06-20 17:06:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:48,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125188441] [2024-06-20 17:06:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125188441] [2024-06-20 17:06:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125188441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:50,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802789708] [2024-06-20 17:06:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:50,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:50,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 460 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:50,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:50,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:50,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:51,446 INFO L124 PetriNetUnfolderBase]: 1106/1705 cut-off events. [2024-06-20 17:06:51,446 INFO L125 PetriNetUnfolderBase]: For 6785/6785 co-relation queries the response was YES. [2024-06-20 17:06:51,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6432 conditions, 1705 events. 1106/1705 cut-off events. For 6785/6785 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8080 event pairs, 449 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 6401. Up to 1642 conditions per place. [2024-06-20 17:06:51,453 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 62 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-20 17:06:51,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 648 flow [2024-06-20 17:06:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:06:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:06:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-20 17:06:51,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-20 17:06:51,465 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 460 flow. Second operand 5 states and 86 transitions. [2024-06-20 17:06:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 648 flow [2024-06-20 17:06:51,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 554 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:06:51,470 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 413 flow [2024-06-20 17:06:51,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-20 17:06:51,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 17:06:51,471 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 413 flow [2024-06-20 17:06:51,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:51,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:51,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:51,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:06:51,472 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)] === [2024-06-20 17:06:51,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1261678455, now seen corresponding path program 1 times [2024-06-20 17:06:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:51,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454691273] [2024-06-20 17:06:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:51,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454691273] [2024-06-20 17:06:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454691273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:53,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932908403] [2024-06-20 17:06:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:53,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:53,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 413 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) [2024-06-20 17:06:53,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:53,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:53,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:54,525 INFO L124 PetriNetUnfolderBase]: 1558/2409 cut-off events. [2024-06-20 17:06:54,525 INFO L125 PetriNetUnfolderBase]: For 10615/10615 co-relation queries the response was YES. [2024-06-20 17:06:54,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8998 conditions, 2409 events. 1558/2409 cut-off events. For 10615/10615 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11671 event pairs, 249 based on Foata normal form. 4/2412 useless extension candidates. Maximal degree in co-relation 8968. Up to 1833 conditions per place. [2024-06-20 17:06:54,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-20 17:06:54,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 777 flow [2024-06-20 17:06:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:06:54,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:06:54,570 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 413 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:06:54,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 777 flow [2024-06-20 17:06:54,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 754 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:54,598 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 479 flow [2024-06-20 17:06:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-20 17:06:54,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:06:54,600 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 479 flow [2024-06-20 17:06:54,600 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) [2024-06-20 17:06:54,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:54,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:54,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:06:54,601 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)] === [2024-06-20 17:06:54,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1501621455, now seen corresponding path program 2 times [2024-06-20 17:06:54,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:54,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554036772] [2024-06-20 17:06:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:57,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554036772] [2024-06-20 17:06:57,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554036772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:57,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:57,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905435493] [2024-06-20 17:06:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:57,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:57,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:06:57,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 479 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) [2024-06-20 17:06:57,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:57,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:06:57,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:58,357 INFO L124 PetriNetUnfolderBase]: 1550/2397 cut-off events. [2024-06-20 17:06:58,357 INFO L125 PetriNetUnfolderBase]: For 12902/12902 co-relation queries the response was YES. [2024-06-20 17:06:58,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 2397 events. 1550/2397 cut-off events. For 12902/12902 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11716 event pairs, 460 based on Foata normal form. 4/2400 useless extension candidates. Maximal degree in co-relation 9372. Up to 2169 conditions per place. [2024-06-20 17:06:58,367 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-20 17:06:58,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 761 flow [2024-06-20 17:06:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:06:58,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:06:58,369 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 479 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:06:58,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 761 flow [2024-06-20 17:06:58,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 723 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:58,383 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 516 flow [2024-06-20 17:06:58,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-06-20 17:06:58,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 17:06:58,384 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 516 flow [2024-06-20 17:06:58,385 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) [2024-06-20 17:06:58,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:58,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:06:58,385 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)] === [2024-06-20 17:06:58,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2018361103, now seen corresponding path program 3 times [2024-06-20 17:06:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:58,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637629089] [2024-06-20 17:06:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637629089] [2024-06-20 17:07:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637629089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:00,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630698512] [2024-06-20 17:07:00,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:00,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:00,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:00,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 516 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) [2024-06-20 17:07:00,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:00,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:00,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:01,740 INFO L124 PetriNetUnfolderBase]: 1542/2393 cut-off events. [2024-06-20 17:07:01,740 INFO L125 PetriNetUnfolderBase]: For 15119/15131 co-relation queries the response was YES. [2024-06-20 17:07:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 2393 events. 1542/2393 cut-off events. For 15119/15131 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11757 event pairs, 526 based on Foata normal form. 16/2408 useless extension candidates. Maximal degree in co-relation 9658. Up to 2096 conditions per place. [2024-06-20 17:07:01,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 29 changer transitions 0/101 dead transitions. [2024-06-20 17:07:01,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 800 flow [2024-06-20 17:07:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:07:01,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:07:01,753 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 516 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:07:01,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 800 flow [2024-06-20 17:07:01,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 747 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:01,766 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 556 flow [2024-06-20 17:07:01,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-06-20 17:07:01,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 17:07:01,767 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 556 flow [2024-06-20 17:07:01,767 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) [2024-06-20 17:07:01,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:01,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:01,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:07:01,768 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:01,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:01,768 INFO L85 PathProgramCache]: Analyzing trace with hash -235554625, now seen corresponding path program 1 times [2024-06-20 17:07:01,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:01,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739917229] [2024-06-20 17:07:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:01,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:03,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739917229] [2024-06-20 17:07:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739917229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:03,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:03,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:03,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024456995] [2024-06-20 17:07:03,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:03,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:03,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 556 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) [2024-06-20 17:07:03,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:03,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:03,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:04,854 INFO L124 PetriNetUnfolderBase]: 1536/2380 cut-off events. [2024-06-20 17:07:04,854 INFO L125 PetriNetUnfolderBase]: For 17077/17077 co-relation queries the response was YES. [2024-06-20 17:07:04,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9949 conditions, 2380 events. 1536/2380 cut-off events. For 17077/17077 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11668 event pairs, 505 based on Foata normal form. 2/2382 useless extension candidates. Maximal degree in co-relation 9915. Up to 2317 conditions per place. [2024-06-20 17:07:04,865 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 79 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-20 17:07:04,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 816 flow [2024-06-20 17:07:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-20 17:07:04,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:07:04,866 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 556 flow. Second operand 6 states and 92 transitions. [2024-06-20 17:07:04,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 816 flow [2024-06-20 17:07:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 94 transitions, 737 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:04,879 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 579 flow [2024-06-20 17:07:04,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-20 17:07:04,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 17:07:04,880 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 579 flow [2024-06-20 17:07:04,880 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) [2024-06-20 17:07:04,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:04,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:07:04,881 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)] === [2024-06-20 17:07:04,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1265633594, now seen corresponding path program 1 times [2024-06-20 17:07:04,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809588252] [2024-06-20 17:07:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809588252] [2024-06-20 17:07:07,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809588252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:07,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:07,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242820697] [2024-06-20 17:07:07,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:07,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:07,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:07,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:07,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:07,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:08,620 INFO L124 PetriNetUnfolderBase]: 1604/2493 cut-off events. [2024-06-20 17:07:08,620 INFO L125 PetriNetUnfolderBase]: For 20312/20312 co-relation queries the response was YES. [2024-06-20 17:07:08,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 2493 events. 1604/2493 cut-off events. For 20312/20312 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12261 event pairs, 259 based on Foata normal form. 16/2508 useless extension candidates. Maximal degree in co-relation 10523. Up to 1827 conditions per place. [2024-06-20 17:07:08,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 28 changer transitions 0/121 dead transitions. [2024-06-20 17:07:08,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 975 flow [2024-06-20 17:07:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 17:07:08,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 17:07:08,645 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 579 flow. Second operand 7 states and 132 transitions. [2024-06-20 17:07:08,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 975 flow [2024-06-20 17:07:08,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 967 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:07:08,660 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 648 flow [2024-06-20 17:07:08,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-06-20 17:07:08,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-20 17:07:08,660 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 648 flow [2024-06-20 17:07:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:08,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:08,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:08,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:07:08,661 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)] === [2024-06-20 17:07:08,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:08,661 INFO L85 PathProgramCache]: Analyzing trace with hash -901660588, now seen corresponding path program 2 times [2024-06-20 17:07:08,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:08,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906294932] [2024-06-20 17:07:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:08,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:11,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906294932] [2024-06-20 17:07:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906294932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:11,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044346446] [2024-06-20 17:07:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:11,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 648 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:11,987 INFO L124 PetriNetUnfolderBase]: 1568/2437 cut-off events. [2024-06-20 17:07:11,988 INFO L125 PetriNetUnfolderBase]: For 21614/21614 co-relation queries the response was YES. [2024-06-20 17:07:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10502 conditions, 2437 events. 1568/2437 cut-off events. For 21614/21614 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11948 event pairs, 367 based on Foata normal form. 20/2456 useless extension candidates. Maximal degree in co-relation 10462. Up to 2029 conditions per place. [2024-06-20 17:07:11,998 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-20 17:07:11,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 116 transitions, 962 flow [2024-06-20 17:07:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:07:12,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 17:07:12,000 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 648 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:07:12,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 116 transitions, 962 flow [2024-06-20 17:07:12,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 116 transitions, 912 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:12,017 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 656 flow [2024-06-20 17:07:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=656, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-06-20 17:07:12,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-20 17:07:12,018 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 656 flow [2024-06-20 17:07:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:07:12,019 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)] === [2024-06-20 17:07:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -649791000, now seen corresponding path program 3 times [2024-06-20 17:07:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892305388] [2024-06-20 17:07:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892305388] [2024-06-20 17:07:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892305388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:14,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:14,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481441375] [2024-06-20 17:07:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:14,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:14,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 656 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:14,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:14,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:14,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:15,614 INFO L124 PetriNetUnfolderBase]: 1656/2587 cut-off events. [2024-06-20 17:07:15,615 INFO L125 PetriNetUnfolderBase]: For 25424/25438 co-relation queries the response was YES. [2024-06-20 17:07:15,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11170 conditions, 2587 events. 1656/2587 cut-off events. For 25424/25438 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12997 event pairs, 468 based on Foata normal form. 29/2615 useless extension candidates. Maximal degree in co-relation 11129. Up to 2172 conditions per place. [2024-06-20 17:07:15,627 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 27 changer transitions 0/117 dead transitions. [2024-06-20 17:07:15,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 986 flow [2024-06-20 17:07:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:07:15,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:07:15,630 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 656 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:07:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 986 flow [2024-06-20 17:07:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 914 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:15,649 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 663 flow [2024-06-20 17:07:15,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-06-20 17:07:15,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-20 17:07:15,650 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 663 flow [2024-06-20 17:07:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:15,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:07:15,651 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)] === [2024-06-20 17:07:15,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 994211390, now seen corresponding path program 4 times [2024-06-20 17:07:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984313997] [2024-06-20 17:07:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:18,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:18,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984313997] [2024-06-20 17:07:18,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984313997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:18,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:18,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949480738] [2024-06-20 17:07:18,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:18,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:18,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 663 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) [2024-06-20 17:07:18,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:18,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:18,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:19,578 INFO L124 PetriNetUnfolderBase]: 1744/2739 cut-off events. [2024-06-20 17:07:19,578 INFO L125 PetriNetUnfolderBase]: For 28462/28474 co-relation queries the response was YES. [2024-06-20 17:07:19,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11814 conditions, 2739 events. 1744/2739 cut-off events. For 28462/28474 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13981 event pairs, 522 based on Foata normal form. 32/2770 useless extension candidates. Maximal degree in co-relation 11772. Up to 2320 conditions per place. [2024-06-20 17:07:19,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/123 dead transitions. [2024-06-20 17:07:19,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 1019 flow [2024-06-20 17:07:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:07:19,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:07:19,610 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 663 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:07:19,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 1019 flow [2024-06-20 17:07:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 958 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:19,635 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 689 flow [2024-06-20 17:07:19,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=689, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-06-20 17:07:19,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 17:07:19,636 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 689 flow [2024-06-20 17:07:19,636 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) [2024-06-20 17:07:19,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:19,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:19,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:07:19,637 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)] === [2024-06-20 17:07:19,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1855316634, now seen corresponding path program 5 times [2024-06-20 17:07:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:19,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935992704] [2024-06-20 17:07:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:19,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:22,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935992704] [2024-06-20 17:07:22,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935992704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:22,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:22,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430173583] [2024-06-20 17:07:22,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:22,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:22,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 689 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) [2024-06-20 17:07:22,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:22,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:22,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:23,865 INFO L124 PetriNetUnfolderBase]: 1756/2767 cut-off events. [2024-06-20 17:07:23,866 INFO L125 PetriNetUnfolderBase]: For 29998/30010 co-relation queries the response was YES. [2024-06-20 17:07:23,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11928 conditions, 2767 events. 1756/2767 cut-off events. For 29998/30010 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14238 event pairs, 502 based on Foata normal form. 28/2794 useless extension candidates. Maximal degree in co-relation 11885. Up to 2214 conditions per place. [2024-06-20 17:07:23,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 33 changer transitions 0/133 dead transitions. [2024-06-20 17:07:23,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1089 flow [2024-06-20 17:07:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:07:23,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:07:23,879 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 689 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:07:23,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1089 flow [2024-06-20 17:07:23,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1020 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:23,903 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 714 flow [2024-06-20 17:07:23,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2024-06-20 17:07:23,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-20 17:07:23,910 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 714 flow [2024-06-20 17:07:23,910 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) [2024-06-20 17:07:23,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:23,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:07:23,911 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)] === [2024-06-20 17:07:23,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:23,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1553901572, now seen corresponding path program 1 times [2024-06-20 17:07:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:23,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614705263] [2024-06-20 17:07:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:23,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:26,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:26,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614705263] [2024-06-20 17:07:26,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614705263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:26,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:26,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:26,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470635680] [2024-06-20 17:07:26,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:26,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:26,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 714 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:26,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:27,888 INFO L124 PetriNetUnfolderBase]: 1736/2731 cut-off events. [2024-06-20 17:07:27,889 INFO L125 PetriNetUnfolderBase]: For 30491/30505 co-relation queries the response was YES. [2024-06-20 17:07:27,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11706 conditions, 2731 events. 1736/2731 cut-off events. For 30491/30505 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13957 event pairs, 429 based on Foata normal form. 21/2751 useless extension candidates. Maximal degree in co-relation 11662. Up to 1884 conditions per place. [2024-06-20 17:07:27,902 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 31 changer transitions 0/121 dead transitions. [2024-06-20 17:07:27,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 121 transitions, 1016 flow [2024-06-20 17:07:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:07:27,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:07:27,905 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 714 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:07:27,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 121 transitions, 1016 flow [2024-06-20 17:07:27,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 934 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:27,931 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 664 flow [2024-06-20 17:07:27,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2024-06-20 17:07:27,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 17:07:27,932 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 664 flow [2024-06-20 17:07:27,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:27,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:27,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:27,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:07:27,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:27,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 267817243, now seen corresponding path program 1 times [2024-06-20 17:07:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:27,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255626769] [2024-06-20 17:07:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:30,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:30,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255626769] [2024-06-20 17:07:30,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255626769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:30,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:30,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952933885] [2024-06-20 17:07:30,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:30,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:30,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 664 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 17:07:30,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:30,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:30,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:31,063 INFO L124 PetriNetUnfolderBase]: 1631/2626 cut-off events. [2024-06-20 17:07:31,063 INFO L125 PetriNetUnfolderBase]: For 31042/31054 co-relation queries the response was YES. [2024-06-20 17:07:31,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11418 conditions, 2626 events. 1631/2626 cut-off events. For 31042/31054 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13736 event pairs, 513 based on Foata normal form. 14/2639 useless extension candidates. Maximal degree in co-relation 11373. Up to 2436 conditions per place. [2024-06-20 17:07:31,074 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 23 changer transitions 0/114 dead transitions. [2024-06-20 17:07:31,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 114 transitions, 1064 flow [2024-06-20 17:07:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:07:31,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:07:31,076 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 664 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:07:31,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 114 transitions, 1064 flow [2024-06-20 17:07:31,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 114 transitions, 971 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:31,098 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 721 flow [2024-06-20 17:07:31,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-20 17:07:31,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-20 17:07:31,098 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 721 flow [2024-06-20 17:07:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 17:07:31,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:31,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:07:31,099 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:31,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:31,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2118010805, now seen corresponding path program 2 times [2024-06-20 17:07:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:31,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064435721] [2024-06-20 17:07:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:31,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064435721] [2024-06-20 17:07:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064435721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:33,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:33,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:33,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307800761] [2024-06-20 17:07:33,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:33,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:33,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:33,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:33,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 17:07:33,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:33,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:33,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:34,010 INFO L124 PetriNetUnfolderBase]: 1674/2676 cut-off events. [2024-06-20 17:07:34,010 INFO L125 PetriNetUnfolderBase]: For 34522/34522 co-relation queries the response was YES. [2024-06-20 17:07:34,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12001 conditions, 2676 events. 1674/2676 cut-off events. For 34522/34522 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13981 event pairs, 545 based on Foata normal form. 3/2677 useless extension candidates. Maximal degree in co-relation 11955. Up to 2548 conditions per place. [2024-06-20 17:07:34,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-20 17:07:34,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 120 transitions, 1097 flow [2024-06-20 17:07:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:07:34,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-20 17:07:34,025 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 721 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:07:34,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 120 transitions, 1097 flow [2024-06-20 17:07:34,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 1063 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 17:07:34,054 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 847 flow [2024-06-20 17:07:34,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=847, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-06-20 17:07:34,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-20 17:07:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 847 flow [2024-06-20 17:07:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 17:07:34,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:34,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:07:34,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:34,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash -842826050, now seen corresponding path program 1 times [2024-06-20 17:07:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:34,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059333086] [2024-06-20 17:07:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059333086] [2024-06-20 17:07:36,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059333086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:36,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:36,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803636022] [2024-06-20 17:07:36,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:36,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:36,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:36,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:36,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 847 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:36,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:36,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:36,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:37,516 INFO L124 PetriNetUnfolderBase]: 1813/2840 cut-off events. [2024-06-20 17:07:37,516 INFO L125 PetriNetUnfolderBase]: For 39658/39658 co-relation queries the response was YES. [2024-06-20 17:07:37,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13213 conditions, 2840 events. 1813/2840 cut-off events. For 39658/39658 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14685 event pairs, 552 based on Foata normal form. 4/2843 useless extension candidates. Maximal degree in co-relation 13163. Up to 2712 conditions per place. [2024-06-20 17:07:37,531 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 96 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-20 17:07:37,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 122 transitions, 1154 flow [2024-06-20 17:07:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 17:07:37,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-20 17:07:37,533 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 847 flow. Second operand 6 states and 97 transitions. [2024-06-20 17:07:37,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 122 transitions, 1154 flow [2024-06-20 17:07:37,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 122 transitions, 1104 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:37,560 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 882 flow [2024-06-20 17:07:37,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=882, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2024-06-20 17:07:37,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-20 17:07:37,560 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 882 flow [2024-06-20 17:07:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:37,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:37,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:37,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:07:37,561 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:37,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2126889860, now seen corresponding path program 2 times [2024-06-20 17:07:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:37,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137546790] [2024-06-20 17:07:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:37,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137546790] [2024-06-20 17:07:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137546790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165607302] [2024-06-20 17:07:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:40,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:40,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:40,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:40,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:40,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:41,476 INFO L124 PetriNetUnfolderBase]: 1801/2824 cut-off events. [2024-06-20 17:07:41,476 INFO L125 PetriNetUnfolderBase]: For 42060/42060 co-relation queries the response was YES. [2024-06-20 17:07:41,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13535 conditions, 2824 events. 1801/2824 cut-off events. For 42060/42060 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14595 event pairs, 550 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 13483. Up to 2680 conditions per place. [2024-06-20 17:07:41,492 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 99 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-20 17:07:41,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 128 transitions, 1219 flow [2024-06-20 17:07:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:07:41,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 17:07:41,494 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 882 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:07:41,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 128 transitions, 1219 flow [2024-06-20 17:07:41,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 128 transitions, 1160 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:41,524 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 915 flow [2024-06-20 17:07:41,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2024-06-20 17:07:41,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 17:07:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 915 flow [2024-06-20 17:07:41,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:41,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:41,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:41,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:07:41,525 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:41,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1087849668, now seen corresponding path program 1 times [2024-06-20 17:07:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:41,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514886757] [2024-06-20 17:07:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:41,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514886757] [2024-06-20 17:07:43,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514886757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:43,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5500640] [2024-06-20 17:07:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:43,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:43,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:43,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 915 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2024-06-20 17:07:43,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:43,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:44,556 INFO L124 PetriNetUnfolderBase]: 1690/2713 cut-off events. [2024-06-20 17:07:44,557 INFO L125 PetriNetUnfolderBase]: For 43253/43269 co-relation queries the response was YES. [2024-06-20 17:07:44,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13340 conditions, 2713 events. 1690/2713 cut-off events. For 43253/43269 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14202 event pairs, 500 based on Foata normal form. 18/2726 useless extension candidates. Maximal degree in co-relation 13287. Up to 2510 conditions per place. [2024-06-20 17:07:44,578 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-06-20 17:07:44,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 133 transitions, 1291 flow [2024-06-20 17:07:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:07:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:07:44,581 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 915 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:07:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 133 transitions, 1291 flow [2024-06-20 17:07:44,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1225 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:44,612 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 947 flow [2024-06-20 17:07:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=947, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-20 17:07:44,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-20 17:07:44,613 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 947 flow [2024-06-20 17:07:44,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2024-06-20 17:07:44,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:44,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:07:44,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash -286732836, now seen corresponding path program 1 times [2024-06-20 17:07:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:44,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624455471] [2024-06-20 17:07:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624455471] [2024-06-20 17:07:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624455471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915965013] [2024-06-20 17:07:47,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:47,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:47,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 947 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:47,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:47,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:47,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:48,472 INFO L124 PetriNetUnfolderBase]: 1831/2865 cut-off events. [2024-06-20 17:07:48,472 INFO L125 PetriNetUnfolderBase]: For 45595/45601 co-relation queries the response was YES. [2024-06-20 17:07:48,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14012 conditions, 2865 events. 1831/2865 cut-off events. For 45595/45601 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14777 event pairs, 539 based on Foata normal form. 8/2873 useless extension candidates. Maximal degree in co-relation 13958. Up to 2672 conditions per place. [2024-06-20 17:07:48,487 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 129 selfloop transitions, 28 changer transitions 0/161 dead transitions. [2024-06-20 17:07:48,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 1642 flow [2024-06-20 17:07:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:07:48,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 17:07:48,489 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 947 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:07:48,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 1642 flow [2024-06-20 17:07:48,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1584 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:48,528 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1200 flow [2024-06-20 17:07:48,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1200, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-20 17:07:48,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 17:07:48,529 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1200 flow [2024-06-20 17:07:48,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:48,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:48,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:48,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:07:48,530 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:48,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash 58988788, now seen corresponding path program 2 times [2024-06-20 17:07:48,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:48,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022741142] [2024-06-20 17:07:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022741142] [2024-06-20 17:07:50,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022741142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:50,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:50,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293171841] [2024-06-20 17:07:50,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:50,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1200 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:50,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:50,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:51,933 INFO L124 PetriNetUnfolderBase]: 1724/2749 cut-off events. [2024-06-20 17:07:51,933 INFO L125 PetriNetUnfolderBase]: For 49861/49869 co-relation queries the response was YES. [2024-06-20 17:07:51,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13963 conditions, 2749 events. 