./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe008_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe008_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:00:15,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:00:15,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:00:15,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:00:15,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:00:15,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:00:15,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:00:15,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:00:15,578 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:00:15,581 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:00:15,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:00:15,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:00:15,582 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:00:15,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:00:15,583 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:00:15,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:00:15,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:00:15,584 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:00:15,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:00:15,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:00:15,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:00:15,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:00:15,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:00:15,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:00:15,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:00:15,586 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:00:15,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:00:15,587 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:00:15,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:00:15,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:00:15,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:00:15,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:00:15,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:00:15,589 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:00:15,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:00:15,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:00:15,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:00:15,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:00:15,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:00:15,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:00:15,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:00:15,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:00:15,590 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:00:15,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:00:15,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:00:15,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:00:15,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:00:15,839 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:00:15,839 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:00:15,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-14 13:00:16,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:00:17,061 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:00:17,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-14 13:00:17,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6204494bf/77cc952d837940ed9bb014a22b0210c0/FLAGbbdaa48a9 [2024-06-14 13:00:17,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6204494bf/77cc952d837940ed9bb014a22b0210c0 [2024-06-14 13:00:17,091 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:00:17,092 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:00:17,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe008_power.opt.yml/witness.yml [2024-06-14 13:00:17,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:00:17,273 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:00:17,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:00:17,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:00:17,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:00:17,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:00:17" (1/2) ... [2024-06-14 13:00:17,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1781851b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:00:17, skipping insertion in model container [2024-06-14 13:00:17,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:00:17" (1/2) ... [2024-06-14 13:00:17,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f521eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:00:17, skipping insertion in model container [2024-06-14 13:00:17,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:17" (2/2) ... [2024-06-14 13:00:17,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1781851b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17, skipping insertion in model container [2024-06-14 13:00:17,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:17" (2/2) ... [2024-06-14 13:00:17,283 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:00:17,393 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:00:17,394 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 13:00:17,394 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 13:00:17,394 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 13:00:17,394 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:00:17,395 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 13:00:17,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:00:17,700 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:00:17,709 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:00:17,823 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:00:17,857 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:00:17,857 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17 WrapperNode [2024-06-14 13:00:17,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:00:17,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:00:17,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:00:17,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:00:17,867 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 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,886 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 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,914 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-14 13:00:17,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:00:17,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:00:17,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:00:17,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:00:17,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,928 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,962 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-14 13:00:17,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:17,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:18,005 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:18,016 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:18,018 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:18,022 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:00:18,028 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:00:18,028 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:00:18,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:00:18,036 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (1/1) ... [2024-06-14 13:00:18,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:00:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:00:18,058 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) [2024-06-14 13:00:18,080 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 [2024-06-14 13:00:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:00:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:00:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:00:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:00:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:00:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:00:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:00:18,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:00:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:00:18,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:00:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:00:18,093 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:00:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:00:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:00:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:00:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:00:18,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:00:18,097 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:00:18,253 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:00:18,255 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:00:18,739 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:00:18,739 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:00:19,060 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:00:19,060 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:00:19,061 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:00:19 BoogieIcfgContainer [2024-06-14 13:00:19,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:00:19,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:00:19,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:00:19,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:00:19,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:00:17" (1/4) ... [2024-06-14 13:00:19,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf1f84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:00:19, skipping insertion in model container [2024-06-14 13:00:19,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:17" (2/4) ... [2024-06-14 13:00:19,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf1f84c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:00:19, skipping insertion in model container [2024-06-14 13:00:19,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:17" (3/4) ... [2024-06-14 13:00:19,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf1f84c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:00:19, skipping insertion in model container [2024-06-14 13:00:19,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:00:19" (4/4) ... [2024-06-14 13:00:19,068 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.opt.i [2024-06-14 13:00:19,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:00:19,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:00:19,081 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:00:19,136 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:00:19,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:00:19,214 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:00:19,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:00:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:00:19,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:00:19,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:00:19,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:00:19,234 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;@7037df5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:00:19,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:00:19,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:00:19,239 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:00:19,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:00:19,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:19,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:00:19,240 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)] === [2024-06-14 13:00:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 521693137, now seen corresponding path program 1 times [2024-06-14 13:00:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426448298] [2024-06-14 13:00:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:20,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:20,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426448298] [2024-06-14 13:00:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426448298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:20,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:00:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154864914] [2024-06-14 13:00:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:20,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:00:20,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:20,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:00:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:00:20,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:20,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:20,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:20,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:20,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:21,496 INFO L124 PetriNetUnfolderBase]: 1472/2226 cut-off events. [2024-06-14 13:00:21,496 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 13:00:21,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4539 conditions, 2226 events. 1472/2226 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10256 event pairs, 1009 based on Foata normal form. 1/2184 useless extension candidates. Maximal degree in co-relation 4524. Up to 2210 conditions per place. [2024-06-14 13:00:21,510 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:00:21,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 191 flow [2024-06-14 13:00:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:00:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:00:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-14 13:00:21,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-14 13:00:21,521 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 66 transitions. [2024-06-14 13:00:21,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 191 flow [2024-06-14 13:00:21,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:21,529 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:00:21,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:00:21,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:00:21,534 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:00:21,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:21,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:21,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:00:21,535 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)] === [2024-06-14 13:00:21,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1164033584, now seen corresponding path program 1 times [2024-06-14 13:00:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:21,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066080582] [2024-06-14 13:00:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066080582] [2024-06-14 13:00:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066080582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:22,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:00:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615571714] [2024-06-14 13:00:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:22,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:00:22,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:00:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:00:22,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:22,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:22,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:22,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:22,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:23,352 INFO L124 PetriNetUnfolderBase]: 1480/2237 cut-off events. [2024-06-14 13:00:23,353 INFO L125 PetriNetUnfolderBase]: For 404/412 co-relation queries the response was YES. [2024-06-14 13:00:23,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 2237 events. 1480/2237 cut-off events. For 404/412 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10196 event pairs, 881 based on Foata normal form. 8/2243 useless extension candidates. Maximal degree in co-relation 5130. Up to 2173 conditions per place. [2024-06-14 13:00:23,363 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 13:00:23,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 66 transitions, 304 flow [2024-06-14 13:00:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:00:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:00:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-14 13:00:23,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-14 13:00:23,365 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-14 13:00:23,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 66 transitions, 304 flow [2024-06-14 13:00:23,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:23,367 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 176 flow [2024-06-14 13:00:23,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-06-14 13:00:23,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-06-14 13:00:23,367 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 176 flow [2024-06-14 13:00:23,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:23,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:23,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:23,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:00:23,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:23,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1725301569, now seen corresponding path program 1 times [2024-06-14 13:00:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:23,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034562609] [2024-06-14 13:00:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:24,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034562609] [2024-06-14 13:00:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034562609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:24,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:00:24,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609611372] [2024-06-14 13:00:24,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:00:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:00:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:00:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:24,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:24,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:24,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:24,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:25,285 INFO L124 PetriNetUnfolderBase]: 1488/2248 cut-off events. [2024-06-14 13:00:25,285 INFO L125 PetriNetUnfolderBase]: For 1369/1386 co-relation queries the response was YES. [2024-06-14 13:00:25,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6037 conditions, 2248 events. 1488/2248 cut-off events. For 1369/1386 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10199 event pairs, 749 based on Foata normal form. 11/2257 useless extension candidates. Maximal degree in co-relation 6019. Up to 2174 conditions per place. [2024-06-14 13:00:25,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 66 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2024-06-14 13:00:25,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 466 flow [2024-06-14 13:00:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:00:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:00:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-14 13:00:25,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-14 13:00:25,298 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 176 flow. Second operand 5 states and 110 transitions. [2024-06-14 13:00:25,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 466 flow [2024-06-14 13:00:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 460 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 13:00:25,301 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 301 flow [2024-06-14 13:00:25,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-06-14 13:00:25,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 13:00:25,302 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 301 flow [2024-06-14 13:00:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:25,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:25,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:00:25,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:25,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1944739889, now seen corresponding path program 1 times [2024-06-14 13:00:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:25,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095836920] [2024-06-14 13:00:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:25,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095836920] [2024-06-14 13:00:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095836920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:00:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670311938] [2024-06-14 13:00:26,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:00:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:00:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:00:27,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:27,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:27,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:27,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:27,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:27,732 INFO L124 PetriNetUnfolderBase]: 1504/2270 cut-off events. [2024-06-14 13:00:27,733 INFO L125 PetriNetUnfolderBase]: For 2639/2656 co-relation queries the response was YES. [2024-06-14 13:00:27,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 2270 events. 1504/2270 cut-off events. For 2639/2656 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10334 event pairs, 621 based on Foata normal form. 11/2279 useless extension candidates. Maximal degree in co-relation 7108. Up to 2141 conditions per place. [2024-06-14 13:00:27,744 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2024-06-14 13:00:27,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 657 flow [2024-06-14 13:00:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 13:00:27,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-14 13:00:27,746 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 301 flow. Second operand 6 states and 134 transitions. [2024-06-14 13:00:27,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 657 flow [2024-06-14 13:00:27,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 636 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:27,751 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 407 flow [2024-06-14 13:00:27,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-14 13:00:27,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-14 13:00:27,752 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 407 flow [2024-06-14 13:00:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:27,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:27,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:27,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:00:27,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:27,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -157393186, now seen corresponding path program 1 times [2024-06-14 13:00:27,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437347119] [2024-06-14 13:00:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:29,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437347119] [2024-06-14 13:00:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437347119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:29,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:00:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870462601] [2024-06-14 13:00:29,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:29,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:00:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:00:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:00:29,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:29,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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) [2024-06-14 13:00:29,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:29,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:29,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:30,599 INFO L124 PetriNetUnfolderBase]: 1562/2361 cut-off events. [2024-06-14 13:00:30,600 INFO L125 PetriNetUnfolderBase]: For 4701/4718 co-relation queries the response was YES. [2024-06-14 13:00:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8334 conditions, 2361 events. 1562/2361 cut-off events. For 4701/4718 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10869 event pairs, 481 based on Foata normal form. 24/2383 useless extension candidates. Maximal degree in co-relation 8308. Up to 2147 conditions per place. [2024-06-14 13:00:30,614 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 92 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-14 13:00:30,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 818 flow [2024-06-14 13:00:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 13:00:30,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2024-06-14 13:00:30,618 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 407 flow. Second operand 7 states and 150 transitions. [2024-06-14 13:00:30,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 818 flow [2024-06-14 13:00:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 117 transitions, 768 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:30,630 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 458 flow [2024-06-14 13:00:30,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=458, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-14 13:00:30,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-14 13:00:30,632 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 458 flow [2024-06-14 13:00:30,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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) [2024-06-14 13:00:30,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:30,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:30,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:00:30,632 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)] === [2024-06-14 13:00:30,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1235711591, now seen corresponding path program 1 times [2024-06-14 13:00:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832552161] [2024-06-14 13:00:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832552161] [2024-06-14 13:00:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832552161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:32,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:32,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:00:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316358695] [2024-06-14 13:00:32,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:32,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:00:32,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:00:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:00:32,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:32,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:32,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:32,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:32,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:33,181 INFO L124 PetriNetUnfolderBase]: 1557/2354 cut-off events. [2024-06-14 13:00:33,182 INFO L125 PetriNetUnfolderBase]: For 6013/6030 co-relation queries the response was YES. [2024-06-14 13:00:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8845 conditions, 2354 events. 1557/2354 cut-off events. For 6013/6030 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10715 event pairs, 587 based on Foata normal form. 8/2360 useless extension candidates. Maximal degree in co-relation 8816. Up to 2327 conditions per place. [2024-06-14 13:00:33,194 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 72 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-14 13:00:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 672 flow [2024-06-14 13:00:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:00:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:00:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 13:00:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:00:33,196 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 458 flow. Second operand 5 states and 86 transitions. [2024-06-14 13:00:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 672 flow [2024-06-14 13:00:33,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 634 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:33,200 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 470 flow [2024-06-14 13:00:33,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-14 13:00:33,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:00:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 470 flow [2024-06-14 13:00:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:33,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:33,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:00:33,202 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)] === [2024-06-14 13:00:33,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash -347644240, now seen corresponding path program 1 times [2024-06-14 13:00:33,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585714629] [2024-06-14 13:00:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:35,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:35,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585714629] [2024-06-14 13:00:35,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585714629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:35,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:35,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:00:35,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808997034] [2024-06-14 13:00:35,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:35,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:00:35,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:00:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:00:35,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:35,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:35,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:35,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:35,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:36,285 INFO L124 PetriNetUnfolderBase]: 1779/2672 cut-off events. [2024-06-14 13:00:36,286 INFO L125 PetriNetUnfolderBase]: For 7873/7873 co-relation queries the response was YES. [2024-06-14 13:00:36,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10180 conditions, 2672 events. 1779/2672 cut-off events. For 7873/7873 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12126 event pairs, 682 based on Foata normal form. 4/2674 useless extension candidates. Maximal degree in co-relation 10149. Up to 2624 conditions per place. [2024-06-14 13:00:36,306 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 85 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-06-14 13:00:36,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 767 flow [2024-06-14 13:00:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:00:36,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 13:00:36,308 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 470 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:00:36,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 767 flow [2024-06-14 13:00:36,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 99 transitions, 732 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:36,315 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 544 flow [2024-06-14 13:00:36,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-14 13:00:36,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 13:00:36,317 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 544 flow [2024-06-14 13:00:36,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:36,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:36,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:00:36,318 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)] === [2024-06-14 13:00:36,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1825554904, now seen corresponding path program 1 times [2024-06-14 13:00:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:36,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428691227] [2024-06-14 13:00:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428691227] [2024-06-14 13:00:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428691227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:38,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:38,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:00:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8005611] [2024-06-14 13:00:38,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:38,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:00:38,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:00:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:00:38,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:38,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 544 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:38,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:38,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:38,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:39,295 INFO L124 PetriNetUnfolderBase]: 1748/2634 cut-off events. [2024-06-14 13:00:39,295 INFO L125 PetriNetUnfolderBase]: For 10638/10706 co-relation queries the response was YES. [2024-06-14 13:00:39,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10921 conditions, 2634 events. 1748/2634 cut-off events. For 10638/10706 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12234 event pairs, 622 based on Foata normal form. 20/2638 useless extension candidates. Maximal degree in co-relation 10887. Up to 2460 conditions per place. [2024-06-14 13:00:39,308 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 82 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-14 13:00:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 978 flow [2024-06-14 13:00:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:00:39,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:00:39,310 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 544 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:00:39,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 978 flow [2024-06-14 13:00:39,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 970 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:39,317 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 723 flow [2024-06-14 13:00:39,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2024-06-14 13:00:39,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 13:00:39,318 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 723 flow [2024-06-14 13:00:39,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:39,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:39,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:39,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:00:39,319 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)] === [2024-06-14 13:00:39,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1528363640, now seen corresponding path program 2 times [2024-06-14 13:00:39,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:39,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012438993] [2024-06-14 13:00:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:39,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:41,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012438993] [2024-06-14 13:00:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012438993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:41,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:00:41,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705844935] [2024-06-14 13:00:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:00:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:00:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:00:41,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:41,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:41,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:41,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:41,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:42,707 INFO L124 PetriNetUnfolderBase]: 1768/2666 cut-off events. [2024-06-14 13:00:42,707 INFO L125 PetriNetUnfolderBase]: For 14221/14312 co-relation queries the response was YES. [2024-06-14 13:00:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12103 conditions, 2666 events. 1768/2666 cut-off events. For 14221/14312 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12453 event pairs, 612 based on Foata normal form. 24/2676 useless extension candidates. Maximal degree in co-relation 12065. Up to 2495 conditions per place. [2024-06-14 13:00:42,721 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-14 13:00:42,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 1031 flow [2024-06-14 13:00:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:00:42,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:00:42,723 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 723 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:00:42,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 1031 flow [2024-06-14 13:00:42,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 993 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:42,735 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 754 flow [2024-06-14 13:00:42,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-14 13:00:42,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 13:00:42,735 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 754 flow [2024-06-14 13:00:42,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:42,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:42,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:00:42,736 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)] === [2024-06-14 13:00:42,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash 283416275, now seen corresponding path program 1 times [2024-06-14 13:00:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:42,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590929856] [2024-06-14 13:00:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:42,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:44,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:44,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590929856] [2024-06-14 13:00:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590929856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:44,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:44,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:44,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674275370] [2024-06-14 13:00:44,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:44,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:45,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:45,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 754 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) [2024-06-14 13:00:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:45,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:45,937 INFO L124 PetriNetUnfolderBase]: 1782/2690 cut-off events. [2024-06-14 13:00:45,937 INFO L125 PetriNetUnfolderBase]: For 15973/16053 co-relation queries the response was YES. [2024-06-14 13:00:45,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12529 conditions, 2690 events. 