1724/2749 cut-off events. For 49861/49869 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14321 event pairs, 517 based on Foata normal form. 10/2754 useless extension candidates. Maximal degree in co-relation 13904. Up to 2512 conditions per place. [2024-06-20 17:07:51,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 102 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-20 17:07:51,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 153 transitions, 1574 flow [2024-06-20 17:07:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:07:51,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:07:51,949 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1200 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:07:51,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 153 transitions, 1574 flow [2024-06-20 17:07:51,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 153 transitions, 1546 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-20 17:07:51,990 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1258 flow [2024-06-20 17:07:51,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-20 17:07:51,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 17:07:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1258 flow [2024-06-20 17:07:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:51,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:51,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:07:51,992 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1233834348, now seen corresponding path program 2 times [2024-06-20 17:07:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132361036] [2024-06-20 17:07:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132361036] [2024-06-20 17:07:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132361036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:54,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:54,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343029200] [2024-06-20 17:07:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:54,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:54,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:54,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:54,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1258 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:54,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:54,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:54,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:55,620 INFO L124 PetriNetUnfolderBase]: 1861/2911 cut-off events. [2024-06-20 17:07:55,620 INFO L125 PetriNetUnfolderBase]: For 54212/54212 co-relation queries the response was YES. [2024-06-20 17:07:55,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15029 conditions, 2911 events. 1861/2911 cut-off events. For 54212/54212 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15063 event pairs, 527 based on Foata normal form. 2/2913 useless extension candidates. Maximal degree in co-relation 14967. Up to 2779 conditions per place. [2024-06-20 17:07:55,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2024-06-20 17:07:55,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 166 transitions, 1829 flow [2024-06-20 17:07:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 17:07:55,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-20 17:07:55,640 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1258 flow. Second operand 9 states and 132 transitions. [2024-06-20 17:07:55,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 166 transitions, 1829 flow [2024-06-20 17:07:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 166 transitions, 1729 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:55,692 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1341 flow [2024-06-20 17:07:55,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-06-20 17:07:55,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 17:07:55,693 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1341 flow [2024-06-20 17:07:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:55,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:55,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:55,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:07:55,694 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:55,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash 402658938, now seen corresponding path program 3 times [2024-06-20 17:07:55,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:55,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403893918] [2024-06-20 17:07:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403893918] [2024-06-20 17:07:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403893918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:58,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:58,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315802076] [2024-06-20 17:07:58,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:58,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:07:58,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1341 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:58,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:58,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:07:58,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:59,164 INFO L124 PetriNetUnfolderBase]: 1855/2903 cut-off events. [2024-06-20 17:07:59,164 INFO L125 PetriNetUnfolderBase]: For 57438/57438 co-relation queries the response was YES. [2024-06-20 17:07:59,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15107 conditions, 2903 events. 1855/2903 cut-off events. For 57438/57438 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14947 event pairs, 534 based on Foata normal form. 2/2905 useless extension candidates. Maximal degree in co-relation 15042. Up to 2776 conditions per place. [2024-06-20 17:07:59,179 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 136 selfloop transitions, 24 changer transitions 0/164 dead transitions. [2024-06-20 17:07:59,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 164 transitions, 1755 flow [2024-06-20 17:07:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 17:07:59,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 17:07:59,181 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1341 flow. Second operand 8 states and 121 transitions. [2024-06-20 17:07:59,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 164 transitions, 1755 flow [2024-06-20 17:07:59,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 164 transitions, 1691 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:59,229 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1331 flow [2024-06-20 17:07:59,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2024-06-20 17:07:59,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-20 17:07:59,230 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1331 flow [2024-06-20 17:07:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:59,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:59,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:07:59,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:59,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1265101158, now seen corresponding path program 3 times [2024-06-20 17:07:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:59,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191162766] [2024-06-20 17:07:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191162766] [2024-06-20 17:08:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191162766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:08:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237883872] [2024-06-20 17:08:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:08:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:08:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:08:01,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:01,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1331 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2024-06-20 17:08:01,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:01,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:01,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:02,306 INFO L124 PetriNetUnfolderBase]: 1742/2764 cut-off events. [2024-06-20 17:08:02,306 INFO L125 PetriNetUnfolderBase]: For 59922/59924 co-relation queries the response was YES. [2024-06-20 17:08:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 2764 events. 1742/2764 cut-off events. For 59922/59924 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14432 event pairs, 542 based on Foata normal form. 6/2764 useless extension candidates. Maximal degree in co-relation 14318. Up to 2599 conditions per place. [2024-06-20 17:08:02,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 32 changer transitions 0/158 dead transitions. [2024-06-20 17:08:02,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 158 transitions, 1643 flow [2024-06-20 17:08:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:08:02,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:08:02,325 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1331 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:08:02,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 158 transitions, 1643 flow [2024-06-20 17:08:02,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 1595 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:02,366 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 1360 flow [2024-06-20 17:08:02,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2024-06-20 17:08:02,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 17:08:02,367 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 1360 flow [2024-06-20 17:08:02,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2024-06-20 17:08:02,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:02,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:02,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:08:02,368 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:02,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1265347422, now seen corresponding path program 1 times [2024-06-20 17:08:02,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:02,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105380295] [2024-06-20 17:08:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:02,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:05,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105380295] [2024-06-20 17:08:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105380295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:05,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925844234] [2024-06-20 17:08:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:05,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:05,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:05,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:05,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:05,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:06,760 INFO L124 PetriNetUnfolderBase]: 1832/2872 cut-off events. [2024-06-20 17:08:06,760 INFO L125 PetriNetUnfolderBase]: For 61192/61192 co-relation queries the response was YES. [2024-06-20 17:08:06,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14971 conditions, 2872 events. 1832/2872 cut-off events. For 61192/61192 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14819 event pairs, 522 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 14904. Up to 2799 conditions per place. [2024-06-20 17:08:06,778 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 144 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2024-06-20 17:08:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 161 transitions, 1722 flow [2024-06-20 17:08:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-20 17:08:06,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-20 17:08:06,780 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 1360 flow. Second operand 7 states and 102 transitions. [2024-06-20 17:08:06,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 161 transitions, 1722 flow [2024-06-20 17:08:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 161 transitions, 1658 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:06,831 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1347 flow [2024-06-20 17:08:06,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1347, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2024-06-20 17:08:06,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 17:08:06,832 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1347 flow [2024-06-20 17:08:06,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:06,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:06,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:06,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:08:06,832 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:06,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -636396337, now seen corresponding path program 1 times [2024-06-20 17:08:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:06,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971682939] [2024-06-20 17:08:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:09,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:09,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971682939] [2024-06-20 17:08:09,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971682939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:09,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:09,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919647452] [2024-06-20 17:08:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:09,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:09,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:09,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1347 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:09,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:09,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:09,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:10,479 INFO L124 PetriNetUnfolderBase]: 1852/2901 cut-off events. [2024-06-20 17:08:10,479 INFO L125 PetriNetUnfolderBase]: For 66584/66588 co-relation queries the response was YES. [2024-06-20 17:08:10,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15294 conditions, 2901 events. 1852/2901 cut-off events. For 66584/66588 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14896 event pairs, 526 based on Foata normal form. 8/2909 useless extension candidates. Maximal degree in co-relation 15226. Up to 2678 conditions per place. [2024-06-20 17:08:10,498 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 135 selfloop transitions, 38 changer transitions 0/177 dead transitions. [2024-06-20 17:08:10,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 177 transitions, 1868 flow [2024-06-20 17:08:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:08:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:08:10,500 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1347 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:08:10,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 177 transitions, 1868 flow [2024-06-20 17:08:10,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 177 transitions, 1833 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:10,565 INFO L231 Difference]: Finished difference. Result has 142 places, 153 transitions, 1477 flow [2024-06-20 17:08:10,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1477, PETRI_PLACES=142, PETRI_TRANSITIONS=153} [2024-06-20 17:08:10,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-20 17:08:10,566 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 153 transitions, 1477 flow [2024-06-20 17:08:10,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:10,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:10,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:08:10,566 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:10,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -298786767, now seen corresponding path program 2 times [2024-06-20 17:08:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:10,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676571211] [2024-06-20 17:08:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:10,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676571211] [2024-06-20 17:08:13,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676571211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:13,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:13,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:13,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242300561] [2024-06-20 17:08:13,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:13,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:13,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 153 transitions, 1477 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:13,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:13,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:13,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:14,775 INFO L124 PetriNetUnfolderBase]: 1872/2930 cut-off events. [2024-06-20 17:08:14,775 INFO L125 PetriNetUnfolderBase]: For 70869/70877 co-relation queries the response was YES. [2024-06-20 17:08:14,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 2930 events. 1872/2930 cut-off events. For 70869/70877 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15050 event pairs, 543 based on Foata normal form. 12/2942 useless extension candidates. Maximal degree in co-relation 15746. Up to 2694 conditions per place. [2024-06-20 17:08:14,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 136 selfloop transitions, 45 changer transitions 0/185 dead transitions. [2024-06-20 17:08:14,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 2076 flow [2024-06-20 17:08:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:08:14,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 17:08:14,794 INFO L175 Difference]: Start difference. First operand has 142 places, 153 transitions, 1477 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:08:14,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 2076 flow [2024-06-20 17:08:14,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 185 transitions, 1970 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:14,846 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 1533 flow [2024-06-20 17:08:14,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1533, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2024-06-20 17:08:14,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 17:08:14,847 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 1533 flow [2024-06-20 17:08:14,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:14,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:14,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:14,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:08:14,847 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:14,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -632671687, now seen corresponding path program 3 times [2024-06-20 17:08:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748930489] [2024-06-20 17:08:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:17,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:17,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748930489] [2024-06-20 17:08:17,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748930489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:17,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:17,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712701630] [2024-06-20 17:08:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:17,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:17,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:17,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 1533 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:17,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:17,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:19,423 INFO L124 PetriNetUnfolderBase]: 1860/2914 cut-off events. [2024-06-20 17:08:19,423 INFO L125 PetriNetUnfolderBase]: For 72965/72973 co-relation queries the response was YES. [2024-06-20 17:08:19,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15771 conditions, 2914 events. 1860/2914 cut-off events. For 72965/72973 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14949 event pairs, 541 based on Foata normal form. 12/2926 useless extension candidates. Maximal degree in co-relation 15699. Up to 2686 conditions per place. [2024-06-20 17:08:19,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 47 changer transitions 0/188 dead transitions. [2024-06-20 17:08:19,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 188 transitions, 2038 flow [2024-06-20 17:08:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:08:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:08:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-20 17:08:19,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-20 17:08:19,444 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 1533 flow. Second operand 10 states and 153 transitions. [2024-06-20 17:08:19,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 188 transitions, 2038 flow [2024-06-20 17:08:19,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 188 transitions, 1942 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:19,516 INFO L231 Difference]: Finished difference. Result has 152 places, 159 transitions, 1548 flow [2024-06-20 17:08:19,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1548, PETRI_PLACES=152, PETRI_TRANSITIONS=159} [2024-06-20 17:08:19,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 17:08:19,517 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 159 transitions, 1548 flow [2024-06-20 17:08:19,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:19,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:19,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:19,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:08:19,518 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:19,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:19,518 INFO L85 PathProgramCache]: Analyzing trace with hash -398688899, now seen corresponding path program 4 times [2024-06-20 17:08:19,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:19,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334550767] [2024-06-20 17:08:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334550767] [2024-06-20 17:08:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334550767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:21,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207620695] [2024-06-20 17:08:21,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:21,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:21,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:21,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 159 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:21,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:21,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:21,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:22,941 INFO L124 PetriNetUnfolderBase]: 1880/2940 cut-off events. [2024-06-20 17:08:22,941 INFO L125 PetriNetUnfolderBase]: For 77480/77480 co-relation queries the response was YES. [2024-06-20 17:08:22,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15987 conditions, 2940 events. 1880/2940 cut-off events. For 77480/77480 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15186 event pairs, 524 based on Foata normal form. 4/2944 useless extension candidates. Maximal degree in co-relation 15914. Up to 2806 conditions per place. [2024-06-20 17:08:22,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 28 changer transitions 0/183 dead transitions. [2024-06-20 17:08:22,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 183 transitions, 2056 flow [2024-06-20 17:08:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 17:08:22,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-20 17:08:22,962 INFO L175 Difference]: Start difference. First operand has 152 places, 159 transitions, 1548 flow. Second operand 9 states and 132 transitions. [2024-06-20 17:08:22,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 183 transitions, 2056 flow [2024-06-20 17:08:23,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 1968 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:23,033 INFO L231 Difference]: Finished difference. Result has 154 places, 162 transitions, 1563 flow [2024-06-20 17:08:23,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1563, PETRI_PLACES=154, PETRI_TRANSITIONS=162} [2024-06-20 17:08:23,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 17:08:23,034 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 162 transitions, 1563 flow [2024-06-20 17:08:23,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:23,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:23,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:08:23,035 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:23,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash 563432557, now seen corresponding path program 5 times [2024-06-20 17:08:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282825672] [2024-06-20 17:08:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:25,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:25,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282825672] [2024-06-20 17:08:25,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282825672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:25,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534080004] [2024-06-20 17:08:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:25,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:25,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 162 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:25,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:25,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:25,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:26,452 INFO L124 PetriNetUnfolderBase]: 1868/2924 cut-off events. [2024-06-20 17:08:26,453 INFO L125 PetriNetUnfolderBase]: For 79337/79337 co-relation queries the response was YES. [2024-06-20 17:08:26,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15831 conditions, 2924 events. 1868/2924 cut-off events. For 79337/79337 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15084 event pairs, 522 based on Foata normal form. 4/2928 useless extension candidates. Maximal degree in co-relation 15757. Up to 2798 conditions per place. [2024-06-20 17:08:26,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 27 changer transitions 0/181 dead transitions. [2024-06-20 17:08:26,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 181 transitions, 1959 flow [2024-06-20 17:08:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 17:08:26,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 17:08:26,474 INFO L175 Difference]: Start difference. First operand has 154 places, 162 transitions, 1563 flow. Second operand 8 states and 121 transitions. [2024-06-20 17:08:26,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 181 transitions, 1959 flow [2024-06-20 17:08:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 181 transitions, 1912 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:26,556 INFO L231 Difference]: Finished difference. Result has 156 places, 162 transitions, 1576 flow [2024-06-20 17:08:26,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1576, PETRI_PLACES=156, PETRI_TRANSITIONS=162} [2024-06-20 17:08:26,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 17:08:26,557 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 162 transitions, 1576 flow [2024-06-20 17:08:26,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:26,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:26,558 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] [2024-06-20 17:08:26,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:08:26,558 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:26,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash -994890161, now seen corresponding path program 1 times [2024-06-20 17:08:26,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:26,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155636998] [2024-06-20 17:08:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:26,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155636998] [2024-06-20 17:08:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155636998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782840219] [2024-06-20 17:08:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:29,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:29,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 162 transitions, 1576 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:29,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:29,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:29,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:30,830 INFO L124 PetriNetUnfolderBase]: 1876/2933 cut-off events. [2024-06-20 17:08:30,831 INFO L125 PetriNetUnfolderBase]: For 82895/82895 co-relation queries the response was YES. [2024-06-20 17:08:30,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16032 conditions, 2933 events. 1876/2933 cut-off events. For 82895/82895 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15047 event pairs, 436 based on Foata normal form. 2/2934 useless extension candidates. Maximal degree in co-relation 15957. Up to 2772 conditions per place. [2024-06-20 17:08:30,850 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 161 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-20 17:08:30,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 184 transitions, 2090 flow [2024-06-20 17:08:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:08:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:08:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 17:08:30,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:08:30,852 INFO L175 Difference]: Start difference. First operand has 156 places, 162 transitions, 1576 flow. Second operand 6 states and 99 transitions. [2024-06-20 17:08:30,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 184 transitions, 2090 flow [2024-06-20 17:08:30,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 184 transitions, 2015 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:08:30,931 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1592 flow [2024-06-20 17:08:30,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-20 17:08:30,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 17:08:30,932 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1592 flow [2024-06-20 17:08:30,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:30,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:30,933 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] [2024-06-20 17:08:30,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:08:30,933 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:30,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1477314419, now seen corresponding path program 2 times [2024-06-20 17:08:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:30,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532922002] [2024-06-20 17:08:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:34,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:34,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532922002] [2024-06-20 17:08:34,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532922002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:34,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:34,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938679433] [2024-06-20 17:08:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:34,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:34,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:34,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:34,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1592 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:34,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:34,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:34,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:35,437 INFO L124 PetriNetUnfolderBase]: 1871/2926 cut-off events. [2024-06-20 17:08:35,438 INFO L125 PetriNetUnfolderBase]: For 86022/86022 co-relation queries the response was YES. [2024-06-20 17:08:35,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16119 conditions, 2926 events. 1871/2926 cut-off events. For 86022/86022 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15091 event pairs, 551 based on Foata normal form. 2/2927 useless extension candidates. Maximal degree in co-relation 16043. Up to 2814 conditions per place. [2024-06-20 17:08:35,454 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 156 selfloop transitions, 18 changer transitions 0/178 dead transitions. [2024-06-20 17:08:35,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 1968 flow [2024-06-20 17:08:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:08:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:08:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-20 17:08:35,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:08:35,456 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1592 flow. Second operand 6 states and 94 transitions. [2024-06-20 17:08:35,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 1968 flow [2024-06-20 17:08:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 178 transitions, 1920 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 17:08:35,531 INFO L231 Difference]: Finished difference. Result has 158 places, 166 transitions, 1585 flow [2024-06-20 17:08:35,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1585, PETRI_PLACES=158, PETRI_TRANSITIONS=166} [2024-06-20 17:08:35,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-20 17:08:35,533 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 166 transitions, 1585 flow [2024-06-20 17:08:35,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:35,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:35,533 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] [2024-06-20 17:08:35,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:08:35,534 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:35,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 641328305, now seen corresponding path program 1 times [2024-06-20 17:08:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:35,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688872176] [2024-06-20 17:08:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688872176] [2024-06-20 17:08:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688872176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:38,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959313484] [2024-06-20 17:08:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:38,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 166 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:38,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:38,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:39,904 INFO L124 PetriNetUnfolderBase]: 1892/2955 cut-off events. [2024-06-20 17:08:39,905 INFO L125 PetriNetUnfolderBase]: For 91318/91318 co-relation queries the response was YES. [2024-06-20 17:08:39,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16480 conditions, 2955 events. 1892/2955 cut-off events. For 91318/91318 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15231 event pairs, 479 based on Foata normal form. 1/2955 useless extension candidates. Maximal degree in co-relation 16402. Up to 2639 conditions per place. [2024-06-20 17:08:39,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 63 changer transitions 0/194 dead transitions. [2024-06-20 17:08:39,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2165 flow [2024-06-20 17:08:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:08:39,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:08:39,930 INFO L175 Difference]: Start difference. First operand has 158 places, 166 transitions, 1585 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:08:39,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2165 flow [2024-06-20 17:08:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 194 transitions, 2124 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:40,020 INFO L231 Difference]: Finished difference. Result has 161 places, 172 transitions, 1802 flow [2024-06-20 17:08:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1802, PETRI_PLACES=161, PETRI_TRANSITIONS=172} [2024-06-20 17:08:40,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 17:08:40,031 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 172 transitions, 1802 flow [2024-06-20 17:08:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:40,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:40,031 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] [2024-06-20 17:08:40,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:08:40,031 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1615383753, now seen corresponding path program 2 times [2024-06-20 17:08:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:40,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203701374] [2024-06-20 17:08:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203701374] [2024-06-20 17:08:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203701374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:43,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:43,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997184407] [2024-06-20 17:08:43,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:43,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:43,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:43,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 172 transitions, 1802 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:43,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:43,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:43,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:44,411 INFO L124 PetriNetUnfolderBase]: 1897/2972 cut-off events. [2024-06-20 17:08:44,411 INFO L125 PetriNetUnfolderBase]: For 98734/98742 co-relation queries the response was YES. [2024-06-20 17:08:44,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17333 conditions, 2972 events. 1897/2972 cut-off events. For 98734/98742 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15388 event pairs, 544 based on Foata normal form. 9/2980 useless extension candidates. Maximal degree in co-relation 17253. Up to 2544 conditions per place. [2024-06-20 17:08:44,432 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 72 changer transitions 0/204 dead transitions. [2024-06-20 17:08:44,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 2540 flow [2024-06-20 17:08:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:08:44,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:08:44,434 INFO L175 Difference]: Start difference. First operand has 161 places, 172 transitions, 1802 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:08:44,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 2540 flow [2024-06-20 17:08:44,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 204 transitions, 2439 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:44,534 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 2052 flow [2024-06-20 17:08:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2052, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2024-06-20 17:08:44,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 17:08:44,534 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 2052 flow [2024-06-20 17:08:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:44,535 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] [2024-06-20 17:08:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:08:44,535 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:44,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1615682655, now seen corresponding path program 1 times [2024-06-20 17:08:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447039012] [2024-06-20 17:08:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:47,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:47,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447039012] [2024-06-20 17:08:47,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447039012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:47,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:47,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936890689] [2024-06-20 17:08:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:47,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:47,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:47,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 2052 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:47,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:47,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:47,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:48,643 INFO L124 PetriNetUnfolderBase]: 1955/3053 cut-off events. [2024-06-20 17:08:48,644 INFO L125 PetriNetUnfolderBase]: For 104692/104704 co-relation queries the response was YES. [2024-06-20 17:08:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18377 conditions, 3053 events. 1955/3053 cut-off events. For 104692/104704 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15767 event pairs, 516 based on Foata normal form. 14/3067 useless extension candidates. Maximal degree in co-relation 18295. Up to 2631 conditions per place. [2024-06-20 17:08:48,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 81 changer transitions 0/217 dead transitions. [2024-06-20 17:08:48,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 2798 flow [2024-06-20 17:08:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:08:48,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:08:48,668 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 2052 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:08:48,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 2798 flow [2024-06-20 17:08:48,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2703 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-20 17:08:48,765 INFO L231 Difference]: Finished difference. Result has 173 places, 192 transitions, 2293 flow [2024-06-20 17:08:48,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2293, PETRI_PLACES=173, PETRI_TRANSITIONS=192} [2024-06-20 17:08:48,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-20 17:08:48,766 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 192 transitions, 2293 flow [2024-06-20 17:08:48,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:48,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:48,766 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] [2024-06-20 17:08:48,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:08:48,767 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1161352635, now seen corresponding path program 3 times [2024-06-20 17:08:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023416455] [2024-06-20 17:08:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:51,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:51,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023416455] [2024-06-20 17:08:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023416455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:51,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091379961] [2024-06-20 17:08:51,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:51,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:51,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:51,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 192 transitions, 2293 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:51,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:51,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:51,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:53,043 INFO L124 PetriNetUnfolderBase]: 1960/3061 cut-off events. [2024-06-20 17:08:53,044 INFO L125 PetriNetUnfolderBase]: For 109100/109108 co-relation queries the response was YES. [2024-06-20 17:08:53,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18738 conditions, 3061 events. 1960/3061 cut-off events. For 109100/109108 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15878 event pairs, 552 based on Foata normal form. 9/3069 useless extension candidates. Maximal degree in co-relation 18652. Up to 2628 conditions per place. [2024-06-20 17:08:53,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 76 changer transitions 0/214 dead transitions. [2024-06-20 17:08:53,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 214 transitions, 2948 flow [2024-06-20 17:08:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:08:53,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:08:53,069 INFO L175 Difference]: Start difference. First operand has 173 places, 192 transitions, 2293 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:08:53,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 214 transitions, 2948 flow [2024-06-20 17:08:53,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 214 transitions, 2836 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:53,191 INFO L231 Difference]: Finished difference. Result has 175 places, 195 transitions, 2382 flow [2024-06-20 17:08:53,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2382, PETRI_PLACES=175, PETRI_TRANSITIONS=195} [2024-06-20 17:08:53,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 17:08:53,192 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 195 transitions, 2382 flow [2024-06-20 17:08:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:53,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:53,192 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] [2024-06-20 17:08:53,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:08:53,192 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:53,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1761540297, now seen corresponding path program 4 times [2024-06-20 17:08:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065531965] [2024-06-20 17:08:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065531965] [2024-06-20 17:08:56,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065531965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:56,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:56,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351266016] [2024-06-20 17:08:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:56,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 195 transitions, 2382 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:56,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:57,306 INFO L124 PetriNetUnfolderBase]: 1973/3075 cut-off events. [2024-06-20 17:08:57,307 INFO L125 PetriNetUnfolderBase]: For 109529/109529 co-relation queries the response was YES. [2024-06-20 17:08:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19022 conditions, 3075 events. 1973/3075 cut-off events. For 109529/109529 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15921 event pairs, 568 based on Foata normal form. 1/3075 useless extension candidates. Maximal degree in co-relation 18935. Up to 2912 conditions per place. [2024-06-20 17:08:57,326 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 37 changer transitions 0/213 dead transitions. [2024-06-20 17:08:57,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 213 transitions, 2959 flow [2024-06-20 17:08:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 17:08:57,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-20 17:08:57,328 INFO L175 Difference]: Start difference. First operand has 175 places, 195 transitions, 2382 flow. Second operand 8 states and 122 transitions. [2024-06-20 17:08:57,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 213 transitions, 2959 flow [2024-06-20 17:08:57,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 213 transitions, 2783 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:57,436 INFO L231 Difference]: Finished difference. Result has 180 places, 198 transitions, 2355 flow [2024-06-20 17:08:57,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2355, PETRI_PLACES=180, PETRI_TRANSITIONS=198} [2024-06-20 17:08:57,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 17:08:57,437 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 198 transitions, 2355 flow [2024-06-20 17:08:57,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:57,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:57,437 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] [2024-06-20 17:08:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:08:57,438 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:57,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1156710633, now seen corresponding path program 2 times [2024-06-20 17:08:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105956871] [2024-06-20 17:08:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105956871] [2024-06-20 17:08:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105956871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:59,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12885879] [2024-06-20 17:08:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:59,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:08:59,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 198 transitions, 2355 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:59,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:59,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:08:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:01,342 INFO L124 PetriNetUnfolderBase]: 2104/3252 cut-off events. [2024-06-20 17:09:01,342 INFO L125 PetriNetUnfolderBase]: For 126124/126124 co-relation queries the response was YES. [2024-06-20 17:09:01,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20510 conditions, 3252 events. 2104/3252 cut-off events. For 126124/126124 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16760 event pairs, 559 based on Foata normal form. 4/3255 useless extension candidates. Maximal degree in co-relation 20421. Up to 2941 conditions per place. [2024-06-20 17:09:01,365 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 69 changer transitions 0/244 dead transitions. [2024-06-20 17:09:01,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 3382 flow [2024-06-20 17:09:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:09:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:09:01,367 INFO L175 Difference]: Start difference. First operand has 180 places, 198 transitions, 2355 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:09:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 3382 flow [2024-06-20 17:09:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 244 transitions, 3283 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:01,510 INFO L231 Difference]: Finished difference. Result has 185 places, 221 transitions, 2805 flow [2024-06-20 17:09:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2805, PETRI_PLACES=185, PETRI_TRANSITIONS=221} [2024-06-20 17:09:01,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 17:09:01,511 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 221 transitions, 2805 flow [2024-06-20 17:09:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:01,511 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] [2024-06-20 17:09:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:09:01,511 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:01,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1793051325, now seen corresponding path program 3 times [2024-06-20 17:09:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146511749] [2024-06-20 17:09:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:03,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:03,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146511749] [2024-06-20 17:09:03,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146511749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:03,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:03,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208601703] [2024-06-20 17:09:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:03,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:03,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 221 transitions, 2805 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:03,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:03,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:03,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:05,309 INFO L124 PetriNetUnfolderBase]: 2092/3236 cut-off events. [2024-06-20 17:09:05,310 INFO L125 PetriNetUnfolderBase]: For 131245/131245 co-relation queries the response was YES. [2024-06-20 17:09:05,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21102 conditions, 3236 events. 2092/3236 cut-off events. For 131245/131245 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16664 event pairs, 562 based on Foata normal form. 4/3239 useless extension candidates. Maximal degree in co-relation 21010. Up to 2935 conditions per place. [2024-06-20 17:09:05,337 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 66 changer transitions 0/243 dead transitions. [2024-06-20 17:09:05,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 243 transitions, 3438 flow [2024-06-20 17:09:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:09:05,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:09:05,340 INFO L175 Difference]: Start difference. First operand has 185 places, 221 transitions, 2805 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:09:05,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 243 transitions, 3438 flow [2024-06-20 17:09:05,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 243 transitions, 3299 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:05,469 INFO L231 Difference]: Finished difference. Result has 190 places, 222 transitions, 2856 flow [2024-06-20 17:09:05,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2856, PETRI_PLACES=190, PETRI_TRANSITIONS=222} [2024-06-20 17:09:05,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 17:09:05,470 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 222 transitions, 2856 flow [2024-06-20 17:09:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:05,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:05,470 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] [2024-06-20 17:09:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:09:05,470 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:05,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1793060253, now seen corresponding path program 1 times [2024-06-20 17:09:05,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:05,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463457871] [2024-06-20 17:09:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463457871] [2024-06-20 17:09:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463457871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:08,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859045010] [2024-06-20 17:09:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:08,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:08,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 222 transitions, 2856 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:08,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:08,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:08,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:10,361 INFO L124 PetriNetUnfolderBase]: 2136/3308 cut-off events. [2024-06-20 17:09:10,362 INFO L125 PetriNetUnfolderBase]: For 138605/138605 co-relation queries the response was YES. [2024-06-20 17:09:10,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21582 conditions, 3308 events. 2136/3308 cut-off events. For 138605/138605 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17197 event pairs, 580 based on Foata normal form. 12/3319 useless extension candidates. Maximal degree in co-relation 21488. Up to 3114 conditions per place. [2024-06-20 17:09:10,389 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 212 selfloop transitions, 27 changer transitions 0/243 dead transitions. [2024-06-20 17:09:10,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 243 transitions, 3433 flow [2024-06-20 17:09:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:09:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:09:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:09:10,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-20 17:09:10,390 INFO L175 Difference]: Start difference. First operand has 190 places, 222 transitions, 2856 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:09:10,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 243 transitions, 3433 flow [2024-06-20 17:09:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 243 transitions, 3338 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:10,527 INFO L231 Difference]: Finished difference. Result has 191 places, 223 transitions, 2842 flow [2024-06-20 17:09:10,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2842, PETRI_PLACES=191, PETRI_TRANSITIONS=223} [2024-06-20 17:09:10,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 17:09:10,527 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 223 transitions, 2842 flow [2024-06-20 17:09:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:10,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:10,528 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] [2024-06-20 17:09:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:09:10,528 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)] === [2024-06-20 17:09:10,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1862008415, now seen corresponding path program 4 times [2024-06-20 17:09:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180290543] [2024-06-20 17:09:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180290543] [2024-06-20 17:09:13,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180290543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:13,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:13,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:13,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088262834] [2024-06-20 17:09:13,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:13,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:13,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:13,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:13,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:13,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:13,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 223 transitions, 2842 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:13,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:13,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:14,589 INFO L124 PetriNetUnfolderBase]: 2146/3331 cut-off events. [2024-06-20 17:09:14,589 INFO L125 PetriNetUnfolderBase]: For 131838/131850 co-relation queries the response was YES. [2024-06-20 17:09:14,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 3331 events. 2146/3331 cut-off events. For 131838/131850 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17380 event pairs, 612 based on Foata normal form. 14/3345 useless extension candidates. Maximal degree in co-relation 21529. Up to 2749 conditions per place. [2024-06-20 17:09:14,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 87 changer transitions 0/258 dead transitions. [2024-06-20 17:09:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 258 transitions, 3700 flow [2024-06-20 17:09:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:09:14,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:09:14,618 INFO L175 Difference]: Start difference. First operand has 191 places, 223 transitions, 2842 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:09:14,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 258 transitions, 3700 flow [2024-06-20 17:09:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 258 transitions, 3649 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:14,764 INFO L231 Difference]: Finished difference. Result has 195 places, 234 transitions, 3181 flow [2024-06-20 17:09:14,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3181, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2024-06-20 17:09:14,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 17:09:14,765 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 3181 flow [2024-06-20 17:09:14,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:14,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:14,766 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] [2024-06-20 17:09:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:09:14,766 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:14,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash 525540251, now seen corresponding path program 5 times [2024-06-20 17:09:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760041695] [2024-06-20 17:09:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760041695] [2024-06-20 17:09:17,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760041695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:17,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:17,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940862144] [2024-06-20 17:09:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:17,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:17,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 3181 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:18,829 INFO L124 PetriNetUnfolderBase]: 2284/3510 cut-off events. [2024-06-20 17:09:18,829 INFO L125 PetriNetUnfolderBase]: For 153948/153948 co-relation queries the response was YES. [2024-06-20 17:09:18,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24335 conditions, 3510 events. 2284/3510 cut-off events. For 153948/153948 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18187 event pairs, 592 based on Foata normal form. 2/3511 useless extension candidates. Maximal degree in co-relation 24239. Up to 3020 conditions per place. [2024-06-20 17:09:18,856 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 92 changer transitions 0/277 dead transitions. [2024-06-20 17:09:18,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 277 transitions, 4257 flow [2024-06-20 17:09:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:09:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:09:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 17:09:18,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-20 17:09:18,858 INFO L175 Difference]: Start difference. First operand has 195 places, 234 transitions, 3181 flow. Second operand 10 states and 156 transitions. [2024-06-20 17:09:18,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 277 transitions, 4257 flow [2024-06-20 17:09:19,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 277 transitions, 4198 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:19,037 INFO L231 Difference]: Finished difference. Result has 204 places, 252 transitions, 3687 flow [2024-06-20 17:09:19,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3687, PETRI_PLACES=204, PETRI_TRANSITIONS=252} [2024-06-20 17:09:19,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 17:09:19,038 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 252 transitions, 3687 flow [2024-06-20 17:09:19,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:19,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:19,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:19,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:09:19,039 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:19,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 286291585, now seen corresponding path program 6 times [2024-06-20 17:09:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:19,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532216804] [2024-06-20 17:09:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:19,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532216804] [2024-06-20 17:09:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532216804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:22,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:22,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:22,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490970992] [2024-06-20 17:09:22,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:22,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:22,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:22,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 252 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:22,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:22,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:22,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:23,597 INFO L124 PetriNetUnfolderBase]: 2278/3502 cut-off events. [2024-06-20 17:09:23,597 INFO L125 PetriNetUnfolderBase]: For 163209/163209 co-relation queries the response was YES. [2024-06-20 17:09:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25307 conditions, 3502 events. 2278/3502 cut-off events. For 163209/163209 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18211 event pairs, 629 based on Foata normal form. 2/3503 useless extension candidates. Maximal degree in co-relation 25206. Up to 3344 conditions per place. [2024-06-20 17:09:23,627 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 42 changer transitions 0/268 dead transitions. [2024-06-20 17:09:23,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 268 transitions, 4251 flow [2024-06-20 17:09:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-20 17:09:23,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-20 17:09:23,629 INFO L175 Difference]: Start difference. First operand has 204 places, 252 transitions, 3687 flow. Second operand 9 states and 133 transitions. [2024-06-20 17:09:23,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 268 transitions, 4251 flow [2024-06-20 17:09:23,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 268 transitions, 4097 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:23,821 INFO L231 Difference]: Finished difference. Result has 208 places, 252 transitions, 3623 flow [2024-06-20 17:09:23,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3623, PETRI_PLACES=208, PETRI_TRANSITIONS=252} [2024-06-20 17:09:23,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-20 17:09:23,822 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 252 transitions, 3623 flow [2024-06-20 17:09:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:23,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:23,822 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] [2024-06-20 17:09:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:09:23,822 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:23,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash 630430487, now seen corresponding path program 7 times [2024-06-20 17:09:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:23,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297731288] [2024-06-20 17:09:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:26,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297731288] [2024-06-20 17:09:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297731288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:26,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:26,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109584977] [2024-06-20 17:09:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:26,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:26,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 252 transitions, 3623 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:26,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:26,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:26,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:28,443 INFO L124 PetriNetUnfolderBase]: 2266/3484 cut-off events. [2024-06-20 17:09:28,443 INFO L125 PetriNetUnfolderBase]: For 166334/166334 co-relation queries the response was YES. [2024-06-20 17:09:28,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25035 conditions, 3484 events. 2266/3484 cut-off events. For 166334/166334 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18023 event pairs, 568 based on Foata normal form. 4/3487 useless extension candidates. Maximal degree in co-relation 24932. Up to 3011 conditions per place. [2024-06-20 17:09:28,474 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 92 changer transitions 0/280 dead transitions. [2024-06-20 17:09:28,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 4432 flow [2024-06-20 17:09:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:09:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:09:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-20 17:09:28,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-20 17:09:28,476 INFO L175 Difference]: Start difference. First operand has 208 places, 252 transitions, 3623 flow. Second operand 11 states and 171 transitions. [2024-06-20 17:09:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 4432 flow [2024-06-20 17:09:28,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 280 transitions, 4226 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-20 17:09:28,712 INFO L231 Difference]: Finished difference. Result has 210 places, 252 transitions, 3611 flow [2024-06-20 17:09:28,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3611, PETRI_PLACES=210, PETRI_TRANSITIONS=252} [2024-06-20 17:09:28,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 17:09:28,713 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 252 transitions, 3611 flow [2024-06-20 17:09:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:28,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:28,713 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] [2024-06-20 17:09:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:09:28,713 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:28,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash 408243257, now seen corresponding path program 8 times [2024-06-20 17:09:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774248332] [2024-06-20 17:09:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:31,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:31,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774248332] [2024-06-20 17:09:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774248332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:31,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107589247] [2024-06-20 17:09:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:31,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 252 transitions, 3611 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:31,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:32,878 INFO L124 PetriNetUnfolderBase]: 2260/3478 cut-off events. [2024-06-20 17:09:32,878 INFO L125 PetriNetUnfolderBase]: For 170027/170027 co-relation queries the response was YES. [2024-06-20 17:09:32,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25133 conditions, 3478 events. 2260/3478 cut-off events. For 170027/170027 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18008 event pairs, 580 based on Foata normal form. 2/3479 useless extension candidates. Maximal degree in co-relation 25030. Up to 3008 conditions per place. [2024-06-20 17:09:32,903 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 177 selfloop transitions, 94 changer transitions 0/275 dead transitions. [2024-06-20 17:09:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 275 transitions, 4316 flow [2024-06-20 17:09:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:09:32,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:09:32,905 INFO L175 Difference]: Start difference. First operand has 210 places, 252 transitions, 3611 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:09:32,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 275 transitions, 4316 flow [2024-06-20 17:09:33,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 275 transitions, 4118 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 17:09:33,144 INFO L231 Difference]: Finished difference. Result has 211 places, 252 transitions, 3607 flow [2024-06-20 17:09:33,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3607, PETRI_PLACES=211, PETRI_TRANSITIONS=252} [2024-06-20 17:09:33,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-20 17:09:33,145 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 252 transitions, 3607 flow [2024-06-20 17:09:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:33,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:33,145 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] [2024-06-20 17:09:33,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:09:33,146 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:33,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash 644248985, now seen corresponding path program 2 times [2024-06-20 17:09:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687686029] [2024-06-20 17:09:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:36,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:36,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687686029] [2024-06-20 17:09:36,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687686029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:36,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:36,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681423992] [2024-06-20 17:09:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:36,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:36,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 252 transitions, 3607 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:36,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:36,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:36,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:38,136 INFO L124 PetriNetUnfolderBase]: 2304/3548 cut-off events. [2024-06-20 17:09:38,136 INFO L125 PetriNetUnfolderBase]: For 188329/188329 co-relation queries the response was YES. [2024-06-20 17:09:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25646 conditions, 3548 events. 2304/3548 cut-off events. For 188329/188329 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18531 event pairs, 588 based on Foata normal form. 12/3559 useless extension candidates. Maximal degree in co-relation 25542. Up to 3344 conditions per place. [2024-06-20 17:09:38,162 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 30 changer transitions 0/276 dead transitions. [2024-06-20 17:09:38,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 276 transitions, 4284 flow [2024-06-20 17:09:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:09:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 17:09:38,164 INFO L175 Difference]: Start difference. First operand has 211 places, 252 transitions, 3607 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:09:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 276 transitions, 4284 flow [2024-06-20 17:09:38,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 276 transitions, 4121 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:38,396 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 3530 flow [2024-06-20 17:09:38,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3530, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-20 17:09:38,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 17:09:38,397 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 3530 flow [2024-06-20 17:09:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:38,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:38,398 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] [2024-06-20 17:09:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:09:38,398 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:38,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 523188253, now seen corresponding path program 3 times [2024-06-20 17:09:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255578772] [2024-06-20 17:09:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255578772] [2024-06-20 17:09:42,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255578772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:42,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:42,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26557769] [2024-06-20 17:09:42,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:42,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:42,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:09:42,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 3530 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:42,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:42,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:09:42,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:44,040 INFO L124 PetriNetUnfolderBase]: 2306/3558 cut-off events. [2024-06-20 17:09:44,041 INFO L125 PetriNetUnfolderBase]: For 186997/186997 co-relation queries the response was YES. [2024-06-20 17:09:44,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25471 conditions, 3558 events. 2306/3558 cut-off events. For 186997/186997 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18614 event pairs, 600 based on Foata normal form. 8/3565 useless extension candidates. Maximal degree in co-relation 25366. Up to 3260 conditions per place. [2024-06-20 17:09:44,073 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 33 changer transitions 0/280 dead transitions. [2024-06-20 17:09:44,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 4249 flow [2024-06-20 17:09:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:09:44,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:09:44,079 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 3530 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:09:44,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 4249 flow [2024-06-20 17:09:44,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 4169 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:44,300 INFO L231 Difference]: Finished difference. Result has 215 places, 254 transitions, 3542 flow [2024-06-20 17:09:44,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3542, PETRI_PLACES=215, PETRI_TRANSITIONS=254} [2024-06-20 17:09:44,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 17:09:44,300 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 254 transitions, 3542 flow [2024-06-20 17:09:44,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:44,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:44,301 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] [2024-06-20 17:09:44,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:09:44,301 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:44,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 187825085, now seen corresponding path program 1 times [2024-06-20 17:09:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46999908] [2024-06-20 17:09:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46999908] [2024-06-20 17:09:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46999908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:47,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:47,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:09:47,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410193001] [2024-06-20 17:09:47,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:47,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:09:47,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:09:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:09:47,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:47,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 254 transitions, 3542 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-20 17:09:47,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:47,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:47,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:48,622 INFO L124 PetriNetUnfolderBase]: 2229/3475 cut-off events. [2024-06-20 17:09:48,623 INFO L125 PetriNetUnfolderBase]: For 195530/195565 co-relation queries the response was YES. [2024-06-20 17:09:48,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 3475 events. 2229/3475 cut-off events. For 195530/195565 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18556 event pairs, 504 based on Foata normal form. 22/3462 useless extension candidates. Maximal degree in co-relation 25125. Up to 3101 conditions per place. [2024-06-20 17:09:48,653 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 209 selfloop transitions, 49 changer transitions 0/282 dead transitions. [2024-06-20 17:09:48,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 282 transitions, 4252 flow [2024-06-20 17:09:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:09:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:09:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:09:48,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:09:48,655 INFO L175 Difference]: Start difference. First operand has 215 places, 254 transitions, 3542 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:09:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 282 transitions, 4252 flow [2024-06-20 17:09:48,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 4178 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:48,876 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3619 flow [2024-06-20 17:09:48,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3619, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-20 17:09:48,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 17:09:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3619 flow [2024-06-20 17:09:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-20 17:09:48,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:48,877 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] [2024-06-20 17:09:48,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:09:48,877 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:48,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -756590775, now seen corresponding path program 2 times [2024-06-20 17:09:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378534192] [2024-06-20 17:09:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:52,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378534192] [2024-06-20 17:09:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378534192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:52,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:52,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:09:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246471621] [2024-06-20 17:09:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:09:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:09:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:09:52,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:52,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3619 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-20 17:09:52,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:52,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:52,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:53,322 INFO L124 PetriNetUnfolderBase]: 2243/3493 cut-off events. [2024-06-20 17:09:53,323 INFO L125 PetriNetUnfolderBase]: For 203483/203518 co-relation queries the response was YES. [2024-06-20 17:09:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25547 conditions, 3493 events. 2243/3493 cut-off events. For 203483/203518 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18588 event pairs, 544 based on Foata normal form. 22/3480 useless extension candidates. Maximal degree in co-relation 25440. Up to 3197 conditions per place. [2024-06-20 17:09:53,351 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 208 selfloop transitions, 47 changer transitions 0/279 dead transitions. [2024-06-20 17:09:53,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 279 transitions, 4199 flow [2024-06-20 17:09:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:09:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:09:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:09:53,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 17:09:53,357 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3619 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:09:53,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 279 transitions, 4199 flow [2024-06-20 17:09:53,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 279 transitions, 4102 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:53,585 INFO L231 Difference]: Finished difference. Result has 220 places, 260 transitions, 3652 flow [2024-06-20 17:09:53,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3652, PETRI_PLACES=220, PETRI_TRANSITIONS=260} [2024-06-20 17:09:53,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-20 17:09:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 260 transitions, 3652 flow [2024-06-20 17:09:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2024-06-20 17:09:53,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:53,601 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] [2024-06-20 17:09:53,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:09:53,601 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:53,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash -672457791, now seen corresponding path program 3 times [2024-06-20 17:09:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524832051] [2024-06-20 17:09:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524832051] [2024-06-20 17:09:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524832051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806155750] [2024-06-20 17:09:57,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:57,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:57,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 260 transitions, 3652 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:57,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:57,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:57,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:58,438 INFO L124 PetriNetUnfolderBase]: 2254/3512 cut-off events. [2024-06-20 17:09:58,438 INFO L125 PetriNetUnfolderBase]: For 209627/209649 co-relation queries the response was YES. [2024-06-20 17:09:58,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25774 conditions, 3512 events. 2254/3512 cut-off events. For 209627/209649 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18691 event pairs, 566 based on Foata normal form. 12/3489 useless extension candidates. Maximal degree in co-relation 25665. Up to 3217 conditions per place. [2024-06-20 17:09:58,468 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 51 changer transitions 0/282 dead transitions. [2024-06-20 17:09:58,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 282 transitions, 4230 flow [2024-06-20 17:09:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:09:58,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:09:58,470 INFO L175 Difference]: Start difference. First operand has 220 places, 260 transitions, 3652 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:09:58,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 282 transitions, 4230 flow [2024-06-20 17:09:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 282 transitions, 4136 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:58,760 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3686 flow [2024-06-20 17:09:58,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3686, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2024-06-20 17:09:58,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-20 17:09:58,761 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3686 flow [2024-06-20 17:09:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:58,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:58,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:58,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:09:58,762 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:58,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash 306157913, now seen corresponding path program 1 times [2024-06-20 17:09:58,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:58,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482079137] [2024-06-20 17:09:58,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:58,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:02,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482079137] [2024-06-20 17:10:02,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482079137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:02,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:02,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247596704] [2024-06-20 17:10:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:02,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3686 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:02,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:02,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:02,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:03,817 INFO L124 PetriNetUnfolderBase]: 2362/3637 cut-off events. [2024-06-20 17:10:03,818 INFO L125 PetriNetUnfolderBase]: For 210394/210402 co-relation queries the response was YES. [2024-06-20 17:10:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26511 conditions, 3637 events. 2362/3637 cut-off events. For 210394/210402 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19103 event pairs, 599 based on Foata normal form. 10/3647 useless extension candidates. Maximal degree in co-relation 26401. Up to 3397 conditions per place. [2024-06-20 17:10:03,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 51 changer transitions 0/286 dead transitions. [2024-06-20 17:10:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 4336 flow [2024-06-20 17:10:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:10:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 17:10:03,850 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3686 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:10:03,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 4336 flow [2024-06-20 17:10:04,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 286 transitions, 4260 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:04,107 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 3757 flow [2024-06-20 17:10:04,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3757, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-20 17:10:04,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 17:10:04,108 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 3757 flow [2024-06-20 17:10:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:04,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:04,108 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] [2024-06-20 17:10:04,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:10:04,108 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:04,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:04,109 INFO L85 PathProgramCache]: Analyzing trace with hash -497866337, now seen corresponding path program 4 times [2024-06-20 17:10:04,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:04,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139186291] [2024-06-20 17:10:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:04,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:07,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139186291] [2024-06-20 17:10:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139186291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:07,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:07,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:07,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144474710] [2024-06-20 17:10:07,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:07,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:07,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:07,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:07,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:07,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 3757 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:07,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:07,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:07,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:08,423 INFO L124 PetriNetUnfolderBase]: 2280/3539 cut-off events. [2024-06-20 17:10:08,423 INFO L125 PetriNetUnfolderBase]: For 233835/233855 co-relation queries the response was YES. [2024-06-20 17:10:08,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3539 events. 2280/3539 cut-off events. For 233835/233855 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18896 event pairs, 601 based on Foata normal form. 14/3506 useless extension candidates. Maximal degree in co-relation 26038. Up to 3276 conditions per place. [2024-06-20 17:10:08,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 41 changer transitions 0/284 dead transitions. [2024-06-20 17:10:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 284 transitions, 4357 flow [2024-06-20 17:10:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:10:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:10:08,452 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 3757 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:10:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 284 transitions, 4357 flow [2024-06-20 17:10:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 284 transitions, 4228 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:08,766 INFO L231 Difference]: Finished difference. Result has 229 places, 265 transitions, 3734 flow [2024-06-20 17:10:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3734, PETRI_PLACES=229, PETRI_TRANSITIONS=265} [2024-06-20 17:10:08,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 17:10:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 265 transitions, 3734 flow [2024-06-20 17:10:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:08,767 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] [2024-06-20 17:10:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:10:08,767 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:08,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -487857653, now seen corresponding path program 2 times [2024-06-20 17:10:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647141031] [2024-06-20 17:10:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647141031] [2024-06-20 17:10:12,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647141031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:12,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:12,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892603221] [2024-06-20 17:10:12,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:12,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:12,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:12,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:12,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 265 transitions, 3734 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:12,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:12,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:12,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:13,520 INFO L124 PetriNetUnfolderBase]: 2396/3699 cut-off events. [2024-06-20 17:10:13,521 INFO L125 PetriNetUnfolderBase]: For 221608/221608 co-relation queries the response was YES. [2024-06-20 17:10:13,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27008 conditions, 3699 events. 2396/3699 cut-off events. For 221608/221608 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19629 event pairs, 596 based on Foata normal form. 2/3701 useless extension candidates. Maximal degree in co-relation 26895. Up to 3555 conditions per place. [2024-06-20 17:10:13,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 29 changer transitions 0/288 dead transitions. [2024-06-20 17:10:13,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 288 transitions, 4388 flow [2024-06-20 17:10:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-20 17:10:13,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-06-20 17:10:13,549 INFO L175 Difference]: Start difference. First operand has 229 places, 265 transitions, 3734 flow. Second operand 10 states and 141 transitions. [2024-06-20 17:10:13,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 288 transitions, 4388 flow [2024-06-20 17:10:13,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 288 transitions, 4300 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:13,830 INFO L231 Difference]: Finished difference. Result has 233 places, 267 transitions, 3753 flow [2024-06-20 17:10:13,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3753, PETRI_PLACES=233, PETRI_TRANSITIONS=267} [2024-06-20 17:10:13,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 17:10:13,830 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 267 transitions, 3753 flow [2024-06-20 17:10:13,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:13,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:13,831 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] [2024-06-20 17:10:13,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:10:13,831 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:13,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -494113763, now seen corresponding path program 3 times [2024-06-20 17:10:13,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:13,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177895838] [2024-06-20 17:10:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:17,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:17,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177895838] [2024-06-20 17:10:17,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177895838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:17,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:17,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464370828] [2024-06-20 17:10:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:17,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:17,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 267 transitions, 3753 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:18,691 INFO L124 PetriNetUnfolderBase]: 2404/3711 cut-off events. [2024-06-20 17:10:18,691 INFO L125 PetriNetUnfolderBase]: For 229886/229886 co-relation queries the response was YES. [2024-06-20 17:10:18,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27297 conditions, 3711 events. 