1782/2690 cut-off events. For 15973/16053 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12480 event pairs, 616 based on Foata normal form. 24/2700 useless extension candidates. Maximal degree in co-relation 12488. Up to 2593 conditions per place. [2024-06-14 13:00:45,949 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 106 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-06-14 13:00:45,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1221 flow [2024-06-14 13:00:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:00:45,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:00:45,951 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 754 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:00:45,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1221 flow [2024-06-14 13:00:45,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 1164 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:45,963 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 881 flow [2024-06-14 13:00:45,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2024-06-14 13:00:45,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 13:00:45,964 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 881 flow [2024-06-14 13:00:45,964 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) [2024-06-14 13:00:45,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:45,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:45,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:00:45,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:45,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash 757509123, now seen corresponding path program 2 times [2024-06-14 13:00:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:45,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083131324] [2024-06-14 13:00:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083131324] [2024-06-14 13:00:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083131324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:48,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:48,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351466877] [2024-06-14 13:00:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:48,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:48,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:48,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 881 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) [2024-06-14 13:00:48,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:49,292 INFO L124 PetriNetUnfolderBase]: 1809/2729 cut-off events. [2024-06-14 13:00:49,292 INFO L125 PetriNetUnfolderBase]: For 19411/19512 co-relation queries the response was YES. [2024-06-14 13:00:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13352 conditions, 2729 events. 1809/2729 cut-off events. For 19411/19512 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12694 event pairs, 598 based on Foata normal form. 40/2755 useless extension candidates. Maximal degree in co-relation 13307. Up to 2583 conditions per place. [2024-06-14 13:00:49,305 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 102 selfloop transitions, 31 changer transitions 0/140 dead transitions. [2024-06-14 13:00:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1313 flow [2024-06-14 13:00:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:00:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:00:49,306 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 881 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:00:49,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1313 flow [2024-06-14 13:00:49,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 140 transitions, 1253 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:49,319 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 948 flow [2024-06-14 13:00:49,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=948, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-14 13:00:49,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 13:00:49,320 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 948 flow [2024-06-14 13:00:49,320 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) [2024-06-14 13:00:49,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:49,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:00:49,321 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)] === [2024-06-14 13:00:49,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 744025169, now seen corresponding path program 1 times [2024-06-14 13:00:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:49,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211845862] [2024-06-14 13:00:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211845862] [2024-06-14 13:00:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211845862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:51,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:51,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227523460] [2024-06-14 13:00:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:51,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:51,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:51,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 948 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:51,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:51,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:52,629 INFO L124 PetriNetUnfolderBase]: 1933/2902 cut-off events. [2024-06-14 13:00:52,629 INFO L125 PetriNetUnfolderBase]: For 22080/22091 co-relation queries the response was YES. [2024-06-14 13:00:52,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14394 conditions, 2902 events. 1933/2902 cut-off events. For 22080/22091 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13320 event pairs, 632 based on Foata normal form. 14/2911 useless extension candidates. Maximal degree in co-relation 14348. Up to 2733 conditions per place. [2024-06-14 13:00:52,644 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-06-14 13:00:52,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 1494 flow [2024-06-14 13:00:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:00:52,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:00:52,646 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 948 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:00:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 1494 flow [2024-06-14 13:00:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1389 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:52,664 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 1048 flow [2024-06-14 13:00:52,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1048, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-14 13:00:52,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 13:00:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 1048 flow [2024-06-14 13:00:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:52,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:52,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:00:52,667 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)] === [2024-06-14 13:00:52,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 757629093, now seen corresponding path program 3 times [2024-06-14 13:00:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399451091] [2024-06-14 13:00:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399451091] [2024-06-14 13:00:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399451091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:54,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:54,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142461634] [2024-06-14 13:00:54,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:54,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:54,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:54,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 1048 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) [2024-06-14 13:00:54,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:54,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:54,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:55,806 INFO L124 PetriNetUnfolderBase]: 1894/2859 cut-off events. [2024-06-14 13:00:55,806 INFO L125 PetriNetUnfolderBase]: For 23415/23665 co-relation queries the response was YES. [2024-06-14 13:00:55,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 2859 events. 1894/2859 cut-off events. For 23415/23665 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13398 event pairs, 566 based on Foata normal form. 42/2843 useless extension candidates. Maximal degree in co-relation 14458. Up to 2586 conditions per place. [2024-06-14 13:00:55,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 120 selfloop transitions, 52 changer transitions 0/182 dead transitions. [2024-06-14 13:00:55,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 182 transitions, 1768 flow [2024-06-14 13:00:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:00:55,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:00:55,822 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 1048 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:00:55,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 182 transitions, 1768 flow [2024-06-14 13:00:55,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 182 transitions, 1736 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:55,837 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1433 flow [2024-06-14 13:00:55,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-14 13:00:55,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:00:55,838 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1433 flow [2024-06-14 13:00:55,838 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) [2024-06-14 13:00:55,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:55,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:00:55,839 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)] === [2024-06-14 13:00:55,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash -134393331, now seen corresponding path program 2 times [2024-06-14 13:00:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:55,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940613168] [2024-06-14 13:00:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:57,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940613168] [2024-06-14 13:00:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940613168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:57,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:57,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60500046] [2024-06-14 13:00:57,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:57,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:58,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:58,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1433 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:58,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:58,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:58,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:59,355 INFO L124 PetriNetUnfolderBase]: 2020/3026 cut-off events. [2024-06-14 13:00:59,356 INFO L125 PetriNetUnfolderBase]: For 27116/27144 co-relation queries the response was YES. [2024-06-14 13:00:59,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16261 conditions, 3026 events. 2020/3026 cut-off events. For 27116/27144 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13893 event pairs, 618 based on Foata normal form. 30/3052 useless extension candidates. Maximal degree in co-relation 16207. Up to 2842 conditions per place. [2024-06-14 13:00:59,375 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 32 changer transitions 0/178 dead transitions. [2024-06-14 13:00:59,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 178 transitions, 1990 flow [2024-06-14 13:00:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:00:59,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:00:59,376 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1433 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:00:59,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 178 transitions, 1990 flow [2024-06-14 13:00:59,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 178 transitions, 1920 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:59,401 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1518 flow [2024-06-14 13:00:59,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1518, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-14 13:00:59,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 13:00:59,402 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1518 flow [2024-06-14 13:00:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:59,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:59,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:59,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:00:59,402 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:59,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash 921156689, now seen corresponding path program 3 times [2024-06-14 13:00:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522574753] [2024-06-14 13:00:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:59,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522574753] [2024-06-14 13:01:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522574753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:01,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:01,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:01:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704467516] [2024-06-14 13:01:01,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:01:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:01:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:01:01,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:01,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1518 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:01,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:01,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:02,769 INFO L124 PetriNetUnfolderBase]: 2010/3012 cut-off events. [2024-06-14 13:01:02,769 INFO L125 PetriNetUnfolderBase]: For 29824/29852 co-relation queries the response was YES. [2024-06-14 13:01:02,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16436 conditions, 3012 events. 2010/3012 cut-off events. For 29824/29852 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13820 event pairs, 616 based on Foata normal form. 30/3038 useless extension candidates. Maximal degree in co-relation 16377. Up to 2834 conditions per place. [2024-06-14 13:01:02,788 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 29 changer transitions 0/176 dead transitions. [2024-06-14 13:01:02,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1934 flow [2024-06-14 13:01:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:01:02,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 13:01:02,789 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1518 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:01:02,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1934 flow [2024-06-14 13:01:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 176 transitions, 1898 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:01:02,816 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 1548 flow [2024-06-14 13:01:02,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1548, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2024-06-14 13:01:02,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:01:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 1548 flow [2024-06-14 13:01:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:02,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:02,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:01:02,818 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)] === [2024-06-14 13:01:02,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash 921156503, now seen corresponding path program 4 times [2024-06-14 13:01:02,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:02,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007892125] [2024-06-14 13:01:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:04,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007892125] [2024-06-14 13:01:04,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007892125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:04,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:04,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:01:04,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650108563] [2024-06-14 13:01:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:01:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:01:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:01:04,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:04,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 1548 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) [2024-06-14 13:01:04,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:04,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:04,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:05,871 INFO L124 PetriNetUnfolderBase]: 1919/2897 cut-off events. [2024-06-14 13:01:05,871 INFO L125 PetriNetUnfolderBase]: For 34792/35040 co-relation queries the response was YES. [2024-06-14 13:01:05,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16441 conditions, 2897 events. 1919/2897 cut-off events. For 34792/35040 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13621 event pairs, 569 based on Foata normal form. 38/2881 useless extension candidates. Maximal degree in co-relation 16380. Up to 2703 conditions per place. [2024-06-14 13:01:05,887 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 126 selfloop transitions, 42 changer transitions 0/181 dead transitions. [2024-06-14 13:01:05,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 2067 flow [2024-06-14 13:01:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:01:05,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:01:05,888 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 1548 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:01:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 2067 flow [2024-06-14 13:01:05,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 2009 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:05,914 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1650 flow [2024-06-14 13:01:05,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1650, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-14 13:01:05,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 13:01:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1650 flow [2024-06-14 13:01:05,915 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) [2024-06-14 13:01:05,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:05,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:05,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:01:05,916 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)] === [2024-06-14 13:01:05,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 921402767, now seen corresponding path program 1 times [2024-06-14 13:01:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:05,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436946156] [2024-06-14 13:01:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:08,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436946156] [2024-06-14 13:01:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436946156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222191379] [2024-06-14 13:01:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:08,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:08,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1650 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:08,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:08,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:08,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:09,739 INFO L124 PetriNetUnfolderBase]: 2008/3010 cut-off events. [2024-06-14 13:01:09,739 INFO L125 PetriNetUnfolderBase]: For 36360/36360 co-relation queries the response was YES. [2024-06-14 13:01:09,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17205 conditions, 3010 events. 2008/3010 cut-off events. For 36360/36360 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13773 event pairs, 617 based on Foata normal form. 4/3012 useless extension candidates. Maximal degree in co-relation 17143. Up to 2935 conditions per place. [2024-06-14 13:01:09,758 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 165 selfloop transitions, 15 changer transitions 0/183 dead transitions. [2024-06-14 13:01:09,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 2117 flow [2024-06-14 13:01:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 13:01:09,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3430232558139535 [2024-06-14 13:01:09,759 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1650 flow. Second operand 8 states and 118 transitions. [2024-06-14 13:01:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 2117 flow [2024-06-14 13:01:09,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 1994 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:09,794 INFO L231 Difference]: Finished difference. Result has 126 places, 158 transitions, 1607 flow [2024-06-14 13:01:09,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1607, PETRI_PLACES=126, PETRI_TRANSITIONS=158} [2024-06-14 13:01:09,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 13:01:09,794 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 158 transitions, 1607 flow [2024-06-14 13:01:09,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:09,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:09,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:09,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:01:09,795 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)] === [2024-06-14 13:01:09,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1774863849, now seen corresponding path program 1 times [2024-06-14 13:01:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:09,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293905164] [2024-06-14 13:01:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:09,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:12,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293905164] [2024-06-14 13:01:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293905164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:12,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:12,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083179338] [2024-06-14 13:01:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:12,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:13,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 158 transitions, 1607 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) [2024-06-14 13:01:13,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:14,324 INFO L124 PetriNetUnfolderBase]: 1966/2962 cut-off events. [2024-06-14 13:01:14,324 INFO L125 PetriNetUnfolderBase]: For 44698/44806 co-relation queries the response was YES. [2024-06-14 13:01:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 2962 events. 1966/2962 cut-off events. For 44698/44806 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13949 event pairs, 554 based on Foata normal form. 70/2971 useless extension candidates. Maximal degree in co-relation 17600. Up to 2531 conditions per place. [2024-06-14 13:01:14,340 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 123 selfloop transitions, 74 changer transitions 0/211 dead transitions. [2024-06-14 13:01:14,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 211 transitions, 2342 flow [2024-06-14 13:01:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 13:01:14,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 13:01:14,342 INFO L175 Difference]: Start difference. First operand has 126 places, 158 transitions, 1607 flow. Second operand 8 states and 160 transitions. [2024-06-14 13:01:14,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 211 transitions, 2342 flow [2024-06-14 13:01:14,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 2303 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:14,369 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1847 flow [2024-06-14 13:01:14,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1847, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-14 13:01:14,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 13:01:14,369 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1847 flow [2024-06-14 13:01:14,370 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) [2024-06-14 13:01:14,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:14,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:14,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:01:14,370 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)] === [2024-06-14 13:01:14,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1774773639, now seen corresponding path program 2 times [2024-06-14 13:01:14,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:14,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254648] [2024-06-14 13:01:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:14,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:17,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254648] [2024-06-14 13:01:17,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:17,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:17,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374574299] [2024-06-14 13:01:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:17,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:17,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1847 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) [2024-06-14 13:01:17,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:17,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:17,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:18,604 INFO L124 PetriNetUnfolderBase]: 1990/2997 cut-off events. [2024-06-14 13:01:18,604 INFO L125 PetriNetUnfolderBase]: For 50647/50780 co-relation queries the response was YES. [2024-06-14 13:01:18,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18848 conditions, 2997 events. 1990/2997 cut-off events. For 50647/50780 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14112 event pairs, 561 based on Foata normal form. 71/3011 useless extension candidates. Maximal degree in co-relation 18784. Up to 2772 conditions per place. [2024-06-14 13:01:18,625 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 152 selfloop transitions, 43 changer transitions 0/209 dead transitions. [2024-06-14 13:01:18,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 209 transitions, 2454 flow [2024-06-14 13:01:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:01:18,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:01:18,627 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1847 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:01:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 209 transitions, 2454 flow [2024-06-14 13:01:18,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2328 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:18,668 INFO L231 Difference]: Finished difference. Result has 133 places, 170 transitions, 1885 flow [2024-06-14 13:01:18,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1885, PETRI_PLACES=133, PETRI_TRANSITIONS=170} [2024-06-14 13:01:18,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 13:01:18,669 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 170 transitions, 1885 flow [2024-06-14 13:01:18,669 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) [2024-06-14 13:01:18,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:18,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:01:18,670 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)] === [2024-06-14 13:01:18,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1586221026, now seen corresponding path program 1 times [2024-06-14 13:01:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568046042] [2024-06-14 13:01:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:21,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568046042] [2024-06-14 13:01:21,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568046042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:21,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:21,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:21,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785906112] [2024-06-14 13:01:21,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:21,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:21,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:21,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:21,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 170 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:21,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:21,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:21,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:22,148 INFO L124 PetriNetUnfolderBase]: 2114/3159 cut-off events. [2024-06-14 13:01:22,148 INFO L125 PetriNetUnfolderBase]: For 49013/49027 co-relation queries the response was YES. [2024-06-14 13:01:22,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19484 conditions, 3159 events. 2114/3159 cut-off events. For 49013/49027 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14569 event pairs, 623 based on Foata normal form. 18/3175 useless extension candidates. Maximal degree in co-relation 19418. Up to 3032 conditions per place. [2024-06-14 13:01:22,170 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 25 changer transitions 0/219 dead transitions. [2024-06-14 13:01:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 219 transitions, 2575 flow [2024-06-14 13:01:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:01:22,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:01:22,172 INFO L175 Difference]: Start difference. First operand has 133 places, 170 transitions, 1885 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:01:22,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 219 transitions, 2575 flow [2024-06-14 13:01:22,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 219 transitions, 2449 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:22,217 INFO L231 Difference]: Finished difference. Result has 137 places, 183 transitions, 2011 flow [2024-06-14 13:01:22,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2011, PETRI_PLACES=137, PETRI_TRANSITIONS=183} [2024-06-14 13:01:22,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 13:01:22,218 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 183 transitions, 2011 flow [2024-06-14 13:01:22,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:22,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:22,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:22,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:01:22,218 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)] === [2024-06-14 13:01:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1589945676, now seen corresponding path program 2 times [2024-06-14 13:01:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:22,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954838993] [2024-06-14 13:01:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:24,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954838993] [2024-06-14 13:01:24,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954838993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:24,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210408902] [2024-06-14 13:01:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:24,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:24,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:24,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 2011 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:24,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:24,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:25,523 INFO L124 PetriNetUnfolderBase]: 2140/3199 cut-off events. [2024-06-14 13:01:25,524 INFO L125 PetriNetUnfolderBase]: For 53906/53924 co-relation queries the response was YES. [2024-06-14 13:01:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20175 conditions, 3199 events. 2140/3199 cut-off events. For 53906/53924 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14736 event pairs, 582 based on Foata normal form. 22/3217 useless extension candidates. Maximal degree in co-relation 20106. Up to 3049 conditions per place. [2024-06-14 13:01:25,546 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 32 changer transitions 0/229 dead transitions. [2024-06-14 13:01:25,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 229 transitions, 2641 flow [2024-06-14 13:01:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:01:25,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:01:25,547 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 2011 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:01:25,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 229 transitions, 2641 flow [2024-06-14 13:01:25,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 229 transitions, 2585 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:25,598 INFO L231 Difference]: Finished difference. Result has 145 places, 198 transitions, 2175 flow [2024-06-14 13:01:25,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2175, PETRI_PLACES=145, PETRI_TRANSITIONS=198} [2024-06-14 13:01:25,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 13:01:25,599 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 198 transitions, 2175 flow [2024-06-14 13:01:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:25,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:25,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:01:25,599 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:25,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1589939941, now seen corresponding path program 3 times [2024-06-14 13:01:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137081022] [2024-06-14 13:01:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137081022] [2024-06-14 13:01:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137081022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612097430] [2024-06-14 13:01:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:28,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:28,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 198 transitions, 2175 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) [2024-06-14 13:01:28,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:28,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:28,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:29,454 INFO L124 PetriNetUnfolderBase]: 2102/3156 cut-off events. [2024-06-14 13:01:29,455 INFO L125 PetriNetUnfolderBase]: For 66345/66480 co-relation queries the response was YES. [2024-06-14 13:01:29,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21394 conditions, 3156 events. 2102/3156 cut-off events. For 66345/66480 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14903 event pairs, 515 based on Foata normal form. 45/3141 useless extension candidates. Maximal degree in co-relation 21320. Up to 2900 conditions per place. [2024-06-14 13:01:29,476 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 165 selfloop transitions, 48 changer transitions 0/235 dead transitions. [2024-06-14 13:01:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 235 transitions, 2797 flow [2024-06-14 13:01:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:01:29,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:01:29,477 INFO L175 Difference]: Start difference. First operand has 145 places, 198 transitions, 2175 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:01:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 235 transitions, 2797 flow [2024-06-14 13:01:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 235 transitions, 2766 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:01:29,532 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2317 flow [2024-06-14 13:01:29,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2317, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-06-14 13:01:29,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 13:01:29,533 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2317 flow [2024-06-14 13:01:29,533 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) [2024-06-14 13:01:29,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:29,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:29,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:01:29,533 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:29,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:29,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2011667506, now seen corresponding path program 3 times [2024-06-14 13:01:29,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:29,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291469646] [2024-06-14 13:01:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:29,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:31,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291469646] [2024-06-14 13:01:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291469646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078557364] [2024-06-14 13:01:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:31,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:31,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2317 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:31,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:31,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:31,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:32,868 INFO L124 PetriNetUnfolderBase]: 2216/3310 cut-off events. [2024-06-14 13:01:32,868 INFO L125 PetriNetUnfolderBase]: For 65096/65120 co-relation queries the response was YES. [2024-06-14 13:01:32,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22157 conditions, 3310 events. 2216/3310 cut-off events. For 65096/65120 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15288 event pairs, 587 based on Foata normal form. 26/3331 useless extension candidates. Maximal degree in co-relation 22080. Up to 3063 conditions per place. [2024-06-14 13:01:32,897 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 48 changer transitions 0/244 dead transitions. [2024-06-14 13:01:32,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 244 transitions, 3066 flow [2024-06-14 13:01:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:01:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:01:32,899 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2317 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:01:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 244 transitions, 3066 flow [2024-06-14 13:01:32,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 244 transitions, 2932 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:32,969 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2397 flow [2024-06-14 13:01:32,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2397, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-14 13:01:32,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 13:01:32,970 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2397 flow [2024-06-14 13:01:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:32,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:32,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:01:32,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:32,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash 121424302, now seen corresponding path program 4 times [2024-06-14 13:01:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:32,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112269594] [2024-06-14 13:01:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:34,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112269594] [2024-06-14 13:01:34,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112269594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:34,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:34,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64283765] [2024-06-14 13:01:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:34,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:34,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2397 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:34,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:34,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:36,311 INFO L124 PetriNetUnfolderBase]: 2242/3347 cut-off events. [2024-06-14 13:01:36,311 INFO L125 PetriNetUnfolderBase]: For 71064/71098 co-relation queries the response was YES. [2024-06-14 13:01:36,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22930 conditions, 3347 events. 2242/3347 cut-off events. For 71064/71098 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15486 event pairs, 579 based on Foata normal form. 36/3379 useless extension candidates. Maximal degree in co-relation 22851. Up to 3141 conditions per place. [2024-06-14 13:01:36,333 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 200 selfloop transitions, 40 changer transitions 0/243 dead transitions. [2024-06-14 13:01:36,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 243 transitions, 3006 flow [2024-06-14 13:01:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:01:36,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:01:36,335 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2397 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:01:36,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 243 transitions, 3006 flow [2024-06-14 13:01:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 243 transitions, 2923 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:36,398 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2451 flow [2024-06-14 13:01:36,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2451, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-06-14 13:01:36,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 13:01:36,398 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2451 flow [2024-06-14 13:01:36,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:36,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:36,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:01:36,399 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:36,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1508709986, now seen corresponding path program 5 times [2024-06-14 13:01:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262606548] [2024-06-14 13:01:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:38,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262606548] [2024-06-14 13:01:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262606548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60062036] [2024-06-14 13:01:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:38,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:38,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2451 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:38,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:38,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:38,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:39,762 INFO L124 PetriNetUnfolderBase]: 2268/3385 cut-off events. [2024-06-14 13:01:39,763 INFO L125 PetriNetUnfolderBase]: For 77003/77037 co-relation queries the response was YES. [2024-06-14 13:01:39,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3385 events. 2268/3385 cut-off events. For 77003/77037 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15666 event pairs, 581 based on Foata normal form. 36/3417 useless extension candidates. Maximal degree in co-relation 23664. Up to 3179 conditions per place. [2024-06-14 13:01:39,787 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-14 13:01:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 246 transitions, 3072 flow [2024-06-14 13:01:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:01:39,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:01:39,789 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2451 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:01:39,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 246 transitions, 3072 flow [2024-06-14 13:01:39,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 246 transitions, 2961 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:39,857 INFO L231 Difference]: Finished difference. Result has 160 places, 216 transitions, 2485 flow [2024-06-14 13:01:39,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2485, PETRI_PLACES=160, PETRI_TRANSITIONS=216} [2024-06-14 13:01:39,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 13:01:39,858 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 216 transitions, 2485 flow [2024-06-14 13:01:39,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:39,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:39,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:39,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:01:39,859 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:39,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 983266482, now seen corresponding path program 6 times [2024-06-14 13:01:39,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:39,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740133463] [2024-06-14 13:01:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:39,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:41,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:41,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740133463] [2024-06-14 13:01:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740133463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668519627] [2024-06-14 13:01:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:41,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:41,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:41,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 216 transitions, 2485 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:41,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:41,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:41,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:43,150 INFO L124 PetriNetUnfolderBase]: 2258/3371 cut-off events. [2024-06-14 13:01:43,150 INFO L125 PetriNetUnfolderBase]: For 81889/81923 co-relation queries the response was YES. [2024-06-14 13:01:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23989 conditions, 3371 events. 2258/3371 cut-off events. For 81889/81923 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15620 event pairs, 577 based on Foata normal form. 36/3403 useless extension candidates. Maximal degree in co-relation 23907. Up to 3104 conditions per place. [2024-06-14 13:01:43,178 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 201 selfloop transitions, 48 changer transitions 0/252 dead transitions. [2024-06-14 13:01:43,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 252 transitions, 3155 flow [2024-06-14 13:01:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:01:43,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:01:43,180 INFO L175 Difference]: Start difference. First operand has 160 places, 216 transitions, 2485 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:01:43,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 252 transitions, 3155 flow [2024-06-14 13:01:43,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 252 transitions, 3036 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:43,260 INFO L231 Difference]: Finished difference. Result has 163 places, 222 transitions, 2580 flow [2024-06-14 13:01:43,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2580, PETRI_PLACES=163, PETRI_TRANSITIONS=222} [2024-06-14 13:01:43,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 13:01:43,261 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 222 transitions, 2580 flow [2024-06-14 13:01:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 13:01:43,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:43,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:01:43,261 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:43,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash 983266327, now seen corresponding path program 4 times [2024-06-14 13:01:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233307845] [2024-06-14 13:01:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233307845] [2024-06-14 13:01:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233307845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:45,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173024351] [2024-06-14 13:01:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:45,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:45,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:45,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 222 transitions, 2580 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) [2024-06-14 13:01:45,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:45,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:45,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:46,861 INFO L124 PetriNetUnfolderBase]: 2221/3335 cut-off events. [2024-06-14 13:01:46,861 INFO L125 PetriNetUnfolderBase]: For 96783/96952 co-relation queries the response was YES. [2024-06-14 13:01:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24690 conditions, 3335 events. 2221/3335 cut-off events. For 96783/96952 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15771 event pairs, 514 based on Foata normal form. 39/3319 useless extension candidates. Maximal degree in co-relation 24606. Up to 3030 conditions per place. [2024-06-14 13:01:46,886 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 182 selfloop transitions, 64 changer transitions 0/274 dead transitions. [2024-06-14 13:01:46,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 274 transitions, 3553 flow [2024-06-14 13:01:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:01:46,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:01:46,887 INFO L175 Difference]: Start difference. First operand has 163 places, 222 transitions, 2580 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:01:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 274 transitions, 3553 flow [2024-06-14 13:01:46,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 274 transitions, 3426 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:46,965 INFO L231 Difference]: Finished difference. Result has 172 places, 238 transitions, 2830 flow [2024-06-14 13:01:46,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2830, PETRI_PLACES=172, PETRI_TRANSITIONS=238} [2024-06-14 13:01:46,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:01:46,966 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 238 transitions, 2830 flow [2024-06-14 13:01:46,966 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) [2024-06-14 13:01:46,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:46,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:46,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:01:46,966 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:46,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -190092902, now seen corresponding path program 1 times [2024-06-14 13:01:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492342577] [2024-06-14 13:01:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:46,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492342577] [2024-06-14 13:01:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492342577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:50,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:50,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:50,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656281798] [2024-06-14 13:01:50,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:50,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:50,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 238 transitions, 2830 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:50,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:50,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:50,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:51,868 INFO L124 PetriNetUnfolderBase]: 2592/3910 cut-off events. [2024-06-14 13:01:51,868 INFO L125 PetriNetUnfolderBase]: For 120843/121047 co-relation queries the response was YES. [2024-06-14 13:01:51,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29562 conditions, 3910 events. 2592/3910 cut-off events. For 120843/121047 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19282 event pairs, 489 based on Foata normal form. 47/3886 useless extension candidates. Maximal degree in co-relation 29473. Up to 2992 conditions per place. [2024-06-14 13:01:51,897 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 219 selfloop transitions, 104 changer transitions 0/351 dead transitions. [2024-06-14 13:01:51,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 351 transitions, 4659 flow [2024-06-14 13:01:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 13:01:51,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 13:01:51,898 INFO L175 Difference]: Start difference. First operand has 172 places, 238 transitions, 2830 flow. Second operand 10 states and 189 transitions. [2024-06-14 13:01:51,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 351 transitions, 4659 flow [2024-06-14 13:01:52,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 351 transitions, 4527 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:52,020 INFO L231 Difference]: Finished difference. Result has 182 places, 286 transitions, 3780 flow [2024-06-14 13:01:52,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3780, PETRI_PLACES=182, PETRI_TRANSITIONS=286} [2024-06-14 13:01:52,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 13:01:52,021 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 286 transitions, 3780 flow [2024-06-14 13:01:52,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:52,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:52,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:52,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:01:52,021 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:52,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1925412214, now seen corresponding path program 2 times [2024-06-14 13:01:52,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:52,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249184248] [2024-06-14 13:01:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:52,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:55,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249184248] [2024-06-14 13:01:55,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249184248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:55,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:55,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411211816] [2024-06-14 13:01:55,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:01:55,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 286 transitions, 3780 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:55,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:55,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:01:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:56,934 INFO L124 PetriNetUnfolderBase]: 2690/4067 cut-off events. [2024-06-14 13:01:56,934 INFO L125 PetriNetUnfolderBase]: For 137793/138056 co-relation queries the response was YES. [2024-06-14 13:01:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32310 conditions, 4067 events. 2690/4067 cut-off events. For 137793/138056 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20275 event pairs, 541 based on Foata normal form. 111/4109 useless extension candidates. Maximal degree in co-relation 32215. Up to 3299 conditions per place. [2024-06-14 13:01:56,972 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 177 selfloop transitions, 139 changer transitions 0/344 dead transitions. [2024-06-14 13:01:56,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 344 transitions, 4771 flow [2024-06-14 13:01:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 13:01:56,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-14 13:01:56,973 INFO L175 Difference]: Start difference. First operand has 182 places, 286 transitions, 3780 flow. Second operand 9 states and 178 transitions. [2024-06-14 13:01:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 344 transitions, 4771 flow [2024-06-14 13:01:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 344 transitions, 4747 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:01:57,124 INFO L231 Difference]: Finished difference. Result has 189 places, 291 transitions, 4171 flow [2024-06-14 13:01:57,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4171, PETRI_PLACES=189, PETRI_TRANSITIONS=291} [2024-06-14 13:01:57,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 13:01:57,125 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 291 transitions, 4171 flow [2024-06-14 13:01:57,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:57,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:57,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:57,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:01:57,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:57,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2114060160, now seen corresponding path program 1 times [2024-06-14 13:01:57,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333272092] [2024-06-14 13:01:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:00,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:00,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333272092] [2024-06-14 13:02:00,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333272092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:00,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:00,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:00,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34214289] [2024-06-14 13:02:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:00,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:00,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:00,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 291 transitions, 4171 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:00,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:00,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:00,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:02,312 INFO L124 PetriNetUnfolderBase]: 2900/4348 cut-off events. [2024-06-14 13:02:02,313 INFO L125 PetriNetUnfolderBase]: For 136273/136312 co-relation queries the response was YES. [2024-06-14 13:02:02,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34859 conditions, 4348 events. 2900/4348 cut-off events. For 136273/136312 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21457 event pairs, 610 based on Foata normal form. 36/4380 useless extension candidates. Maximal degree in co-relation 34762. Up to 3638 conditions per place. [2024-06-14 13:02:02,354 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 282 selfloop transitions, 86 changer transitions 0/371 dead transitions. [2024-06-14 13:02:02,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 371 transitions, 5534 flow [2024-06-14 13:02:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:02:02,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:02:02,356 INFO L175 Difference]: Start difference. First operand has 189 places, 291 transitions, 4171 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:02:02,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 371 transitions, 5534 flow [2024-06-14 13:02:02,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 371 transitions, 5203 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:02,528 INFO L231 Difference]: Finished difference. Result has 194 places, 317 transitions, 4471 flow [2024-06-14 13:02:02,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4471, PETRI_PLACES=194, PETRI_TRANSITIONS=317} [2024-06-14 13:02:02,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 13:02:02,528 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 317 transitions, 4471 flow [2024-06-14 13:02:02,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:02,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:02,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:02,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:02:02,529 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:02,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1928208848, now seen corresponding path program 2 times [2024-06-14 13:02:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754139739] [2024-06-14 13:02:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:07,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:07,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754139739] [2024-06-14 13:02:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754139739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127697571] [2024-06-14 13:02:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:07,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:07,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:07,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 317 transitions, 4471 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:07,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:07,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:07,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:08,883 INFO L124 PetriNetUnfolderBase]: 2962/4438 cut-off events. [2024-06-14 13:02:08,883 INFO L125 PetriNetUnfolderBase]: For 145477/145520 co-relation queries the response was YES. [2024-06-14 13:02:08,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36340 conditions, 4438 events. 2962/4438 cut-off events. For 145477/145520 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 21978 event pairs, 628 based on Foata normal form. 40/4474 useless extension candidates. Maximal degree in co-relation 36239. Up to 3919 conditions per place. [2024-06-14 13:02:08,925 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 295 selfloop transitions, 73 changer transitions 0/371 dead transitions. [2024-06-14 13:02:08,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 371 transitions, 5584 flow [2024-06-14 13:02:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:02:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:02:08,927 INFO L175 Difference]: Start difference. First operand has 194 places, 317 transitions, 4471 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:02:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 371 transitions, 5584 flow [2024-06-14 13:02:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 371 transitions, 5459 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:09,149 INFO L231 Difference]: Finished difference. Result has 201 places, 325 transitions, 4648 flow [2024-06-14 13:02:09,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4370, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4648, PETRI_PLACES=201, PETRI_TRANSITIONS=325} [2024-06-14 13:02:09,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:02:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 325 transitions, 4648 flow [2024-06-14 13:02:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:09,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:09,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:02:09,150 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:09,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2116861320, now seen corresponding path program 3 times [2024-06-14 13:02:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623436441] [2024-06-14 13:02:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:12,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623436441] [2024-06-14 13:02:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623436441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:12,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:12,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:12,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925205598] [2024-06-14 13:02:12,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:12,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:12,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:12,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:12,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:12,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 325 transitions, 4648 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:12,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:12,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:12,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:13,854 INFO L124 PetriNetUnfolderBase]: 2952/4427 cut-off events. [2024-06-14 13:02:13,854 INFO L125 PetriNetUnfolderBase]: For 149456/149490 co-relation queries the response was YES. [2024-06-14 13:02:13,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36543 conditions, 4427 events. 2952/4427 cut-off events. For 149456/149490 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21892 event pairs, 647 based on Foata normal form. 32/4457 useless extension candidates. Maximal degree in co-relation 36439. Up to 4158 conditions per place. [2024-06-14 13:02:13,897 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 319 selfloop transitions, 40 changer transitions 0/362 dead transitions. [2024-06-14 13:02:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 362 transitions, 5486 flow [2024-06-14 13:02:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:02:13,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:02:13,899 INFO L175 Difference]: Start difference. First operand has 201 places, 325 transitions, 4648 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:02:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 362 transitions, 5486 flow [2024-06-14 13:02:14,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 362 transitions, 5342 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:14,132 INFO L231 Difference]: Finished difference. Result has 204 places, 326 transitions, 4618 flow [2024-06-14 13:02:14,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4618, PETRI_PLACES=204, PETRI_TRANSITIONS=326} [2024-06-14 13:02:14,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 13:02:14,132 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 326 transitions, 4618 flow [2024-06-14 13:02:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:14,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:14,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:14,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:02:14,133 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:14,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1928208724, now seen corresponding path program 3 times [2024-06-14 13:02:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:14,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069161381] [2024-06-14 13:02:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069161381] [2024-06-14 13:02:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069161381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:17,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956935156] [2024-06-14 13:02:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:17,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:17,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:02:17,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 326 transitions, 4618 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:17,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:17,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:02:17,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:19,427 INFO L124 PetriNetUnfolderBase]: 2943/4459 cut-off events. [2024-06-14 13:02:19,427 INFO L125 PetriNetUnfolderBase]: For 177874/178009 co-relation queries the response was YES. [2024-06-14 13:02:19,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 4459 events. 2943/4459 cut-off events. For 177874/178009 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22712 event pairs, 595 based on Foata normal form. 49/4427 useless extension candidates. Maximal degree in co-relation 37602. Up to 3963 conditions per place. [2024-06-14 13:02:19,470 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 261 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-14 13:02:19,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 379 transitions, 5637 flow [2024-06-14 13:02:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:02:19,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:02:19,471 INFO L175 Difference]: Start difference. First operand has 204 places, 326 transitions, 4618 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:02:19,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 379 transitions, 5637 flow [2024-06-14 13:02:19,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 379 transitions, 5585 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:19,695 INFO L231 Difference]: Finished difference. Result has 208 places, 330 transitions, 4845 flow [2024-06-14 13:02:19,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4845, PETRI_PLACES=208, PETRI_TRANSITIONS=330} [2024-06-14 13:02:19,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-14 13:02:19,696 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 330 transitions, 4845 flow [2024-06-14 13:02:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:19,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:19,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:02:19,696 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:19,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2062641826, now seen corresponding path program 4 times [2024-06-14 13:02:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047923927] [2024-06-14 13:02:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:22,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:22,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047923927] [2024-06-14 13:02:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047923927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158226464] [2024-06-14 13:02:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:22,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:22,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 330 transitions, 4845 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:22,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:22,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:22,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:23,868 INFO L124 PetriNetUnfolderBase]: 3099/4664 cut-off events. [2024-06-14 13:02:23,868 INFO L125 PetriNetUnfolderBase]: For 164892/164916 co-relation queries the response was YES. [2024-06-14 13:02:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38916 conditions, 4664 events. 3099/4664 cut-off events. For 164892/164916 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23510 event pairs, 732 based on Foata normal form. 28/4687 useless extension candidates. Maximal degree in co-relation 38810. Up to 4377 conditions per place. [2024-06-14 13:02:23,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 319 selfloop transitions, 53 changer transitions 0/375 dead transitions. [2024-06-14 13:02:23,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 375 transitions, 5916 flow [2024-06-14 13:02:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:02:23,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:02:23,915 INFO L175 Difference]: Start difference. First operand has 208 places, 330 transitions, 4845 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:02:23,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 375 transitions, 5916 flow [2024-06-14 13:02:24,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 375 transitions, 5735 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:24,139 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 4889 flow [2024-06-14 13:02:24,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4664, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4889, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2024-06-14 13:02:24,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 13:02:24,140 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 4889 flow [2024-06-14 13:02:24,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:24,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:24,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:24,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:02:24,140 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:24,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2062635130, now seen corresponding path program 1 times [2024-06-14 13:02:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:24,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11534177] [2024-06-14 13:02:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11534177] [2024-06-14 13:02:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11534177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096323075] [2024-06-14 13:02:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:26,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:26,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 4889 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:26,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:26,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:26,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:28,657 INFO L124 PetriNetUnfolderBase]: 3091/4652 cut-off events. [2024-06-14 13:02:28,657 INFO L125 PetriNetUnfolderBase]: For 169000/169024 co-relation queries the response was YES. [2024-06-14 13:02:28,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39136 conditions, 4652 events. 3091/4652 cut-off events. For 169000/169024 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23415 event pairs, 732 based on Foata normal form. 24/4671 useless extension candidates. Maximal degree in co-relation 39029. Up to 4408 conditions per place. [2024-06-14 13:02:28,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 317 selfloop transitions, 47 changer transitions 0/367 dead transitions. [2024-06-14 13:02:28,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 367 transitions, 5703 flow [2024-06-14 13:02:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:02:28,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:02:28,704 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 4889 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:02:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 367 transitions, 5703 flow [2024-06-14 13:02:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 367 transitions, 5529 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:28,922 INFO L231 Difference]: Finished difference. Result has 212 places, 336 transitions, 4821 flow [2024-06-14 13:02:28,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4821, PETRI_PLACES=212, PETRI_TRANSITIONS=336} [2024-06-14 13:02:28,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 13:02:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 336 transitions, 4821 flow [2024-06-14 13:02:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:28,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:28,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:28,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:02:28,924 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:28,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2043684592, now seen corresponding path program 1 times [2024-06-14 13:02:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39867665] [2024-06-14 13:02:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39867665] [2024-06-14 13:02:31,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39867665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:31,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:31,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998519349] [2024-06-14 13:02:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:31,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:31,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 336 transitions, 4821 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:31,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:31,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:31,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:33,856 INFO L124 PetriNetUnfolderBase]: 3111/4684 cut-off events. [2024-06-14 13:02:33,856 INFO L125 PetriNetUnfolderBase]: For 176993/177017 co-relation queries the response was YES. [2024-06-14 13:02:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39309 conditions, 4684 events. 3111/4684 cut-off events. For 176993/177017 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23658 event pairs, 734 based on Foata normal form. 26/4705 useless extension candidates. Maximal degree in co-relation 39201. Up to 4451 conditions per place. [2024-06-14 13:02:33,902 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 324 selfloop transitions, 43 changer transitions 0/370 dead transitions. [2024-06-14 13:02:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 370 transitions, 5671 flow [2024-06-14 13:02:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:02:33,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:02:33,904 INFO L175 Difference]: Start difference. First operand has 212 places, 336 transitions, 4821 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:02:33,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 370 transitions, 5671 flow [2024-06-14 13:02:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 370 transitions, 5577 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:34,132 INFO L231 Difference]: Finished difference. Result has 213 places, 338 transitions, 4852 flow [2024-06-14 13:02:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4852, PETRI_PLACES=213, PETRI_TRANSITIONS=338} [2024-06-14 13:02:34,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 13:02:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 338 transitions, 4852 flow [2024-06-14 13:02:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:34,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:02:34,133 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2043499894, now seen corresponding path program 4 times [2024-06-14 13:02:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573992277] [2024-06-14 13:02:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:36,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573992277] [2024-06-14 13:02:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573992277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:36,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:36,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:36,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510952575] [2024-06-14 13:02:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:36,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:36,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:36,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:36,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:02:36,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 338 transitions, 4852 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:36,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:36,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:02:36,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:38,799 INFO L124 PetriNetUnfolderBase]: 3322/5034 cut-off events. [2024-06-14 13:02:38,799 INFO L125 PetriNetUnfolderBase]: For 241408/241665 co-relation queries the response was YES. [2024-06-14 13:02:38,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44669 conditions, 5034 events. 