2404/3711 cut-off events. For 229886/229886 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19720 event pairs, 594 based on Foata normal form. 2/3713 useless extension candidates. Maximal degree in co-relation 27183. Up to 3567 conditions per place. [2024-06-20 17:10:18,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 29 changer transitions 0/289 dead transitions. [2024-06-20 17:10:18,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 289 transitions, 4411 flow [2024-06-20 17:10:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-20 17:10:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-20 17:10:18,726 INFO L175 Difference]: Start difference. First operand has 233 places, 267 transitions, 3753 flow. Second operand 9 states and 131 transitions. [2024-06-20 17:10:18,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 289 transitions, 4411 flow [2024-06-20 17:10:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 289 transitions, 4320 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 17:10:19,014 INFO L231 Difference]: Finished difference. Result has 234 places, 269 transitions, 3773 flow [2024-06-20 17:10:19,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3773, PETRI_PLACES=234, PETRI_TRANSITIONS=269} [2024-06-20 17:10:19,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-20 17:10:19,014 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 269 transitions, 3773 flow [2024-06-20 17:10:19,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:19,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:19,015 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] [2024-06-20 17:10:19,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:10:19,015 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:19,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 523194205, now seen corresponding path program 4 times [2024-06-20 17:10:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512915313] [2024-06-20 17:10:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:22,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512915313] [2024-06-20 17:10:22,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512915313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:22,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:22,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:22,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849090451] [2024-06-20 17:10:22,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:22,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:22,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:22,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 269 transitions, 3773 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:22,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:22,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:22,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:24,082 INFO L124 PetriNetUnfolderBase]: 2471/3812 cut-off events. [2024-06-20 17:10:24,082 INFO L125 PetriNetUnfolderBase]: For 252800/252800 co-relation queries the response was YES. [2024-06-20 17:10:24,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 3812 events. 2471/3812 cut-off events. For 252800/252800 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20259 event pairs, 593 based on Foata normal form. 2/3814 useless extension candidates. Maximal degree in co-relation 28343. Up to 3548 conditions per place. [2024-06-20 17:10:24,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 33 changer transitions 0/299 dead transitions. [2024-06-20 17:10:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 4615 flow [2024-06-20 17:10:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-20 17:10:24,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-20 17:10:24,116 INFO L175 Difference]: Start difference. First operand has 234 places, 269 transitions, 3773 flow. Second operand 10 states and 147 transitions. [2024-06-20 17:10:24,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 4615 flow [2024-06-20 17:10:24,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 299 transitions, 4532 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:24,419 INFO L231 Difference]: Finished difference. Result has 239 places, 272 transitions, 3825 flow [2024-06-20 17:10:24,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3825, PETRI_PLACES=239, PETRI_TRANSITIONS=272} [2024-06-20 17:10:24,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 17:10:24,419 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 272 transitions, 3825 flow [2024-06-20 17:10:24,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:24,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:24,420 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] [2024-06-20 17:10:24,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:10:24,420 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:24,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1931740794, now seen corresponding path program 1 times [2024-06-20 17:10:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179742170] [2024-06-20 17:10:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179742170] [2024-06-20 17:10:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179742170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555206062] [2024-06-20 17:10:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:27,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:27,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:27,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:27,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 272 transitions, 3825 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:27,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:27,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:29,222 INFO L124 PetriNetUnfolderBase]: 2499/3853 cut-off events. [2024-06-20 17:10:29,222 INFO L125 PetriNetUnfolderBase]: For 271674/271674 co-relation queries the response was YES. [2024-06-20 17:10:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28981 conditions, 3853 events. 2499/3853 cut-off events. For 271674/271674 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20420 event pairs, 523 based on Foata normal form. 8/3860 useless extension candidates. Maximal degree in co-relation 28864. Up to 3521 conditions per place. [2024-06-20 17:10:29,260 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 31 changer transitions 0/304 dead transitions. [2024-06-20 17:10:29,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 304 transitions, 4693 flow [2024-06-20 17:10:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:10:29,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:10:29,262 INFO L175 Difference]: Start difference. First operand has 239 places, 272 transitions, 3825 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:10:29,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 304 transitions, 4693 flow [2024-06-20 17:10:29,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 304 transitions, 4622 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:29,741 INFO L231 Difference]: Finished difference. Result has 242 places, 273 transitions, 3842 flow [2024-06-20 17:10:29,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3842, PETRI_PLACES=242, PETRI_TRANSITIONS=273} [2024-06-20 17:10:29,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 17:10:29,743 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 273 transitions, 3842 flow [2024-06-20 17:10:29,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:29,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:29,743 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] [2024-06-20 17:10:29,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:10:29,743 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:29,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1447890944, now seen corresponding path program 2 times [2024-06-20 17:10:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:29,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105660109] [2024-06-20 17:10:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:29,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:33,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:33,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105660109] [2024-06-20 17:10:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105660109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:33,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873181775] [2024-06-20 17:10:33,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:33,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:33,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:33,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:33,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 273 transitions, 3842 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:33,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:33,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:33,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:35,115 INFO L124 PetriNetUnfolderBase]: 2481/3827 cut-off events. [2024-06-20 17:10:35,115 INFO L125 PetriNetUnfolderBase]: For 266788/266788 co-relation queries the response was YES. [2024-06-20 17:10:35,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3827 events. 2481/3827 cut-off events. For 266788/266788 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20289 event pairs, 597 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 28496. Up to 3591 conditions per place. [2024-06-20 17:10:35,150 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 30 changer transitions 0/298 dead transitions. [2024-06-20 17:10:35,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 298 transitions, 4552 flow [2024-06-20 17:10:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:10:35,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 17:10:35,152 INFO L175 Difference]: Start difference. First operand has 242 places, 273 transitions, 3842 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:10:35,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 298 transitions, 4552 flow [2024-06-20 17:10:35,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 298 transitions, 4485 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:35,553 INFO L231 Difference]: Finished difference. Result has 245 places, 273 transitions, 3839 flow [2024-06-20 17:10:35,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3775, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3839, PETRI_PLACES=245, PETRI_TRANSITIONS=273} [2024-06-20 17:10:35,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:10:35,554 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 273 transitions, 3839 flow [2024-06-20 17:10:35,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:35,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:35,554 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] [2024-06-20 17:10:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:10:35,555 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:35,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1648172024, now seen corresponding path program 1 times [2024-06-20 17:10:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:35,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450006424] [2024-06-20 17:10:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:38,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450006424] [2024-06-20 17:10:38,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450006424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:38,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:38,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503647768] [2024-06-20 17:10:38,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:38,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:38,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 273 transitions, 3839 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:38,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:38,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:38,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:40,246 INFO L124 PetriNetUnfolderBase]: 2491/3841 cut-off events. [2024-06-20 17:10:40,246 INFO L125 PetriNetUnfolderBase]: For 265059/265059 co-relation queries the response was YES. [2024-06-20 17:10:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28724 conditions, 3841 events. 2491/3841 cut-off events. For 265059/265059 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20319 event pairs, 554 based on Foata normal form. 2/3842 useless extension candidates. Maximal degree in co-relation 28604. Up to 3502 conditions per place. [2024-06-20 17:10:40,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 72 changer transitions 0/299 dead transitions. [2024-06-20 17:10:40,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 299 transitions, 4647 flow [2024-06-20 17:10:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:10:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:10:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:10:40,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:10:40,284 INFO L175 Difference]: Start difference. First operand has 245 places, 273 transitions, 3839 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:10:40,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 299 transitions, 4647 flow [2024-06-20 17:10:40,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 299 transitions, 4564 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:40,836 INFO L231 Difference]: Finished difference. Result has 245 places, 276 transitions, 3963 flow [2024-06-20 17:10:40,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3963, PETRI_PLACES=245, PETRI_TRANSITIONS=276} [2024-06-20 17:10:40,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:10:40,836 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 276 transitions, 3963 flow [2024-06-20 17:10:40,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:40,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:40,837 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] [2024-06-20 17:10:40,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:10:40,837 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:40,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash -75724324, now seen corresponding path program 1 times [2024-06-20 17:10:40,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:40,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787253973] [2024-06-20 17:10:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:40,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787253973] [2024-06-20 17:10:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787253973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:43,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997998146] [2024-06-20 17:10:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:43,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:43,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 276 transitions, 3963 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:45,776 INFO L124 PetriNetUnfolderBase]: 2639/4049 cut-off events. [2024-06-20 17:10:45,776 INFO L125 PetriNetUnfolderBase]: For 290437/290437 co-relation queries the response was YES. [2024-06-20 17:10:45,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31038 conditions, 4049 events. 2639/4049 cut-off events. For 290437/290437 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21441 event pairs, 529 based on Foata normal form. 2/4050 useless extension candidates. Maximal degree in co-relation 30917. Up to 3455 conditions per place. [2024-06-20 17:10:45,815 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 205 selfloop transitions, 123 changer transitions 0/332 dead transitions. [2024-06-20 17:10:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 332 transitions, 5325 flow [2024-06-20 17:10:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:10:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:10:45,817 INFO L175 Difference]: Start difference. First operand has 245 places, 276 transitions, 3963 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:10:45,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 332 transitions, 5325 flow [2024-06-20 17:10:46,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 5126 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:46,337 INFO L231 Difference]: Finished difference. Result has 251 places, 300 transitions, 4651 flow [2024-06-20 17:10:46,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4651, PETRI_PLACES=251, PETRI_TRANSITIONS=300} [2024-06-20 17:10:46,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-20 17:10:46,338 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 300 transitions, 4651 flow [2024-06-20 17:10:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:46,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:46,338 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] [2024-06-20 17:10:46,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:10:46,338 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:46,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -75724510, now seen corresponding path program 2 times [2024-06-20 17:10:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908099662] [2024-06-20 17:10:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:49,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:49,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908099662] [2024-06-20 17:10:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908099662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:49,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:49,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:10:49,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489561261] [2024-06-20 17:10:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:10:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:10:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:10:49,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:49,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 300 transitions, 4651 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:49,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:49,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:49,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:51,445 INFO L124 PetriNetUnfolderBase]: 2633/4039 cut-off events. [2024-06-20 17:10:51,445 INFO L125 PetriNetUnfolderBase]: For 291400/291400 co-relation queries the response was YES. [2024-06-20 17:10:51,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31931 conditions, 4039 events. 2633/4039 cut-off events. For 291400/291400 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21335 event pairs, 572 based on Foata normal form. 2/4040 useless extension candidates. Maximal degree in co-relation 31807. Up to 3661 conditions per place. [2024-06-20 17:10:51,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 84 changer transitions 0/323 dead transitions. [2024-06-20 17:10:51,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 323 transitions, 5343 flow [2024-06-20 17:10:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:10:51,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:10:51,478 INFO L175 Difference]: Start difference. First operand has 251 places, 300 transitions, 4651 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:10:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 323 transitions, 5343 flow [2024-06-20 17:10:51,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 323 transitions, 5231 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 17:10:51,954 INFO L231 Difference]: Finished difference. Result has 255 places, 300 transitions, 4723 flow [2024-06-20 17:10:51,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=255, PETRI_TRANSITIONS=300} [2024-06-20 17:10:51,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 17:10:51,955 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 300 transitions, 4723 flow [2024-06-20 17:10:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:51,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:51,955 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] [2024-06-20 17:10:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:10:51,956 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:51,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1642512960, now seen corresponding path program 3 times [2024-06-20 17:10:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:51,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832953473] [2024-06-20 17:10:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832953473] [2024-06-20 17:10:55,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832953473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:55,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:55,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:55,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788085206] [2024-06-20 17:10:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:55,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:10:55,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 300 transitions, 4723 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:55,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:55,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:10:55,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:56,864 INFO L124 PetriNetUnfolderBase]: 2675/4107 cut-off events. [2024-06-20 17:10:56,864 INFO L125 PetriNetUnfolderBase]: For 309277/309285 co-relation queries the response was YES. [2024-06-20 17:10:56,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32936 conditions, 4107 events. 2675/4107 cut-off events. For 309277/309285 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21816 event pairs, 652 based on Foata normal form. 10/4116 useless extension candidates. Maximal degree in co-relation 32810. Up to 3557 conditions per place. [2024-06-20 17:10:56,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 103 changer transitions 0/339 dead transitions. [2024-06-20 17:10:56,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 339 transitions, 5840 flow [2024-06-20 17:10:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:10:56,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:10:56,905 INFO L175 Difference]: Start difference. First operand has 255 places, 300 transitions, 4723 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:10:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 339 transitions, 5840 flow [2024-06-20 17:10:57,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 339 transitions, 5575 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:10:57,399 INFO L231 Difference]: Finished difference. Result has 253 places, 309 transitions, 4815 flow [2024-06-20 17:10:57,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4815, PETRI_PLACES=253, PETRI_TRANSITIONS=309} [2024-06-20 17:10:57,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 17:10:57,400 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 309 transitions, 4815 flow [2024-06-20 17:10:57,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:57,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:57,400 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] [2024-06-20 17:10:57,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:10:57,400 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:57,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1462709072, now seen corresponding path program 4 times [2024-06-20 17:10:57,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:57,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225655759] [2024-06-20 17:10:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:57,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225655759] [2024-06-20 17:11:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225655759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:00,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850577124] [2024-06-20 17:11:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:00,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 309 transitions, 4815 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:00,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:00,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:00,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:02,541 INFO L124 PetriNetUnfolderBase]: 2685/4123 cut-off events. [2024-06-20 17:11:02,541 INFO L125 PetriNetUnfolderBase]: For 309050/309058 co-relation queries the response was YES. [2024-06-20 17:11:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32950 conditions, 4123 events. 2685/4123 cut-off events. For 309050/309058 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21977 event pairs, 662 based on Foata normal form. 10/4132 useless extension candidates. Maximal degree in co-relation 32826. Up to 3567 conditions per place. [2024-06-20 17:11:02,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 106 changer transitions 0/336 dead transitions. [2024-06-20 17:11:02,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 336 transitions, 5708 flow [2024-06-20 17:11:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:11:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:11:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:11:02,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:11:02,579 INFO L175 Difference]: Start difference. First operand has 253 places, 309 transitions, 4815 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:11:02,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 336 transitions, 5708 flow [2024-06-20 17:11:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 336 transitions, 5424 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:03,133 INFO L231 Difference]: Finished difference. Result has 256 places, 312 transitions, 4804 flow [2024-06-20 17:11:03,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4804, PETRI_PLACES=256, PETRI_TRANSITIONS=312} [2024-06-20 17:11:03,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 17:11:03,133 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 312 transitions, 4804 flow [2024-06-20 17:11:03,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:03,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:03,134 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] [2024-06-20 17:11:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:11:03,134 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:03,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1651445424, now seen corresponding path program 2 times [2024-06-20 17:11:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:03,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708276048] [2024-06-20 17:11:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:06,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708276048] [2024-06-20 17:11:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708276048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:06,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:06,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687012803] [2024-06-20 17:11:06,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:06,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:06,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:06,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 312 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:06,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:06,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:06,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:08,832 INFO L124 PetriNetUnfolderBase]: 2743/4219 cut-off events. [2024-06-20 17:11:08,833 INFO L125 PetriNetUnfolderBase]: For 330714/330722 co-relation queries the response was YES. [2024-06-20 17:11:08,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34031 conditions, 4219 events. 2743/4219 cut-off events. For 330714/330722 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22571 event pairs, 614 based on Foata normal form. 10/4228 useless extension candidates. Maximal degree in co-relation 33906. Up to 3134 conditions per place. [2024-06-20 17:11:08,871 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 185 changer transitions 0/354 dead transitions. [2024-06-20 17:11:08,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 354 transitions, 6148 flow [2024-06-20 17:11:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:11:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:11:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 17:11:08,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 17:11:08,872 INFO L175 Difference]: Start difference. First operand has 256 places, 312 transitions, 4804 flow. Second operand 11 states and 175 transitions. [2024-06-20 17:11:08,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 354 transitions, 6148 flow [2024-06-20 17:11:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 354 transitions, 5996 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:09,461 INFO L231 Difference]: Finished difference. Result has 263 places, 321 transitions, 5318 flow [2024-06-20 17:11:09,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5318, PETRI_PLACES=263, PETRI_TRANSITIONS=321} [2024-06-20 17:11:09,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 17:11:09,462 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 321 transitions, 5318 flow [2024-06-20 17:11:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:09,463 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] [2024-06-20 17:11:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:11:09,463 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:09,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -775739170, now seen corresponding path program 5 times [2024-06-20 17:11:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341791059] [2024-06-20 17:11:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:12,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341791059] [2024-06-20 17:11:12,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341791059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:12,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:12,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:11:12,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458261525] [2024-06-20 17:11:12,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:11:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:11:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:11:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 321 transitions, 5318 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:12,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:14,238 INFO L124 PetriNetUnfolderBase]: 2753/4226 cut-off events. [2024-06-20 17:11:14,239 INFO L125 PetriNetUnfolderBase]: For 349551/349578 co-relation queries the response was YES. [2024-06-20 17:11:14,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35297 conditions, 4226 events. 2753/4226 cut-off events. For 349551/349578 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22568 event pairs, 613 based on Foata normal form. 19/4244 useless extension candidates. Maximal degree in co-relation 35169. Up to 3657 conditions per place. [2024-06-20 17:11:14,274 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 105 changer transitions 0/349 dead transitions. [2024-06-20 17:11:14,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 349 transitions, 6369 flow [2024-06-20 17:11:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:11:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:11:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:11:14,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:11:14,276 INFO L175 Difference]: Start difference. First operand has 263 places, 321 transitions, 5318 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:11:14,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 349 transitions, 6369 flow [2024-06-20 17:11:14,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 349 transitions, 6062 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:14,849 INFO L231 Difference]: Finished difference. Result has 264 places, 324 transitions, 5286 flow [2024-06-20 17:11:14,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5286, PETRI_PLACES=264, PETRI_TRANSITIONS=324} [2024-06-20 17:11:14,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 17:11:14,850 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 324 transitions, 5286 flow [2024-06-20 17:11:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:14,850 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] [2024-06-20 17:11:14,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:11:14,851 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:14,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1953552430, now seen corresponding path program 1 times [2024-06-20 17:11:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519538231] [2024-06-20 17:11:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:14,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519538231] [2024-06-20 17:11:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519538231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:17,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:17,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:11:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389532175] [2024-06-20 17:11:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:11:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:11:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:11:17,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 324 transitions, 5286 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:17,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:17,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:17,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:19,517 INFO L124 PetriNetUnfolderBase]: 2793/4289 cut-off events. [2024-06-20 17:11:19,517 INFO L125 PetriNetUnfolderBase]: For 366976/367007 co-relation queries the response was YES. [2024-06-20 17:11:19,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35707 conditions, 4289 events. 2793/4289 cut-off events. For 366976/367007 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22968 event pairs, 571 based on Foata normal form. 35/4324 useless extension candidates. Maximal degree in co-relation 35577. Up to 3670 conditions per place. [2024-06-20 17:11:19,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 117 changer transitions 0/357 dead transitions. [2024-06-20 17:11:19,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 357 transitions, 6309 flow [2024-06-20 17:11:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:11:19,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 17:11:19,563 INFO L175 Difference]: Start difference. First operand has 264 places, 324 transitions, 5286 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:11:19,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 357 transitions, 6309 flow [2024-06-20 17:11:20,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 357 transitions, 5884 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:20,154 INFO L231 Difference]: Finished difference. Result has 266 places, 331 transitions, 5243 flow [2024-06-20 17:11:20,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5243, PETRI_PLACES=266, PETRI_TRANSITIONS=331} [2024-06-20 17:11:20,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:11:20,155 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 331 transitions, 5243 flow [2024-06-20 17:11:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:20,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:20,156 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] [2024-06-20 17:11:20,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:11:20,156 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:20,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1953552802, now seen corresponding path program 6 times [2024-06-20 17:11:20,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:20,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857985528] [2024-06-20 17:11:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857985528] [2024-06-20 17:11:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857985528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:23,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:23,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:11:23,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092687500] [2024-06-20 17:11:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:23,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:11:23,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:23,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:11:23,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:11:23,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:23,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 331 transitions, 5243 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:23,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:23,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:23,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:25,032 INFO L124 PetriNetUnfolderBase]: 2803/4300 cut-off events. [2024-06-20 17:11:25,032 INFO L125 PetriNetUnfolderBase]: For 364023/364050 co-relation queries the response was YES. [2024-06-20 17:11:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35596 conditions, 4300 events. 2803/4300 cut-off events. For 364023/364050 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22961 event pairs, 615 based on Foata normal form. 19/4318 useless extension candidates. Maximal degree in co-relation 35468. Up to 3723 conditions per place. [2024-06-20 17:11:25,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 244 selfloop transitions, 106 changer transitions 0/354 dead transitions. [2024-06-20 17:11:25,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 354 transitions, 6157 flow [2024-06-20 17:11:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:11:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:11:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:11:25,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:11:25,073 INFO L175 Difference]: Start difference. First operand has 266 places, 331 transitions, 5243 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:11:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 354 transitions, 6157 flow [2024-06-20 17:11:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 354 transitions, 5957 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:25,707 INFO L231 Difference]: Finished difference. Result has 267 places, 334 transitions, 5306 flow [2024-06-20 17:11:25,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5306, PETRI_PLACES=267, PETRI_TRANSITIONS=334} [2024-06-20 17:11:25,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 17:11:25,708 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 334 transitions, 5306 flow [2024-06-20 17:11:25,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:11:25,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:25,708 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] [2024-06-20 17:11:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:11:25,708 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:25,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1119558562, now seen corresponding path program 7 times [2024-06-20 17:11:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:25,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33169884] [2024-06-20 17:11:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:25,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33169884] [2024-06-20 17:11:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33169884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967353485] [2024-06-20 17:11:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:28,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:28,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 334 transitions, 5306 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:28,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:28,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:28,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:30,889 INFO L124 PetriNetUnfolderBase]: 2797/4303 cut-off events. [2024-06-20 17:11:30,889 INFO L125 PetriNetUnfolderBase]: For 359228/359236 co-relation queries the response was YES. [2024-06-20 17:11:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35289 conditions, 4303 events. 2797/4303 cut-off events. For 359228/359236 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23139 event pairs, 682 based on Foata normal form. 10/4312 useless extension candidates. Maximal degree in co-relation 35161. Up to 3718 conditions per place. [2024-06-20 17:11:30,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 112 changer transitions 0/356 dead transitions. [2024-06-20 17:11:30,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 356 transitions, 6312 flow [2024-06-20 17:11:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:11:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:11:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:11:30,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:11:30,928 INFO L175 Difference]: Start difference. First operand has 267 places, 334 transitions, 5306 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:11:30,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 356 transitions, 6312 flow [2024-06-20 17:11:31,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 356 transitions, 6147 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:11:31,459 INFO L231 Difference]: Finished difference. Result has 271 places, 334 transitions, 5372 flow [2024-06-20 17:11:31,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5372, PETRI_PLACES=271, PETRI_TRANSITIONS=334} [2024-06-20 17:11:31,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 17:11:31,460 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 334 transitions, 5372 flow [2024-06-20 17:11:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:31,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:31,460 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] [2024-06-20 17:11:31,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:11:31,460 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:31,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1453443110, now seen corresponding path program 2 times [2024-06-20 17:11:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:31,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087783766] [2024-06-20 17:11:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:31,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:34,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:34,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087783766] [2024-06-20 17:11:34,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087783766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:34,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:34,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466714585] [2024-06-20 17:11:34,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:34,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:34,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:34,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:34,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 334 transitions, 5372 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:34,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:34,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:34,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:36,744 INFO L124 PetriNetUnfolderBase]: 2837/4356 cut-off events. [2024-06-20 17:11:36,744 INFO L125 PetriNetUnfolderBase]: For 384453/384465 co-relation queries the response was YES. [2024-06-20 17:11:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35921 conditions, 4356 events. 2837/4356 cut-off events. For 384453/384465 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23388 event pairs, 583 based on Foata normal form. 20/4376 useless extension candidates. Maximal degree in co-relation 35792. Up to 3708 conditions per place. [2024-06-20 17:11:36,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 130 changer transitions 0/373 dead transitions. [2024-06-20 17:11:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 6563 flow [2024-06-20 17:11:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-20 17:11:36,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2024-06-20 17:11:36,788 INFO L175 Difference]: Start difference. First operand has 271 places, 334 transitions, 5372 flow. Second operand 12 states and 185 transitions. [2024-06-20 17:11:36,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 6563 flow [2024-06-20 17:11:37,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 373 transitions, 6227 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:37,416 INFO L231 Difference]: Finished difference. Result has 275 places, 340 transitions, 5435 flow [2024-06-20 17:11:37,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5435, PETRI_PLACES=275, PETRI_TRANSITIONS=340} [2024-06-20 17:11:37,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 17:11:37,416 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 340 transitions, 5435 flow [2024-06-20 17:11:37,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:37,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:37,416 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] [2024-06-20 17:11:37,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:11:37,417 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:37,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1422551466, now seen corresponding path program 3 times [2024-06-20 17:11:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:37,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804713617] [2024-06-20 17:11:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804713617] [2024-06-20 17:11:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804713617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260823150] [2024-06-20 17:11:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:40,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:40,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 340 transitions, 5435 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:40,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:40,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:40,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:42,838 INFO L124 PetriNetUnfolderBase]: 2813/4324 cut-off events. [2024-06-20 17:11:42,838 INFO L125 PetriNetUnfolderBase]: For 377408/377420 co-relation queries the response was YES. [2024-06-20 17:11:42,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35239 conditions, 4324 events. 2813/4324 cut-off events. For 377408/377420 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23191 event pairs, 587 based on Foata normal form. 20/4344 useless extension candidates. Maximal degree in co-relation 35111. Up to 3692 conditions per place. [2024-06-20 17:11:42,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 130 changer transitions 0/372 dead transitions. [2024-06-20 17:11:42,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 372 transitions, 6371 flow [2024-06-20 17:11:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-20 17:11:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:11:42,887 INFO L175 Difference]: Start difference. First operand has 275 places, 340 transitions, 5435 flow. Second operand 12 states and 184 transitions. [2024-06-20 17:11:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 372 transitions, 6371 flow [2024-06-20 17:11:43,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 372 transitions, 6031 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-20 17:11:43,617 INFO L231 Difference]: Finished difference. Result has 277 places, 340 transitions, 5370 flow [2024-06-20 17:11:43,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5370, PETRI_PLACES=277, PETRI_TRANSITIONS=340} [2024-06-20 17:11:43,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 17:11:43,618 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 340 transitions, 5370 flow [2024-06-20 17:11:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:43,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:43,618 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] [2024-06-20 17:11:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:11:43,618 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)] === [2024-06-20 17:11:43,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1642179834, now seen corresponding path program 3 times [2024-06-20 17:11:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045672124] [2024-06-20 17:11:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045672124] [2024-06-20 17:11:47,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045672124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:47,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:47,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158312028] [2024-06-20 17:11:47,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:47,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:47,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:47,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:47,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:47,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 340 transitions, 5370 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:49,602 INFO L124 PetriNetUnfolderBase]: 2839/4367 cut-off events. [2024-06-20 17:11:49,603 INFO L125 PetriNetUnfolderBase]: For 369516/369524 co-relation queries the response was YES. [2024-06-20 17:11:49,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35483 conditions, 4367 events. 2839/4367 cut-off events. For 369516/369524 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23542 event pairs, 614 based on Foata normal form. 10/4376 useless extension candidates. Maximal degree in co-relation 35355. Up to 3182 conditions per place. [2024-06-20 17:11:49,639 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 200 changer transitions 0/375 dead transitions. [2024-06-20 17:11:49,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 375 transitions, 6794 flow [2024-06-20 17:11:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 17:11:49,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 17:11:49,641 INFO L175 Difference]: Start difference. First operand has 277 places, 340 transitions, 5370 flow. Second operand 10 states and 164 transitions. [2024-06-20 17:11:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 375 transitions, 6794 flow [2024-06-20 17:11:50,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 375 transitions, 6560 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 17:11:50,282 INFO L231 Difference]: Finished difference. Result has 277 places, 346 transitions, 5649 flow [2024-06-20 17:11:50,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5144, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5649, PETRI_PLACES=277, PETRI_TRANSITIONS=346} [2024-06-20 17:11:50,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 17:11:50,283 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 346 transitions, 5649 flow [2024-06-20 17:11:50,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:50,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:50,283 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] [2024-06-20 17:11:50,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:11:50,283 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)] === [2024-06-20 17:11:50,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1453454456, now seen corresponding path program 4 times [2024-06-20 17:11:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:50,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135265821] [2024-06-20 17:11:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:50,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:53,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135265821] [2024-06-20 17:11:53,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135265821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:53,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:53,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208459843] [2024-06-20 17:11:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:53,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:11:53,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 346 transitions, 5649 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:53,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:53,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:11:53,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:56,116 INFO L124 PetriNetUnfolderBase]: 2833/4359 cut-off events. [2024-06-20 17:11:56,116 INFO L125 PetriNetUnfolderBase]: For 366479/366487 co-relation queries the response was YES. [2024-06-20 17:11:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35570 conditions, 4359 events. 2833/4359 cut-off events. For 366479/366487 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23493 event pairs, 619 based on Foata normal form. 10/4368 useless extension candidates. Maximal degree in co-relation 35442. Up to 3179 conditions per place. [2024-06-20 17:11:56,310 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 202 changer transitions 0/377 dead transitions. [2024-06-20 17:11:56,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 377 transitions, 6853 flow [2024-06-20 17:11:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-20 17:11:56,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:11:56,312 INFO L175 Difference]: Start difference. First operand has 277 places, 346 transitions, 5649 flow. Second operand 12 states and 186 transitions. [2024-06-20 17:11:56,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 377 transitions, 6853 flow [2024-06-20 17:11:56,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 377 transitions, 6441 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:56,942 INFO L231 Difference]: Finished difference. Result has 283 places, 346 transitions, 5647 flow [2024-06-20 17:11:56,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5237, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5647, PETRI_PLACES=283, PETRI_TRANSITIONS=346} [2024-06-20 17:11:56,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:11:56,943 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 346 transitions, 5647 flow [2024-06-20 17:11:56,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:56,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:56,943 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] [2024-06-20 17:11:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:11:56,943 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)] === [2024-06-20 17:11:56,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1007727646, now seen corresponding path program 8 times [2024-06-20 17:11:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151344311] [2024-06-20 17:11:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:00,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151344311] [2024-06-20 17:12:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151344311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:00,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669243013] [2024-06-20 17:12:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:00,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:00,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 346 transitions, 5647 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:00,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:00,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:00,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:02,163 INFO L124 PetriNetUnfolderBase]: 2827/4351 cut-off events. [2024-06-20 17:12:02,163 INFO L125 PetriNetUnfolderBase]: For 371128/371136 co-relation queries the response was YES. [2024-06-20 17:12:02,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35467 conditions, 4351 events. 2827/4351 cut-off events. For 371128/371136 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23425 event pairs, 693 based on Foata normal form. 10/4360 useless extension candidates. Maximal degree in co-relation 35338. Up to 3765 conditions per place. [2024-06-20 17:12:02,208 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 112 changer transitions 0/366 dead transitions. [2024-06-20 17:12:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 366 transitions, 6549 flow [2024-06-20 17:12:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:12:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:12:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:12:02,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:12:02,210 INFO L175 Difference]: Start difference. First operand has 283 places, 346 transitions, 5647 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:12:02,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 366 transitions, 6549 flow [2024-06-20 17:12:02,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 366 transitions, 6226 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:02,933 INFO L231 Difference]: Finished difference. Result has 282 places, 346 transitions, 5554 flow [2024-06-20 17:12:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5324, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5554, PETRI_PLACES=282, PETRI_TRANSITIONS=346} [2024-06-20 17:12:02,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 17:12:02,933 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 346 transitions, 5554 flow [2024-06-20 17:12:02,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:02,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:02,934 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] [2024-06-20 17:12:02,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:12:02,934 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)] === [2024-06-20 17:12:02,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1226817552, now seen corresponding path program 4 times [2024-06-20 17:12:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277346704] [2024-06-20 17:12:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277346704] [2024-06-20 17:12:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277346704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:05,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841574907] [2024-06-20 17:12:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:05,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:05,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 346 transitions, 5554 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:05,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:05,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:05,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:07,394 INFO L124 PetriNetUnfolderBase]: 2867/4395 cut-off events. [2024-06-20 17:12:07,395 INFO L125 PetriNetUnfolderBase]: For 394850/394850 co-relation queries the response was YES. [2024-06-20 17:12:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35857 conditions, 4395 events. 2867/4395 cut-off events. For 394850/394850 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23521 event pairs, 651 based on Foata normal form. 8/4402 useless extension candidates. Maximal degree in co-relation 35727. Up to 4036 conditions per place. [2024-06-20 17:12:07,433 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 75 changer transitions 0/373 dead transitions. [2024-06-20 17:12:07,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 373 transitions, 6627 flow [2024-06-20 17:12:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:12:07,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:12:07,435 INFO L175 Difference]: Start difference. First operand has 282 places, 346 transitions, 5554 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:12:07,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 373 transitions, 6627 flow [2024-06-20 17:12:08,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 373 transitions, 6303 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:12:08,042 INFO L231 Difference]: Finished difference. Result has 283 places, 352 transitions, 5549 flow [2024-06-20 17:12:08,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5549, PETRI_PLACES=283, PETRI_TRANSITIONS=352} [2024-06-20 17:12:08,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:12:08,049 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 352 transitions, 5549 flow [2024-06-20 17:12:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:08,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:08,049 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] [2024-06-20 17:12:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:12:08,050 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)] === [2024-06-20 17:12:08,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1223250048, now seen corresponding path program 9 times [2024-06-20 17:12:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617154291] [2024-06-20 17:12:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:10,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617154291] [2024-06-20 17:12:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617154291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:10,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:10,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:10,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400464169] [2024-06-20 17:12:10,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:10,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:10,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:10,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 352 transitions, 5549 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:10,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:10,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:10,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:12,497 INFO L124 PetriNetUnfolderBase]: 2861/4389 cut-off events. [2024-06-20 17:12:12,497 INFO L125 PetriNetUnfolderBase]: For 385543/385543 co-relation queries the response was YES. [2024-06-20 17:12:12,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 4389 events. 2861/4389 cut-off events. For 385543/385543 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23586 event pairs, 719 based on Foata normal form. 2/4390 useless extension candidates. Maximal degree in co-relation 35576. Up to 4177 conditions per place. [2024-06-20 17:12:12,541 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 45 changer transitions 0/368 dead transitions. [2024-06-20 17:12:12,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 368 transitions, 6449 flow [2024-06-20 17:12:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:12:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:12:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:12:12,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 17:12:12,542 INFO L175 Difference]: Start difference. First operand has 283 places, 352 transitions, 5549 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:12:12,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 368 transitions, 6449 flow [2024-06-20 17:12:13,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 368 transitions, 6269 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 17:12:13,091 INFO L231 Difference]: Finished difference. Result has 283 places, 352 transitions, 5468 flow [2024-06-20 17:12:13,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5371, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5468, PETRI_PLACES=283, PETRI_TRANSITIONS=352} [2024-06-20 17:12:13,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:12:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 352 transitions, 5468 flow [2024-06-20 17:12:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:13,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:13,092 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] [2024-06-20 17:12:13,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:12:13,092 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)] === [2024-06-20 17:12:13,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1223244282, now seen corresponding path program 5 times [2024-06-20 17:12:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:13,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467697703] [2024-06-20 17:12:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:16,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467697703] [2024-06-20 17:12:16,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467697703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:16,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:16,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215799139] [2024-06-20 17:12:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:16,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:16,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 352 transitions, 5468 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:16,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:16,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:16,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:18,292 INFO L124 PetriNetUnfolderBase]: 2966/4556 cut-off events. [2024-06-20 17:12:18,293 INFO L125 PetriNetUnfolderBase]: For 409660/409660 co-relation queries the response was YES. [2024-06-20 17:12:18,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37195 conditions, 4556 events. 2966/4556 cut-off events. For 409660/409660 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24745 event pairs, 683 based on Foata normal form. 2/4557 useless extension candidates. Maximal degree in co-relation 37065. Up to 4059 conditions per place. [2024-06-20 17:12:18,333 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 304 selfloop transitions, 89 changer transitions 0/397 dead transitions. [2024-06-20 17:12:18,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 397 transitions, 7040 flow [2024-06-20 17:12:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:12:18,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:12:18,335 INFO L175 Difference]: Start difference. First operand has 283 places, 352 transitions, 5468 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:12:18,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 397 transitions, 7040 flow [2024-06-20 17:12:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 397 transitions, 6913 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:12:18,959 INFO L231 Difference]: Finished difference. Result has 288 places, 371 transitions, 5926 flow [2024-06-20 17:12:18,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5926, PETRI_PLACES=288, PETRI_TRANSITIONS=371} [2024-06-20 17:12:18,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-20 17:12:18,959 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 371 transitions, 5926 flow [2024-06-20 17:12:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:18,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:18,960 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] [2024-06-20 17:12:18,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:12:18,960 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)] === [2024-06-20 17:12:18,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -249981636, now seen corresponding path program 5 times [2024-06-20 17:12:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:18,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103676801] [2024-06-20 17:12:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:21,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:21,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103676801] [2024-06-20 17:12:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103676801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:21,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:21,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:21,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245409631] [2024-06-20 17:12:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:21,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:21,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 371 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:21,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:21,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:21,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:23,336 INFO L124 PetriNetUnfolderBase]: 2942/4512 cut-off events. [2024-06-20 17:12:23,337 INFO L125 PetriNetUnfolderBase]: For 417002/417002 co-relation queries the response was YES. [2024-06-20 17:12:23,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36921 conditions, 4512 events. 2942/4512 cut-off events. For 417002/417002 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24412 event pairs, 647 based on Foata normal form. 8/4519 useless extension candidates. Maximal degree in co-relation 36788. Up to 4157 conditions per place. [2024-06-20 17:12:23,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 75 changer transitions 0/391 dead transitions. [2024-06-20 17:12:23,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 391 transitions, 6744 flow [2024-06-20 17:12:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:12:23,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:12:23,388 INFO L175 Difference]: Start difference. First operand has 288 places, 371 transitions, 5926 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:12:23,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 391 transitions, 6744 flow [2024-06-20 17:12:24,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 391 transitions, 6659 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:12:24,268 INFO L231 Difference]: Finished difference. Result has 293 places, 371 transitions, 6008 flow [2024-06-20 17:12:24,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5841, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6008, PETRI_PLACES=293, PETRI_TRANSITIONS=371} [2024-06-20 17:12:24,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-20 17:12:24,268 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 371 transitions, 6008 flow [2024-06-20 17:12:24,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:24,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:24,269 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] [2024-06-20 17:12:24,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:12:24,269 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)] === [2024-06-20 17:12:24,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1934437396, now seen corresponding path program 6 times [2024-06-20 17:12:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982736340] [2024-06-20 17:12:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:27,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:27,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982736340] [2024-06-20 17:12:27,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982736340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:27,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:27,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:27,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399425954] [2024-06-20 17:12:27,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:27,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:27,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:27,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 371 transitions, 6008 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:29,921 INFO L124 PetriNetUnfolderBase]: 2936/4512 cut-off events. [2024-06-20 17:12:29,922 INFO L125 PetriNetUnfolderBase]: For 407991/407991 co-relation queries the response was YES. [2024-06-20 17:12:29,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37056 conditions, 4512 events. 2936/4512 cut-off events. For 407991/407991 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24538 event pairs, 655 based on Foata normal form. 2/4513 useless extension candidates. Maximal degree in co-relation 36921. Up to 4044 conditions per place. [2024-06-20 17:12:29,965 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 85 changer transitions 0/396 dead transitions. [2024-06-20 17:12:29,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 396 transitions, 7142 flow [2024-06-20 17:12:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 17:12:29,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-20 17:12:29,966 INFO L175 Difference]: Start difference. First operand has 293 places, 371 transitions, 6008 flow. Second operand 10 states and 156 transitions. [2024-06-20 17:12:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 396 transitions, 7142 flow [2024-06-20 17:12:30,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 396 transitions, 6929 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:30,755 INFO L231 Difference]: Finished difference. Result has 295 places, 373 transitions, 6023 flow [2024-06-20 17:12:30,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=284, 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=6023, PETRI_PLACES=295, PETRI_TRANSITIONS=373} [2024-06-20 17:12:30,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 17:12:30,755 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 373 transitions, 6023 flow [2024-06-20 17:12:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:30,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:30,756 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] [2024-06-20 17:12:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:12:30,756 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)] === [2024-06-20 17:12:30,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -257344632, now seen corresponding path program 7 times [2024-06-20 17:12:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309809068] [2024-06-20 17:12:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309809068] [2024-06-20 17:12:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309809068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283941008] [2024-06-20 17:12:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:33,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:33,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 373 transitions, 6023 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:33,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:33,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:33,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:36,045 INFO L124 PetriNetUnfolderBase]: 2930/4500 cut-off events. [2024-06-20 17:12:36,046 INFO L125 PetriNetUnfolderBase]: For 402727/402727 co-relation queries the response was YES. [2024-06-20 17:12:36,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36887 conditions, 4500 events. 2930/4500 cut-off events. For 402727/402727 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24381 event pairs, 670 based on Foata normal form. 2/4501 useless extension candidates. Maximal degree in co-relation 36751. Up to 4041 conditions per place. [2024-06-20 17:12:36,085 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 88 changer transitions 0/395 dead transitions. [2024-06-20 17:12:36,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 395 transitions, 6993 flow [2024-06-20 17:12:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-20 17:12:36,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:12:36,087 INFO L175 Difference]: Start difference. First operand has 295 places, 373 transitions, 6023 flow. Second operand 10 states and 154 transitions. [2024-06-20 17:12:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 395 transitions, 6993 flow [2024-06-20 17:12:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 395 transitions, 6854 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:36,835 INFO L231 Difference]: Finished difference. Result has 299 places, 373 transitions, 6066 flow [2024-06-20 17:12:36,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6066, PETRI_PLACES=299, PETRI_TRANSITIONS=373} [2024-06-20 17:12:36,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 17:12:36,835 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 373 transitions, 6066 flow [2024-06-20 17:12:36,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:36,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:36,836 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] [2024-06-20 17:12:36,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:12:36,836 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)] === [2024-06-20 17:12:36,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1223255628, now seen corresponding path program 10 times [2024-06-20 17:12:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300833281] [2024-06-20 17:12:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:39,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300833281] [2024-06-20 17:12:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300833281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:39,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132425459] [2024-06-20 17:12:39,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:40,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:40,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 373 transitions, 6066 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:40,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:40,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:40,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:41,877 INFO L124 PetriNetUnfolderBase]: 2918/4480 cut-off events. [2024-06-20 17:12:41,877 INFO L125 PetriNetUnfolderBase]: For 410487/410487 co-relation queries the response was YES. [2024-06-20 17:12:41,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36637 conditions, 4480 events. 2918/4480 cut-off events. For 410487/410487 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24314 event pairs, 718 based on Foata normal form. 4/4483 useless extension candidates. Maximal degree in co-relation 36500. Up to 4250 conditions per place. [2024-06-20 17:12:41,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 54 changer transitions 0/389 dead transitions. [2024-06-20 17:12:41,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 389 transitions, 6872 flow [2024-06-20 17:12:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-20 17:12:41,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-20 17:12:41,928 INFO L175 Difference]: Start difference. First operand has 299 places, 373 transitions, 6066 flow. Second operand 9 states and 133 transitions. [2024-06-20 17:12:41,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 389 transitions, 6872 flow [2024-06-20 17:12:42,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 389 transitions, 6668 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:42,759 INFO L231 Difference]: Finished difference. Result has 299 places, 373 transitions, 5980 flow [2024-06-20 17:12:42,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5980, PETRI_PLACES=299, PETRI_TRANSITIONS=373} [2024-06-20 17:12:42,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 17:12:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 373 transitions, 5980 flow [2024-06-20 17:12:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:42,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:42,760 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] [2024-06-20 17:12:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:12:42,760 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)] === [2024-06-20 17:12:42,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1616317364, now seen corresponding path program 6 times [2024-06-20 17:12:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424461664] [2024-06-20 17:12:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:45,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:45,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424461664] [2024-06-20 17:12:45,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424461664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:45,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:45,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:45,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150287734] [2024-06-20 17:12:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:45,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:45,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:45,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:45,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 373 transitions, 5980 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:45,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:45,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:45,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:47,186 INFO L124 PetriNetUnfolderBase]: 2938/4518 cut-off events. [2024-06-20 17:12:47,186 INFO L125 PetriNetUnfolderBase]: For 418854/418888 co-relation queries the response was YES. [2024-06-20 17:12:47,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36776 conditions, 4518 events. 2938/4518 cut-off events. For 418854/418888 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24588 event pairs, 616 based on Foata normal form. 33/4551 useless extension candidates. Maximal degree in co-relation 36638. Up to 3717 conditions per place. [2024-06-20 17:12:47,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 128 changer transitions 0/403 dead transitions. [2024-06-20 17:12:47,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 403 transitions, 7042 flow [2024-06-20 17:12:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:12:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:12:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:12:47,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:12:47,228 INFO L175 Difference]: Start difference. First operand has 299 places, 373 transitions, 5980 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:12:47,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 403 transitions, 7042 flow [2024-06-20 17:12:48,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 403 transitions, 6899 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:48,051 INFO L231 Difference]: Finished difference. Result has 298 places, 377 transitions, 6161 flow [2024-06-20 17:12:48,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5837, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6161, PETRI_PLACES=298, PETRI_TRANSITIONS=377} [2024-06-20 17:12:48,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-20 17:12:48,052 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 377 transitions, 6161 flow [2024-06-20 17:12:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:12:48,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:48,052 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] [2024-06-20 17:12:48,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:12:48,053 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)] === [2024-06-20 17:12:48,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 628786224, now seen corresponding path program 7 times [2024-06-20 17:12:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147042672] [2024-06-20 17:12:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147042672] [2024-06-20 17:12:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147042672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965882940] [2024-06-20 17:12:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:51,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:51,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 377 transitions, 6161 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:51,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:51,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:51,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:53,078 INFO L124 PetriNetUnfolderBase]: 2958/4553 cut-off events. [2024-06-20 17:12:53,079 INFO L125 PetriNetUnfolderBase]: For 430631/430643 co-relation queries the response was YES. [2024-06-20 17:12:53,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37512 conditions, 4553 events. 2958/4553 cut-off events. For 430631/430643 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24761 event pairs, 677 based on Foata normal form. 16/4569 useless extension candidates. Maximal degree in co-relation 37373. Up to 3733 conditions per place. [2024-06-20 17:12:53,129 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 139 changer transitions 0/410 dead transitions. [2024-06-20 17:12:53,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 410 transitions, 7384 flow [2024-06-20 17:12:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:12:53,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:12:53,131 INFO L175 Difference]: Start difference. First operand has 298 places, 377 transitions, 6161 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:12:53,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 410 transitions, 7384 flow [2024-06-20 17:12:54,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 410 transitions, 7224 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:12:54,140 INFO L231 Difference]: Finished difference. Result has 303 places, 380 transitions, 6338 flow [2024-06-20 17:12:54,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6338, PETRI_PLACES=303, PETRI_TRANSITIONS=380} [2024-06-20 17:12:54,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-20 17:12:54,141 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 380 transitions, 6338 flow [2024-06-20 17:12:54,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:54,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:54,141 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] [2024-06-20 17:12:54,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:12:54,142 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)] === [2024-06-20 17:12:54,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1887925304, now seen corresponding path program 8 times [2024-06-20 17:12:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797109050] [2024-06-20 17:12:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:54,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797109050] [2024-06-20 17:12:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797109050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947784909] [2024-06-20 17:12:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:57,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:12:57,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 380 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:57,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:57,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:12:57,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:59,627 INFO L124 PetriNetUnfolderBase]: 2978/4581 cut-off events. [2024-06-20 17:12:59,627 INFO L125 PetriNetUnfolderBase]: For 445643/445655 co-relation queries the response was YES. [2024-06-20 17:12:59,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37878 conditions, 4581 events. 2978/4581 cut-off events. For 445643/445655 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24945 event pairs, 677 based on Foata normal form. 16/4597 useless extension candidates. Maximal degree in co-relation 37737. Up to 3749 conditions per place. [2024-06-20 17:12:59,670 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 145 changer transitions 0/416 dead transitions. [2024-06-20 17:12:59,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 416 transitions, 7586 flow [2024-06-20 17:12:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:12:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:12:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 17:12:59,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 17:12:59,672 INFO L175 Difference]: Start difference. First operand has 303 places, 380 transitions, 6338 flow. Second operand 11 states and 174 transitions. [2024-06-20 17:12:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 416 transitions, 7586 flow [2024-06-20 17:13:00,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 416 transitions, 7241 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:00,670 INFO L231 Difference]: Finished difference. Result has 308 places, 383 transitions, 6345 flow [2024-06-20 17:13:00,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6345, PETRI_PLACES=308, PETRI_TRANSITIONS=383} [2024-06-20 17:13:00,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 17:13:00,671 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 383 transitions, 6345 flow [2024-06-20 17:13:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:00,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:00,671 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] [2024-06-20 17:13:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:13:00,672 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)] === [2024-06-20 17:13:00,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 900501382, now seen corresponding path program 8 times [2024-06-20 17:13:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:00,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634079617] [2024-06-20 17:13:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634079617] [2024-06-20 17:13:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634079617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:04,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:04,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433643669] [2024-06-20 17:13:04,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:04,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:04,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:04,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:04,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 383 transitions, 6345 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:04,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:04,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:04,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:06,410 INFO L124 PetriNetUnfolderBase]: 2988/4592 cut-off events. [2024-06-20 17:13:06,410 INFO L125 PetriNetUnfolderBase]: For 451757/451765 co-relation queries the response was YES. [2024-06-20 17:13:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38042 conditions, 4592 events. 2988/4592 cut-off events. For 451757/451765 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25081 event pairs, 862 based on Foata normal form. 10/4601 useless extension candidates. Maximal degree in co-relation 37900. Up to 3019 conditions per place. [2024-06-20 17:13:06,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 226 changer transitions 0/418 dead transitions. [2024-06-20 17:13:06,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 418 transitions, 7747 flow [2024-06-20 17:13:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:13:06,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 17:13:06,459 INFO L175 Difference]: Start difference. First operand has 308 places, 383 transitions, 6345 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:13:06,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 418 transitions, 7747 flow [2024-06-20 17:13:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 418 transitions, 7403 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-20 17:13:07,596 INFO L231 Difference]: Finished difference. Result has 309 places, 392 transitions, 6849 flow [2024-06-20 17:13:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6849, PETRI_PLACES=309, PETRI_TRANSITIONS=392} [2024-06-20 17:13:07,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 17:13:07,597 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 392 transitions, 6849 flow [2024-06-20 17:13:07,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:07,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:07,597 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] [2024-06-20 17:13:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:13:07,598 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)] === [2024-06-20 17:13:07,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1387003086, now seen corresponding path program 9 times [2024-06-20 17:13:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349957008] [2024-06-20 17:13:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:10,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:10,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349957008] [2024-06-20 17:13:10,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349957008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:10,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:10,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236757049] [2024-06-20 17:13:10,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:10,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 392 transitions, 6849 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:10,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:10,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:10,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:13,528 INFO L124 PetriNetUnfolderBase]: 2976/4583 cut-off events. [2024-06-20 17:13:13,529 INFO L125 PetriNetUnfolderBase]: For 458287/458299 co-relation queries the response was YES. [2024-06-20 17:13:13,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38648 conditions, 4583 events. 2976/4583 cut-off events. For 458287/458299 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25004 event pairs, 665 based on Foata normal form. 16/4599 useless extension candidates. Maximal degree in co-relation 38504. Up to 3755 conditions per place. [2024-06-20 17:13:13,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 147 changer transitions 0/426 dead transitions. [2024-06-20 17:13:13,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 426 transitions, 7919 flow [2024-06-20 17:13:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:13:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:13:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-20 17:13:13,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:13:13,573 INFO L175 Difference]: Start difference. First operand has 309 places, 392 transitions, 6849 flow. Second operand 12 states and 184 transitions. [2024-06-20 17:13:13,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 426 transitions, 7919 flow [2024-06-20 17:13:14,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 426 transitions, 7706 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-20 17:13:14,465 INFO L231 Difference]: Finished difference. Result has 316 places, 392 transitions, 6936 flow [2024-06-20 17:13:14,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6936, PETRI_PLACES=316, PETRI_TRANSITIONS=392} [2024-06-20 17:13:14,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 17:13:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 392 transitions, 6936 flow [2024-06-20 17:13:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:14,466 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, 1] [2024-06-20 17:13:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:13:14,467 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)] === [2024-06-20 17:13:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash 636879676, now seen corresponding path program 10 times [2024-06-20 17:13:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38884280] [2024-06-20 17:13:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38884280] [2024-06-20 17:13:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38884280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:17,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:17,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:17,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533975341] [2024-06-20 17:13:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:17,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:17,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:17,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 392 transitions, 6936 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:17,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:17,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:17,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:19,012 INFO L124 PetriNetUnfolderBase]: 2984/4572 cut-off events. [2024-06-20 17:13:19,012 INFO L125 PetriNetUnfolderBase]: For 462259/462259 co-relation queries the response was YES. [2024-06-20 17:13:19,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37479 conditions, 4572 events. 2984/4572 cut-off events. For 462259/462259 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24791 event pairs, 649 based on Foata normal form. 8/4579 useless extension candidates. Maximal degree in co-relation 37333. Up to 4048 conditions per place. [2024-06-20 17:13:19,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 315 selfloop transitions, 103 changer transitions 0/422 dead transitions. [2024-06-20 17:13:19,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 422 transitions, 8189 flow [2024-06-20 17:13:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:13:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:13:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-20 17:13:19,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-20 17:13:19,063 INFO L175 Difference]: Start difference. First operand has 316 places, 392 transitions, 6936 flow. Second operand 11 states and 172 transitions. [2024-06-20 17:13:19,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 422 transitions, 8189 flow [2024-06-20 17:13:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 422 transitions, 7867 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 17:13:19,937 INFO L231 Difference]: Finished difference. Result has 316 places, 395 transitions, 6883 flow [2024-06-20 17:13:19,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6620, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6883, PETRI_PLACES=316, PETRI_TRANSITIONS=395} [2024-06-20 17:13:19,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 17:13:19,938 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 395 transitions, 6883 flow [2024-06-20 17:13:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:19,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:19,938 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, 1] [2024-06-20 17:13:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:13:19,939 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)] === [2024-06-20 17:13:19,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1754357912, now seen corresponding path program 9 times [2024-06-20 17:13:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:19,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835259261] [2024-06-20 17:13:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:23,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:23,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835259261] [2024-06-20 17:13:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835259261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:23,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:23,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588276705] [2024-06-20 17:13:23,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:23,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:23,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 395 transitions, 6883 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:23,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:23,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:23,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:25,053 INFO L124 PetriNetUnfolderBase]: 3074/4726 cut-off events. [2024-06-20 17:13:25,054 INFO L125 PetriNetUnfolderBase]: For 485078/485078 co-relation queries the response was YES. [2024-06-20 17:13:25,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39262 conditions, 4726 events. 