3322/5034 cut-off events. For 241408/241665 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26400 event pairs, 578 based on Foata normal form. 75/5028 useless extension candidates. Maximal degree in co-relation 44560. Up to 4010 conditions per place. [2024-06-14 13:02:38,849 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 215 selfloop transitions, 162 changer transitions 0/417 dead transitions. [2024-06-14 13:02:38,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 417 transitions, 6497 flow [2024-06-14 13:02:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 13:02:38,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 13:02:38,850 INFO L175 Difference]: Start difference. First operand has 213 places, 338 transitions, 4852 flow. Second operand 10 states and 198 transitions. [2024-06-14 13:02:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 417 transitions, 6497 flow [2024-06-14 13:02:39,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 417 transitions, 6390 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:39,107 INFO L231 Difference]: Finished difference. Result has 219 places, 361 transitions, 5671 flow [2024-06-14 13:02:39,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5671, PETRI_PLACES=219, PETRI_TRANSITIONS=361} [2024-06-14 13:02:39,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:02:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 361 transitions, 5671 flow [2024-06-14 13:02:39,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:39,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:39,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:02:39,108 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2043500018, now seen corresponding path program 5 times [2024-06-14 13:02:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088572772] [2024-06-14 13:02:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088572772] [2024-06-14 13:02:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088572772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:41,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:41,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:41,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233964554] [2024-06-14 13:02:41,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:41,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:41,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:41,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:41,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 361 transitions, 5671 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:41,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:41,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:41,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:43,708 INFO L124 PetriNetUnfolderBase]: 3534/5320 cut-off events. [2024-06-14 13:02:43,708 INFO L125 PetriNetUnfolderBase]: For 250810/250831 co-relation queries the response was YES. [2024-06-14 13:02:43,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49135 conditions, 5320 events. 3534/5320 cut-off events. For 250810/250831 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27487 event pairs, 815 based on Foata normal form. 24/5340 useless extension candidates. Maximal degree in co-relation 49023. Up to 4943 conditions per place. [2024-06-14 13:02:43,769 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 349 selfloop transitions, 63 changer transitions 0/415 dead transitions. [2024-06-14 13:02:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 415 transitions, 6907 flow [2024-06-14 13:02:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:02:43,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:02:43,770 INFO L175 Difference]: Start difference. First operand has 219 places, 361 transitions, 5671 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:02:43,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 415 transitions, 6907 flow [2024-06-14 13:02:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 415 transitions, 6672 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:44,236 INFO L231 Difference]: Finished difference. Result has 226 places, 369 transitions, 5734 flow [2024-06-14 13:02:44,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5734, PETRI_PLACES=226, PETRI_TRANSITIONS=369} [2024-06-14 13:02:44,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:02:44,237 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 369 transitions, 5734 flow [2024-06-14 13:02:44,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:44,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:44,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:44,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:02:44,237 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:44,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2043504668, now seen corresponding path program 6 times [2024-06-14 13:02:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:44,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905985600] [2024-06-14 13:02:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905985600] [2024-06-14 13:02:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905985600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:46,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:46,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444474826] [2024-06-14 13:02:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:46,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:46,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 369 transitions, 5734 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:46,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:46,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:48,777 INFO L124 PetriNetUnfolderBase]: 3524/5307 cut-off events. [2024-06-14 13:02:48,777 INFO L125 PetriNetUnfolderBase]: For 252045/252069 co-relation queries the response was YES. [2024-06-14 13:02:48,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48650 conditions, 5307 events. 3524/5307 cut-off events. For 252045/252069 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27478 event pairs, 818 based on Foata normal form. 26/5328 useless extension candidates. Maximal degree in co-relation 48535. Up to 4985 conditions per place. [2024-06-14 13:02:48,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 347 selfloop transitions, 58 changer transitions 0/408 dead transitions. [2024-06-14 13:02:48,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 408 transitions, 6677 flow [2024-06-14 13:02:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:02:48,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:02:48,834 INFO L175 Difference]: Start difference. First operand has 226 places, 369 transitions, 5734 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:02:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 408 transitions, 6677 flow [2024-06-14 13:02:49,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 408 transitions, 6524 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:49,164 INFO L231 Difference]: Finished difference. Result has 228 places, 370 transitions, 5728 flow [2024-06-14 13:02:49,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5728, PETRI_PLACES=228, PETRI_TRANSITIONS=370} [2024-06-14 13:02:49,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:02:49,165 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 370 transitions, 5728 flow [2024-06-14 13:02:49,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:49,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:49,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:02:49,165 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:49,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -530811986, now seen corresponding path program 7 times [2024-06-14 13:02:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:49,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766507536] [2024-06-14 13:02:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:49,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:51,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766507536] [2024-06-14 13:02:51,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766507536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680219451] [2024-06-14 13:02:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:51,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:51,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 370 transitions, 5728 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:51,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:51,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:51,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:53,922 INFO L124 PetriNetUnfolderBase]: 3550/5334 cut-off events. [2024-06-14 13:02:53,922 INFO L125 PetriNetUnfolderBase]: For 260089/260128 co-relation queries the response was YES. [2024-06-14 13:02:53,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49149 conditions, 5334 events. 3550/5334 cut-off events. For 260089/260128 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27466 event pairs, 744 based on Foata normal form. 40/5369 useless extension candidates. Maximal degree in co-relation 49033. Up to 5134 conditions per place. [2024-06-14 13:02:53,982 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 368 selfloop transitions, 38 changer transitions 0/409 dead transitions. [2024-06-14 13:02:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 409 transitions, 6712 flow [2024-06-14 13:02:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:02:53,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:02:53,984 INFO L175 Difference]: Start difference. First operand has 228 places, 370 transitions, 5728 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:02:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 409 transitions, 6712 flow [2024-06-14 13:02:54,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 409 transitions, 6593 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:54,371 INFO L231 Difference]: Finished difference. Result has 230 places, 374 transitions, 5767 flow [2024-06-14 13:02:54,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5767, PETRI_PLACES=230, PETRI_TRANSITIONS=374} [2024-06-14 13:02:54,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 13:02:54,372 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 374 transitions, 5767 flow [2024-06-14 13:02:54,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:54,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:54,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:54,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:02:54,373 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:54,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 416491818, now seen corresponding path program 8 times [2024-06-14 13:02:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194650362] [2024-06-14 13:02:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194650362] [2024-06-14 13:02:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194650362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:57,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:57,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314643802] [2024-06-14 13:02:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:57,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:57,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 374 transitions, 5767 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:57,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:57,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:57,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:58,978 INFO L124 PetriNetUnfolderBase]: 3576/5372 cut-off events. [2024-06-14 13:02:58,978 INFO L125 PetriNetUnfolderBase]: For 270848/270887 co-relation queries the response was YES. [2024-06-14 13:02:59,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49671 conditions, 5372 events. 3576/5372 cut-off events. For 270848/270887 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27669 event pairs, 738 based on Foata normal form. 40/5407 useless extension candidates. Maximal degree in co-relation 49554. Up to 5117 conditions per place. [2024-06-14 13:02:59,038 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 363 selfloop transitions, 47 changer transitions 0/413 dead transitions. [2024-06-14 13:02:59,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 413 transitions, 6763 flow [2024-06-14 13:02:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:02:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:02:59,040 INFO L175 Difference]: Start difference. First operand has 230 places, 374 transitions, 5767 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:02:59,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 413 transitions, 6763 flow [2024-06-14 13:02:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 413 transitions, 6649 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:59,470 INFO L231 Difference]: Finished difference. Result has 234 places, 377 transitions, 5826 flow [2024-06-14 13:02:59,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5826, PETRI_PLACES=234, PETRI_TRANSITIONS=377} [2024-06-14 13:02:59,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 13:02:59,470 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 377 transitions, 5826 flow [2024-06-14 13:02:59,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:59,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:59,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:59,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:02:59,471 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:59,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash 416671742, now seen corresponding path program 2 times [2024-06-14 13:02:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43891446] [2024-06-14 13:02:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:02,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43891446] [2024-06-14 13:03:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43891446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:02,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:02,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396172801] [2024-06-14 13:03:02,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:02,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 377 transitions, 5826 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:02,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:02,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:02,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:04,695 INFO L124 PetriNetUnfolderBase]: 3596/5404 cut-off events. [2024-06-14 13:03:04,695 INFO L125 PetriNetUnfolderBase]: For 280933/280972 co-relation queries the response was YES. [2024-06-14 13:03:04,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50081 conditions, 5404 events. 3596/5404 cut-off events. For 280933/280972 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27873 event pairs, 744 based on Foata normal form. 40/5439 useless extension candidates. Maximal degree in co-relation 49963. Up to 5182 conditions per place. [2024-06-14 13:03:04,752 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 362 selfloop transitions, 43 changer transitions 0/408 dead transitions. [2024-06-14 13:03:04,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 408 transitions, 6751 flow [2024-06-14 13:03:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:03:04,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-14 13:03:04,754 INFO L175 Difference]: Start difference. First operand has 234 places, 377 transitions, 5826 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:03:04,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 408 transitions, 6751 flow [2024-06-14 13:03:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 408 transitions, 6603 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:05,192 INFO L231 Difference]: Finished difference. Result has 236 places, 379 transitions, 5810 flow [2024-06-14 13:03:05,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5810, PETRI_PLACES=236, PETRI_TRANSITIONS=379} [2024-06-14 13:03:05,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 13:03:05,192 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 379 transitions, 5810 flow [2024-06-14 13:03:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:05,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:05,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:03:05,193 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:05,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 416487044, now seen corresponding path program 5 times [2024-06-14 13:03:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775180084] [2024-06-14 13:03:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775180084] [2024-06-14 13:03:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775180084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:07,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:07,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:07,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102390249] [2024-06-14 13:03:07,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:07,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:07,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:03:07,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 379 transitions, 5810 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:07,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:07,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:03:07,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:09,655 INFO L124 PetriNetUnfolderBase]: 3498/5308 cut-off events. [2024-06-14 13:03:09,655 INFO L125 PetriNetUnfolderBase]: For 318200/318495 co-relation queries the response was YES. [2024-06-14 13:03:09,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50124 conditions, 5308 events. 3498/5308 cut-off events. For 318200/318495 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 27925 event pairs, 660 based on Foata normal form. 69/5293 useless extension candidates. Maximal degree in co-relation 50005. Up to 4784 conditions per place. [2024-06-14 13:03:09,715 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 307 selfloop transitions, 74 changer transitions 0/427 dead transitions. [2024-06-14 13:03:09,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 427 transitions, 7121 flow [2024-06-14 13:03:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:03:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:03:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:03:09,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:03:09,717 INFO L175 Difference]: Start difference. First operand has 236 places, 379 transitions, 5810 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:03:09,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 427 transitions, 7121 flow [2024-06-14 13:03:10,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 427 transitions, 7010 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:10,128 INFO L231 Difference]: Finished difference. Result has 240 places, 381 transitions, 5912 flow [2024-06-14 13:03:10,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5912, PETRI_PLACES=240, PETRI_TRANSITIONS=381} [2024-06-14 13:03:10,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 13:03:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 381 transitions, 5912 flow [2024-06-14 13:03:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:10,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:10,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:03:10,130 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:10,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 416487168, now seen corresponding path program 9 times [2024-06-14 13:03:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:10,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066347720] [2024-06-14 13:03:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066347720] [2024-06-14 13:03:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066347720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:12,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723786500] [2024-06-14 13:03:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:12,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:12,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 381 transitions, 5912 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:12,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:12,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:12,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:14,400 INFO L124 PetriNetUnfolderBase]: 3670/5526 cut-off events. [2024-06-14 13:03:14,401 INFO L125 PetriNetUnfolderBase]: For 298061/298100 co-relation queries the response was YES. [2024-06-14 13:03:14,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51448 conditions, 5526 events. 3670/5526 cut-off events. For 298061/298100 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 28706 event pairs, 739 based on Foata normal form. 40/5561 useless extension candidates. Maximal degree in co-relation 51328. Up to 5085 conditions per place. [2024-06-14 13:03:14,464 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 357 selfloop transitions, 78 changer transitions 0/438 dead transitions. [2024-06-14 13:03:14,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 438 transitions, 7267 flow [2024-06-14 13:03:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:03:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:03:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-14 13:03:14,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-14 13:03:14,466 INFO L175 Difference]: Start difference. First operand has 240 places, 381 transitions, 5912 flow. Second operand 11 states and 178 transitions. [2024-06-14 13:03:14,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 438 transitions, 7267 flow [2024-06-14 13:03:14,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 438 transitions, 7145 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:14,923 INFO L231 Difference]: Finished difference. Result has 246 places, 389 transitions, 6156 flow [2024-06-14 13:03:14,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6156, PETRI_PLACES=246, PETRI_TRANSITIONS=389} [2024-06-14 13:03:14,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:03:14,923 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 389 transitions, 6156 flow [2024-06-14 13:03:14,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:14,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:14,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:03:14,924 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:14,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 644803532, now seen corresponding path program 3 times [2024-06-14 13:03:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:14,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755207122] [2024-06-14 13:03:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:14,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755207122] [2024-06-14 13:03:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755207122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145207145] [2024-06-14 13:03:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:17,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:17,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 389 transitions, 6156 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:17,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:17,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:17,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:19,996 INFO L124 PetriNetUnfolderBase]: 3690/5558 cut-off events. [2024-06-14 13:03:19,996 INFO L125 PetriNetUnfolderBase]: For 310508/310547 co-relation queries the response was YES. [2024-06-14 13:03:20,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52244 conditions, 5558 events. 3690/5558 cut-off events. For 310508/310547 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28924 event pairs, 753 based on Foata normal form. 40/5593 useless extension candidates. Maximal degree in co-relation 52122. Up to 5336 conditions per place. [2024-06-14 13:03:20,063 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 374 selfloop transitions, 43 changer transitions 0/420 dead transitions. [2024-06-14 13:03:20,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 420 transitions, 7111 flow [2024-06-14 13:03:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:03:20,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:03:20,065 INFO L175 Difference]: Start difference. First operand has 246 places, 389 transitions, 6156 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:03:20,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 420 transitions, 7111 flow [2024-06-14 13:03:20,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 420 transitions, 6931 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:20,554 INFO L231 Difference]: Finished difference. Result has 247 places, 391 transitions, 6114 flow [2024-06-14 13:03:20,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6114, PETRI_PLACES=247, PETRI_TRANSITIONS=391} [2024-06-14 13:03:20,555 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 13:03:20,555 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 391 transitions, 6114 flow [2024-06-14 13:03:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:20,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:20,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:20,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:03:20,556 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:20,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 644565948, now seen corresponding path program 10 times [2024-06-14 13:03:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:20,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108889693] [2024-06-14 13:03:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:22,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108889693] [2024-06-14 13:03:22,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108889693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:22,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:22,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:22,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293853150] [2024-06-14 13:03:22,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:22,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:22,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:22,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 391 transitions, 6114 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:22,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:22,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:24,984 INFO L124 PetriNetUnfolderBase]: 3693/5563 cut-off events. [2024-06-14 13:03:24,984 INFO L125 PetriNetUnfolderBase]: For 317588/317627 co-relation queries the response was YES. [2024-06-14 13:03:25,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52289 conditions, 5563 events. 3693/5563 cut-off events. For 317588/317627 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 28906 event pairs, 751 based on Foata normal form. 42/5600 useless extension candidates. Maximal degree in co-relation 52167. Up to 5291 conditions per place. [2024-06-14 13:03:25,049 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 379 selfloop transitions, 58 changer transitions 0/440 dead transitions. [2024-06-14 13:03:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 440 transitions, 7204 flow [2024-06-14 13:03:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:03:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:03:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-14 13:03:25,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:03:25,050 INFO L175 Difference]: Start difference. First operand has 247 places, 391 transitions, 6114 flow. Second operand 11 states and 172 transitions. [2024-06-14 13:03:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 440 transitions, 7204 flow [2024-06-14 13:03:25,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 440 transitions, 7064 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:25,516 INFO L231 Difference]: Finished difference. Result has 253 places, 395 transitions, 6194 flow [2024-06-14 13:03:25,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6194, PETRI_PLACES=253, PETRI_TRANSITIONS=395} [2024-06-14 13:03:25,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 13:03:25,516 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 395 transitions, 6194 flow [2024-06-14 13:03:25,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:25,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:25,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:25,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:03:25,517 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:25,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 653143772, now seen corresponding path program 4 times [2024-06-14 13:03:25,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:25,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403364115] [2024-06-14 13:03:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:28,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403364115] [2024-06-14 13:03:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403364115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:28,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799022913] [2024-06-14 13:03:28,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:28,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:28,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 395 transitions, 6194 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:28,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:28,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:28,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:30,203 INFO L124 PetriNetUnfolderBase]: 3685/5551 cut-off events. [2024-06-14 13:03:30,204 INFO L125 PetriNetUnfolderBase]: For 320350/320389 co-relation queries the response was YES. [2024-06-14 13:03:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52266 conditions, 5551 events. 3685/5551 cut-off events. For 320350/320389 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28826 event pairs, 690 based on Foata normal form. 40/5586 useless extension candidates. Maximal degree in co-relation 52143. Up to 5235 conditions per place. [2024-06-14 13:03:30,272 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 49 changer transitions 0/427 dead transitions. [2024-06-14 13:03:30,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 427 transitions, 7169 flow [2024-06-14 13:03:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:03:30,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:03:30,274 INFO L175 Difference]: Start difference. First operand has 253 places, 395 transitions, 6194 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:03:30,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 427 transitions, 7169 flow [2024-06-14 13:03:30,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 427 transitions, 7027 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:30,756 INFO L231 Difference]: Finished difference. Result has 255 places, 397 transitions, 6206 flow [2024-06-14 13:03:30,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6206, PETRI_PLACES=255, PETRI_TRANSITIONS=397} [2024-06-14 13:03:30,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-14 13:03:30,756 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 397 transitions, 6206 flow [2024-06-14 13:03:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:30,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:30,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:30,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:03:30,757 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1777306034, now seen corresponding path program 6 times [2024-06-14 13:03:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20682385] [2024-06-14 13:03:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:33,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:33,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20682385] [2024-06-14 13:03:33,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20682385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:33,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:33,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:33,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625708468] [2024-06-14 13:03:33,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:33,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:03:33,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 397 transitions, 6206 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:33,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:33,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:03:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:35,280 INFO L124 PetriNetUnfolderBase]: 3826/5835 cut-off events. [2024-06-14 13:03:35,280 INFO L125 PetriNetUnfolderBase]: For 361383/361636 co-relation queries the response was YES. [2024-06-14 13:03:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55617 conditions, 5835 events. 3826/5835 cut-off events. For 361383/361636 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 31793 event pairs, 729 based on Foata normal form. 39/5758 useless extension candidates. Maximal degree in co-relation 55493. Up to 5074 conditions per place. [2024-06-14 13:03:35,339 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 310 selfloop transitions, 151 changer transitions 0/514 dead transitions. [2024-06-14 13:03:35,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 514 transitions, 8476 flow [2024-06-14 13:03:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 13:03:35,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:03:35,341 INFO L175 Difference]: Start difference. First operand has 255 places, 397 transitions, 6206 flow. Second operand 10 states and 185 transitions. [2024-06-14 13:03:35,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 514 transitions, 8476 flow [2024-06-14 13:03:35,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 514 transitions, 8335 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:35,810 INFO L231 Difference]: Finished difference. Result has 263 places, 461 transitions, 7720 flow [2024-06-14 13:03:35,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7720, PETRI_PLACES=263, PETRI_TRANSITIONS=461} [2024-06-14 13:03:35,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 13:03:35,811 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 461 transitions, 7720 flow [2024-06-14 13:03:35,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:35,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:35,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:35,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:03:35,811 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:35,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1267417932, now seen corresponding path program 7 times [2024-06-14 13:03:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:35,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344219138] [2024-06-14 13:03:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344219138] [2024-06-14 13:03:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344219138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508498789] [2024-06-14 13:03:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:38,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:03:38,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 461 transitions, 7720 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) [2024-06-14 13:03:38,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:38,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:03:38,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:40,085 INFO L124 PetriNetUnfolderBase]: 4266/6526 cut-off events. [2024-06-14 13:03:40,086 INFO L125 PetriNetUnfolderBase]: For 397558/397940 co-relation queries the response was YES. [2024-06-14 13:03:40,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63168 conditions, 6526 events. 4266/6526 cut-off events. For 397558/397940 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36649 event pairs, 687 based on Foata normal form. 65/6413 useless extension candidates. Maximal degree in co-relation 63039. Up to 5121 conditions per place. [2024-06-14 13:03:40,162 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 282 selfloop transitions, 289 changer transitions 0/624 dead transitions. [2024-06-14 13:03:40,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 624 transitions, 11383 flow [2024-06-14 13:03:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:03:40,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:03:40,164 INFO L175 Difference]: Start difference. First operand has 263 places, 461 transitions, 7720 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:03:40,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 624 transitions, 11383 flow [2024-06-14 13:03:40,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 624 transitions, 10914 flow, removed 161 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:40,921 INFO L231 Difference]: Finished difference. Result has 271 places, 553 transitions, 9697 flow [2024-06-14 13:03:40,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7377, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9697, PETRI_PLACES=271, PETRI_TRANSITIONS=553} [2024-06-14 13:03:40,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 13:03:40,922 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 553 transitions, 9697 flow [2024-06-14 13:03:40,922 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) [2024-06-14 13:03:40,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:40,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:03:40,923 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:40,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2085856534, now seen corresponding path program 8 times [2024-06-14 13:03:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:40,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598188194] [2024-06-14 13:03:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:40,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:42,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:42,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598188194] [2024-06-14 13:03:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598188194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:42,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:42,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:42,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848503134] [2024-06-14 13:03:42,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:42,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:42,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:03:42,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 553 transitions, 9697 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:42,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:42,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:03:42,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:45,333 INFO L124 PetriNetUnfolderBase]: 4540/6994 cut-off events. [2024-06-14 13:03:45,333 INFO L125 PetriNetUnfolderBase]: For 439061/439735 co-relation queries the response was YES. [2024-06-14 13:03:45,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68705 conditions, 6994 events. 4540/6994 cut-off events. For 439061/439735 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40219 event pairs, 513 based on Foata normal form. 126/6961 useless extension candidates. Maximal degree in co-relation 68573. Up to 4988 conditions per place. [2024-06-14 13:03:45,424 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 288 selfloop transitions, 331 changer transitions 0/672 dead transitions. [2024-06-14 13:03:45,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 672 transitions, 12661 flow [2024-06-14 13:03:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 13:03:45,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 13:03:45,426 INFO L175 Difference]: Start difference. First operand has 271 places, 553 transitions, 9697 flow. Second operand 10 states and 198 transitions. [2024-06-14 13:03:45,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 672 transitions, 12661 flow [2024-06-14 13:03:46,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 672 transitions, 12184 flow, removed 192 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:46,392 INFO L231 Difference]: Finished difference. Result has 282 places, 607 transitions, 11353 flow [2024-06-14 13:03:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9368, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11353, PETRI_PLACES=282, PETRI_TRANSITIONS=607} [2024-06-14 13:03:46,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 13:03:46,392 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 607 transitions, 11353 flow [2024-06-14 13:03:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:46,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:46,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:03:46,393 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)] === [2024-06-14 13:03:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1687229899, now seen corresponding path program 1 times [2024-06-14 13:03:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306135762] [2024-06-14 13:03:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:47,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:47,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306135762] [2024-06-14 13:03:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306135762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:47,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:47,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:03:47,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862208867] [2024-06-14 13:03:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:03:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:03:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:03:47,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:47,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 607 transitions, 11353 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 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) [2024-06-14 13:03:47,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:47,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:47,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:50,110 INFO L124 PetriNetUnfolderBase]: 4882/7405 cut-off events. [2024-06-14 13:03:50,110 INFO L125 PetriNetUnfolderBase]: For 434051/434090 co-relation queries the response was YES. [2024-06-14 13:03:50,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 7405 events. 4882/7405 cut-off events. For 434051/434090 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41978 event pairs, 1214 based on Foata normal form. 40/7440 useless extension candidates. Maximal degree in co-relation 72889. Up to 7261 conditions per place. [2024-06-14 13:03:50,191 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 584 selfloop transitions, 29 changer transitions 0/616 dead transitions. [2024-06-14 13:03:50,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 616 transitions, 12609 flow [2024-06-14 13:03:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:03:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:03:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-14 13:03:50,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:03:50,192 INFO L175 Difference]: Start difference. First operand has 282 places, 607 transitions, 11353 flow. Second operand 5 states and 83 transitions. [2024-06-14 13:03:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 616 transitions, 12609 flow [2024-06-14 13:03:51,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 616 transitions, 12238 flow, removed 137 selfloop flow, removed 4 redundant places. [2024-06-14 13:03:51,026 INFO L231 Difference]: Finished difference. Result has 283 places, 607 transitions, 11053 flow [2024-06-14 13:03:51,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10982, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11053, PETRI_PLACES=283, PETRI_TRANSITIONS=607} [2024-06-14 13:03:51,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 13:03:51,027 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 607 transitions, 11053 flow [2024-06-14 13:03:51,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 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) [2024-06-14 13:03:51,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:51,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:51,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:03:51,027 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:51,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1597910563, now seen corresponding path program 1 times [2024-06-14 13:03:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:51,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680253691] [2024-06-14 13:03:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680253691] [2024-06-14 13:03:53,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680253691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:53,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:53,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:03:53,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898258494] [2024-06-14 13:03:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:53,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:03:53,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:53,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:03:53,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:03:53,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 607 transitions, 11053 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:53,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:57,031 INFO L124 PetriNetUnfolderBase]: 5074/7707 cut-off events. [2024-06-14 13:03:57,031 INFO L125 PetriNetUnfolderBase]: For 478011/478059 co-relation queries the response was YES. [2024-06-14 13:03:57,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74863 conditions, 7707 events. 5074/7707 cut-off events. For 478011/478059 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44189 event pairs, 703 based on Foata normal form. 56/7758 useless extension candidates. Maximal degree in co-relation 74724. Up to 5187 conditions per place. [2024-06-14 13:03:57,123 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 551 selfloop transitions, 167 changer transitions 0/721 dead transitions. [2024-06-14 13:03:57,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 721 transitions, 13898 flow [2024-06-14 13:03:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 13:03:57,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 13:03:57,128 INFO L175 Difference]: Start difference. First operand has 283 places, 607 transitions, 11053 flow. Second operand 10 states and 187 transitions. [2024-06-14 13:03:57,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 721 transitions, 13898 flow [2024-06-14 13:03:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 721 transitions, 13773 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:58,163 INFO L231 Difference]: Finished difference. Result has 290 places, 633 transitions, 11821 flow [2024-06-14 13:03:58,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10942, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11821, PETRI_PLACES=290, PETRI_TRANSITIONS=633} [2024-06-14 13:03:58,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 13:03:58,164 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 633 transitions, 11821 flow [2024-06-14 13:03:58,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:58,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:58,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:58,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:03:58,164 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:58,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash -441761407, now seen corresponding path program 2 times [2024-06-14 13:03:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:58,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339130953] [2024-06-14 13:03:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:01,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339130953] [2024-06-14 13:04:01,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339130953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:01,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:01,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936585433] [2024-06-14 13:04:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:01,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:01,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:01,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:01,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 633 transitions, 11821 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:01,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:01,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:01,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:04,236 INFO L124 PetriNetUnfolderBase]: 5266/8035 cut-off events. [2024-06-14 13:04:04,237 INFO L125 PetriNetUnfolderBase]: For 526546/526594 co-relation queries the response was YES. [2024-06-14 13:04:04,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79702 conditions, 8035 events. 5266/8035 cut-off events. For 526546/526594 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46965 event pairs, 1049 based on Foata normal form. 56/8086 useless extension candidates. Maximal degree in co-relation 79562. Up to 6501 conditions per place. [2024-06-14 13:04:04,338 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 557 selfloop transitions, 153 changer transitions 0/713 dead transitions. [2024-06-14 13:04:04,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 713 transitions, 14149 flow [2024-06-14 13:04:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 13:04:04,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 13:04:04,340 INFO L175 Difference]: Start difference. First operand has 290 places, 633 transitions, 11821 flow. Second operand 10 states and 188 transitions. [2024-06-14 13:04:04,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 713 transitions, 14149 flow [2024-06-14 13:04:05,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 713 transitions, 13854 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:05,802 INFO L231 Difference]: Finished difference. Result has 294 places, 644 transitions, 12083 flow [2024-06-14 13:04:05,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11530, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12083, PETRI_PLACES=294, PETRI_TRANSITIONS=644} [2024-06-14 13:04:05,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:04:05,803 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 644 transitions, 12083 flow [2024-06-14 13:04:05,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:05,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:05,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:05,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:04:05,803 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:05,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash -441757687, now seen corresponding path program 3 times [2024-06-14 13:04:05,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849607886] [2024-06-14 13:04:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849607886] [2024-06-14 13:04:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849607886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:10,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:10,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133605904] [2024-06-14 13:04:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:10,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:10,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 644 transitions, 12083 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:10,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:10,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:10,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:13,164 INFO L124 PetriNetUnfolderBase]: 5250/8022 cut-off events. [2024-06-14 13:04:13,164 INFO L125 PetriNetUnfolderBase]: For 524382/524422 co-relation queries the response was YES. [2024-06-14 13:04:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78241 conditions, 8022 events. 5250/8022 cut-off events. For 524382/524422 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 46862 event pairs, 1099 based on Foata normal form. 58/8078 useless extension candidates. Maximal degree in co-relation 78101. Up to 7309 conditions per place. [2024-06-14 13:04:13,263 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 629 selfloop transitions, 73 changer transitions 0/705 dead transitions. [2024-06-14 13:04:13,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 705 transitions, 13827 flow [2024-06-14 13:04:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:04:13,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 13:04:13,265 INFO L175 Difference]: Start difference. First operand has 294 places, 644 transitions, 12083 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:04:13,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 705 transitions, 13827 flow [2024-06-14 13:04:14,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 705 transitions, 13596 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:14,700 INFO L231 Difference]: Finished difference. Result has 299 places, 647 transitions, 12110 flow [2024-06-14 13:04:14,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11862, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12110, PETRI_PLACES=299, PETRI_TRANSITIONS=647} [2024-06-14 13:04:14,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-14 13:04:14,701 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 647 transitions, 12110 flow [2024-06-14 13:04:14,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:14,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:14,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:04:14,701 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -354921727, now seen corresponding path program 4 times [2024-06-14 13:04:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666565101] [2024-06-14 13:04:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:18,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666565101] [2024-06-14 13:04:18,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666565101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:18,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:18,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:18,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255017162] [2024-06-14 13:04:18,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:18,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:18,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:18,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:18,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 647 transitions, 12110 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:18,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:18,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:18,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:21,345 INFO L124 PetriNetUnfolderBase]: 5338/8152 cut-off events. [2024-06-14 13:04:21,345 INFO L125 PetriNetUnfolderBase]: For 530189/530234 co-relation queries the response was YES. [2024-06-14 13:04:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79479 conditions, 8152 events. 5338/8152 cut-off events. For 530189/530234 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 47752 event pairs, 1081 based on Foata normal form. 58/8206 useless extension candidates. Maximal degree in co-relation 79337. Up to 7431 conditions per place. [2024-06-14 13:04:21,456 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 619 selfloop transitions, 82 changer transitions 0/704 dead transitions. [2024-06-14 13:04:21,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 704 transitions, 13788 flow [2024-06-14 13:04:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:04:21,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:04:21,457 INFO L175 Difference]: Start difference. First operand has 299 places, 647 transitions, 12110 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:04:21,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 704 transitions, 13788 flow [2024-06-14 13:04:22,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 704 transitions, 13556 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:22,754 INFO L231 Difference]: Finished difference. Result has 301 places, 648 transitions, 12083 flow [2024-06-14 13:04:22,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11878, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12083, PETRI_PLACES=301, PETRI_TRANSITIONS=648} [2024-06-14 13:04:22,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 13:04:22,755 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 648 transitions, 12083 flow [2024-06-14 13:04:22,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:22,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:22,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:22,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:04:22,756 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:22,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1198045589, now seen corresponding path program 5 times [2024-06-14 13:04:22,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:22,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117060368] [2024-06-14 13:04:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117060368] [2024-06-14 13:04:26,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117060368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:26,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:26,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215076791] [2024-06-14 13:04:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:26,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:26,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:26,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 648 transitions, 12083 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:26,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:26,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:29,587 INFO L124 PetriNetUnfolderBase]: 5474/8394 cut-off events. [2024-06-14 13:04:29,588 INFO L125 PetriNetUnfolderBase]: For 562375/562409 co-relation queries the response was YES. [2024-06-14 13:04:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81276 conditions, 8394 events. 5474/8394 cut-off events. For 562375/562409 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 49796 event pairs, 1179 based on Foata normal form. 44/8436 useless extension candidates. Maximal degree in co-relation 81135. Up to 7431 conditions per place. [2024-06-14 13:04:29,683 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 665 selfloop transitions, 47 changer transitions 0/715 dead transitions. [2024-06-14 13:04:29,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 715 transitions, 14123 flow [2024-06-14 13:04:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:04:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:04:29,685 INFO L175 Difference]: Start difference. First operand has 301 places, 648 transitions, 12083 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:04:29,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 715 transitions, 14123 flow [2024-06-14 13:04:30,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 715 transitions, 13994 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:30,930 INFO L231 Difference]: Finished difference. Result has 306 places, 654 transitions, 12211 flow [2024-06-14 13:04:30,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11954, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12211, PETRI_PLACES=306, PETRI_TRANSITIONS=654} [2024-06-14 13:04:30,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 13:04:30,931 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 654 transitions, 12211 flow [2024-06-14 13:04:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:30,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:30,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:30,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:04:30,932 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:30,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1198049309, now seen corresponding path program 6 times [2024-06-14 13:04:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885418497] [2024-06-14 13:04:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885418497] [2024-06-14 13:04:34,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885418497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:34,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:34,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786220001] [2024-06-14 13:04:34,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:34,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:34,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:34,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 654 transitions, 12211 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:34,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:34,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:34,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:37,708 INFO L124 PetriNetUnfolderBase]: 5506/8458 cut-off events. [2024-06-14 13:04:37,708 INFO L125 PetriNetUnfolderBase]: For 573967/574001 co-relation queries the response was YES. [2024-06-14 13:04:37,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81493 conditions, 8458 events. 5506/8458 cut-off events. For 573967/574001 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 50444 event pairs, 1253 based on Foata normal form. 48/8504 useless extension candidates. Maximal degree in co-relation 81350. Up to 7941 conditions per place. [2024-06-14 13:04:37,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 664 selfloop transitions, 44 changer transitions 0/711 dead transitions. [2024-06-14 13:04:37,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 711 transitions, 13906 flow [2024-06-14 13:04:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:04:37,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:04:37,823 INFO L175 Difference]: Start difference. First operand has 306 places, 654 transitions, 12211 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:04:37,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 711 transitions, 13906 flow [2024-06-14 13:04:39,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 711 transitions, 13828 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:39,270 INFO L231 Difference]: Finished difference. Result has 311 places, 655 transitions, 12267 flow [2024-06-14 13:04:39,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12135, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12267, PETRI_PLACES=311, PETRI_TRANSITIONS=655} [2024-06-14 13:04:39,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:04:39,270 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 655 transitions, 12267 flow [2024-06-14 13:04:39,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:39,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:39,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:39,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:04:39,271 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:39,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1075862753, now seen corresponding path program 7 times [2024-06-14 13:04:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:39,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179427078] [2024-06-14 13:04:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:39,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179427078] [2024-06-14 13:04:42,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179427078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:42,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:42,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:42,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618590321] [2024-06-14 13:04:42,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:42,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:42,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:42,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:42,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 655 transitions, 12267 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:42,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:42,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:42,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:45,534 INFO L124 PetriNetUnfolderBase]: 5662/8729 cut-off events. [2024-06-14 13:04:45,535 INFO L125 PetriNetUnfolderBase]: For 621022/621043 co-relation queries the response was YES. [2024-06-14 13:04:45,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83569 conditions, 8729 events. 5662/8729 cut-off events. For 621022/621043 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 52670 event pairs, 1363 based on Foata normal form. 56/8781 useless extension candidates. Maximal degree in co-relation 83424. Up to 8130 conditions per place. [2024-06-14 13:04:45,657 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 650 selfloop transitions, 55 changer transitions 0/708 dead transitions. [2024-06-14 13:04:45,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 708 transitions, 14001 flow [2024-06-14 13:04:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 13:04:45,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-14 13:04:45,663 INFO L175 Difference]: Start difference. First operand has 311 places, 655 transitions, 12267 flow. Second operand 10 states and 169 transitions. [2024-06-14 13:04:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 708 transitions, 14001 flow [2024-06-14 13:04:47,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 708 transitions, 13902 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:47,245 INFO L231 Difference]: Finished difference. Result has 313 places, 657 transitions, 12360 flow [2024-06-14 13:04:47,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12168, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12360, PETRI_PLACES=313, PETRI_TRANSITIONS=657} [2024-06-14 13:04:47,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-14 13:04:47,246 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 657 transitions, 12360 flow [2024-06-14 13:04:47,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:47,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:47,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:47,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:04:47,246 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:47,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash -921196957, now seen corresponding path program 8 times [2024-06-14 13:04:47,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:47,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894690464] [2024-06-14 13:04:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:47,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894690464] [2024-06-14 13:04:49,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894690464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:49,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:49,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261045301] [2024-06-14 13:04:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:49,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:49,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 657 transitions, 12360 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:49,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:49,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:53,142 INFO L124 PetriNetUnfolderBase]: 5854/9046 cut-off events. [2024-06-14 13:04:53,142 INFO L125 PetriNetUnfolderBase]: For 644419/644440 co-relation queries the response was YES. [2024-06-14 13:04:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87052 conditions, 9046 events. 5854/9046 cut-off events. For 644419/644440 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 55239 event pairs, 1353 based on Foata normal form. 36/9078 useless extension candidates. Maximal degree in co-relation 86906. Up to 7920 conditions per place. [2024-06-14 13:04:53,267 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 647 selfloop transitions, 79 changer transitions 0/729 dead transitions. [2024-06-14 13:04:53,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 729 transitions, 14502 flow [2024-06-14 13:04:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 13:04:53,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:04:53,269 INFO L175 Difference]: Start difference. First operand has 313 places, 657 transitions, 12360 flow. Second operand 11 states and 187 transitions. [2024-06-14 13:04:53,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 729 transitions, 14502 flow [2024-06-14 13:04:54,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 729 transitions, 14273 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 13:04:54,878 INFO L231 Difference]: Finished difference. Result has 315 places, 666 transitions, 12513 flow [2024-06-14 13:04:54,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12131, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12513, PETRI_PLACES=315, PETRI_TRANSITIONS=666} [2024-06-14 13:04:54,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 13:04:54,879 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 666 transitions, 12513 flow [2024-06-14 13:04:54,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:54,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:54,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:54,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:04:54,879 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:54,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -921193237, now seen corresponding path program 9 times [2024-06-14 13:04:54,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:54,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736754504] [2024-06-14 13:04:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:57,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:57,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736754504] [2024-06-14 13:04:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736754504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:57,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338663458] [2024-06-14 13:04:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:57,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:57,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 666 transitions, 12513 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:57,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:57,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:57,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:00,718 INFO L124 PetriNetUnfolderBase]: 5942/9200 cut-off events. [2024-06-14 13:05:00,719 INFO L125 PetriNetUnfolderBase]: For 671776/671797 co-relation queries the response was YES. [2024-06-14 13:05:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88499 conditions, 9200 events. 5942/9200 cut-off events. For 671776/671797 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56594 event pairs, 1417 based on Foata normal form. 40/9236 useless extension candidates. Maximal degree in co-relation 88351. Up to 8560 conditions per place. [2024-06-14 13:05:00,865 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 646 selfloop transitions, 75 changer transitions 0/724 dead transitions. [2024-06-14 13:05:00,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 724 transitions, 14243 flow [2024-06-14 13:05:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-14 13:05:00,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386892177589852 [2024-06-14 13:05:00,866 INFO L175 Difference]: Start difference. First operand has 315 places, 666 transitions, 12513 flow. Second operand 11 states and 183 transitions. [2024-06-14 13:05:00,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 724 transitions, 14243 flow [2024-06-14 13:05:02,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 724 transitions, 14135 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:02,707 INFO L231 Difference]: Finished difference. Result has 319 places, 667 transitions, 12602 flow [2024-06-14 13:05:02,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12407, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12602, PETRI_PLACES=319, PETRI_TRANSITIONS=667} [2024-06-14 13:05:02,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-14 13:05:02,708 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 667 transitions, 12602 flow [2024-06-14 13:05:02,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:02,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:02,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:05:02,708 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:02,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash 482614813, now seen corresponding path program 10 times [2024-06-14 13:05:02,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:02,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050449376] [2024-06-14 13:05:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050449376] [2024-06-14 13:05:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050449376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:05,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:05,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364693084] [2024-06-14 13:05:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:05,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 667 transitions, 12602 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:08,909 INFO L124 PetriNetUnfolderBase]: 5906/9142 cut-off events. [2024-06-14 13:05:08,909 INFO L125 PetriNetUnfolderBase]: For 656415/656439 co-relation queries the response was YES. [2024-06-14 13:05:08,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87432 conditions, 9142 events. 5906/9142 cut-off events. For 656415/656439 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56127 event pairs, 1442 based on Foata normal form. 42/9179 useless extension candidates. Maximal degree in co-relation 87282. Up to 8639 conditions per place. [2024-06-14 13:05:09,038 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 655 selfloop transitions, 58 changer transitions 0/716 dead transitions. [2024-06-14 13:05:09,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 716 transitions, 14275 flow [2024-06-14 13:05:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:05:09,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:05:09,040 INFO L175 Difference]: Start difference. First operand has 319 places, 667 transitions, 12602 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:05:09,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 716 transitions, 14275 flow [2024-06-14 13:05:11,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 716 transitions, 14124 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:11,073 INFO L231 Difference]: Finished difference. Result has 321 places, 668 transitions, 12616 flow [2024-06-14 13:05:11,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12461, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12616, PETRI_PLACES=321, PETRI_TRANSITIONS=668} [2024-06-14 13:05:11,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 13:05:11,073 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 668 transitions, 12616 flow [2024-06-14 13:05:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:11,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:11,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:11,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:05:11,074 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:11,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -915471505, now seen corresponding path program 1 times [2024-06-14 13:05:11,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889420793] [2024-06-14 13:05:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:14,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889420793] [2024-06-14 13:05:14,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889420793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:14,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:14,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267028578] [2024-06-14 13:05:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:14,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 668 transitions, 12616 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:14,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:14,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:14,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:17,763 INFO L124 PetriNetUnfolderBase]: 5926/9174 cut-off events. [2024-06-14 13:05:17,763 INFO L125 PetriNetUnfolderBase]: For 645632/645656 co-relation queries the response was YES. [2024-06-14 13:05:17,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87700 conditions, 9174 events. 5926/9174 cut-off events. For 645632/645656 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 56469 event pairs, 1426 based on Foata normal form. 26/9195 useless extension candidates. Maximal degree in co-relation 87549. Up to 8851 conditions per place. [2024-06-14 13:05:17,873 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 658 selfloop transitions, 48 changer transitions 0/709 dead transitions. [2024-06-14 13:05:17,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 709 transitions, 14236 flow [2024-06-14 13:05:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:05:17,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 13:05:17,875 INFO L175 Difference]: Start difference. First operand has 321 places, 668 transitions, 12616 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:05:17,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 709 transitions, 14236 flow [2024-06-14 13:05:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 709 transitions, 14121 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:19,431 INFO L231 Difference]: Finished difference. Result has 322 places, 670 transitions, 12681 flow [2024-06-14 13:05:19,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12501, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12681, PETRI_PLACES=322, PETRI_TRANSITIONS=670} [2024-06-14 13:05:19,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 13:05:19,432 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 670 transitions, 12681 flow [2024-06-14 13:05:19,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:19,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:19,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:19,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:05:19,432 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:19,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1776424721, now seen corresponding path program 2 times [2024-06-14 13:05:19,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:19,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141451468] [2024-06-14 13:05:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:19,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:22,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141451468] [2024-06-14 13:05:22,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141451468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:22,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237411993] [2024-06-14 13:05:22,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:22,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:22,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:22,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 670 transitions, 12681 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:22,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:22,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:22,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:25,812 INFO L124 PetriNetUnfolderBase]: 5946/9206 cut-off events. [2024-06-14 13:05:25,813 INFO L125 PetriNetUnfolderBase]: For 663052/663076 co-relation queries the response was YES. [2024-06-14 13:05:25,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88394 conditions, 9206 events. 