3074/4726 cut-off events. For 485078/485078 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25910 event pairs, 713 based on Foata normal form. 2/4727 useless extension candidates. Maximal degree in co-relation 39115. Up to 3915 conditions per place. [2024-06-20 17:13:25,102 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 129 changer transitions 0/432 dead transitions. [2024-06-20 17:13:25,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 432 transitions, 8399 flow [2024-06-20 17:13:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:13:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:13:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-20 17:13:25,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 17:13:25,104 INFO L175 Difference]: Start difference. First operand has 316 places, 395 transitions, 6883 flow. Second operand 11 states and 168 transitions. [2024-06-20 17:13:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 432 transitions, 8399 flow [2024-06-20 17:13:26,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 432 transitions, 8202 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:13:26,360 INFO L231 Difference]: Finished difference. Result has 320 places, 407 transitions, 7327 flow [2024-06-20 17:13:26,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7327, PETRI_PLACES=320, PETRI_TRANSITIONS=407} [2024-06-20 17:13:26,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 17:13:26,360 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 407 transitions, 7327 flow [2024-06-20 17:13:26,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:26,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:26,361 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] [2024-06-20 17:13:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:13:26,361 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)] === [2024-06-20 17:13:26,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash -229121634, now seen corresponding path program 11 times [2024-06-20 17:13:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:26,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764376897] [2024-06-20 17:13:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:29,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:29,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764376897] [2024-06-20 17:13:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764376897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:29,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:29,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585516251] [2024-06-20 17:13:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:29,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:29,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 407 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:29,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:29,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:30,820 INFO L124 PetriNetUnfolderBase]: 3126/4778 cut-off events. [2024-06-20 17:13:30,821 INFO L125 PetriNetUnfolderBase]: For 519370/519370 co-relation queries the response was YES. [2024-06-20 17:13:30,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40595 conditions, 4778 events. 3126/4778 cut-off events. For 519370/519370 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26023 event pairs, 676 based on Foata normal form. 4/4781 useless extension candidates. Maximal degree in co-relation 40446. Up to 4212 conditions per place. [2024-06-20 17:13:30,874 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 322 selfloop transitions, 112 changer transitions 0/438 dead transitions. [2024-06-20 17:13:30,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 438 transitions, 8700 flow [2024-06-20 17:13:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:13:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:13:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 17:13:30,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 17:13:30,875 INFO L175 Difference]: Start difference. First operand has 320 places, 407 transitions, 7327 flow. Second operand 10 states and 158 transitions. [2024-06-20 17:13:30,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 438 transitions, 8700 flow [2024-06-20 17:13:31,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 438 transitions, 8443 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 17:13:31,942 INFO L231 Difference]: Finished difference. Result has 323 places, 413 transitions, 7435 flow [2024-06-20 17:13:31,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7435, PETRI_PLACES=323, PETRI_TRANSITIONS=413} [2024-06-20 17:13:31,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 17:13:31,943 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 413 transitions, 7435 flow [2024-06-20 17:13:31,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:31,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:31,943 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] [2024-06-20 17:13:31,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:13:31,943 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)] === [2024-06-20 17:13:31,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1931489432, now seen corresponding path program 10 times [2024-06-20 17:13:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:31,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218961195] [2024-06-20 17:13:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:35,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:35,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218961195] [2024-06-20 17:13:35,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218961195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:35,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:35,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268759249] [2024-06-20 17:13:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:35,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:35,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 413 transitions, 7435 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:35,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:35,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:35,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:37,225 INFO L124 PetriNetUnfolderBase]: 3120/4790 cut-off events. [2024-06-20 17:13:37,225 INFO L125 PetriNetUnfolderBase]: For 515780/515780 co-relation queries the response was YES. [2024-06-20 17:13:37,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40381 conditions, 4790 events. 3120/4790 cut-off events. For 515780/515780 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26252 event pairs, 681 based on Foata normal form. 2/4791 useless extension candidates. Maximal degree in co-relation 40231. Up to 3932 conditions per place. [2024-06-20 17:13:37,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 131 changer transitions 0/441 dead transitions. [2024-06-20 17:13:37,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 441 transitions, 8689 flow [2024-06-20 17:13:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:13:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:13:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 183 transitions. [2024-06-20 17:13:37,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-20 17:13:37,279 INFO L175 Difference]: Start difference. First operand has 323 places, 413 transitions, 7435 flow. Second operand 12 states and 183 transitions. [2024-06-20 17:13:37,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 441 transitions, 8689 flow [2024-06-20 17:13:38,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 441 transitions, 8514 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:38,461 INFO L231 Difference]: Finished difference. Result has 329 places, 413 transitions, 7528 flow [2024-06-20 17:13:38,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7528, PETRI_PLACES=329, PETRI_TRANSITIONS=413} [2024-06-20 17:13:38,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 17:13:38,462 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 413 transitions, 7528 flow [2024-06-20 17:13:38,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:38,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:38,462 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] [2024-06-20 17:13:38,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:13:38,462 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)] === [2024-06-20 17:13:38,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash -229358970, now seen corresponding path program 11 times [2024-06-20 17:13:38,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:38,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198987483] [2024-06-20 17:13:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:38,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198987483] [2024-06-20 17:13:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198987483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:41,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:41,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741682464] [2024-06-20 17:13:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:41,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:41,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:41,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:41,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 413 transitions, 7528 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:41,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:41,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:41,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:43,399 INFO L124 PetriNetUnfolderBase]: 3114/4782 cut-off events. [2024-06-20 17:13:43,400 INFO L125 PetriNetUnfolderBase]: For 525631/525631 co-relation queries the response was YES. [2024-06-20 17:13:43,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40362 conditions, 4782 events. 3114/4782 cut-off events. For 525631/525631 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26221 event pairs, 708 based on Foata normal form. 2/4783 useless extension candidates. Maximal degree in co-relation 40211. Up to 3929 conditions per place. [2024-06-20 17:13:43,448 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 137 changer transitions 0/437 dead transitions. [2024-06-20 17:13:43,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 437 transitions, 8770 flow [2024-06-20 17:13:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:13:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:13:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 17:13:43,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-20 17:13:43,450 INFO L175 Difference]: Start difference. First operand has 329 places, 413 transitions, 7528 flow. Second operand 10 states and 156 transitions. [2024-06-20 17:13:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 437 transitions, 8770 flow [2024-06-20 17:13:44,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 437 transitions, 8523 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 17:13:44,612 INFO L231 Difference]: Finished difference. Result has 329 places, 413 transitions, 7561 flow [2024-06-20 17:13:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7561, PETRI_PLACES=329, PETRI_TRANSITIONS=413} [2024-06-20 17:13:44,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 17:13:44,613 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 413 transitions, 7561 flow [2024-06-20 17:13:44,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:44,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:44,613 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] [2024-06-20 17:13:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:13:44,614 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)] === [2024-06-20 17:13:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 285095334, now seen corresponding path program 12 times [2024-06-20 17:13:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:44,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966076130] [2024-06-20 17:13:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966076130] [2024-06-20 17:13:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966076130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:48,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:48,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127670598] [2024-06-20 17:13:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:48,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:48,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:48,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:48,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 413 transitions, 7561 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:48,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:48,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:48,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:50,339 INFO L124 PetriNetUnfolderBase]: 3124/4800 cut-off events. [2024-06-20 17:13:50,339 INFO L125 PetriNetUnfolderBase]: For 543599/543599 co-relation queries the response was YES. [2024-06-20 17:13:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40640 conditions, 4800 events. 3124/4800 cut-off events. For 543599/543599 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26416 event pairs, 786 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 40489. Up to 4515 conditions per place. [2024-06-20 17:13:50,384 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 63 changer transitions 0/438 dead transitions. [2024-06-20 17:13:50,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 438 transitions, 8722 flow [2024-06-20 17:13:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:13:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:13:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 169 transitions. [2024-06-20 17:13:50,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3353174603174603 [2024-06-20 17:13:50,386 INFO L175 Difference]: Start difference. First operand has 329 places, 413 transitions, 7561 flow. Second operand 12 states and 169 transitions. [2024-06-20 17:13:50,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 438 transitions, 8722 flow [2024-06-20 17:13:51,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 438 transitions, 8323 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 17:13:51,522 INFO L231 Difference]: Finished difference. Result has 332 places, 416 transitions, 7375 flow [2024-06-20 17:13:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7173, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7375, PETRI_PLACES=332, PETRI_TRANSITIONS=416} [2024-06-20 17:13:51,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 17:13:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 416 transitions, 7375 flow [2024-06-20 17:13:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:51,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:51,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:13:51,523 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)] === [2024-06-20 17:13:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 292868460, now seen corresponding path program 12 times [2024-06-20 17:13:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324366974] [2024-06-20 17:13:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:54,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324366974] [2024-06-20 17:13:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324366974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:54,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283964418] [2024-06-20 17:13:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:54,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:54,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:54,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 416 transitions, 7375 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:54,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:54,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:54,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:55,603 INFO L124 PetriNetUnfolderBase]: 3112/4758 cut-off events. [2024-06-20 17:13:55,603 INFO L125 PetriNetUnfolderBase]: For 542859/542859 co-relation queries the response was YES. [2024-06-20 17:13:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39923 conditions, 4758 events. 3112/4758 cut-off events. For 542859/542859 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25883 event pairs, 671 based on Foata normal form. 4/4761 useless extension candidates. Maximal degree in co-relation 39771. Up to 4202 conditions per place. [2024-06-20 17:13:55,660 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 327 selfloop transitions, 109 changer transitions 0/440 dead transitions. [2024-06-20 17:13:55,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 440 transitions, 8631 flow [2024-06-20 17:13:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:13:55,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:13:55,661 INFO L175 Difference]: Start difference. First operand has 332 places, 416 transitions, 7375 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:13:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 440 transitions, 8631 flow [2024-06-20 17:13:56,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 440 transitions, 8302 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-20 17:13:56,915 INFO L231 Difference]: Finished difference. Result has 330 places, 416 transitions, 7270 flow [2024-06-20 17:13:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7046, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7270, PETRI_PLACES=330, PETRI_TRANSITIONS=416} [2024-06-20 17:13:56,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 17:13:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 416 transitions, 7270 flow [2024-06-20 17:13:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:56,916 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] [2024-06-20 17:13:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:13:56,916 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)] === [2024-06-20 17:13:56,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -242251374, now seen corresponding path program 13 times [2024-06-20 17:13:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124639431] [2024-06-20 17:13:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:59,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124639431] [2024-06-20 17:13:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124639431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:59,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:59,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146274767] [2024-06-20 17:13:59,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:59,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:59,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:13:59,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 416 transitions, 7270 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:13:59,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:59,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:13:59,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:02,100 INFO L124 PetriNetUnfolderBase]: 3322/5058 cut-off events. [2024-06-20 17:14:02,101 INFO L125 PetriNetUnfolderBase]: For 569277/569277 co-relation queries the response was YES. [2024-06-20 17:14:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43044 conditions, 5058 events. 3322/5058 cut-off events. For 569277/569277 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27707 event pairs, 763 based on Foata normal form. 4/5061 useless extension candidates. Maximal degree in co-relation 42893. Up to 4642 conditions per place. [2024-06-20 17:14:02,148 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 396 selfloop transitions, 98 changer transitions 0/498 dead transitions. [2024-06-20 17:14:02,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 498 transitions, 10152 flow [2024-06-20 17:14:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:14:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:14:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 183 transitions. [2024-06-20 17:14:02,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-20 17:14:02,150 INFO L175 Difference]: Start difference. First operand has 330 places, 416 transitions, 7270 flow. Second operand 12 states and 183 transitions. [2024-06-20 17:14:02,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 498 transitions, 10152 flow [2024-06-20 17:14:03,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 498 transitions, 9572 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 17:14:03,114 INFO L231 Difference]: Finished difference. Result has 334 places, 467 transitions, 8460 flow [2024-06-20 17:14:03,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8460, PETRI_PLACES=334, PETRI_TRANSITIONS=467} [2024-06-20 17:14:03,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 17:14:03,115 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 467 transitions, 8460 flow [2024-06-20 17:14:03,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:14:03,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:03,115 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] [2024-06-20 17:14:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:14:03,115 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)] === [2024-06-20 17:14:03,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 285106680, now seen corresponding path program 14 times [2024-06-20 17:14:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:03,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125726303] [2024-06-20 17:14:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:05,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:05,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125726303] [2024-06-20 17:14:05,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125726303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:05,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421539752] [2024-06-20 17:14:05,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:05,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:05,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:05,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:05,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 467 transitions, 8460 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:14:05,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:05,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:05,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:07,874 INFO L124 PetriNetUnfolderBase]: 3310/5053 cut-off events. [2024-06-20 17:14:07,874 INFO L125 PetriNetUnfolderBase]: For 558849/558849 co-relation queries the response was YES. [2024-06-20 17:14:07,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 5053 events. 3310/5053 cut-off events. For 558849/558849 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27806 event pairs, 760 based on Foata normal form. 4/5056 useless extension candidates. Maximal degree in co-relation 42402. Up to 4634 conditions per place. [2024-06-20 17:14:07,935 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 393 selfloop transitions, 95 changer transitions 0/492 dead transitions. [2024-06-20 17:14:07,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 492 transitions, 9710 flow [2024-06-20 17:14:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:14:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:14:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 17:14:07,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:14:07,936 INFO L175 Difference]: Start difference. First operand has 334 places, 467 transitions, 8460 flow. Second operand 10 states and 155 transitions. [2024-06-20 17:14:07,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 492 transitions, 9710 flow [2024-06-20 17:14:09,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 492 transitions, 9395 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-20 17:14:09,179 INFO L231 Difference]: Finished difference. Result has 336 places, 467 transitions, 8353 flow [2024-06-20 17:14:09,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8147, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8353, PETRI_PLACES=336, PETRI_TRANSITIONS=467} [2024-06-20 17:14:09,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 17:14:09,179 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 467 transitions, 8353 flow [2024-06-20 17:14:09,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:14:09,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:09,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:14:09,180 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)] === [2024-06-20 17:14:09,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -234899724, now seen corresponding path program 15 times [2024-06-20 17:14:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013349164] [2024-06-20 17:14:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:12,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:12,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013349164] [2024-06-20 17:14:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013349164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:12,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077844817] [2024-06-20 17:14:12,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:12,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:12,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 467 transitions, 8353 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:14:12,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:12,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:12,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:13,924 INFO L124 PetriNetUnfolderBase]: 3298/5038 cut-off events. [2024-06-20 17:14:13,924 INFO L125 PetriNetUnfolderBase]: For 552373/552373 co-relation queries the response was YES. [2024-06-20 17:14:13,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42045 conditions, 5038 events. 3298/5038 cut-off events. For 552373/552373 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27767 event pairs, 781 based on Foata normal form. 4/5041 useless extension candidates. Maximal degree in co-relation 41889. Up to 4776 conditions per place. [2024-06-20 17:14:13,971 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 419 selfloop transitions, 62 changer transitions 0/485 dead transitions. [2024-06-20 17:14:13,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 485 transitions, 9355 flow [2024-06-20 17:14:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-20 17:14:13,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 17:14:13,974 INFO L175 Difference]: Start difference. First operand has 336 places, 467 transitions, 8353 flow. Second operand 9 states and 135 transitions. [2024-06-20 17:14:13,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 485 transitions, 9355 flow [2024-06-20 17:14:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 485 transitions, 9159 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 17:14:15,231 INFO L231 Difference]: Finished difference. Result has 336 places, 467 transitions, 8287 flow [2024-06-20 17:14:15,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8157, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8287, PETRI_PLACES=336, PETRI_TRANSITIONS=467} [2024-06-20 17:14:15,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 17:14:15,231 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 467 transitions, 8287 flow [2024-06-20 17:14:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 17:14:15,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:15,232 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] [2024-06-20 17:14:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:14:15,232 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)] === [2024-06-20 17:14:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -242245980, now seen corresponding path program 13 times [2024-06-20 17:14:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:15,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316476133] [2024-06-20 17:14:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:18,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316476133] [2024-06-20 17:14:18,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316476133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:18,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:18,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371831761] [2024-06-20 17:14:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:18,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:18,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:18,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 467 transitions, 8287 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:18,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:18,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:18,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:20,771 INFO L124 PetriNetUnfolderBase]: 3292/5032 cut-off events. [2024-06-20 17:14:20,771 INFO L125 PetriNetUnfolderBase]: For 547605/547605 co-relation queries the response was YES. [2024-06-20 17:14:20,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41787 conditions, 5032 events. 3292/5032 cut-off events. For 547605/547605 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27739 event pairs, 784 based on Foata normal form. 2/5033 useless extension candidates. Maximal degree in co-relation 41630. Up to 4720 conditions per place. [2024-06-20 17:14:20,819 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 79 changer transitions 0/485 dead transitions. [2024-06-20 17:14:20,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 485 transitions, 9289 flow [2024-06-20 17:14:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:14:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:14:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-20 17:14:20,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-20 17:14:20,821 INFO L175 Difference]: Start difference. First operand has 336 places, 467 transitions, 8287 flow. Second operand 10 states and 147 transitions. [2024-06-20 17:14:20,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 485 transitions, 9289 flow [2024-06-20 17:14:22,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 485 transitions, 9105 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:14:22,042 INFO L231 Difference]: Finished difference. Result has 339 places, 467 transitions, 8267 flow [2024-06-20 17:14:22,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8267, PETRI_PLACES=339, PETRI_TRANSITIONS=467} [2024-06-20 17:14:22,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 17:14:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 467 transitions, 8267 flow [2024-06-20 17:14:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:22,043 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] [2024-06-20 17:14:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:14:22,043 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)] === [2024-06-20 17:14:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1527612662, now seen corresponding path program 1 times [2024-06-20 17:14:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:22,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047366366] [2024-06-20 17:14:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:25,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:25,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047366366] [2024-06-20 17:14:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047366366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:25,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980146831] [2024-06-20 17:14:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:25,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 467 transitions, 8267 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:25,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:25,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:25,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:27,292 INFO L124 PetriNetUnfolderBase]: 3412/5218 cut-off events. [2024-06-20 17:14:27,293 INFO L125 PetriNetUnfolderBase]: For 643475/643483 co-relation queries the response was YES. [2024-06-20 17:14:27,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44086 conditions, 5218 events. 3412/5218 cut-off events. For 643475/643483 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 28930 event pairs, 688 based on Foata normal form. 16/5234 useless extension candidates. Maximal degree in co-relation 43928. Up to 4637 conditions per place. [2024-06-20 17:14:27,347 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 458 selfloop transitions, 50 changer transitions 0/512 dead transitions. [2024-06-20 17:14:27,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 512 transitions, 9655 flow [2024-06-20 17:14:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:14:27,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:14:27,349 INFO L175 Difference]: Start difference. First operand has 339 places, 467 transitions, 8267 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:14:27,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 512 transitions, 9655 flow [2024-06-20 17:14:28,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 512 transitions, 9497 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:14:28,881 INFO L231 Difference]: Finished difference. Result has 340 places, 473 transitions, 8311 flow [2024-06-20 17:14:28,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8109, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8311, PETRI_PLACES=340, PETRI_TRANSITIONS=473} [2024-06-20 17:14:28,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 17:14:28,882 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 473 transitions, 8311 flow [2024-06-20 17:14:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:28,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:28,883 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] [2024-06-20 17:14:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:14:28,883 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)] === [2024-06-20 17:14:28,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1979471502, now seen corresponding path program 2 times [2024-06-20 17:14:28,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:28,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713495287] [2024-06-20 17:14:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713495287] [2024-06-20 17:14:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713495287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:32,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115092267] [2024-06-20 17:14:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:32,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:32,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 473 transitions, 8311 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:32,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:32,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:32,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:34,691 INFO L124 PetriNetUnfolderBase]: 3456/5296 cut-off events. [2024-06-20 17:14:34,691 INFO L125 PetriNetUnfolderBase]: For 675560/675568 co-relation queries the response was YES. [2024-06-20 17:14:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44871 conditions, 5296 events. 3456/5296 cut-off events. For 675560/675568 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29545 event pairs, 702 based on Foata normal form. 20/5316 useless extension candidates. Maximal degree in co-relation 44710. Up to 4929 conditions per place. [2024-06-20 17:14:34,753 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 47 changer transitions 0/503 dead transitions. [2024-06-20 17:14:34,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 503 transitions, 9406 flow [2024-06-20 17:14:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:14:34,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:14:34,755 INFO L175 Difference]: Start difference. First operand has 340 places, 473 transitions, 8311 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:14:34,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 503 transitions, 9406 flow [2024-06-20 17:14:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 503 transitions, 9333 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:36,566 INFO L231 Difference]: Finished difference. Result has 345 places, 474 transitions, 8356 flow [2024-06-20 17:14:36,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8238, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8356, PETRI_PLACES=345, PETRI_TRANSITIONS=474} [2024-06-20 17:14:36,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-20 17:14:36,567 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 474 transitions, 8356 flow [2024-06-20 17:14:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:36,567 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] [2024-06-20 17:14:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:14:36,567 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)] === [2024-06-20 17:14:36,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 490112088, now seen corresponding path program 3 times [2024-06-20 17:14:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127882169] [2024-06-20 17:14:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:40,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127882169] [2024-06-20 17:14:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127882169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:40,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:40,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110943990] [2024-06-20 17:14:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:40,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:40,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:40,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 474 transitions, 8356 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:42,015 INFO L124 PetriNetUnfolderBase]: 3484/5340 cut-off events. [2024-06-20 17:14:42,015 INFO L125 PetriNetUnfolderBase]: For 674242/674250 co-relation queries the response was YES. [2024-06-20 17:14:42,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45447 conditions, 5340 events. 3484/5340 cut-off events. For 674242/674250 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29870 event pairs, 702 based on Foata normal form. 16/5356 useless extension candidates. Maximal degree in co-relation 45284. Up to 4935 conditions per place. [2024-06-20 17:14:42,074 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 456 selfloop transitions, 49 changer transitions 0/509 dead transitions. [2024-06-20 17:14:42,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 509 transitions, 9508 flow [2024-06-20 17:14:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:14:42,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:14:42,075 INFO L175 Difference]: Start difference. First operand has 345 places, 474 transitions, 8356 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:14:42,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 509 transitions, 9508 flow [2024-06-20 17:14:43,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 509 transitions, 9411 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:43,549 INFO L231 Difference]: Finished difference. Result has 349 places, 477 transitions, 8415 flow [2024-06-20 17:14:43,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8415, PETRI_PLACES=349, PETRI_TRANSITIONS=477} [2024-06-20 17:14:43,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 17:14:43,550 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 477 transitions, 8415 flow [2024-06-20 17:14:43,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 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) [2024-06-20 17:14:43,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:43,550 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] [2024-06-20 17:14:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:14:43,551 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)] === [2024-06-20 17:14:43,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash 634157532, now seen corresponding path program 4 times [2024-06-20 17:14:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942540107] [2024-06-20 17:14:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:43,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:47,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942540107] [2024-06-20 17:14:47,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942540107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:47,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:14:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727618044] [2024-06-20 17:14:47,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:14:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:14:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:14:47,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:47,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 477 transitions, 8415 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:47,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:47,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:49,827 INFO L124 PetriNetUnfolderBase]: 3528/5409 cut-off events. [2024-06-20 17:14:49,827 INFO L125 PetriNetUnfolderBase]: For 705874/705884 co-relation queries the response was YES. [2024-06-20 17:14:49,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46022 conditions, 5409 events. 3528/5409 cut-off events. For 705874/705884 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30322 event pairs, 747 based on Foata normal form. 22/5431 useless extension candidates. Maximal degree in co-relation 45857. Up to 5041 conditions per place. [2024-06-20 17:14:49,894 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 51 changer transitions 0/513 dead transitions. [2024-06-20 17:14:49,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 513 transitions, 9546 flow [2024-06-20 17:14:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:14:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:14:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-20 17:14:49,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-20 17:14:49,896 INFO L175 Difference]: Start difference. First operand has 349 places, 477 transitions, 8415 flow. Second operand 11 states and 167 transitions. [2024-06-20 17:14:49,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 513 transitions, 9546 flow [2024-06-20 17:14:51,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 513 transitions, 9496 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:51,649 INFO L231 Difference]: Finished difference. Result has 357 places, 478 transitions, 8495 flow [2024-06-20 17:14:51,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8495, PETRI_PLACES=357, PETRI_TRANSITIONS=478} [2024-06-20 17:14:51,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-20 17:14:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 478 transitions, 8495 flow [2024-06-20 17:14:51,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:51,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:51,650 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] [2024-06-20 17:14:51,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:14:51,650 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)] === [2024-06-20 17:14:51,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash 895241116, now seen corresponding path program 5 times [2024-06-20 17:14:51,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967218465] [2024-06-20 17:14:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:51,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:55,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:55,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967218465] [2024-06-20 17:14:55,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967218465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:55,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:14:55,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331110173] [2024-06-20 17:14:55,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:55,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:14:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:14:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:14:55,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:14:55,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 478 transitions, 8495 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:55,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:55,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:14:55,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:57,826 INFO L124 PetriNetUnfolderBase]: 3546/5439 cut-off events. [2024-06-20 17:14:57,826 INFO L125 PetriNetUnfolderBase]: For 704087/704097 co-relation queries the response was YES. [2024-06-20 17:14:57,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46200 conditions, 5439 events. 3546/5439 cut-off events. For 704087/704097 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30527 event pairs, 745 based on Foata normal form. 22/5461 useless extension candidates. Maximal degree in co-relation 46033. Up to 5071 conditions per place. [2024-06-20 17:14:57,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 50 changer transitions 0/511 dead transitions. [2024-06-20 17:14:57,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 511 transitions, 9618 flow [2024-06-20 17:14:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:14:57,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:14:57,885 INFO L175 Difference]: Start difference. First operand has 357 places, 478 transitions, 8495 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:14:57,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 511 transitions, 9618 flow [2024-06-20 17:14:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 511 transitions, 9509 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:14:59,743 INFO L231 Difference]: Finished difference. Result has 358 places, 479 transitions, 8516 flow [2024-06-20 17:14:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8386, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8516, PETRI_PLACES=358, PETRI_TRANSITIONS=479} [2024-06-20 17:14:59,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-20 17:14:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 479 transitions, 8516 flow [2024-06-20 17:14:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:59,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:59,744 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] [2024-06-20 17:14:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:14:59,745 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)] === [2024-06-20 17:14:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 900962848, now seen corresponding path program 1 times [2024-06-20 17:14:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250141514] [2024-06-20 17:14:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250141514] [2024-06-20 17:15:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250141514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:03,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:15:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373377356] [2024-06-20 17:15:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:03,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:15:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:15:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:15:03,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:03,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 479 transitions, 8516 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:03,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:03,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:03,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:05,843 INFO L124 PetriNetUnfolderBase]: 3528/5413 cut-off events. [2024-06-20 17:15:05,843 INFO L125 PetriNetUnfolderBase]: For 665976/665986 co-relation queries the response was YES. [2024-06-20 17:15:05,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45395 conditions, 5413 events. 3528/5413 cut-off events. For 665976/665986 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30431 event pairs, 729 based on Foata normal form. 18/5431 useless extension candidates. Maximal degree in co-relation 45227. Up to 4955 conditions per place. [2024-06-20 17:15:05,912 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 55 changer transitions 0/516 dead transitions. [2024-06-20 17:15:05,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 516 transitions, 9640 flow [2024-06-20 17:15:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:15:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:15:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-20 17:15:05,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 17:15:05,914 INFO L175 Difference]: Start difference. First operand has 358 places, 479 transitions, 8516 flow. Second operand 11 states and 168 transitions. [2024-06-20 17:15:05,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 516 transitions, 9640 flow [2024-06-20 17:15:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 516 transitions, 9531 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:07,685 INFO L231 Difference]: Finished difference. Result has 363 places, 479 transitions, 8521 flow [2024-06-20 17:15:07,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8407, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8521, PETRI_PLACES=363, PETRI_TRANSITIONS=479} [2024-06-20 17:15:07,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 17:15:07,686 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 479 transitions, 8521 flow [2024-06-20 17:15:07,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:07,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:07,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:07,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:15:07,686 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)] === [2024-06-20 17:15:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1882423982, now seen corresponding path program 6 times [2024-06-20 17:15:07,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:07,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342616755] [2024-06-20 17:15:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342616755] [2024-06-20 17:15:11,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342616755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:11,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:11,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:15:11,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058715110] [2024-06-20 17:15:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:15:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:15:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:15:11,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:11,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 479 transitions, 8521 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:11,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:11,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:13,272 INFO L124 PetriNetUnfolderBase]: 3556/5453 cut-off events. [2024-06-20 17:15:13,272 INFO L125 PetriNetUnfolderBase]: For 678267/678277 co-relation queries the response was YES. [2024-06-20 17:15:13,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 5453 events. 3556/5453 cut-off events. For 678267/678277 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30630 event pairs, 733 based on Foata normal form. 18/5471 useless extension candidates. Maximal degree in co-relation 45545. Up to 4999 conditions per place. [2024-06-20 17:15:13,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 53 changer transitions 0/516 dead transitions. [2024-06-20 17:15:13,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 516 transitions, 9703 flow [2024-06-20 17:15:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:15:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:15:13,333 INFO L175 Difference]: Start difference. First operand has 363 places, 479 transitions, 8521 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:15:13,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 516 transitions, 9703 flow [2024-06-20 17:15:15,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 516 transitions, 9533 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 17:15:15,494 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 8530 flow [2024-06-20 17:15:15,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8530, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-20 17:15:15,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-20 17:15:15,496 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 8530 flow [2024-06-20 17:15:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:15,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:15,496 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] [2024-06-20 17:15:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:15:15,496 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)] === [2024-06-20 17:15:15,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -887873188, now seen corresponding path program 7 times [2024-06-20 17:15:15,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:15,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661819094] [2024-06-20 17:15:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:18,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661819094] [2024-06-20 17:15:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661819094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105618910] [2024-06-20 17:15:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:18,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:18,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:18,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:18,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:18,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 8530 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:18,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:18,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:18,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:21,027 INFO L124 PetriNetUnfolderBase]: 3600/5523 cut-off events. [2024-06-20 17:15:21,027 INFO L125 PetriNetUnfolderBase]: For 710591/710591 co-relation queries the response was YES. [2024-06-20 17:15:21,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45857 conditions, 5523 events. 3600/5523 cut-off events. For 710591/710591 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 31286 event pairs, 816 based on Foata normal form. 12/5535 useless extension candidates. Maximal degree in co-relation 45687. Up to 5261 conditions per place. [2024-06-20 17:15:21,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 29 changer transitions 0/510 dead transitions. [2024-06-20 17:15:21,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 510 transitions, 9632 flow [2024-06-20 17:15:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:15:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:15:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-20 17:15:21,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-20 17:15:21,124 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 8530 flow. Second operand 10 states and 146 transitions. [2024-06-20 17:15:21,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 510 transitions, 9632 flow [2024-06-20 17:15:23,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 510 transitions, 9541 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:23,482 INFO L231 Difference]: Finished difference. Result has 367 places, 483 transitions, 8520 flow [2024-06-20 17:15:23,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8439, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8520, PETRI_PLACES=367, PETRI_TRANSITIONS=483} [2024-06-20 17:15:23,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-20 17:15:23,483 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 483 transitions, 8520 flow [2024-06-20 17:15:23,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:23,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:23,483 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] [2024-06-20 17:15:23,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:15:23,484 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)] === [2024-06-20 17:15:23,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1862344668, now seen corresponding path program 2 times [2024-06-20 17:15:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244722386] [2024-06-20 17:15:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:26,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244722386] [2024-06-20 17:15:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244722386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:26,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:26,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219401042] [2024-06-20 17:15:26,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:26,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:27,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:27,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 483 transitions, 8520 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:27,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:27,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:27,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:29,111 INFO L124 PetriNetUnfolderBase]: 3582/5497 cut-off events. [2024-06-20 17:15:29,111 INFO L125 PetriNetUnfolderBase]: For 666966/666966 co-relation queries the response was YES. [2024-06-20 17:15:29,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45087 conditions, 5497 events. 3582/5497 cut-off events. For 666966/666966 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 31138 event pairs, 786 based on Foata normal form. 8/5505 useless extension candidates. Maximal degree in co-relation 44915. Up to 5089 conditions per place. [2024-06-20 17:15:29,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 36 changer transitions 0/513 dead transitions. [2024-06-20 17:15:29,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 513 transitions, 9814 flow [2024-06-20 17:15:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:15:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:15:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-20 17:15:29,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547619047619048 [2024-06-20 17:15:29,172 INFO L175 Difference]: Start difference. First operand has 367 places, 483 transitions, 8520 flow. Second operand 10 states and 149 transitions. [2024-06-20 17:15:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 513 transitions, 9814 flow [2024-06-20 17:15:31,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 513 transitions, 9751 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:15:31,176 INFO L231 Difference]: Finished difference. Result has 369 places, 483 transitions, 8535 flow [2024-06-20 17:15:31,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8457, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8535, PETRI_PLACES=369, PETRI_TRANSITIONS=483} [2024-06-20 17:15:31,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-20 17:15:31,177 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 483 transitions, 8535 flow [2024-06-20 17:15:31,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:31,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:31,177 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] [2024-06-20 17:15:31,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:15:31,177 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)] === [2024-06-20 17:15:31,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash 292883340, now seen corresponding path program 3 times [2024-06-20 17:15:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435622273] [2024-06-20 17:15:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:34,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435622273] [2024-06-20 17:15:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435622273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:34,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330313891] [2024-06-20 17:15:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:34,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:34,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 483 transitions, 8535 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:34,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:34,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:34,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:36,731 INFO L124 PetriNetUnfolderBase]: 3554/5449 cut-off events. [2024-06-20 17:15:36,731 INFO L125 PetriNetUnfolderBase]: For 641125/641125 co-relation queries the response was YES. [2024-06-20 17:15:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43836 conditions, 5449 events. 3554/5449 cut-off events. For 641125/641125 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 30773 event pairs, 774 based on Foata normal form. 12/5461 useless extension candidates. Maximal degree in co-relation 43663. Up to 5195 conditions per place. [2024-06-20 17:15:36,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 28 changer transitions 0/509 dead transitions. [2024-06-20 17:15:36,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 509 transitions, 9617 flow [2024-06-20 17:15:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:15:36,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-20 17:15:36,805 INFO L175 Difference]: Start difference. First operand has 369 places, 483 transitions, 8535 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:15:36,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 509 transitions, 9617 flow [2024-06-20 17:15:39,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 509 transitions, 9557 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:39,108 INFO L231 Difference]: Finished difference. Result has 372 places, 483 transitions, 8536 flow [2024-06-20 17:15:39,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8475, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8536, PETRI_PLACES=372, PETRI_TRANSITIONS=483} [2024-06-20 17:15:39,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-20 17:15:39,108 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 483 transitions, 8536 flow [2024-06-20 17:15:39,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:39,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:39,109 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] [2024-06-20 17:15:39,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:15:39,109 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)] === [2024-06-20 17:15:39,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash -234622956, now seen corresponding path program 8 times [2024-06-20 17:15:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:39,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241836498] [2024-06-20 17:15:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:42,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241836498] [2024-06-20 17:15:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241836498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:42,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:42,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:42,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193395817] [2024-06-20 17:15:42,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:42,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:42,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:42,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:42,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 483 transitions, 8536 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:42,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:42,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:42,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:44,456 INFO L124 PetriNetUnfolderBase]: 3536/5423 cut-off events. [2024-06-20 17:15:44,456 INFO L125 PetriNetUnfolderBase]: For 595416/595416 co-relation queries the response was YES. [2024-06-20 17:15:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42883 conditions, 5423 events. 3536/5423 cut-off events. For 595416/595416 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 30589 event pairs, 758 based on Foata normal form. 8/5431 useless extension candidates. Maximal degree in co-relation 42709. Up to 5079 conditions per place. [2024-06-20 17:15:44,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 31 changer transitions 0/514 dead transitions. [2024-06-20 17:15:44,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 514 transitions, 9702 flow [2024-06-20 17:15:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-20 17:15:44,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-20 17:15:44,512 INFO L175 Difference]: Start difference. First operand has 372 places, 483 transitions, 8536 flow. Second operand 9 states and 137 transitions. [2024-06-20 17:15:44,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 514 transitions, 9702 flow [2024-06-20 17:15:46,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 514 transitions, 9580 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 17:15:46,551 INFO L231 Difference]: Finished difference. Result has 372 places, 486 transitions, 8551 flow [2024-06-20 17:15:46,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8551, PETRI_PLACES=372, PETRI_TRANSITIONS=486} [2024-06-20 17:15:46,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-20 17:15:46,551 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 486 transitions, 8551 flow [2024-06-20 17:15:46,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:46,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:46,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:15:46,552 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)] === [2024-06-20 17:15:46,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 701324554, now seen corresponding path program 1 times [2024-06-20 17:15:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969146193] [2024-06-20 17:15:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969146193] [2024-06-20 17:15:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969146193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:49,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:49,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022760960] [2024-06-20 17:15:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:49,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:49,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:49,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 486 transitions, 8551 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:49,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:49,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:49,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:51,736 INFO L124 PetriNetUnfolderBase]: 3629/5559 cut-off events. [2024-06-20 17:15:51,736 INFO L125 PetriNetUnfolderBase]: For 645145/645145 co-relation queries the response was YES. [2024-06-20 17:15:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45134 conditions, 5559 events. 3629/5559 cut-off events. For 645145/645145 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31387 event pairs, 491 based on Foata normal form. 2/5560 useless extension candidates. Maximal degree in co-relation 44958. Up to 4364 conditions per place. [2024-06-20 17:15:51,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 112 changer transitions 0/527 dead transitions. [2024-06-20 17:15:51,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 527 transitions, 10247 flow [2024-06-20 17:15:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:15:51,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 17:15:51,812 INFO L175 Difference]: Start difference. First operand has 372 places, 486 transitions, 8551 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:15:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 527 transitions, 10247 flow [2024-06-20 17:15:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 527 transitions, 10186 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:53,884 INFO L231 Difference]: Finished difference. Result has 376 places, 491 transitions, 8854 flow [2024-06-20 17:15:53,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8494, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=376, PETRI_TRANSITIONS=491} [2024-06-20 17:15:53,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-20 17:15:53,885 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 491 transitions, 8854 flow [2024-06-20 17:15:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:53,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:53,885 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, 1] [2024-06-20 17:15:53,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:15:53,886 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)] === [2024-06-20 17:15:53,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:53,886 INFO L85 PathProgramCache]: Analyzing trace with hash -612154288, now seen corresponding path program 2 times [2024-06-20 17:15:53,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:53,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334619691] [2024-06-20 17:15:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:53,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334619691] [2024-06-20 17:15:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334619691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:57,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:57,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:15:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024822030] [2024-06-20 17:15:57,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:15:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:15:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:15:57,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:15:57,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 491 transitions, 8854 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:57,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:57,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:15:57,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:59,620 INFO L124 PetriNetUnfolderBase]: 3683/5641 cut-off events. [2024-06-20 17:15:59,621 INFO L125 PetriNetUnfolderBase]: For 685300/685300 co-relation queries the response was YES. [2024-06-20 17:15:59,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46903 conditions, 5641 events. 3683/5641 cut-off events. For 685300/685300 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31941 event pairs, 781 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 46724. Up to 5343 conditions per place. [2024-06-20 17:15:59,683 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 488 selfloop transitions, 27 changer transitions 0/519 dead transitions. [2024-06-20 17:15:59,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 519 transitions, 10216 flow [2024-06-20 17:15:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:15:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 17:15:59,684 INFO L175 Difference]: Start difference. First operand has 376 places, 491 transitions, 8854 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:15:59,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 519 transitions, 10216 flow [2024-06-20 17:16:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 519 transitions, 10031 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:02,126 INFO L231 Difference]: Finished difference. Result has 382 places, 494 transitions, 8810 flow [2024-06-20 17:16:02,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8810, PETRI_PLACES=382, PETRI_TRANSITIONS=494} [2024-06-20 17:16:02,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 17:16:02,126 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 494 transitions, 8810 flow [2024-06-20 17:16:02,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:02,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:02,127 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, 1] [2024-06-20 17:16:02,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:16:02,127 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)] === [2024-06-20 17:16:02,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1938933814, now seen corresponding path program 3 times [2024-06-20 17:16:02,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257291239] [2024-06-20 17:16:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257291239] [2024-06-20 17:16:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257291239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:16:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714593022] [2024-06-20 17:16:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:16:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:16:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:16:05,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:05,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 494 transitions, 8810 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:05,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:05,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:05,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:07,823 INFO L124 PetriNetUnfolderBase]: 3691/5653 cut-off events. [2024-06-20 17:16:07,823 INFO L125 PetriNetUnfolderBase]: For 696139/696139 co-relation queries the response was YES. [2024-06-20 17:16:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47104 conditions, 5653 events. 3691/5653 cut-off events. For 696139/696139 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32022 event pairs, 746 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 46922. Up to 5140 conditions per place. [2024-06-20 17:16:07,898 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 106 changer transitions 0/527 dead transitions. [2024-06-20 17:16:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 527 transitions, 10244 flow [2024-06-20 17:16:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:16:07,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:16:07,900 INFO L175 Difference]: Start difference. First operand has 382 places, 494 transitions, 8810 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:16:07,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 527 transitions, 10244 flow [2024-06-20 17:16:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 527 transitions, 10159 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:10,641 INFO L231 Difference]: Finished difference. Result has 385 places, 498 transitions, 9066 flow [2024-06-20 17:16:10,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8725, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9066, PETRI_PLACES=385, PETRI_TRANSITIONS=498} [2024-06-20 17:16:10,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-20 17:16:10,642 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 498 transitions, 9066 flow [2024-06-20 17:16:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:10,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:10,642 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, 1] [2024-06-20 17:16:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:16:10,642 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)] === [2024-06-20 17:16:10,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2136241232, now seen corresponding path program 4 times [2024-06-20 17:16:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610299511] [2024-06-20 17:16:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:14,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610299511] [2024-06-20 17:16:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610299511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:14,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:14,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:16:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532575914] [2024-06-20 17:16:14,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:14,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:16:14,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:16:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:16:14,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:14,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 498 transitions, 9066 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:14,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:14,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:14,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:16,657 INFO L124 PetriNetUnfolderBase]: 3699/5677 cut-off events. [2024-06-20 17:16:16,657 INFO L125 PetriNetUnfolderBase]: For 713657/713657 co-relation queries the response was YES. [2024-06-20 17:16:16,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47591 conditions, 5677 events. 3699/5677 cut-off events. For 713657/713657 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32263 event pairs, 758 based on Foata normal form. 2/5678 useless extension candidates. Maximal degree in co-relation 47408. Up to 5189 conditions per place. [2024-06-20 17:16:16,724 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 106 changer transitions 0/523 dead transitions. [2024-06-20 17:16:16,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 523 transitions, 10222 flow [2024-06-20 17:16:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:16:16,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:16:16,726 INFO L175 Difference]: Start difference. First operand has 385 places, 498 transitions, 9066 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:16:16,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 523 transitions, 10222 flow [2024-06-20 17:16:19,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 523 transitions, 9997 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:19,386 INFO L231 Difference]: Finished difference. Result has 389 places, 500 transitions, 9126 flow [2024-06-20 17:16:19,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8865, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9126, PETRI_PLACES=389, PETRI_TRANSITIONS=500} [2024-06-20 17:16:19,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-20 17:16:19,387 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 500 transitions, 9126 flow [2024-06-20 17:16:19,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:19,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:19,387 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, 1] [2024-06-20 17:16:19,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:16:19,387 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)] === [2024-06-20 17:16:19,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1934951886, now seen corresponding path program 5 times [2024-06-20 17:16:19,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:19,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367657239] [2024-06-20 17:16:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367657239] [2024-06-20 17:16:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367657239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:22,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:16:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644627220] [2024-06-20 17:16:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:16:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:16:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:16:22,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:22,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 500 transitions, 9126 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:22,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:22,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:22,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:24,731 INFO L124 PetriNetUnfolderBase]: 3740/5740 cut-off events. [2024-06-20 17:16:24,731 INFO L125 PetriNetUnfolderBase]: For 756495/756495 co-relation queries the response was YES. [2024-06-20 17:16:24,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48729 conditions, 5740 events. 3740/5740 cut-off events. For 756495/756495 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32750 event pairs, 918 based on Foata normal form. 2/5741 useless extension candidates. Maximal degree in co-relation 48544. Up to 5327 conditions per place. [2024-06-20 17:16:24,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 62 changer transitions 0/522 dead transitions. [2024-06-20 17:16:24,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 522 transitions, 10450 flow [2024-06-20 17:16:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:16:24,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:16:24,809 INFO L175 Difference]: Start difference. First operand has 389 places, 500 transitions, 9126 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:16:24,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 522 transitions, 10450 flow [2024-06-20 17:16:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 522 transitions, 10181 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:27,819 INFO L231 Difference]: Finished difference. Result has 392 places, 501 transitions, 9030 flow [2024-06-20 17:16:27,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9030, PETRI_PLACES=392, PETRI_TRANSITIONS=501} [2024-06-20 17:16:27,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:16:27,819 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 501 transitions, 9030 flow [2024-06-20 17:16:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:27,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:27,820 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, 1] [2024-06-20 17:16:27,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:16:27,820 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)] === [2024-06-20 17:16:27,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2091395224, now seen corresponding path program 6 times [2024-06-20 17:16:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954200247] [2024-06-20 17:16:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:31,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:31,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954200247] [2024-06-20 17:16:31,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954200247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:31,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:31,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:16:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098513287] [2024-06-20 17:16:31,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:31,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:16:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:31,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:16:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:16:31,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:31,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 501 transitions, 9030 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:31,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:31,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:31,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:33,338 INFO L124 PetriNetUnfolderBase]: 3735/5717 cut-off events. [2024-06-20 17:16:33,338 INFO L125 PetriNetUnfolderBase]: For 760401/760401 co-relation queries the response was YES. [2024-06-20 17:16:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48387 conditions, 5717 events. 3735/5717 cut-off events. For 760401/760401 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32492 event pairs, 911 based on Foata normal form. 2/5718 useless extension candidates. Maximal degree in co-relation 48200. Up to 5465 conditions per place. [2024-06-20 17:16:33,422 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 452 selfloop transitions, 60 changer transitions 0/516 dead transitions. [2024-06-20 17:16:33,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 516 transitions, 10088 flow [2024-06-20 17:16:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 17:16:33,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 17:16:33,424 INFO L175 Difference]: Start difference. First operand has 392 places, 501 transitions, 9030 flow. Second operand 8 states and 121 transitions. [2024-06-20 17:16:33,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 516 transitions, 10088 flow [2024-06-20 17:16:36,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 516 transitions, 9944 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:36,630 INFO L231 Difference]: Finished difference. Result has 394 places, 501 transitions, 9012 flow [2024-06-20 17:16:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8886, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9012, PETRI_PLACES=394, PETRI_TRANSITIONS=501} [2024-06-20 17:16:36,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 17:16:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 501 transitions, 9012 flow [2024-06-20 17:16:36,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:36,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:36,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:36,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:16:36,632 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)] === [2024-06-20 17:16:36,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1943790739, now seen corresponding path program 1 times [2024-06-20 17:16:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:36,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761800486] [2024-06-20 17:16:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:36,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761800486] [2024-06-20 17:16:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761800486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:40,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:40,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:16:40,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29996060] [2024-06-20 17:16:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:40,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:16:40,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:16:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:16:40,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:40,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 501 transitions, 9012 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:40,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:40,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:40,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:42,975 INFO L124 PetriNetUnfolderBase]: 3755/5757 cut-off events. [2024-06-20 17:16:42,975 INFO L125 PetriNetUnfolderBase]: For 782736/782736 co-relation queries the response was YES. [2024-06-20 17:16:43,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48644 conditions, 5757 events. 3755/5757 cut-off events. For 782736/782736 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32730 event pairs, 664 based on Foata normal form. 4/5760 useless extension candidates. Maximal degree in co-relation 48456. Up to 4922 conditions per place. [2024-06-20 17:16:43,053 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 355 selfloop transitions, 178 changer transitions 0/537 dead transitions. [2024-06-20 17:16:43,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 537 transitions, 10483 flow [2024-06-20 17:16:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:16:43,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:16:43,055 INFO L175 Difference]: Start difference. First operand has 394 places, 501 transitions, 9012 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:16:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 537 transitions, 10483 flow [2024-06-20 17:16:46,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 537 transitions, 10351 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:46,391 INFO L231 Difference]: Finished difference. Result has 398 places, 506 transitions, 9467 flow [2024-06-20 17:16:46,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8880, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9467, PETRI_PLACES=398, PETRI_TRANSITIONS=506} [2024-06-20 17:16:46,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-20 17:16:46,392 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 506 transitions, 9467 flow [2024-06-20 17:16:46,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:46,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:46,392 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, 1] [2024-06-20 17:16:46,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:16:46,392 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)] === [2024-06-20 17:16:46,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2136246347, now seen corresponding path program 2 times [2024-06-20 17:16:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:46,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877039735] [2024-06-20 17:16:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:46,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877039735] [2024-06-20 17:16:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877039735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:49,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:49,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:16:49,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037904305] [2024-06-20 17:16:49,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:49,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:16:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:16:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:16:49,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:49,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 506 transitions, 9467 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:49,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:49,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:49,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:52,864 INFO L124 PetriNetUnfolderBase]: 3775/5771 cut-off events. [2024-06-20 17:16:52,864 INFO L125 PetriNetUnfolderBase]: For 802155/802155 co-relation queries the response was YES. [2024-06-20 17:16:52,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50025 conditions, 5771 events. 3775/5771 cut-off events. For 802155/802155 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32685 event pairs, 670 based on Foata normal form. 4/5774 useless extension candidates. Maximal degree in co-relation 49834. Up to 4938 conditions per place. [2024-06-20 17:16:52,932 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 358 selfloop transitions, 181 changer transitions 0/543 dead transitions. [2024-06-20 17:16:52,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 543 transitions, 10928 flow [2024-06-20 17:16:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:16:52,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 17:16:52,933 INFO L175 Difference]: Start difference. First operand has 398 places, 506 transitions, 9467 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:16:52,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 543 transitions, 10928 flow [2024-06-20 17:16:56,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 543 transitions, 10539 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:56,185 INFO L231 Difference]: Finished difference. Result has 402 places, 510 transitions, 9579 flow [2024-06-20 17:16:56,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9084, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9579, PETRI_PLACES=402, PETRI_TRANSITIONS=510} [2024-06-20 17:16:56,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-20 17:16:56,186 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 510 transitions, 9579 flow [2024-06-20 17:16:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:56,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:56,186 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, 1] [2024-06-20 17:16:56,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:16:56,187 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)] === [2024-06-20 17:16:56,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2136251927, now seen corresponding path program 3 times [2024-06-20 17:16:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707744575] [2024-06-20 17:16:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:59,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:59,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707744575] [2024-06-20 17:16:59,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707744575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:59,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:16:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730882560] [2024-06-20 17:16:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:59,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:16:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:16:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:16:59,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:16:59,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 510 transitions, 9579 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:59,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:59,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:16:59,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:03,238 INFO L124 PetriNetUnfolderBase]: 3763/5759 cut-off events. [2024-06-20 17:17:03,238 INFO L125 PetriNetUnfolderBase]: For 793968/793968 co-relation queries the response was YES. [2024-06-20 17:17:03,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49663 conditions, 5759 events. 3763/5759 cut-off events. For 793968/793968 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32641 event pairs, 674 based on Foata normal form. 4/5762 useless extension candidates. Maximal degree in co-relation 49470. Up to 4930 conditions per place. [2024-06-20 17:17:03,303 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 184 changer transitions 0/545 dead transitions. [2024-06-20 17:17:03,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 545 transitions, 10739 flow [2024-06-20 17:17:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:17:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:17:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-20 17:17:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-20 17:17:03,305 INFO L175 Difference]: Start difference. First operand has 402 places, 510 transitions, 9579 flow. Second operand 12 states and 197 transitions. [2024-06-20 17:17:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 545 transitions, 10739 flow [2024-06-20 17:17:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 545 transitions, 10466 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:06,465 INFO L231 Difference]: Finished difference. Result has 409 places, 510 transitions, 9688 flow [2024-06-20 17:17:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9306, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9688, PETRI_PLACES=409, PETRI_TRANSITIONS=510} [2024-06-20 17:17:06,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-20 17:17:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 510 transitions, 9688 flow [2024-06-20 17:17:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:06,466 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, 1, 1] [2024-06-20 17:17:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:17:06,467 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)] === [2024-06-20 17:17:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1892085352, now seen corresponding path program 7 times [2024-06-20 17:17:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930217045] [2024-06-20 17:17:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:09,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:09,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930217045] [2024-06-20 17:17:09,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930217045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:09,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84927847] [2024-06-20 17:17:09,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:09,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:09,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 510 transitions, 9688 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:09,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:09,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:09,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:12,007 INFO L124 PetriNetUnfolderBase]: 3771/5783 cut-off events. [2024-06-20 17:17:12,007 INFO L125 PetriNetUnfolderBase]: For 802142/802154 co-relation queries the response was YES. [2024-06-20 17:17:12,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49972 conditions, 5783 events. 3771/5783 cut-off events. For 802142/802154 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32868 event pairs, 874 based on Foata normal form. 14/5796 useless extension candidates. Maximal degree in co-relation 49778. Up to 5075 conditions per place. [2024-06-20 17:17:12,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 146 changer transitions 0/543 dead transitions. [2024-06-20 17:17:12,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 543 transitions, 11164 flow [2024-06-20 17:17:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:17:12,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:17:12,089 INFO L175 Difference]: Start difference. First operand has 409 places, 510 transitions, 9688 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:17:12,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 543 transitions, 11164 flow [2024-06-20 17:17:15,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 543 transitions, 10638 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-20 17:17:15,768 INFO L231 Difference]: Finished difference. Result has 403 places, 514 transitions, 9579 flow [2024-06-20 17:17:15,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9162, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9579, PETRI_PLACES=403, PETRI_TRANSITIONS=514} [2024-06-20 17:17:15,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-20 17:17:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 514 transitions, 9579 flow [2024-06-20 17:17:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:15,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:15,769 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, 1] [2024-06-20 17:17:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:17:15,769 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)] === [2024-06-20 17:17:15,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1900656232, now seen corresponding path program 8 times [2024-06-20 17:17:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301764079] [2024-06-20 17:17:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:19,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301764079] [2024-06-20 17:17:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301764079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:19,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150099994] [2024-06-20 17:17:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:19,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:19,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 514 transitions, 9579 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:19,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:19,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:19,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:21,229 INFO L124 PetriNetUnfolderBase]: 3779/5795 cut-off events. [2024-06-20 17:17:21,230 INFO L125 PetriNetUnfolderBase]: For 811140/811152 co-relation queries the response was YES. [2024-06-20 17:17:21,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49855 conditions, 5795 events. 