5946/9206 cut-off events. For 663052/663076 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 56666 event pairs, 1442 based on Foata normal form. 26/9227 useless extension candidates. Maximal degree in co-relation 88242. Up to 8872 conditions per place. [2024-06-14 13:05:25,927 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 654 selfloop transitions, 53 changer transitions 0/710 dead transitions. [2024-06-14 13:05:25,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 710 transitions, 14302 flow [2024-06-14 13:05:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:05:25,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:05:25,929 INFO L175 Difference]: Start difference. First operand has 322 places, 670 transitions, 12681 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:05:25,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 710 transitions, 14302 flow [2024-06-14 13:05:27,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 710 transitions, 14143 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:27,883 INFO L231 Difference]: Finished difference. Result has 324 places, 672 transitions, 12714 flow [2024-06-14 13:05:27,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12522, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12714, PETRI_PLACES=324, PETRI_TRANSITIONS=672} [2024-06-14 13:05:27,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 13:05:27,884 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 672 transitions, 12714 flow [2024-06-14 13:05:27,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:27,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:27,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:05:27,885 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:27,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash 724907359, now seen corresponding path program 3 times [2024-06-14 13:05:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:27,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434529051] [2024-06-14 13:05:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:27,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434529051] [2024-06-14 13:05:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434529051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:31,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48574572] [2024-06-14 13:05:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:31,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:31,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:31,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 672 transitions, 12714 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:31,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:31,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:31,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:34,489 INFO L124 PetriNetUnfolderBase]: 5966/9236 cut-off events. [2024-06-14 13:05:34,489 INFO L125 PetriNetUnfolderBase]: For 686661/686700 co-relation queries the response was YES. [2024-06-14 13:05:34,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88983 conditions, 9236 events. 5966/9236 cut-off events. For 686661/686700 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 56816 event pairs, 1444 based on Foata normal form. 40/9271 useless extension candidates. Maximal degree in co-relation 88830. Up to 8904 conditions per place. [2024-06-14 13:05:34,623 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 656 selfloop transitions, 51 changer transitions 0/710 dead transitions. [2024-06-14 13:05:34,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 710 transitions, 14338 flow [2024-06-14 13:05:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:05:34,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:05:34,625 INFO L175 Difference]: Start difference. First operand has 324 places, 672 transitions, 12714 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:05:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 710 transitions, 14338 flow [2024-06-14 13:05:36,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 710 transitions, 14166 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:36,896 INFO L231 Difference]: Finished difference. Result has 326 places, 674 transitions, 12734 flow [2024-06-14 13:05:36,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12542, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12734, PETRI_PLACES=326, PETRI_TRANSITIONS=674} [2024-06-14 13:05:36,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 13:05:36,897 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 674 transitions, 12734 flow [2024-06-14 13:05:36,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:36,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:36,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:36,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:05:36,898 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:36,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1634772459, now seen corresponding path program 11 times [2024-06-14 13:05:36,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:36,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848577203] [2024-06-14 13:05:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:36,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848577203] [2024-06-14 13:05:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848577203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:39,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:39,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:39,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123726843] [2024-06-14 13:05:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:39,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:39,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:39,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 674 transitions, 12734 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:39,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:39,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:39,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:42,836 INFO L124 PetriNetUnfolderBase]: 6049/9377 cut-off events. [2024-06-14 13:05:42,836 INFO L125 PetriNetUnfolderBase]: For 736482/736521 co-relation queries the response was YES. [2024-06-14 13:05:42,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89944 conditions, 9377 events. 6049/9377 cut-off events. For 736482/736521 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 57978 event pairs, 1456 based on Foata normal form. 58/9430 useless extension candidates. Maximal degree in co-relation 89790. Up to 8876 conditions per place. [2024-06-14 13:05:42,973 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 673 selfloop transitions, 60 changer transitions 0/736 dead transitions. [2024-06-14 13:05:42,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 736 transitions, 14499 flow [2024-06-14 13:05:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:05:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:05:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-14 13:05:42,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685152057245081 [2024-06-14 13:05:42,975 INFO L175 Difference]: Start difference. First operand has 326 places, 674 transitions, 12734 flow. Second operand 13 states and 206 transitions. [2024-06-14 13:05:42,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 736 transitions, 14499 flow [2024-06-14 13:05:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 736 transitions, 14291 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:44,973 INFO L231 Difference]: Finished difference. Result has 333 places, 675 transitions, 12707 flow [2024-06-14 13:05:44,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12526, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12707, PETRI_PLACES=333, PETRI_TRANSITIONS=675} [2024-06-14 13:05:44,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:05:44,974 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 675 transitions, 12707 flow [2024-06-14 13:05:44,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:44,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:44,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:44,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:05:44,974 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:44,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:44,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1634987661, now seen corresponding path program 4 times [2024-06-14 13:05:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:44,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395898623] [2024-06-14 13:05:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:44,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:47,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:47,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395898623] [2024-06-14 13:05:47,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395898623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:47,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:47,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:47,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009859850] [2024-06-14 13:05:47,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:47,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:47,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:47,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 675 transitions, 12707 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:47,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:47,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:47,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:50,889 INFO L124 PetriNetUnfolderBase]: 6069/9409 cut-off events. [2024-06-14 13:05:50,889 INFO L125 PetriNetUnfolderBase]: For 738821/738860 co-relation queries the response was YES. [2024-06-14 13:05:50,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90732 conditions, 9409 events. 6069/9409 cut-off events. For 738821/738860 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 58265 event pairs, 1480 based on Foata normal form. 40/9444 useless extension candidates. Maximal degree in co-relation 90576. Up to 9088 conditions per place. [2024-06-14 13:05:51,024 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 664 selfloop transitions, 46 changer transitions 0/713 dead transitions. [2024-06-14 13:05:51,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 713 transitions, 14335 flow [2024-06-14 13:05:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:05:51,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 13:05:51,026 INFO L175 Difference]: Start difference. First operand has 333 places, 675 transitions, 12707 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:05:51,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 713 transitions, 14335 flow [2024-06-14 13:05:53,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 713 transitions, 14179 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 13:05:53,252 INFO L231 Difference]: Finished difference. Result has 330 places, 677 transitions, 12735 flow [2024-06-14 13:05:53,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12551, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12735, PETRI_PLACES=330, PETRI_TRANSITIONS=677} [2024-06-14 13:05:53,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 13:05:53,253 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 677 transitions, 12735 flow [2024-06-14 13:05:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:53,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:53,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:05:53,254 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1629416031, now seen corresponding path program 5 times [2024-06-14 13:05:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408923173] [2024-06-14 13:05:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408923173] [2024-06-14 13:05:56,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408923173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:56,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989770743] [2024-06-14 13:05:56,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:56,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 677 transitions, 12735 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:59,359 INFO L124 PetriNetUnfolderBase]: 6089/9441 cut-off events. [2024-06-14 13:05:59,359 INFO L125 PetriNetUnfolderBase]: For 760052/760091 co-relation queries the response was YES. [2024-06-14 13:05:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91268 conditions, 9441 events. 6089/9441 cut-off events. For 760052/760091 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 58465 event pairs, 1447 based on Foata normal form. 40/9476 useless extension candidates. Maximal degree in co-relation 91111. Up to 9031 conditions per place. [2024-06-14 13:05:59,503 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 649 selfloop transitions, 65 changer transitions 0/717 dead transitions. [2024-06-14 13:05:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 717 transitions, 14390 flow [2024-06-14 13:05:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:05:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:05:59,504 INFO L175 Difference]: Start difference. First operand has 330 places, 677 transitions, 12735 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:05:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 717 transitions, 14390 flow [2024-06-14 13:06:01,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 717 transitions, 14227 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:01,988 INFO L231 Difference]: Finished difference. Result has 332 places, 679 transitions, 12797 flow [2024-06-14 13:06:01,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12572, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12797, PETRI_PLACES=332, PETRI_TRANSITIONS=679} [2024-06-14 13:06:01,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:06:01,989 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 679 transitions, 12797 flow [2024-06-14 13:06:01,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:01,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:01,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:06:01,990 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:01,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1629410079, now seen corresponding path program 12 times [2024-06-14 13:06:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:01,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720718487] [2024-06-14 13:06:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720718487] [2024-06-14 13:06:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720718487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:04,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:04,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899472688] [2024-06-14 13:06:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:04,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:04,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 679 transitions, 12797 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:04,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:08,025 INFO L124 PetriNetUnfolderBase]: 6177/9589 cut-off events. [2024-06-14 13:06:08,025 INFO L125 PetriNetUnfolderBase]: For 815053/815092 co-relation queries the response was YES. [2024-06-14 13:06:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92547 conditions, 9589 events. 6177/9589 cut-off events. For 815053/815092 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59693 event pairs, 1459 based on Foata normal form. 56/9640 useless extension candidates. Maximal degree in co-relation 92389. Up to 9027 conditions per place. [2024-06-14 13:06:08,182 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 656 selfloop transitions, 69 changer transitions 0/728 dead transitions. [2024-06-14 13:06:08,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 728 transitions, 14505 flow [2024-06-14 13:06:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:06:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:06:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-14 13:06:08,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657505285412262 [2024-06-14 13:06:08,184 INFO L175 Difference]: Start difference. First operand has 332 places, 679 transitions, 12797 flow. Second operand 11 states and 173 transitions. [2024-06-14 13:06:08,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 728 transitions, 14505 flow [2024-06-14 13:06:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 728 transitions, 14298 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:10,351 INFO L231 Difference]: Finished difference. Result has 336 places, 680 transitions, 12776 flow [2024-06-14 13:06:10,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12590, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12776, PETRI_PLACES=336, PETRI_TRANSITIONS=680} [2024-06-14 13:06:10,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 13:06:10,352 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 680 transitions, 12776 flow [2024-06-14 13:06:10,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:10,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:10,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:10,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:06:10,353 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:10,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 26198579, now seen corresponding path program 13 times [2024-06-14 13:06:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:10,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827764547] [2024-06-14 13:06:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:10,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:13,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:13,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827764547] [2024-06-14 13:06:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827764547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:13,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:13,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296359262] [2024-06-14 13:06:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:13,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:13,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 680 transitions, 12776 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:13,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:13,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:13,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:16,606 INFO L124 PetriNetUnfolderBase]: 6245/9703 cut-off events. [2024-06-14 13:06:16,607 INFO L125 PetriNetUnfolderBase]: For 826320/826359 co-relation queries the response was YES. [2024-06-14 13:06:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93421 conditions, 9703 events. 6245/9703 cut-off events. For 826320/826359 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 60574 event pairs, 1418 based on Foata normal form. 52/9750 useless extension candidates. Maximal degree in co-relation 93262. Up to 8434 conditions per place. [2024-06-14 13:06:16,727 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 655 selfloop transitions, 94 changer transitions 0/752 dead transitions. [2024-06-14 13:06:16,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 752 transitions, 14997 flow [2024-06-14 13:06:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:06:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:06:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-14 13:06:16,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817829457364341 [2024-06-14 13:06:16,728 INFO L175 Difference]: Start difference. First operand has 336 places, 680 transitions, 12776 flow. Second operand 12 states and 197 transitions. [2024-06-14 13:06:16,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 752 transitions, 14997 flow [2024-06-14 13:06:18,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 752 transitions, 14844 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 13:06:18,815 INFO L231 Difference]: Finished difference. Result has 340 places, 686 transitions, 12999 flow [2024-06-14 13:06:18,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12623, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12999, PETRI_PLACES=340, PETRI_TRANSITIONS=686} [2024-06-14 13:06:18,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 13:06:18,816 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 686 transitions, 12999 flow [2024-06-14 13:06:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:18,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:18,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:06:18,817 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:18,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1629265929, now seen corresponding path program 14 times [2024-06-14 13:06:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:18,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854125863] [2024-06-14 13:06:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:21,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:21,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854125863] [2024-06-14 13:06:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854125863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:21,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041784322] [2024-06-14 13:06:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:21,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:21,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 686 transitions, 12999 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:21,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:21,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:21,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:25,078 INFO L124 PetriNetUnfolderBase]: 6333/9855 cut-off events. [2024-06-14 13:06:25,079 INFO L125 PetriNetUnfolderBase]: For 860562/860601 co-relation queries the response was YES. [2024-06-14 13:06:25,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95034 conditions, 9855 events. 6333/9855 cut-off events. For 860562/860601 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 61871 event pairs, 1493 based on Foata normal form. 56/9906 useless extension candidates. Maximal degree in co-relation 94873. Up to 9158 conditions per place. [2024-06-14 13:06:25,202 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 648 selfloop transitions, 86 changer transitions 0/737 dead transitions. [2024-06-14 13:06:25,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 737 transitions, 14741 flow [2024-06-14 13:06:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:06:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:06:25,203 INFO L175 Difference]: Start difference. First operand has 340 places, 686 transitions, 12999 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:06:25,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 737 transitions, 14741 flow [2024-06-14 13:06:27,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 737 transitions, 14597 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:06:27,611 INFO L231 Difference]: Finished difference. Result has 342 places, 687 transitions, 13080 flow [2024-06-14 13:06:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12859, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13080, PETRI_PLACES=342, PETRI_TRANSITIONS=687} [2024-06-14 13:06:27,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 13:06:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 687 transitions, 13080 flow [2024-06-14 13:06:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:27,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:27,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:06:27,612 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:27,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1493284161, now seen corresponding path program 6 times [2024-06-14 13:06:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523710046] [2024-06-14 13:06:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:30,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523710046] [2024-06-14 13:06:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523710046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:30,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:30,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:30,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434127016] [2024-06-14 13:06:30,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:30,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:30,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 687 transitions, 13080 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:30,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:30,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:30,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:34,333 INFO L124 PetriNetUnfolderBase]: 6325/9840 cut-off events. [2024-06-14 13:06:34,333 INFO L125 PetriNetUnfolderBase]: For 832949/832988 co-relation queries the response was YES. [2024-06-14 13:06:34,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94948 conditions, 9840 events. 6325/9840 cut-off events. For 832949/832988 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 61756 event pairs, 1515 based on Foata normal form. 40/9875 useless extension candidates. Maximal degree in co-relation 94785. Up to 9509 conditions per place. [2024-06-14 13:06:34,463 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 667 selfloop transitions, 54 changer transitions 0/724 dead transitions. [2024-06-14 13:06:34,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 724 transitions, 14735 flow [2024-06-14 13:06:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:06:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:06:34,465 INFO L175 Difference]: Start difference. First operand has 342 places, 687 transitions, 13080 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:06:34,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 724 transitions, 14735 flow [2024-06-14 13:06:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 724 transitions, 14550 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:06:36,978 INFO L231 Difference]: Finished difference. Result has 343 places, 689 transitions, 13103 flow [2024-06-14 13:06:36,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12895, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13103, PETRI_PLACES=343, PETRI_TRANSITIONS=689} [2024-06-14 13:06:36,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 13:06:36,979 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 689 transitions, 13103 flow [2024-06-14 13:06:36,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:36,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:36,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:36,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:06:36,979 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:36,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 109988719, now seen corresponding path program 7 times [2024-06-14 13:06:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:36,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072587913] [2024-06-14 13:06:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:39,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072587913] [2024-06-14 13:06:39,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072587913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:39,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093274398] [2024-06-14 13:06:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:39,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:40,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:40,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 689 transitions, 13103 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:40,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:40,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:43,623 INFO L124 PetriNetUnfolderBase]: 6345/9872 cut-off events. [2024-06-14 13:06:43,623 INFO L125 PetriNetUnfolderBase]: For 854174/854213 co-relation queries the response was YES. [2024-06-14 13:06:43,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95423 conditions, 9872 events. 6345/9872 cut-off events. For 854174/854213 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 62049 event pairs, 1515 based on Foata normal form. 40/9907 useless extension candidates. Maximal degree in co-relation 95259. Up to 9552 conditions per place. [2024-06-14 13:06:43,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 674 selfloop transitions, 49 changer transitions 0/726 dead transitions. [2024-06-14 13:06:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 726 transitions, 14758 flow [2024-06-14 13:06:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:06:43,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 13:06:43,752 INFO L175 Difference]: Start difference. First operand has 343 places, 689 transitions, 13103 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:06:43,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 726 transitions, 14758 flow [2024-06-14 13:06:46,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 726 transitions, 14570 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:46,155 INFO L231 Difference]: Finished difference. Result has 345 places, 691 transitions, 13113 flow [2024-06-14 13:06:46,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12915, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13113, PETRI_PLACES=345, PETRI_TRANSITIONS=691} [2024-06-14 13:06:46,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 13:06:46,156 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 691 transitions, 13113 flow [2024-06-14 13:06:46,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:46,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:46,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:06:46,156 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:46,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash 109773517, now seen corresponding path program 15 times [2024-06-14 13:06:46,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:46,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821144130] [2024-06-14 13:06:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:46,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:48,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821144130] [2024-06-14 13:06:48,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821144130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:48,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:48,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584200959] [2024-06-14 13:06:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:48,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:48,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:48,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 691 transitions, 13113 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:48,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:48,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:48,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:52,400 INFO L124 PetriNetUnfolderBase]: 6309/9816 cut-off events. [2024-06-14 13:06:52,400 INFO L125 PetriNetUnfolderBase]: For 860373/860412 co-relation queries the response was YES. [2024-06-14 13:06:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 9816 events. 6309/9816 cut-off events. For 860373/860412 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 61517 event pairs, 1503 based on Foata normal form. 56/9867 useless extension candidates. Maximal degree in co-relation 93510. Up to 9316 conditions per place. [2024-06-14 13:06:52,559 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 59 changer transitions 0/737 dead transitions. [2024-06-14 13:06:52,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 737 transitions, 14824 flow [2024-06-14 13:06:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:06:52,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 13:06:52,560 INFO L175 Difference]: Start difference. First operand has 345 places, 691 transitions, 13113 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:06:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 737 transitions, 14824 flow [2024-06-14 13:06:55,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 737 transitions, 14607 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:55,200 INFO L231 Difference]: Finished difference. Result has 348 places, 692 transitions, 13067 flow [2024-06-14 13:06:55,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13067, PETRI_PLACES=348, PETRI_TRANSITIONS=692} [2024-06-14 13:06:55,200 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 13:06:55,200 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 692 transitions, 13067 flow [2024-06-14 13:06:55,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:55,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:55,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:55,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:06:55,201 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:55,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1227377631, now seen corresponding path program 8 times [2024-06-14 13:06:55,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:55,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277025460] [2024-06-14 13:06:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:58,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277025460] [2024-06-14 13:06:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277025460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:58,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:58,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:58,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736977418] [2024-06-14 13:06:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:58,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:58,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:58,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:58,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:58,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 692 transitions, 13067 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:58,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:58,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:58,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:02,032 INFO L124 PetriNetUnfolderBase]: 6301/9804 cut-off events. [2024-06-14 13:07:02,032 INFO L125 PetriNetUnfolderBase]: For 820727/820766 co-relation queries the response was YES. [2024-06-14 13:07:02,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92845 conditions, 9804 events. 6301/9804 cut-off events. For 820727/820766 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 61380 event pairs, 1402 based on Foata normal form. 40/9839 useless extension candidates. Maximal degree in co-relation 92679. Up to 9390 conditions per place. [2024-06-14 13:07:02,158 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 672 selfloop transitions, 55 changer transitions 0/730 dead transitions. [2024-06-14 13:07:02,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 730 transitions, 14736 flow [2024-06-14 13:07:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:07:02,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 13:07:02,159 INFO L175 Difference]: Start difference. First operand has 348 places, 692 transitions, 13067 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:07:02,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 730 transitions, 14736 flow [2024-06-14 13:07:04,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 730 transitions, 14617 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:04,603 INFO L231 Difference]: Finished difference. Result has 349 places, 694 transitions, 13162 flow [2024-06-14 13:07:04,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12948, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13162, PETRI_PLACES=349, PETRI_TRANSITIONS=694} [2024-06-14 13:07:04,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:07:04,604 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 694 transitions, 13162 flow [2024-06-14 13:07:04,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:04,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:04,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:07:04,604 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:04,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 459721793, now seen corresponding path program 1 times [2024-06-14 13:07:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752531961] [2024-06-14 13:07:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:09,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:09,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752531961] [2024-06-14 13:07:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752531961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:07:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092134484] [2024-06-14 13:07:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:07:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:07:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:07:09,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:09,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 694 transitions, 13162 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:09,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:09,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:09,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:12,613 INFO L124 PetriNetUnfolderBase]: 6281/9765 cut-off events. [2024-06-14 13:07:12,613 INFO L125 PetriNetUnfolderBase]: For 826751/826785 co-relation queries the response was YES. [2024-06-14 13:07:12,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92084 conditions, 9765 events. 6281/9765 cut-off events. For 826751/826785 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 61102 event pairs, 1401 based on Foata normal form. 40/9803 useless extension candidates. Maximal degree in co-relation 91917. Up to 9404 conditions per place. [2024-06-14 13:07:12,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 707 selfloop transitions, 37 changer transitions 0/747 dead transitions. [2024-06-14 13:07:12,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 747 transitions, 14882 flow [2024-06-14 13:07:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:07:12,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 13:07:12,748 INFO L175 Difference]: Start difference. First operand has 349 places, 694 transitions, 13162 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:07:12,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 747 transitions, 14882 flow [2024-06-14 13:07:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 747 transitions, 14661 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:15,794 INFO L231 Difference]: Finished difference. Result has 352 places, 695 transitions, 13060 flow [2024-06-14 13:07:15,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12951, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13060, PETRI_PLACES=352, PETRI_TRANSITIONS=695} [2024-06-14 13:07:15,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 13:07:15,795 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 695 transitions, 13060 flow [2024-06-14 13:07:15,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:15,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:15,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:15,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:07:15,795 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:15,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2076343775, now seen corresponding path program 2 times [2024-06-14 13:07:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082247935] [2024-06-14 13:07:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082247935] [2024-06-14 13:07:19,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082247935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:19,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:19,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:07:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34517984] [2024-06-14 13:07:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:07:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:07:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:07:19,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 695 transitions, 13060 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:22,915 INFO L124 PetriNetUnfolderBase]: 6329/9859 cut-off events. [2024-06-14 13:07:22,915 INFO L125 PetriNetUnfolderBase]: For 849457/849481 co-relation queries the response was YES. [2024-06-14 13:07:23,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92446 conditions, 9859 events. 