3779/5795 cut-off events. For 811140/811152 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32954 event pairs, 884 based on Foata normal form. 14/5808 useless extension candidates. Maximal degree in co-relation 49660. Up to 5126 conditions per place. [2024-06-20 17:17:21,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 143 changer transitions 0/539 dead transitions. [2024-06-20 17:17:21,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 539 transitions, 10765 flow [2024-06-20 17:17:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:17:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 17:17:21,309 INFO L175 Difference]: Start difference. First operand has 403 places, 514 transitions, 9579 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:17:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 539 transitions, 10765 flow [2024-06-20 17:17:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 539 transitions, 10488 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:25,010 INFO L231 Difference]: Finished difference. Result has 407 places, 516 transitions, 9659 flow [2024-06-20 17:17:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9326, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9659, PETRI_PLACES=407, PETRI_TRANSITIONS=516} [2024-06-20 17:17:25,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-20 17:17:25,011 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 516 transitions, 9659 flow [2024-06-20 17:17:25,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:25,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:25,011 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, 1] [2024-06-20 17:17:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:17:25,012 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)] === [2024-06-20 17:17:25,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2107423734, now seen corresponding path program 9 times [2024-06-20 17:17:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:25,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701885981] [2024-06-20 17:17:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:28,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701885981] [2024-06-20 17:17:28,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701885981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:28,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:28,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627963885] [2024-06-20 17:17:28,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:28,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:28,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 516 transitions, 9659 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:28,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:28,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:28,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:30,328 INFO L124 PetriNetUnfolderBase]: 3787/5803 cut-off events. [2024-06-20 17:17:30,329 INFO L125 PetriNetUnfolderBase]: For 823372/823384 co-relation queries the response was YES. [2024-06-20 17:17:30,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50237 conditions, 5803 events. 3787/5803 cut-off events. For 823372/823384 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33001 event pairs, 878 based on Foata normal form. 14/5816 useless extension candidates. Maximal degree in co-relation 50040. Up to 5138 conditions per place. [2024-06-20 17:17:30,396 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 142 changer transitions 0/537 dead transitions. [2024-06-20 17:17:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 537 transitions, 10811 flow [2024-06-20 17:17:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:17:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:17:30,398 INFO L175 Difference]: Start difference. First operand has 407 places, 516 transitions, 9659 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:17:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 537 transitions, 10811 flow [2024-06-20 17:17:33,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 537 transitions, 10498 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:33,724 INFO L231 Difference]: Finished difference. Result has 409 places, 518 transitions, 9681 flow [2024-06-20 17:17:33,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9346, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9681, PETRI_PLACES=409, PETRI_TRANSITIONS=518} [2024-06-20 17:17:33,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-20 17:17:33,725 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 518 transitions, 9681 flow [2024-06-20 17:17:33,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:33,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:33,725 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, 1] [2024-06-20 17:17:33,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:17:33,725 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)] === [2024-06-20 17:17:33,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash 623174248, now seen corresponding path program 10 times [2024-06-20 17:17:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:33,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659873071] [2024-06-20 17:17:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:37,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:37,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659873071] [2024-06-20 17:17:37,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659873071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:37,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:37,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044871935] [2024-06-20 17:17:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:37,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:37,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:37,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 518 transitions, 9681 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:37,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:37,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:37,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:39,338 INFO L124 PetriNetUnfolderBase]: 3782/5798 cut-off events. [2024-06-20 17:17:39,338 INFO L125 PetriNetUnfolderBase]: For 824267/824267 co-relation queries the response was YES. [2024-06-20 17:17:39,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 5798 events. 3782/5798 cut-off events. For 824267/824267 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33142 event pairs, 920 based on Foata normal form. 2/5799 useless extension candidates. Maximal degree in co-relation 49844. Up to 5490 conditions per place. [2024-06-20 17:17:39,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-20 17:17:39,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 534 transitions, 10777 flow [2024-06-20 17:17:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 17:17:39,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-20 17:17:39,566 INFO L175 Difference]: Start difference. First operand has 409 places, 518 transitions, 9681 flow. Second operand 9 states and 132 transitions. [2024-06-20 17:17:39,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 534 transitions, 10777 flow [2024-06-20 17:17:43,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 534 transitions, 10434 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:43,054 INFO L231 Difference]: Finished difference. Result has 412 places, 518 transitions, 9492 flow [2024-06-20 17:17:43,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9338, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9492, PETRI_PLACES=412, PETRI_TRANSITIONS=518} [2024-06-20 17:17:43,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-20 17:17:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 518 transitions, 9492 flow [2024-06-20 17:17:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:43,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:43,055 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, 1] [2024-06-20 17:17:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:17:43,055 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)] === [2024-06-20 17:17:43,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 341076895, now seen corresponding path program 4 times [2024-06-20 17:17:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913742026] [2024-06-20 17:17:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:43,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:46,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913742026] [2024-06-20 17:17:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913742026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:46,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:17:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753225124] [2024-06-20 17:17:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:17:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:17:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:17:46,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:46,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 518 transitions, 9492 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:46,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:46,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:46,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:49,778 INFO L124 PetriNetUnfolderBase]: 3898/5974 cut-off events. [2024-06-20 17:17:49,778 INFO L125 PetriNetUnfolderBase]: For 928600/928612 co-relation queries the response was YES. [2024-06-20 17:17:49,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52537 conditions, 5974 events. 3898/5974 cut-off events. For 928600/928612 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34214 event pairs, 739 based on Foata normal form. 16/5989 useless extension candidates. Maximal degree in co-relation 52338. Up to 4363 conditions per place. [2024-06-20 17:17:49,867 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 265 selfloop transitions, 304 changer transitions 0/573 dead transitions. [2024-06-20 17:17:49,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 573 transitions, 11481 flow [2024-06-20 17:17:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:17:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:17:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-20 17:17:49,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772893772893773 [2024-06-20 17:17:49,869 INFO L175 Difference]: Start difference. First operand has 412 places, 518 transitions, 9492 flow. Second operand 13 states and 206 transitions. [2024-06-20 17:17:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 573 transitions, 11481 flow [2024-06-20 17:17:54,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 573 transitions, 11314 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:17:54,595 INFO L231 Difference]: Finished difference. Result has 417 places, 530 transitions, 10250 flow [2024-06-20 17:17:54,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9325, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10250, PETRI_PLACES=417, PETRI_TRANSITIONS=530} [2024-06-20 17:17:54,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-20 17:17:54,596 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 530 transitions, 10250 flow [2024-06-20 17:17:54,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:54,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:54,596 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, 1] [2024-06-20 17:17:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:17:54,598 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)] === [2024-06-20 17:17:54,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1900661347, now seen corresponding path program 5 times [2024-06-20 17:17:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:54,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359358699] [2024-06-20 17:17:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:54,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359358699] [2024-06-20 17:17:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359358699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:58,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:58,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:17:58,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083622655] [2024-06-20 17:17:58,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:58,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:17:58,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:17:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:17:58,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:17:58,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 530 transitions, 10250 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:58,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:58,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:17:58,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:01,465 INFO L124 PetriNetUnfolderBase]: 3950/6048 cut-off events. [2024-06-20 17:18:01,466 INFO L125 PetriNetUnfolderBase]: For 977908/977920 co-relation queries the response was YES. [2024-06-20 17:18:01,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54778 conditions, 6048 events. 3950/6048 cut-off events. For 977908/977920 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34683 event pairs, 765 based on Foata normal form. 16/6063 useless extension candidates. Maximal degree in co-relation 54578. Up to 4403 conditions per place. [2024-06-20 17:18:01,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 310 changer transitions 0/576 dead transitions. [2024-06-20 17:18:01,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 576 transitions, 12090 flow [2024-06-20 17:18:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:18:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:18:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 212 transitions. [2024-06-20 17:18:01,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-20 17:18:01,552 INFO L175 Difference]: Start difference. First operand has 417 places, 530 transitions, 10250 flow. Second operand 14 states and 212 transitions. [2024-06-20 17:18:01,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 576 transitions, 12090 flow [2024-06-20 17:18:05,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 576 transitions, 11290 flow, removed 90 selfloop flow, removed 10 redundant places. [2024-06-20 17:18:05,494 INFO L231 Difference]: Finished difference. Result has 421 places, 536 transitions, 10236 flow [2024-06-20 17:18:05,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9514, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10236, PETRI_PLACES=421, PETRI_TRANSITIONS=536} [2024-06-20 17:18:05,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-20 17:18:05,495 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 536 transitions, 10236 flow [2024-06-20 17:18:05,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:05,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:05,496 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, 1] [2024-06-20 17:18:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:18:05,496 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)] === [2024-06-20 17:18:05,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1721891829, now seen corresponding path program 6 times [2024-06-20 17:18:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300836449] [2024-06-20 17:18:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:09,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300836449] [2024-06-20 17:18:09,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300836449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:09,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:09,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:09,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620125987] [2024-06-20 17:18:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:09,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:09,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:18:09,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 536 transitions, 10236 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:09,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:09,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:18:09,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:12,161 INFO L124 PetriNetUnfolderBase]: 3970/6069 cut-off events. [2024-06-20 17:18:12,161 INFO L125 PetriNetUnfolderBase]: For 988809/988844 co-relation queries the response was YES. [2024-06-20 17:18:12,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54642 conditions, 6069 events. 3970/6069 cut-off events. For 988809/988844 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34724 event pairs, 656 based on Foata normal form. 27/6095 useless extension candidates. Maximal degree in co-relation 54441. Up to 4419 conditions per place. [2024-06-20 17:18:12,231 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 311 changer transitions 0/575 dead transitions. [2024-06-20 17:18:12,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 575 transitions, 11990 flow [2024-06-20 17:18:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:18:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:18:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-20 17:18:12,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-20 17:18:12,233 INFO L175 Difference]: Start difference. First operand has 421 places, 536 transitions, 10236 flow. Second operand 11 states and 178 transitions. [2024-06-20 17:18:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 575 transitions, 11990 flow [2024-06-20 17:18:16,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 575 transitions, 11484 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-20 17:18:16,026 INFO L231 Difference]: Finished difference. Result has 422 places, 539 transitions, 10438 flow [2024-06-20 17:18:16,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9733, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10438, PETRI_PLACES=422, PETRI_TRANSITIONS=539} [2024-06-20 17:18:16,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-20 17:18:16,027 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 539 transitions, 10438 flow [2024-06-20 17:18:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:16,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:16,027 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, 1] [2024-06-20 17:18:16,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:18:16,027 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)] === [2024-06-20 17:18:16,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash -661335091, now seen corresponding path program 7 times [2024-06-20 17:18:16,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:16,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047027621] [2024-06-20 17:18:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:19,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:19,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047027621] [2024-06-20 17:18:19,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047027621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:19,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:19,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:18:19,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310465583] [2024-06-20 17:18:19,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:19,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:18:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:19,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:18:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:18:19,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:18:19,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 539 transitions, 10438 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:19,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:19,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:18:19,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:23,023 INFO L124 PetriNetUnfolderBase]: 3958/6056 cut-off events. [2024-06-20 17:18:23,023 INFO L125 PetriNetUnfolderBase]: For 984092/984104 co-relation queries the response was YES. [2024-06-20 17:18:23,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54400 conditions, 6056 events. 3958/6056 cut-off events. For 984092/984104 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34744 event pairs, 761 based on Foata normal form. 16/6071 useless extension candidates. Maximal degree in co-relation 54198. Up to 4411 conditions per place. [2024-06-20 17:18:23,109 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 261 selfloop transitions, 313 changer transitions 0/578 dead transitions. [2024-06-20 17:18:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 578 transitions, 11900 flow [2024-06-20 17:18:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:18:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:18:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-06-20 17:18:23,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358843537414966 [2024-06-20 17:18:23,111 INFO L175 Difference]: Start difference. First operand has 422 places, 539 transitions, 10438 flow. Second operand 14 states and 211 transitions. [2024-06-20 17:18:23,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 578 transitions, 11900 flow [2024-06-20 17:18:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 578 transitions, 10909 flow, removed 70 selfloop flow, removed 10 redundant places. [2024-06-20 17:18:27,504 INFO L231 Difference]: Finished difference. Result has 426 places, 539 transitions, 10079 flow [2024-06-20 17:18:27,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9447, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10079, PETRI_PLACES=426, PETRI_TRANSITIONS=539} [2024-06-20 17:18:27,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-20 17:18:27,505 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 539 transitions, 10079 flow [2024-06-20 17:18:27,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:27,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:27,505 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, 1] [2024-06-20 17:18:27,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:18:27,505 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)] === [2024-06-20 17:18:27,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1733545867, now seen corresponding path program 8 times [2024-06-20 17:18:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:27,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16586464] [2024-06-20 17:18:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16586464] [2024-06-20 17:18:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16586464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:31,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828308979] [2024-06-20 17:18:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:31,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:18:31,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 539 transitions, 10079 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:31,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:31,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:18:31,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:34,507 INFO L124 PetriNetUnfolderBase]: 4010/6131 cut-off events. [2024-06-20 17:18:34,507 INFO L125 PetriNetUnfolderBase]: For 1019955/1019990 co-relation queries the response was YES. [2024-06-20 17:18:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54435 conditions, 6131 events. 4010/6131 cut-off events. For 1019955/1019990 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35129 event pairs, 661 based on Foata normal form. 27/6157 useless extension candidates. Maximal degree in co-relation 54233. Up to 4451 conditions per place. [2024-06-20 17:18:34,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 303 changer transitions 0/580 dead transitions. [2024-06-20 17:18:34,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 580 transitions, 11881 flow [2024-06-20 17:18:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:18:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:18:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-20 17:18:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-20 17:18:34,579 INFO L175 Difference]: Start difference. First operand has 426 places, 539 transitions, 10079 flow. Second operand 12 states and 190 transitions. [2024-06-20 17:18:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 580 transitions, 11881 flow [2024-06-20 17:18:39,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 580 transitions, 11397 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 17:18:39,277 INFO L231 Difference]: Finished difference. Result has 426 places, 545 transitions, 10321 flow [2024-06-20 17:18:39,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9601, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10321, PETRI_PLACES=426, PETRI_TRANSITIONS=545} [2024-06-20 17:18:39,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-20 17:18:39,278 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 545 transitions, 10321 flow [2024-06-20 17:18:39,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:39,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:39,278 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, 1] [2024-06-20 17:18:39,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:18:39,279 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:39,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash -430581235, now seen corresponding path program 9 times [2024-06-20 17:18:39,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:39,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113470956] [2024-06-20 17:18:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:42,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:42,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113470956] [2024-06-20 17:18:42,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113470956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:42,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883437399] [2024-06-20 17:18:42,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:42,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:18:42,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 545 transitions, 10321 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:42,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:42,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:18:42,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:45,388 INFO L124 PetriNetUnfolderBase]: 3998/6117 cut-off events. [2024-06-20 17:18:45,388 INFO L125 PetriNetUnfolderBase]: For 1013403/1013438 co-relation queries the response was YES. [2024-06-20 17:18:45,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54164 conditions, 6117 events. 3998/6117 cut-off events. For 1013403/1013438 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35100 event pairs, 663 based on Foata normal form. 27/6143 useless extension candidates. Maximal degree in co-relation 53961. Up to 4443 conditions per place. [2024-06-20 17:18:45,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 301 changer transitions 0/574 dead transitions. [2024-06-20 17:18:45,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 574 transitions, 11757 flow [2024-06-20 17:18:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:18:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:18:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 17:18:45,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 17:18:45,464 INFO L175 Difference]: Start difference. First operand has 426 places, 545 transitions, 10321 flow. Second operand 10 states and 164 transitions. [2024-06-20 17:18:45,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 574 transitions, 11757 flow [2024-06-20 17:18:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 574 transitions, 11229 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:50,270 INFO L231 Difference]: Finished difference. Result has 428 places, 545 transitions, 10402 flow [2024-06-20 17:18:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9793, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10402, PETRI_PLACES=428, PETRI_TRANSITIONS=545} [2024-06-20 17:18:50,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 17:18:50,270 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 545 transitions, 10402 flow [2024-06-20 17:18:50,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:50,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:50,271 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, 1] [2024-06-20 17:18:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:18:50,271 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:50,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -346383430, now seen corresponding path program 1 times [2024-06-20 17:18:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:50,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12587782] [2024-06-20 17:18:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:53,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12587782] [2024-06-20 17:18:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12587782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:53,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:18:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035307701] [2024-06-20 17:18:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:53,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:18:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:18:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:18:53,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:18:53,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 545 transitions, 10402 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:53,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:53,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:18:53,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:56,918 INFO L124 PetriNetUnfolderBase]: 4006/6137 cut-off events. [2024-06-20 17:18:56,918 INFO L125 PetriNetUnfolderBase]: For 1020565/1020581 co-relation queries the response was YES. [2024-06-20 17:18:56,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54493 conditions, 6137 events. 4006/6137 cut-off events. For 1020565/1020581 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35320 event pairs, 746 based on Foata normal form. 18/6155 useless extension candidates. Maximal degree in co-relation 54289. Up to 5329 conditions per place. [2024-06-20 17:18:56,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 170 changer transitions 0/572 dead transitions. [2024-06-20 17:18:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 572 transitions, 11654 flow [2024-06-20 17:18:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:18:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:18:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-20 17:18:57,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:18:57,001 INFO L175 Difference]: Start difference. First operand has 428 places, 545 transitions, 10402 flow. Second operand 10 states and 154 transitions. [2024-06-20 17:18:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 572 transitions, 11654 flow [2024-06-20 17:19:01,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 572 transitions, 11052 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:19:01,137 INFO L231 Difference]: Finished difference. Result has 429 places, 547 transitions, 10213 flow [2024-06-20 17:19:01,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9800, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10213, PETRI_PLACES=429, PETRI_TRANSITIONS=547} [2024-06-20 17:19:01,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-20 17:19:01,138 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 547 transitions, 10213 flow [2024-06-20 17:19:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:01,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:01,138 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, 1] [2024-06-20 17:19:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:19:01,138 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:01,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2107061499, now seen corresponding path program 10 times [2024-06-20 17:19:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:01,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76906627] [2024-06-20 17:19:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:04,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:04,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76906627] [2024-06-20 17:19:04,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76906627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:04,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:04,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:04,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039377763] [2024-06-20 17:19:04,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:04,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:04,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:04,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:04,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:19:04,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 547 transitions, 10213 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:04,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:04,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:19:04,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:08,404 INFO L124 PetriNetUnfolderBase]: 4058/6208 cut-off events. [2024-06-20 17:19:08,405 INFO L125 PetriNetUnfolderBase]: For 1078332/1078344 co-relation queries the response was YES. [2024-06-20 17:19:08,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55163 conditions, 6208 events. 4058/6208 cut-off events. For 1078332/1078344 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35703 event pairs, 761 based on Foata normal form. 16/6223 useless extension candidates. Maximal degree in co-relation 54958. Up to 4495 conditions per place. [2024-06-20 17:19:08,488 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 317 changer transitions 0/590 dead transitions. [2024-06-20 17:19:08,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 590 transitions, 12287 flow [2024-06-20 17:19:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:19:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:19:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-20 17:19:08,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:19:08,504 INFO L175 Difference]: Start difference. First operand has 429 places, 547 transitions, 10213 flow. Second operand 13 states and 208 transitions. [2024-06-20 17:19:08,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 590 transitions, 12287 flow [2024-06-20 17:19:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 590 transitions, 11901 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:13,660 INFO L231 Difference]: Finished difference. Result has 435 places, 553 transitions, 10588 flow [2024-06-20 17:19:13,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9833, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10588, PETRI_PLACES=435, PETRI_TRANSITIONS=553} [2024-06-20 17:19:13,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-20 17:19:13,665 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 553 transitions, 10588 flow [2024-06-20 17:19:13,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:13,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:13,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:13,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:19:13,666 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:13,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2107418619, now seen corresponding path program 11 times [2024-06-20 17:19:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:13,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914930952] [2024-06-20 17:19:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:17,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:17,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914930952] [2024-06-20 17:19:17,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914930952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:17,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:17,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:17,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442935657] [2024-06-20 17:19:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:17,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:17,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:19:17,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 553 transitions, 10588 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:17,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:19:17,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:21,094 INFO L124 PetriNetUnfolderBase]: 4046/6204 cut-off events. [2024-06-20 17:19:21,094 INFO L125 PetriNetUnfolderBase]: For 1052005/1052017 co-relation queries the response was YES. [2024-06-20 17:19:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55082 conditions, 6204 events. 4046/6204 cut-off events. For 1052005/1052017 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35880 event pairs, 781 based on Foata normal form. 16/6219 useless extension candidates. Maximal degree in co-relation 54876. Up to 4487 conditions per place. [2024-06-20 17:19:21,184 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 319 changer transitions 0/589 dead transitions. [2024-06-20 17:19:21,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 589 transitions, 12308 flow [2024-06-20 17:19:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:19:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:19:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-06-20 17:19:21,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358843537414966 [2024-06-20 17:19:21,186 INFO L175 Difference]: Start difference. First operand has 435 places, 553 transitions, 10588 flow. Second operand 14 states and 211 transitions. [2024-06-20 17:19:21,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 589 transitions, 12308 flow [2024-06-20 17:19:26,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 589 transitions, 11759 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 17:19:26,455 INFO L231 Difference]: Finished difference. Result has 440 places, 553 transitions, 10683 flow [2024-06-20 17:19:26,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10039, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10683, PETRI_PLACES=440, PETRI_TRANSITIONS=553} [2024-06-20 17:19:26,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-20 17:19:26,456 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 553 transitions, 10683 flow [2024-06-20 17:19:26,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:26,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:26,456 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, 1] [2024-06-20 17:19:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:19:26,456 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:26,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash -324539605, now seen corresponding path program 12 times [2024-06-20 17:19:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:26,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341494625] [2024-06-20 17:19:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:30,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:30,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341494625] [2024-06-20 17:19:30,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341494625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:30,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:30,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:30,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718223193] [2024-06-20 17:19:30,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:30,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:30,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:19:30,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 553 transitions, 10683 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:30,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:30,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:19:30,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:33,712 INFO L124 PetriNetUnfolderBase]: 4066/6232 cut-off events. [2024-06-20 17:19:33,713 INFO L125 PetriNetUnfolderBase]: For 1071655/1071667 co-relation queries the response was YES. [2024-06-20 17:19:33,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55405 conditions, 6232 events. 4066/6232 cut-off events. For 1071655/1071667 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36041 event pairs, 763 based on Foata normal form. 16/6247 useless extension candidates. Maximal degree in co-relation 55198. Up to 4503 conditions per place. [2024-06-20 17:19:33,800 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 320 changer transitions 0/593 dead transitions. [2024-06-20 17:19:33,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 593 transitions, 12709 flow [2024-06-20 17:19:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:19:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:19:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-20 17:19:33,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:19:33,802 INFO L175 Difference]: Start difference. First operand has 440 places, 553 transitions, 10683 flow. Second operand 13 states and 208 transitions. [2024-06-20 17:19:33,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 593 transitions, 12709 flow [2024-06-20 17:19:39,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 593 transitions, 11707 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-06-20 17:19:39,033 INFO L231 Difference]: Finished difference. Result has 438 places, 556 transitions, 10382 flow [2024-06-20 17:19:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10382, PETRI_PLACES=438, PETRI_TRANSITIONS=556} [2024-06-20 17:19:39,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-20 17:19:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 556 transitions, 10382 flow [2024-06-20 17:19:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:39,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:39,034 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, 1] [2024-06-20 17:19:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:19:39,034 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:39,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2107245639, now seen corresponding path program 13 times [2024-06-20 17:19:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96159383] [2024-06-20 17:19:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:42,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:42,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96159383] [2024-06-20 17:19:42,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96159383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:42,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252513795] [2024-06-20 17:19:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:42,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:19:42,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 556 transitions, 10382 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:42,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:42,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:19:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:46,050 INFO L124 PetriNetUnfolderBase]: 4054/6212 cut-off events. [2024-06-20 17:19:46,050 INFO L125 PetriNetUnfolderBase]: For 1049617/1049629 co-relation queries the response was YES. [2024-06-20 17:19:46,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54538 conditions, 6212 events. 4054/6212 cut-off events. For 1049617/1049629 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35885 event pairs, 753 based on Foata normal form. 16/6227 useless extension candidates. Maximal degree in co-relation 54330. Up to 4495 conditions per place. [2024-06-20 17:19:46,138 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 324 changer transitions 0/594 dead transitions. [2024-06-20 17:19:46,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 594 transitions, 12124 flow [2024-06-20 17:19:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:19:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:19:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 217 transitions. [2024-06-20 17:19:46,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:19:46,140 INFO L175 Difference]: Start difference. First operand has 438 places, 556 transitions, 10382 flow. Second operand 14 states and 217 transitions. [2024-06-20 17:19:46,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 594 transitions, 12124 flow [2024-06-20 17:19:51,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 594 transitions, 11580 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 17:19:51,322 INFO L231 Difference]: Finished difference. Result has 442 places, 556 transitions, 10492 flow [2024-06-20 17:19:51,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9838, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10492, PETRI_PLACES=442, PETRI_TRANSITIONS=556} [2024-06-20 17:19:51,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-20 17:19:51,323 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 556 transitions, 10492 flow [2024-06-20 17:19:51,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:51,324 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, 1] [2024-06-20 17:19:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:19:51,324 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:51,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 631688875, now seen corresponding path program 14 times [2024-06-20 17:19:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:51,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046583431] [2024-06-20 17:19:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:55,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:55,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046583431] [2024-06-20 17:19:55,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046583431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361116383] [2024-06-20 17:19:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:55,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:55,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:55,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 17:19:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 556 transitions, 10492 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 17:19:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:59,335 INFO L124 PetriNetUnfolderBase]: 4074/6236 cut-off events. [2024-06-20 17:19:59,335 INFO L125 PetriNetUnfolderBase]: For 1070633/1070645 co-relation queries the response was YES. [2024-06-20 17:19:59,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54965 conditions, 6236 events. 4074/6236 cut-off events. For 1070633/1070645 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36023 event pairs, 777 based on Foata normal form. 16/6251 useless extension candidates. Maximal degree in co-relation 54756. Up to 4511 conditions per place. [2024-06-20 17:19:59,412 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 325 changer transitions 0/600 dead transitions. [2024-06-20 17:19:59,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 600 transitions, 12304 flow [2024-06-20 17:19:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-20 17:19:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-20 17:19:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 236 transitions. [2024-06-20 17:19:59,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-20 17:19:59,414 INFO L175 Difference]: Start difference. First operand has 442 places, 556 transitions, 10492 flow. Second operand 16 states and 236 transitions. [2024-06-20 17:19:59,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 600 transitions, 12304 flow Killed by 15