6329/9859 cut-off events. For 849457/849481 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62096 event pairs, 1498 based on Foata normal form. 34/9888 useless extension candidates. Maximal degree in co-relation 92278. Up to 9441 conditions per place. [2024-06-14 13:07:23,042 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 685 selfloop transitions, 54 changer transitions 0/742 dead transitions. [2024-06-14 13:07:23,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 742 transitions, 14765 flow [2024-06-14 13:07:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:07:23,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:07:23,044 INFO L175 Difference]: Start difference. First operand has 352 places, 695 transitions, 13060 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:07:23,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 742 transitions, 14765 flow [2024-06-14 13:07:26,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 742 transitions, 14650 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:26,295 INFO L231 Difference]: Finished difference. Result has 355 places, 696 transitions, 13115 flow [2024-06-14 13:07:26,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12945, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13115, PETRI_PLACES=355, PETRI_TRANSITIONS=696} [2024-06-14 13:07:26,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 13:07:26,296 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 696 transitions, 13115 flow [2024-06-14 13:07:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:26,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:26,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:26,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:07:26,297 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:26,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2082830525, now seen corresponding path program 3 times [2024-06-14 13:07:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:26,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23549699] [2024-06-14 13:07:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:26,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:29,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23549699] [2024-06-14 13:07:29,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23549699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:29,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:29,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532822662] [2024-06-14 13:07:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 696 transitions, 13115 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:29,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:29,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:29,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:32,657 INFO L124 PetriNetUnfolderBase]: 6377/9942 cut-off events. [2024-06-14 13:07:32,658 INFO L125 PetriNetUnfolderBase]: For 872367/872388 co-relation queries the response was YES. [2024-06-14 13:07:32,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93140 conditions, 9942 events. 6377/9942 cut-off events. For 872367/872388 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 62831 event pairs, 1501 based on Foata normal form. 32/9970 useless extension candidates. Maximal degree in co-relation 92971. Up to 9575 conditions per place. [2024-06-14 13:07:32,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 702 selfloop transitions, 44 changer transitions 0/749 dead transitions. [2024-06-14 13:07:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 749 transitions, 14856 flow [2024-06-14 13:07:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:07:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:07:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:07:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-14 13:07:32,814 INFO L175 Difference]: Start difference. First operand has 355 places, 696 transitions, 13115 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:07:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 749 transitions, 14856 flow [2024-06-14 13:07:35,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 749 transitions, 14704 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:35,917 INFO L231 Difference]: Finished difference. Result has 358 places, 697 transitions, 13115 flow [2024-06-14 13:07:35,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12963, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13115, PETRI_PLACES=358, PETRI_TRANSITIONS=697} [2024-06-14 13:07:35,918 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:07:35,918 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 697 transitions, 13115 flow [2024-06-14 13:07:35,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:35,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:35,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:35,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:07:35,919 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:35,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 772564815, now seen corresponding path program 4 times [2024-06-14 13:07:35,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:35,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75027640] [2024-06-14 13:07:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:39,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75027640] [2024-06-14 13:07:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75027640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:39,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:39,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:07:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603639877] [2024-06-14 13:07:39,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:39,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:07:39,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:07:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:07:39,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:39,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 697 transitions, 13115 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:39,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:39,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:39,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:43,079 INFO L124 PetriNetUnfolderBase]: 6425/10025 cut-off events. [2024-06-14 13:07:43,080 INFO L125 PetriNetUnfolderBase]: For 891491/891530 co-relation queries the response was YES. [2024-06-14 13:07:43,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93737 conditions, 10025 events. 6425/10025 cut-off events. For 891491/891530 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 63465 event pairs, 1518 based on Foata normal form. 48/10068 useless extension candidates. Maximal degree in co-relation 93567. Up to 9620 conditions per place. [2024-06-14 13:07:43,230 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 692 selfloop transitions, 47 changer transitions 0/742 dead transitions. [2024-06-14 13:07:43,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 742 transitions, 14818 flow [2024-06-14 13:07:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:07:43,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:07:43,231 INFO L175 Difference]: Start difference. First operand has 358 places, 697 transitions, 13115 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:07:43,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 742 transitions, 14818 flow [2024-06-14 13:07:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 742 transitions, 14684 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 13:07:45,687 INFO L231 Difference]: Finished difference. Result has 359 places, 698 transitions, 13141 flow [2024-06-14 13:07:45,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12981, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13141, PETRI_PLACES=359, PETRI_TRANSITIONS=698} [2024-06-14 13:07:45,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 13:07:45,688 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 698 transitions, 13141 flow [2024-06-14 13:07:45,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:45,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:45,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:07:45,688 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:45,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash 959089323, now seen corresponding path program 5 times [2024-06-14 13:07:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:45,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677279135] [2024-06-14 13:07:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677279135] [2024-06-14 13:07:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677279135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:50,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:50,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:07:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306036729] [2024-06-14 13:07:50,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:07:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:07:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:07:50,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:50,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 698 transitions, 13141 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:50,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:50,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:50,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:54,007 INFO L124 PetriNetUnfolderBase]: 6473/10108 cut-off events. [2024-06-14 13:07:54,007 INFO L125 PetriNetUnfolderBase]: For 911255/911294 co-relation queries the response was YES. [2024-06-14 13:07:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94380 conditions, 10108 events. 6473/10108 cut-off events. For 911255/911294 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64216 event pairs, 1529 based on Foata normal form. 48/10151 useless extension candidates. Maximal degree in co-relation 94209. Up to 9693 conditions per place. [2024-06-14 13:07:54,134 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 684 selfloop transitions, 55 changer transitions 0/742 dead transitions. [2024-06-14 13:07:54,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 742 transitions, 14844 flow [2024-06-14 13:07:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:07:54,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-14 13:07:54,135 INFO L175 Difference]: Start difference. First operand has 359 places, 698 transitions, 13141 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:07:54,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 742 transitions, 14844 flow [2024-06-14 13:07:56,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 742 transitions, 14702 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:56,552 INFO L231 Difference]: Finished difference. Result has 361 places, 699 transitions, 13177 flow [2024-06-14 13:07:56,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12999, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13177, PETRI_PLACES=361, PETRI_TRANSITIONS=699} [2024-06-14 13:07:56,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 13:07:56,553 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 699 transitions, 13177 flow [2024-06-14 13:07:56,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:56,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:56,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:07:56,553 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:56,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 959319963, now seen corresponding path program 6 times [2024-06-14 13:07:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:56,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281648987] [2024-06-14 13:07:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281648987] [2024-06-14 13:07:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281648987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:07:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203055276] [2024-06-14 13:07:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:07:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:07:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:07:59,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:59,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 699 transitions, 13177 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:07:59,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:59,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:59,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:03,202 INFO L124 PetriNetUnfolderBase]: 6521/10192 cut-off events. [2024-06-14 13:08:03,202 INFO L125 PetriNetUnfolderBase]: For 932022/932061 co-relation queries the response was YES. [2024-06-14 13:08:03,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95052 conditions, 10192 events. 6521/10192 cut-off events. For 932022/932061 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 64988 event pairs, 1541 based on Foata normal form. 48/10235 useless extension candidates. Maximal degree in co-relation 94880. Up to 9788 conditions per place. [2024-06-14 13:08:03,362 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 696 selfloop transitions, 54 changer transitions 0/753 dead transitions. [2024-06-14 13:08:03,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 753 transitions, 14935 flow [2024-06-14 13:08:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-14 13:08:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35852713178294576 [2024-06-14 13:08:03,364 INFO L175 Difference]: Start difference. First operand has 361 places, 699 transitions, 13177 flow. Second operand 12 states and 185 transitions. [2024-06-14 13:08:03,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 753 transitions, 14935 flow [2024-06-14 13:08:07,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 753 transitions, 14775 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:07,057 INFO L231 Difference]: Finished difference. Result has 365 places, 700 transitions, 13195 flow [2024-06-14 13:08:07,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13017, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13195, PETRI_PLACES=365, PETRI_TRANSITIONS=700} [2024-06-14 13:08:07,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 13:08:07,057 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 700 transitions, 13195 flow [2024-06-14 13:08:07,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:08:07,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:07,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:07,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:08:07,058 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:07,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 606001051, now seen corresponding path program 7 times [2024-06-14 13:08:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400172865] [2024-06-14 13:08:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:10,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400172865] [2024-06-14 13:08:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400172865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:08:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222299117] [2024-06-14 13:08:10,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:10,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:08:10,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:08:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:08:10,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:10,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 700 transitions, 13195 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:08:10,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:10,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:14,273 INFO L124 PetriNetUnfolderBase]: 6569/10276 cut-off events. [2024-06-14 13:08:14,273 INFO L125 PetriNetUnfolderBase]: For 952608/952647 co-relation queries the response was YES. [2024-06-14 13:08:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95692 conditions, 10276 events. 6569/10276 cut-off events. For 952608/952647 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 65612 event pairs, 1448 based on Foata normal form. 48/10319 useless extension candidates. Maximal degree in co-relation 95519. Up to 9778 conditions per place. [2024-06-14 13:08:14,434 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 686 selfloop transitions, 56 changer transitions 0/745 dead transitions. [2024-06-14 13:08:14,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 745 transitions, 14905 flow [2024-06-14 13:08:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:08:14,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-14 13:08:14,435 INFO L175 Difference]: Start difference. First operand has 365 places, 700 transitions, 13195 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:08:14,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 745 transitions, 14905 flow [2024-06-14 13:08:17,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 745 transitions, 14745 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:17,458 INFO L231 Difference]: Finished difference. Result has 365 places, 701 transitions, 13219 flow [2024-06-14 13:08:17,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13035, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13219, PETRI_PLACES=365, PETRI_TRANSITIONS=701} [2024-06-14 13:08:17,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 13:08:17,458 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 701 transitions, 13219 flow [2024-06-14 13:08:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:08:17,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:08:17,459 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash 572464187, now seen corresponding path program 8 times [2024-06-14 13:08:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112405908] [2024-06-14 13:08:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:20,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112405908] [2024-06-14 13:08:20,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112405908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:20,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:08:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106766809] [2024-06-14 13:08:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:08:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:08:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:08:20,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:20,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 701 transitions, 13219 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:08:20,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:20,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:20,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:24,528 INFO L124 PetriNetUnfolderBase]: 6617/10361 cut-off events. [2024-06-14 13:08:24,528 INFO L125 PetriNetUnfolderBase]: For 975037/975076 co-relation queries the response was YES. [2024-06-14 13:08:24,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96357 conditions, 10361 events. 6617/10361 cut-off events. For 975037/975076 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 66497 event pairs, 1593 based on Foata normal form. 48/10404 useless extension candidates. Maximal degree in co-relation 96183. Up to 9867 conditions per place. [2024-06-14 13:08:24,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 679 selfloop transitions, 66 changer transitions 0/748 dead transitions. [2024-06-14 13:08:24,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 748 transitions, 14958 flow [2024-06-14 13:08:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:08:24,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 13:08:24,687 INFO L175 Difference]: Start difference. First operand has 365 places, 701 transitions, 13219 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:08:24,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 748 transitions, 14958 flow [2024-06-14 13:08:28,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 748 transitions, 14792 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:28,271 INFO L231 Difference]: Finished difference. Result has 367 places, 702 transitions, 13259 flow [2024-06-14 13:08:28,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13053, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13259, PETRI_PLACES=367, PETRI_TRANSITIONS=702} [2024-06-14 13:08:28,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 13:08:28,272 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 702 transitions, 13259 flow [2024-06-14 13:08:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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) [2024-06-14 13:08:28,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:28,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:08:28,272 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:28,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash 744954077, now seen corresponding path program 9 times [2024-06-14 13:08:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492882125] [2024-06-14 13:08:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:31,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:31,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492882125] [2024-06-14 13:08:31,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492882125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:31,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:31,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792911398] [2024-06-14 13:08:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:31,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:31,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:31,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 702 transitions, 13259 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:31,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:31,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:34,892 INFO L124 PetriNetUnfolderBase]: 6597/10329 cut-off events. [2024-06-14 13:08:34,893 INFO L125 PetriNetUnfolderBase]: For 950898/950937 co-relation queries the response was YES. [2024-06-14 13:08:34,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95071 conditions, 10329 events. 6597/10329 cut-off events. For 950898/950937 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 66156 event pairs, 1594 based on Foata normal form. 48/10372 useless extension candidates. Maximal degree in co-relation 94896. Up to 9913 conditions per place. [2024-06-14 13:08:35,031 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 701 selfloop transitions, 56 changer transitions 0/760 dead transitions. [2024-06-14 13:08:35,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 760 transitions, 14837 flow [2024-06-14 13:08:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:08:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:08:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 200 transitions. [2024-06-14 13:08:35,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35778175313059035 [2024-06-14 13:08:35,032 INFO L175 Difference]: Start difference. First operand has 367 places, 702 transitions, 13259 flow. Second operand 13 states and 200 transitions. [2024-06-14 13:08:35,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 760 transitions, 14837 flow [2024-06-14 13:08:38,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 760 transitions, 14612 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 13:08:38,211 INFO L231 Difference]: Finished difference. Result has 370 places, 701 transitions, 12988 flow [2024-06-14 13:08:38,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12872, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12988, PETRI_PLACES=370, PETRI_TRANSITIONS=701} [2024-06-14 13:08:38,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 13:08:38,212 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 701 transitions, 12988 flow [2024-06-14 13:08:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:38,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:38,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:38,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:08:38,212 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)] === [2024-06-14 13:08:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1388372804, now seen corresponding path program 1 times [2024-06-14 13:08:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630883547] [2024-06-14 13:08:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630883547] [2024-06-14 13:08:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630883547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:40,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383893576] [2024-06-14 13:08:40,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:40,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:40,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:40,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 701 transitions, 12988 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:40,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:40,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:40,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:43,669 INFO L124 PetriNetUnfolderBase]: 6607/10347 cut-off events. [2024-06-14 13:08:43,669 INFO L125 PetriNetUnfolderBase]: For 919062/919062 co-relation queries the response was YES. [2024-06-14 13:08:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94753 conditions, 10347 events. 6607/10347 cut-off events. For 919062/919062 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 66411 event pairs, 1783 based on Foata normal form. 2/10347 useless extension candidates. Maximal degree in co-relation 94578. Up to 10205 conditions per place. [2024-06-14 13:08:43,841 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 702 selfloop transitions, 24 changer transitions 0/729 dead transitions. [2024-06-14 13:08:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 729 transitions, 14834 flow [2024-06-14 13:08:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:08:43,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 13:08:43,843 INFO L175 Difference]: Start difference. First operand has 370 places, 701 transitions, 12988 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:08:43,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 729 transitions, 14834 flow [2024-06-14 13:08:47,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 729 transitions, 14642 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-06-14 13:08:47,106 INFO L231 Difference]: Finished difference. Result has 365 places, 707 transitions, 13009 flow [2024-06-14 13:08:47,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13009, PETRI_PLACES=365, PETRI_TRANSITIONS=707} [2024-06-14 13:08:47,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 13:08:47,107 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 707 transitions, 13009 flow [2024-06-14 13:08:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:47,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:47,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:08:47,107 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)] === [2024-06-14 13:08:47,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1355975336, now seen corresponding path program 2 times [2024-06-14 13:08:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:47,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105287687] [2024-06-14 13:08:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:49,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105287687] [2024-06-14 13:08:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105287687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:49,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761560207] [2024-06-14 13:08:49,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:49,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:49,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:49,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:49,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 707 transitions, 13009 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:49,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:49,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:49,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:52,531 INFO L124 PetriNetUnfolderBase]: 6622/10368 cut-off events. [2024-06-14 13:08:52,531 INFO L125 PetriNetUnfolderBase]: For 935479/935479 co-relation queries the response was YES. [2024-06-14 13:08:52,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94868 conditions, 10368 events. 6622/10368 cut-off events. For 935479/935479 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 66566 event pairs, 1759 based on Foata normal form. 2/10368 useless extension candidates. Maximal degree in co-relation 94693. Up to 10258 conditions per place. [2024-06-14 13:08:52,692 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 706 selfloop transitions, 20 changer transitions 0/729 dead transitions. [2024-06-14 13:08:52,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 729 transitions, 14652 flow [2024-06-14 13:08:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 13:08:52,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34219269102990035 [2024-06-14 13:08:52,693 INFO L175 Difference]: Start difference. First operand has 365 places, 707 transitions, 13009 flow. Second operand 7 states and 103 transitions. [2024-06-14 13:08:52,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 729 transitions, 14652 flow [2024-06-14 13:08:55,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 729 transitions, 14533 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:55,979 INFO L231 Difference]: Finished difference. Result has 369 places, 713 transitions, 13079 flow [2024-06-14 13:08:55,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12909, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13079, PETRI_PLACES=369, PETRI_TRANSITIONS=713} [2024-06-14 13:08:55,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-14 13:08:55,980 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 713 transitions, 13079 flow [2024-06-14 13:08:55,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:55,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:55,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:55,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:08:55,981 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)] === [2024-06-14 13:08:55,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1355975150, now seen corresponding path program 1 times [2024-06-14 13:08:55,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:55,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909861717] [2024-06-14 13:08:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:55,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909861717] [2024-06-14 13:08:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909861717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:57,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:57,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058976713] [2024-06-14 13:08:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:57,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:57,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 713 transitions, 13079 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:01,523 INFO L124 PetriNetUnfolderBase]: 6672/10433 cut-off events. [2024-06-14 13:09:01,523 INFO L125 PetriNetUnfolderBase]: For 958517/958556 co-relation queries the response was YES. [2024-06-14 13:09:01,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95684 conditions, 10433 events. 6672/10433 cut-off events. For 958517/958556 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 66911 event pairs, 1581 based on Foata normal form. 40/10468 useless extension candidates. Maximal degree in co-relation 95507. Up to 10110 conditions per place. [2024-06-14 13:09:01,683 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 657 selfloop transitions, 93 changer transitions 0/753 dead transitions. [2024-06-14 13:09:01,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 753 transitions, 15245 flow [2024-06-14 13:09:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:09:01,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:09:01,684 INFO L175 Difference]: Start difference. First operand has 369 places, 713 transitions, 13079 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:09:01,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 753 transitions, 15245 flow [2024-06-14 13:09:05,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 753 transitions, 15155 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:05,091 INFO L231 Difference]: Finished difference. Result has 373 places, 735 transitions, 13651 flow [2024-06-14 13:09:05,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12989, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13651, PETRI_PLACES=373, PETRI_TRANSITIONS=735} [2024-06-14 13:09:05,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:09:05,092 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 735 transitions, 13651 flow [2024-06-14 13:09:05,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:05,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:05,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:09:05,093 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)] === [2024-06-14 13:09:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2096460146, now seen corresponding path program 2 times [2024-06-14 13:09:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698305640] [2024-06-14 13:09:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698305640] [2024-06-14 13:09:07,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698305640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:07,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:07,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868901490] [2024-06-14 13:09:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:07,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:07,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 735 transitions, 13651 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:07,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:07,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:10,375 INFO L124 PetriNetUnfolderBase]: 6684/10455 cut-off events. [2024-06-14 13:09:10,375 INFO L125 PetriNetUnfolderBase]: For 982348/982409 co-relation queries the response was YES. [2024-06-14 13:09:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96174 conditions, 10455 events. 6684/10455 cut-off events. For 982348/982409 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 67050 event pairs, 1641 based on Foata normal form. 52/10496 useless extension candidates. Maximal degree in co-relation 95995. Up to 10118 conditions per place. [2024-06-14 13:09:10,552 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 647 selfloop transitions, 104 changer transitions 0/754 dead transitions. [2024-06-14 13:09:10,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 754 transitions, 15506 flow [2024-06-14 13:09:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:09:10,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 13:09:10,553 INFO L175 Difference]: Start difference. First operand has 373 places, 735 transitions, 13651 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:09:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 754 transitions, 15506 flow [2024-06-14 13:09:14,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 754 transitions, 15367 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:14,684 INFO L231 Difference]: Finished difference. Result has 376 places, 742 transitions, 13874 flow [2024-06-14 13:09:14,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13517, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13874, PETRI_PLACES=376, PETRI_TRANSITIONS=742} [2024-06-14 13:09:14,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 13:09:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 742 transitions, 13874 flow [2024-06-14 13:09:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:14,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:14,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:09:14,685 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)] === [2024-06-14 13:09:14,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 151680298, now seen corresponding path program 3 times [2024-06-14 13:09:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664655789] [2024-06-14 13:09:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:16,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:16,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664655789] [2024-06-14 13:09:16,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664655789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:16,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:16,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607064971] [2024-06-14 13:09:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:16,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:16,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 742 transitions, 13874 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:16,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:16,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:16,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:20,453 INFO L124 PetriNetUnfolderBase]: 6678/10447 cut-off events. [2024-06-14 13:09:20,454 INFO L125 PetriNetUnfolderBase]: For 980506/980506 co-relation queries the response was YES. [2024-06-14 13:09:20,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96199 conditions, 10447 events. 6678/10447 cut-off events. For 980506/980506 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 66987 event pairs, 1772 based on Foata normal form. 2/10447 useless extension candidates. Maximal degree in co-relation 96019. Up to 10309 conditions per place. [2024-06-14 13:09:20,613 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 731 selfloop transitions, 27 changer transitions 0/761 dead transitions. [2024-06-14 13:09:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 761 transitions, 15458 flow [2024-06-14 13:09:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 13:09:20,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:09:20,614 INFO L175 Difference]: Start difference. First operand has 376 places, 742 transitions, 13874 flow. Second operand 6 states and 98 transitions. [2024-06-14 13:09:20,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 761 transitions, 15458 flow [2024-06-14 13:09:23,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 761 transitions, 15106 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:23,988 INFO L231 Difference]: Finished difference. Result has 377 places, 742 transitions, 13592 flow [2024-06-14 13:09:23,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13522, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13592, PETRI_PLACES=377, PETRI_TRANSITIONS=742} [2024-06-14 13:09:23,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-14 13:09:23,988 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 742 transitions, 13592 flow [2024-06-14 13:09:23,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:23,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:23,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:23,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:09:23,989 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)] === [2024-06-14 13:09:23,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2096697296, now seen corresponding path program 3 times [2024-06-14 13:09:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207970122] [2024-06-14 13:09:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:26,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:26,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207970122] [2024-06-14 13:09:26,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207970122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:26,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:26,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509671552] [2024-06-14 13:09:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:26,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:26,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 742 transitions, 13592 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:26,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:26,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:26,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:29,433 INFO L124 PetriNetUnfolderBase]: 6641/10385 cut-off events. [2024-06-14 13:09:29,433 INFO L125 PetriNetUnfolderBase]: For 983749/983788 co-relation queries the response was YES. [2024-06-14 13:09:29,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95197 conditions, 10385 events. 6641/10385 cut-off events. For 983749/983788 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 66596 event pairs, 1586 based on Foata normal form. 40/10420 useless extension candidates. Maximal degree in co-relation 95017. Up to 10062 conditions per place. [2024-06-14 13:09:29,597 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 652 selfloop transitions, 102 changer transitions 0/757 dead transitions. [2024-06-14 13:09:29,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 757 transitions, 15158 flow [2024-06-14 13:09:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:09:29,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:09:29,600 INFO L175 Difference]: Start difference. First operand has 377 places, 742 transitions, 13592 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:09:29,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 757 transitions, 15158 flow [2024-06-14 13:09:33,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 757 transitions, 15084 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:33,566 INFO L231 Difference]: Finished difference. Result has 378 places, 742 transitions, 13749 flow [2024-06-14 13:09:33,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13518, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13749, PETRI_PLACES=378, PETRI_TRANSITIONS=742} [2024-06-14 13:09:33,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 13:09:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 742 transitions, 13749 flow [2024-06-14 13:09:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:33,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:09:33,568 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)] === [2024-06-14 13:09:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2096451218, now seen corresponding path program 1 times [2024-06-14 13:09:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435039174] [2024-06-14 13:09:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435039174] [2024-06-14 13:09:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435039174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607679950] [2024-06-14 13:09:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:35,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 742 transitions, 13749 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:39,401 INFO L124 PetriNetUnfolderBase]: 6644/10388 cut-off events. [2024-06-14 13:09:39,401 INFO L125 PetriNetUnfolderBase]: For 980186/980225 co-relation queries the response was YES. [2024-06-14 13:09:39,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95304 conditions, 10388 events. 6644/10388 cut-off events. For 980186/980225 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 66468 event pairs, 1592 based on Foata normal form. 40/10423 useless extension candidates. Maximal degree in co-relation 95123. Up to 10232 conditions per place. [2024-06-14 13:09:39,550 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 721 selfloop transitions, 32 changer transitions 0/756 dead transitions. [2024-06-14 13:09:39,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 756 transitions, 15338 flow [2024-06-14 13:09:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 13:09:39,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:09:39,551 INFO L175 Difference]: Start difference. First operand has 378 places, 742 transitions, 13749 flow. Second operand 6 states and 93 transitions. [2024-06-14 13:09:39,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 756 transitions, 15338 flow [2024-06-14 13:09:42,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 756 transitions, 15121 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:42,775 INFO L231 Difference]: Finished difference. Result has 379 places, 745 transitions, 13659 flow [2024-06-14 13:09:42,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13532, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13659, PETRI_PLACES=379, PETRI_TRANSITIONS=745} [2024-06-14 13:09:42,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 13:09:42,776 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 745 transitions, 13659 flow [2024-06-14 13:09:42,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:42,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:42,776 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] [2024-06-14 13:09:42,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:09:42,776 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)] === [2024-06-14 13:09:42,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -121909111, now seen corresponding path program 1 times [2024-06-14 13:09:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033696418] [2024-06-14 13:09:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:44,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:44,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033696418] [2024-06-14 13:09:44,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033696418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:44,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88212799] [2024-06-14 13:09:44,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:44,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:44,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:44,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 745 transitions, 13659 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:44,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:44,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:47,537 INFO L124 PetriNetUnfolderBase]: 6669/10422 cut-off events. [2024-06-14 13:09:47,537 INFO L125 PetriNetUnfolderBase]: For 962793/962848 co-relation queries the response was YES. [2024-06-14 13:09:47,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95816 conditions, 10422 events. 6669/10422 cut-off events. For 962793/962848 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 66696 event pairs, 1557 based on Foata normal form. 48/10465 useless extension candidates. Maximal degree in co-relation 95634. Up to 10167 conditions per place. [2024-06-14 13:09:47,699 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 724 selfloop transitions, 59 changer transitions 0/786 dead transitions. [2024-06-14 13:09:47,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 786 transitions, 15949 flow [2024-06-14 13:09:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:09:47,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:09:47,700 INFO L175 Difference]: Start difference. First operand has 379 places, 745 transitions, 13659 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:09:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 786 transitions, 15949 flow [2024-06-14 13:09:50,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 786 transitions, 15847 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:50,989 INFO L231 Difference]: Finished difference. Result has 384 places, 761 transitions, 14191 flow [2024-06-14 13:09:50,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13557, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14191, PETRI_PLACES=384, PETRI_TRANSITIONS=761} [2024-06-14 13:09:50,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 13:09:50,990 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 761 transitions, 14191 flow [2024-06-14 13:09:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:50,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:50,990 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] [2024-06-14 13:09:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:09:50,990 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)] === [2024-06-14 13:09:50,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 689032289, now seen corresponding path program 2 times [2024-06-14 13:09:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:50,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045200892] [2024-06-14 13:09:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045200892] [2024-06-14 13:09:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045200892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:52,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081563577] [2024-06-14 13:09:52,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:52,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:52,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 761 transitions, 14191 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:52,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:52,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:52,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:55,762 INFO L124 PetriNetUnfolderBase]: 6671/10426 cut-off events. [2024-06-14 13:09:55,762 INFO L125 PetriNetUnfolderBase]: For 985218/985253 co-relation queries the response was YES. [2024-06-14 13:09:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96533 conditions, 10426 events. 6671/10426 cut-off events. For 985218/985253 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 66756 event pairs, 1593 based on Foata normal form. 34/10455 useless extension candidates. Maximal degree in co-relation 96348. Up to 10287 conditions per place. [2024-06-14 13:09:55,945 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 743 selfloop transitions, 29 changer transitions 0/775 dead transitions. [2024-06-14 13:09:55,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 775 transitions, 15868 flow [2024-06-14 13:09:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-14 13:09:55,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-06-14 13:09:55,946 INFO L175 Difference]: Start difference. First operand has 384 places, 761 transitions, 14191 flow. Second operand 6 states and 91 transitions. [2024-06-14 13:09:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 775 transitions, 15868 flow [2024-06-14 13:09:59,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 775 transitions, 15734 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:59,414 INFO L231 Difference]: Finished difference. Result has 388 places, 764 transitions, 14222 flow [2024-06-14 13:09:59,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14069, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14222, PETRI_PLACES=388, PETRI_TRANSITIONS=764} [2024-06-14 13:09:59,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-14 13:09:59,414 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 764 transitions, 14222 flow [2024-06-14 13:09:59,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:59,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:59,415 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] [2024-06-14 13:09:59,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:09:59,415 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)] === [2024-06-14 13:09:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash 689021129, now seen corresponding path program 3 times [2024-06-14 13:09:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:59,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527047294] [2024-06-14 13:09:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:01,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527047294] [2024-06-14 13:10:01,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527047294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:01,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:01,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:10:01,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481109827] [2024-06-14 13:10:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:10:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:10:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:10:01,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 764 transitions, 14222 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:04,402 INFO L124 PetriNetUnfolderBase]: 6665/10417 cut-off events. [2024-06-14 13:10:04,403 INFO L125 PetriNetUnfolderBase]: For 992517/992563 co-relation queries the response was YES. [2024-06-14 13:10:04,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96410 conditions, 10417 events. 6665/10417 cut-off events. For 992517/992563 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 66663 event pairs, 1575 based on Foata normal form. 42/10454 useless extension candidates. Maximal degree in co-relation 96223. Up to 10166 conditions per place. [2024-06-14 13:10:04,558 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 719 selfloop transitions, 64 changer transitions 0/786 dead transitions. [2024-06-14 13:10:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 786 transitions, 15881 flow [2024-06-14 13:10:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:10:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:10:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 13:10:04,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 13:10:04,559 INFO L175 Difference]: Start difference. First operand has 388 places, 764 transitions, 14222 flow. Second operand 6 states and 101 transitions. [2024-06-14 13:10:04,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 786 transitions, 15881 flow [2024-06-14 13:10:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 786 transitions, 15712 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:07,807 INFO L231 Difference]: Finished difference. Result has 390 places, 764 transitions, 14198 flow [2024-06-14 13:10:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14053, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14198, PETRI_PLACES=390, PETRI_TRANSITIONS=764} [2024-06-14 13:10:07,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:10:07,807 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 764 transitions, 14198 flow [2024-06-14 13:10:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:07,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:10:07,808 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)] === [2024-06-14 13:10:07,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash 910720493, now seen corresponding path program 1 times [2024-06-14 13:10:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051278872] [2024-06-14 13:10:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:10,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051278872] [2024-06-14 13:10:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051278872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:10,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:10,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179843352] [2024-06-14 13:10:10,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:10,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:10,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 764 transitions, 14198 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:10,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:10,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:10,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:14,015 INFO L124 PetriNetUnfolderBase]: 6761/10554 cut-off events. [2024-06-14 13:10:14,016 INFO L125 PetriNetUnfolderBase]: For 1061801/1061836 co-relation queries the response was YES. [2024-06-14 13:10:14,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98422 conditions, 10554 events. 6761/10554 cut-off events. For 1061801/1061836 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67529 event pairs, 1596 based on Foata normal form. 40/10589 useless extension candidates. Maximal degree in co-relation 98235. Up to 9871 conditions per place. [2024-06-14 13:10:14,192 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 682 selfloop transitions, 120 changer transitions 0/805 dead transitions. [2024-06-14 13:10:14,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 805 transitions, 16611 flow [2024-06-14 13:10:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:10:14,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:10:14,194 INFO L175 Difference]: Start difference. First operand has 390 places, 764 transitions, 14198 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:10:14,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 805 transitions, 16611 flow [2024-06-14 13:10:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 805 transitions, 16455 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:17,638 INFO L231 Difference]: Finished difference. Result has 394 places, 775 transitions, 14600 flow [2024-06-14 13:10:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14046, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14600, PETRI_PLACES=394, PETRI_TRANSITIONS=775} [2024-06-14 13:10:17,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 13:10:17,639 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 775 transitions, 14600 flow [2024-06-14 13:10:17,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:17,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:17,639 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] [2024-06-14 13:10:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:10:17,639 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)] === [2024-06-14 13:10:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 914439563, now seen corresponding path program 2 times [2024-06-14 13:10:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:17,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116034134] [2024-06-14 13:10:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:17,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:20,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116034134] [2024-06-14 13:10:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116034134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:20,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412597951] [2024-06-14 13:10:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:20,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:20,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:20,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 775 transitions, 14600 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:23,983 INFO L124 PetriNetUnfolderBase]: 6889/10732 cut-off events. [2024-06-14 13:10:23,983 INFO L125 PetriNetUnfolderBase]: For 1113842/1113877 co-relation queries the response was YES. [2024-06-14 13:10:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101881 conditions, 10732 events. 6889/10732 cut-off events. For 1113842/1113877 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 68696 event pairs, 1606 based on Foata normal form. 40/10767 useless extension candidates. Maximal degree in co-relation 101693. Up to 10272 conditions per place. [2024-06-14 13:10:24,171 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 704 selfloop transitions, 100 changer transitions 0/807 dead transitions. [2024-06-14 13:10:24,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 807 transitions, 16734 flow [2024-06-14 13:10:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:10:24,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:10:24,172 INFO L175 Difference]: Start difference. First operand has 394 places, 775 transitions, 14600 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:10:24,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 807 transitions, 16734 flow [2024-06-14 13:10:27,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 807 transitions, 16483 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-14 13:10:27,789 INFO L231 Difference]: Finished difference. Result has 400 places, 783 transitions, 14805 flow [2024-06-14 13:10:27,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14373, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14805, PETRI_PLACES=400, PETRI_TRANSITIONS=783} [2024-06-14 13:10:27,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 13:10:27,790 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 783 transitions, 14805 flow [2024-06-14 13:10:27,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:27,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:27,790 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] [2024-06-14 13:10:27,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:10:27,790 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)] === [2024-06-14 13:10:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1181092677, now seen corresponding path program 3 times [2024-06-14 13:10:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215448223] [2024-06-14 13:10:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:27,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215448223] [2024-06-14 13:10:30,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215448223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:30,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:30,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146644155] [2024-06-14 13:10:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:30,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:30,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 783 transitions, 14805 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:30,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:30,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:30,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:34,377 INFO L124 PetriNetUnfolderBase]: 6897/10744 cut-off events. [2024-06-14 13:10:34,378 INFO L125 PetriNetUnfolderBase]: For 1121608/1121643 co-relation queries the response was YES. [2024-06-14 13:10:34,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101727 conditions, 10744 events. 6897/10744 cut-off events. For 1121608/1121643 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 68752 event pairs, 1608 based on Foata normal form. 40/10779 useless extension candidates. Maximal degree in co-relation 101536. Up to 10284 conditions per place. [2024-06-14 13:10:34,549 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 699 selfloop transitions, 112 changer transitions 0/814 dead transitions. [2024-06-14 13:10:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 814 transitions, 16831 flow [2024-06-14 13:10:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:10:34,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581395348837209 [2024-06-14 13:10:34,551 INFO L175 Difference]: Start difference. First operand has 400 places, 783 transitions, 14805 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:10:34,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 814 transitions, 16831 flow [2024-06-14 13:10:38,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 814 transitions, 16612 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:38,636 INFO L231 Difference]: Finished difference. Result has 406 places, 787 transitions, 14920 flow [2024-06-14 13:10:38,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14604, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14920, PETRI_PLACES=406, PETRI_TRANSITIONS=787} [2024-06-14 13:10:38,636 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:10:38,636 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 787 transitions, 14920 flow [2024-06-14 13:10:38,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:38,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:38,636 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] [2024-06-14 13:10:38,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:10:38,637 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)] === [2024-06-14 13:10:38,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:38,637 INFO L85 PathProgramCache]: Analyzing trace with hash -565753253, now seen corresponding path program 4 times [2024-06-14 13:10:38,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:38,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082978214] [2024-06-14 13:10:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:40,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082978214] [2024-06-14 13:10:40,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082978214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:40,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:40,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261297379] [2024-06-14 13:10:40,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:40,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:40,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 787 transitions, 14920 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:40,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:40,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:40,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:45,171 INFO L124 PetriNetUnfolderBase]: 6969/10849 cut-off events. [2024-06-14 13:10:45,171 INFO L125 PetriNetUnfolderBase]: For 1163373/1163430 co-relation queries the response was YES. [2024-06-14 13:10:45,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103152 conditions, 10849 events. 6969/10849 cut-off events. For 1163373/1163430 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 69579 event pairs, 1641 based on Foata normal form. 56/10894 useless extension candidates. Maximal degree in co-relation 102959. Up to 10105 conditions per place. [2024-06-14 13:10:45,643 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 669 selfloop transitions, 150 changer transitions 0/822 dead transitions. [2024-06-14 13:10:45,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 822 transitions, 17276 flow [2024-06-14 13:10:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:10:45,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 13:10:45,644 INFO L175 Difference]: Start difference. First operand has 406 places, 787 transitions, 14920 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:10:45,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 822 transitions, 17276 flow [2024-06-14 13:10:49,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 822 transitions, 17000 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:49,236 INFO L231 Difference]: Finished difference. Result has 408 places, 796 transitions, 15253 flow [2024-06-14 13:10:49,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14644, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15253, PETRI_PLACES=408, PETRI_TRANSITIONS=796} [2024-06-14 13:10:49,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-14 13:10:49,236 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 796 transitions, 15253 flow [2024-06-14 13:10:49,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:49,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:49,237 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] [2024-06-14 13:10:49,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:10:49,237 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)] === [2024-06-14 13:10:49,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -573104903, now seen corresponding path program 5 times [2024-06-14 13:10:49,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:49,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868088036] [2024-06-14 13:10:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:49,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868088036] [2024-06-14 13:10:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868088036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:51,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:51,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945272939] [2024-06-14 13:10:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:51,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:51,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:51,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:51,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:10:51,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 796 transitions, 15253 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:51,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:51,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:10:51,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:56,146 INFO L124 PetriNetUnfolderBase]: 7009/10900 cut-off events. [2024-06-14 13:10:56,146 INFO L125 PetriNetUnfolderBase]: For 1182015/1182050 co-relation queries the response was YES. [2024-06-14 13:10:56,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104208 conditions, 10900 events. 7009/10900 cut-off events. For 1182015/1182050 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 69766 event pairs, 1611 based on Foata normal form. 40/10935 useless extension candidates. Maximal degree in co-relation 104013. Up to 10129 conditions per place. [2024-06-14 13:10:56,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 676 selfloop transitions, 151 changer transitions 0/830 dead transitions. [2024-06-14 13:10:56,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 830 transitions, 17513 flow [2024-06-14 13:10:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:10:56,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:10:56,329 INFO L175 Difference]: Start difference. First operand has 408 places, 796 transitions, 15253 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:10:56,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 830 transitions, 17513 flow [2024-06-14 13:11:00,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 830 transitions, 17090 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:00,949 INFO L231 Difference]: Finished difference. Result has 410 places, 800 transitions, 15254 flow [2024-06-14 13:11:00,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14859, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15254, PETRI_PLACES=410, PETRI_TRANSITIONS=800} [2024-06-14 13:11:00,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-14 13:11:00,950 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 800 transitions, 15254 flow [2024-06-14 13:11:00,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:00,950 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] [2024-06-14 13:11:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:11:00,950 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)] === [2024-06-14 13:11:00,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash -573110483, now seen corresponding path program 6 times [2024-06-14 13:11:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105807369] [2024-06-14 13:11:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:03,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:03,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105807369] [2024-06-14 13:11:03,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105807369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:03,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:03,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040327812] [2024-06-14 13:11:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:03,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:03,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:11:03,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 800 transitions, 15254 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:03,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:03,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:11:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:07,734 INFO L124 PetriNetUnfolderBase]: 6993/10880 cut-off events. [2024-06-14 13:11:07,735 INFO L125 PetriNetUnfolderBase]: For 1164119/1164154 co-relation queries the response was YES. [2024-06-14 13:11:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103222 conditions, 10880 events. 6993/10880 cut-off events. For 1164119/1164154 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 69647 event pairs, 1611 based on Foata normal form. 40/10915 useless extension candidates. Maximal degree in co-relation 103027. Up to 10125 conditions per place. [2024-06-14 13:11:07,909 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 687 selfloop transitions, 134 changer transitions 0/824 dead transitions. [2024-06-14 13:11:07,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 824 transitions, 17178 flow [2024-06-14 13:11:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:11:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:11:07,911 INFO L175 Difference]: Start difference. First operand has 410 places, 800 transitions, 15254 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:11:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 824 transitions, 17178 flow [2024-06-14 13:11:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 824 transitions, 16784 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:11,771 INFO L231 Difference]: Finished difference. Result has 410 places, 800 transitions, 15142 flow [2024-06-14 13:11:11,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14860, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15142, PETRI_PLACES=410, PETRI_TRANSITIONS=800} [2024-06-14 13:11:11,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-14 13:11:11,772 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 800 transitions, 15142 flow [2024-06-14 13:11:11,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:11,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:11,773 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] [2024-06-14 13:11:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:11:11,773 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)] === [2024-06-14 13:11:11,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1182819103, now seen corresponding path program 1 times [2024-06-14 13:11:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369411002] [2024-06-14 13:11:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:13,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369411002] [2024-06-14 13:11:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369411002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:13,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436301844] [2024-06-14 13:11:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:13,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:11:13,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 800 transitions, 15142 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 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) [2024-06-14 13:11:13,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:13,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:11:13,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:18,059 INFO L124 PetriNetUnfolderBase]: 7026/10924 cut-off events. [2024-06-14 13:11:18,059 INFO L125 PetriNetUnfolderBase]: For 1162023/1162075 co-relation queries the response was YES. [2024-06-14 13:11:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103618 conditions, 10924 events. 7026/10924 cut-off events. For 1162023/1162075 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 69923 event pairs, 1600 based on Foata normal form. 48/10967 useless extension candidates. Maximal degree in co-relation 103422. Up to 10514 conditions per place. [2024-06-14 13:11:18,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 753 selfloop transitions, 96 changer transitions 0/852 dead transitions. [2024-06-14 13:11:18,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 852 transitions, 17474 flow [2024-06-14 13:11:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:11:18,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581395348837209 [2024-06-14 13:11:18,311 INFO L175 Difference]: Start difference. First operand has 410 places, 800 transitions, 15142 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:11:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 852 transitions, 17474 flow [2024-06-14 13:11:22,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 852 transitions, 17206 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:22,692 INFO L231 Difference]: Finished difference. Result has 415 places, 813 transitions, 15391 flow [2024-06-14 13:11:22,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14874, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15391, PETRI_PLACES=415, PETRI_TRANSITIONS=813} [2024-06-14 13:11:22,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 13:11:22,696 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 813 transitions, 15391 flow [2024-06-14 13:11:22,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 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) [2024-06-14 13:11:22,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:22,696 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] [2024-06-14 13:11:22,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:11:22,696 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)] === [2024-06-14 13:11:22,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1300909635, now seen corresponding path program 1 times [2024-06-14 13:11:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286215235] [2024-06-14 13:11:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286215235] [2024-06-14 13:11:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286215235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:25,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90367880] [2024-06-14 13:11:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:25,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:11:25,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 813 transitions, 15391 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:11:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:30,069 INFO L124 PetriNetUnfolderBase]: 7100/11031 cut-off events. [2024-06-14 13:11:30,069 INFO L125 PetriNetUnfolderBase]: For 1229286/1229305 co-relation queries the response was YES. [2024-06-14 13:11:30,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106118 conditions, 11031 events. 7100/11031 cut-off events. For 1229286/1229305 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 70636 event pairs, 1699 based on Foata normal form. 20/11046 useless extension candidates. Maximal degree in co-relation 105920. Up to 10122 conditions per place. [2024-06-14 13:11:30,251 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 699 selfloop transitions, 158 changer transitions 0/860 dead transitions. [2024-06-14 13:11:30,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 860 transitions, 17909 flow [2024-06-14 13:11:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:11:30,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:11:30,252 INFO L175 Difference]: Start difference. First operand has 415 places, 813 transitions, 15391 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:11:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 860 transitions, 17909 flow [2024-06-14 13:11:33,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 860 transitions, 17788 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:33,791 INFO L231 Difference]: Finished difference. Result has 420 places, 823 transitions, 15864 flow [2024-06-14 13:11:33,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15270, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15864, PETRI_PLACES=420, PETRI_TRANSITIONS=823} [2024-06-14 13:11:33,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 13:11:33,792 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 823 transitions, 15864 flow [2024-06-14 13:11:33,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:33,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:33,792 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] [2024-06-14 13:11:33,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:11:33,792 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)] === [2024-06-14 13:11:33,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash -104096707, now seen corresponding path program 2 times [2024-06-14 13:11:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:33,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164144983] [2024-06-14 13:11:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:33,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:36,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164144983] [2024-06-14 13:11:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164144983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280943374] [2024-06-14 13:11:36,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:36,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:36,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:11:36,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 823 transitions, 15864 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:36,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:36,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:11:36,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand