./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_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/safe018_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/safe018_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe018_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 13:20:03,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:20:03,307 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:20:03,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:20:03,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:20:03,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:20:03,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:20:03,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:20:03,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:20:03,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:20:03,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:20:03,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:20:03,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:20:03,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:20:03,346 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:20:03,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:20:03,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:20:03,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:20:03,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:20:03,348 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:20:03,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:20:03,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:20:03,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:20:03,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:20:03,349 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:20:03,349 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:20:03,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:20:03,349 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:20:03,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:20:03,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:20:03,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:20:03,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:20:03,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:20:03,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:20:03,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:20:03,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:20:03,352 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:20:03,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:20:03,353 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:20:03,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:20:03,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:20:03,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:20:03,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:20:03,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:20:03,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:20:03,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:20:03,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:20:03,584 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:20:03,584 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:20:03,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-14 13:20:04,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:20:04,923 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:20:04,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-14 13:20:04,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a614cbc8/70b77fcba769470c92121f4c4ffd3919/FLAGdf83ed940 [2024-06-14 13:20:04,945 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a614cbc8/70b77fcba769470c92121f4c4ffd3919 [2024-06-14 13:20:04,947 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:20:04,948 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:20:04,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe018_power.opt.yml/witness.yml [2024-06-14 13:20:05,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:20:05,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:20:05,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:20:05,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:20:05,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:20:05,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:20:04" (1/2) ... [2024-06-14 13:20:05,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cb8a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:20:05, skipping insertion in model container [2024-06-14 13:20:05,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:20:04" (1/2) ... [2024-06-14 13:20:05,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ea10993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:20:05, skipping insertion in model container [2024-06-14 13:20:05,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:20:05" (2/2) ... [2024-06-14 13:20:05,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cb8a40 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:20:05, skipping insertion in model container [2024-06-14 13:20:05,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:20:05" (2/2) ... [2024-06-14 13:20:05,133 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:20:05,283 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:20:05,285 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:20:05,285 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:20:05,285 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:20:05,285 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:20:05,285 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-14 13:20:05,334 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:20:05,585 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:20:05,594 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:20:05,748 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:20:05,776 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:20:05,777 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:20:05 WrapperNode [2024-06-14 13:20:05,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:20:05,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:20:05,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:20:05,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:20:05,787 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,805 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,854 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 251 [2024-06-14 13:20:05,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:20:05,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:20:05,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:20:05,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:20:05,868 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,868 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,874 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,907 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-14 13:20:05,918 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,918 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,928 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,942 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,945 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,947 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:20:05,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:20:05,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:20:05,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:20:05,954 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 01:20:05" (1/1) ... [2024-06-14 13:20:05,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:20:05,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:20:05,981 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 13:20:05,990 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 13:20:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:20:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:20:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:20:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:20:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:20:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:20:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:20:06,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:20:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:20:06,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:20:06,029 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:20:06,029 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:20:06,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:20:06,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:20:06,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:20:06,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:20:06,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:20:06,033 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 13:20:06,183 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:20:06,185 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:20:06,720 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:20:06,720 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:20:07,129 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:20:07,129 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:20:07,130 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:20:07 BoogieIcfgContainer [2024-06-14 13:20:07,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:20:07,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:20:07,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:20:07,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:20:07,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:20:04" (1/4) ... [2024-06-14 13:20:07,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b0a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:20:07, skipping insertion in model container [2024-06-14 13:20:07,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:20:05" (2/4) ... [2024-06-14 13:20:07,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b0a2a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:20:07, skipping insertion in model container [2024-06-14 13:20:07,137 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 01:20:05" (3/4) ... [2024-06-14 13:20:07,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b0a2a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:20:07, skipping insertion in model container [2024-06-14 13:20:07,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:20:07" (4/4) ... [2024-06-14 13:20:07,138 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.opt.i [2024-06-14 13:20:07,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:20:07,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:20:07,153 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:20:07,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:20:07,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:20:07,277 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:20:07,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:20:07,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:20:07,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:20:07,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:20:07,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:20:07,302 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;@49f3e6a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:20:07,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:20:07,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:20:07,307 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:20:07,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:20:07,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:07,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:20:07,309 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 13:20:07,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1629027848, now seen corresponding path program 1 times [2024-06-14 13:20:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:07,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858263538] [2024-06-14 13:20:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:07,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:09,104 INFO 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 13:20:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858263538] [2024-06-14 13:20:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858263538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:09,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:20:09,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227198071] [2024-06-14 13:20:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:09,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:20:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:20:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:20:09,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:09,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 13:20:09,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:09,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:09,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:09,616 INFO L124 PetriNetUnfolderBase]: 897/1381 cut-off events. [2024-06-14 13:20:09,617 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-14 13:20:09,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1381 events. 897/1381 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6418 event pairs, 455 based on Foata normal form. 2/1359 useless extension candidates. Maximal degree in co-relation 2795. Up to 1343 conditions per place. [2024-06-14 13:20:09,637 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:20:09,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-14 13:20:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:20:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:20:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-14 13:20:09,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-14 13:20:09,664 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-14 13:20:09,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-14 13:20:09,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:09,668 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:20:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:20:09,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:20:09,684 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:20:09,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 13:20:09,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:09,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:09,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:20:09,685 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 13:20:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1398661537, now seen corresponding path program 1 times [2024-06-14 13:20:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:09,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378620316] [2024-06-14 13:20:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378620316] [2024-06-14 13:20:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378620316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:11,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:20:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952874338] [2024-06-14 13:20:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:20:11,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:20:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:20:11,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:11,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 13:20:11,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:11,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:11,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:12,429 INFO L124 PetriNetUnfolderBase]: 1139/1737 cut-off events. [2024-06-14 13:20:12,430 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2024-06-14 13:20:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4022 conditions, 1737 events. 1139/1737 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7800 event pairs, 393 based on Foata normal form. 6/1739 useless extension candidates. Maximal degree in co-relation 4007. Up to 1639 conditions per place. [2024-06-14 13:20:12,437 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 44 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-06-14 13:20:12,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 246 flow [2024-06-14 13:20:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:20:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:20:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-14 13:20:12,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-14 13:20:12,440 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 81 transitions. [2024-06-14 13:20:12,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 246 flow [2024-06-14 13:20:12,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:20:12,441 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 125 flow [2024-06-14 13:20:12,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-14 13:20:12,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-06-14 13:20:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 125 flow [2024-06-14 13:20:12,443 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 13:20:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:20:12,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:12,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1486611466, now seen corresponding path program 1 times [2024-06-14 13:20:12,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:12,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260770692] [2024-06-14 13:20:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260770692] [2024-06-14 13:20:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260770692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:20:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975647560] [2024-06-14 13:20:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:20:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:20:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:20:13,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:13,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:13,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:13,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:13,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:14,241 INFO L124 PetriNetUnfolderBase]: 896/1391 cut-off events. [2024-06-14 13:20:14,242 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2024-06-14 13:20:14,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 1391 events. 896/1391 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6439 event pairs, 389 based on Foata normal form. 4/1393 useless extension candidates. Maximal degree in co-relation 3495. Up to 1337 conditions per place. [2024-06-14 13:20:14,248 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 45 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-14 13:20:14,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 293 flow [2024-06-14 13:20:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:20:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:20:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:20:14,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:20:14,250 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 125 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:20:14,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 293 flow [2024-06-14 13:20:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 276 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:14,253 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 174 flow [2024-06-14 13:20:14,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-06-14 13:20:14,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 13:20:14,253 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 174 flow [2024-06-14 13:20:14,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:14,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:14,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:14,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:20:14,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:14,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1159686591, now seen corresponding path program 1 times [2024-06-14 13:20:14,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565293989] [2024-06-14 13:20:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:14,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:16,099 INFO 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 13:20:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:16,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565293989] [2024-06-14 13:20:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565293989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:16,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:20:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243801895] [2024-06-14 13:20:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:16,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:20:16,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:20:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:20:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:16,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 13:20:16,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:16,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:16,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:16,679 INFO L124 PetriNetUnfolderBase]: 904/1403 cut-off events. [2024-06-14 13:20:16,679 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2024-06-14 13:20:16,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4059 conditions, 1403 events. 904/1403 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6465 event pairs, 371 based on Foata normal form. 4/1405 useless extension candidates. Maximal degree in co-relation 4039. Up to 1327 conditions per place. [2024-06-14 13:20:16,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-14 13:20:16,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 368 flow [2024-06-14 13:20:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:20:16,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-14 13:20:16,690 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 174 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:20:16,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 368 flow [2024-06-14 13:20:16,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 354 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:16,695 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 221 flow [2024-06-14 13:20:16,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 13:20:16,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-14 13:20:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 221 flow [2024-06-14 13:20:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 13:20:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:16,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:20:16,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:16,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1978426585, now seen corresponding path program 1 times [2024-06-14 13:20:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494950283] [2024-06-14 13:20:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:18,956 INFO 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 13:20:18,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:18,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494950283] [2024-06-14 13:20:18,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494950283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:18,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:18,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:18,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461592272] [2024-06-14 13:20:18,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:18,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:18,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:18,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:18,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:18,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:18,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:18,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:18,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:19,629 INFO L124 PetriNetUnfolderBase]: 984/1539 cut-off events. [2024-06-14 13:20:19,629 INFO L125 PetriNetUnfolderBase]: For 2682/2682 co-relation queries the response was YES. [2024-06-14 13:20:19,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4967 conditions, 1539 events. 984/1539 cut-off events. For 2682/2682 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7226 event pairs, 364 based on Foata normal form. 24/1561 useless extension candidates. Maximal degree in co-relation 4945. Up to 1295 conditions per place. [2024-06-14 13:20:19,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-14 13:20:19,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 469 flow [2024-06-14 13:20:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:20:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:20:19,639 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 221 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:20:19,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 469 flow [2024-06-14 13:20:19,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 438 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:19,658 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 247 flow [2024-06-14 13:20:19,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-14 13:20:19,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 13:20:19,661 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 247 flow [2024-06-14 13:20:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:19,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:19,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:19,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:20:19,662 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 13:20:19,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1884844548, now seen corresponding path program 1 times [2024-06-14 13:20:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692404390] [2024-06-14 13:20:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:19,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:21,706 INFO 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 13:20:21,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:21,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692404390] [2024-06-14 13:20:21,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692404390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:21,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:21,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256869128] [2024-06-14 13:20:21,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:21,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:21,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 247 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 13:20:21,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:21,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:21,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:22,385 INFO L124 PetriNetUnfolderBase]: 1212/1870 cut-off events. [2024-06-14 13:20:22,386 INFO L125 PetriNetUnfolderBase]: For 3940/3940 co-relation queries the response was YES. [2024-06-14 13:20:22,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 1870 events. 1212/1870 cut-off events. For 3940/3940 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8638 event pairs, 414 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 6172. Up to 1754 conditions per place. [2024-06-14 13:20:22,395 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 52 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-14 13:20:22,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 447 flow [2024-06-14 13:20:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:20:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:20:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 13:20:22,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-14 13:20:22,398 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 247 flow. Second operand 5 states and 89 transitions. [2024-06-14 13:20:22,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 447 flow [2024-06-14 13:20:22,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 420 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:22,404 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 288 flow [2024-06-14 13:20:22,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-14 13:20:22,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 13:20:22,406 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 288 flow [2024-06-14 13:20:22,406 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 13:20:22,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:22,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:20:22,407 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 13:20:22,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:22,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1104627643, now seen corresponding path program 1 times [2024-06-14 13:20:22,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:22,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601008073] [2024-06-14 13:20:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:24,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601008073] [2024-06-14 13:20:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601008073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167345214] [2024-06-14 13:20:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:24,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:24,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:24,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 288 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 13:20:24,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:24,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:25,332 INFO L124 PetriNetUnfolderBase]: 1225/1895 cut-off events. [2024-06-14 13:20:25,333 INFO L125 PetriNetUnfolderBase]: For 5315/5315 co-relation queries the response was YES. [2024-06-14 13:20:25,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6658 conditions, 1895 events. 1225/1895 cut-off events. For 5315/5315 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8821 event pairs, 396 based on Foata normal form. 2/1893 useless extension candidates. Maximal degree in co-relation 6634. Up to 1745 conditions per place. [2024-06-14 13:20:25,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-14 13:20:25,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 558 flow [2024-06-14 13:20:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:20:25,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:20:25,347 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 288 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:20:25,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 558 flow [2024-06-14 13:20:25,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 532 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:25,350 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 398 flow [2024-06-14 13:20:25,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-14 13:20:25,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 13:20:25,351 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 398 flow [2024-06-14 13:20:25,351 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 13:20:25,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:25,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:25,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:20:25,352 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 13:20:25,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1830545631, now seen corresponding path program 2 times [2024-06-14 13:20:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:25,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923875313] [2024-06-14 13:20:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:27,457 INFO 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 13:20:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923875313] [2024-06-14 13:20:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923875313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:27,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:27,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843193098] [2024-06-14 13:20:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:27,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:27,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 398 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 13:20:27,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:27,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:27,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:28,385 INFO L124 PetriNetUnfolderBase]: 1220/1888 cut-off events. [2024-06-14 13:20:28,386 INFO L125 PetriNetUnfolderBase]: For 7224/7224 co-relation queries the response was YES. [2024-06-14 13:20:28,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7212 conditions, 1888 events. 1220/1888 cut-off events. For 7224/7224 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8822 event pairs, 396 based on Foata normal form. 2/1886 useless extension candidates. Maximal degree in co-relation 7186. Up to 1705 conditions per place. [2024-06-14 13:20:28,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2024-06-14 13:20:28,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 668 flow [2024-06-14 13:20:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:20:28,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 13:20:28,404 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 398 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:20:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 668 flow [2024-06-14 13:20:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 608 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:28,409 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 440 flow [2024-06-14 13:20:28,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-14 13:20:28,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 13:20:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 440 flow [2024-06-14 13:20:28,411 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 13:20:28,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:28,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:28,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:20:28,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:28,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1643207164, now seen corresponding path program 1 times [2024-06-14 13:20:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989779432] [2024-06-14 13:20:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:30,062 INFO 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 13:20:30,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989779432] [2024-06-14 13:20:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989779432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:30,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:30,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:20:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82451666] [2024-06-14 13:20:30,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:20:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:20:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:20:30,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:30,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 440 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 13:20:30,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:30,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:30,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:30,760 INFO L124 PetriNetUnfolderBase]: 981/1535 cut-off events. [2024-06-14 13:20:30,761 INFO L125 PetriNetUnfolderBase]: For 7724/7724 co-relation queries the response was YES. [2024-06-14 13:20:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6430 conditions, 1535 events. 981/1535 cut-off events. For 7724/7724 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7244 event pairs, 350 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 6403. Up to 1477 conditions per place. [2024-06-14 13:20:30,773 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 62 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-14 13:20:30,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 640 flow [2024-06-14 13:20:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:20:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:20:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 13:20:30,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-14 13:20:30,775 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 440 flow. Second operand 5 states and 86 transitions. [2024-06-14 13:20:30,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 640 flow [2024-06-14 13:20:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 562 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:30,780 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 417 flow [2024-06-14 13:20:30,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-14 13:20:30,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 13:20:30,781 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 417 flow [2024-06-14 13:20:30,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 13:20:30,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:30,782 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 13:20:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:20:30,782 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 13:20:30,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1323410785, now seen corresponding path program 1 times [2024-06-14 13:20:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:30,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186501563] [2024-06-14 13:20:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:32,720 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 13:20:32,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186501563] [2024-06-14 13:20:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186501563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:32,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476469908] [2024-06-14 13:20:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:32,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:32,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 417 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 13:20:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:32,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:33,636 INFO L124 PetriNetUnfolderBase]: 1231/1908 cut-off events. [2024-06-14 13:20:33,637 INFO L125 PetriNetUnfolderBase]: For 10260/10260 co-relation queries the response was YES. [2024-06-14 13:20:33,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 1908 events. 1231/1908 cut-off events. For 10260/10260 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8928 event pairs, 252 based on Foata normal form. 4/1908 useless extension candidates. Maximal degree in co-relation 7873. Up to 1770 conditions per place. [2024-06-14 13:20:33,648 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 75 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-14 13:20:33,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 665 flow [2024-06-14 13:20:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:20:33,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:20:33,650 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 417 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:20:33,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 665 flow [2024-06-14 13:20:33,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 636 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:33,658 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 445 flow [2024-06-14 13:20:33,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=445, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-14 13:20:33,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 13:20:33,659 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 445 flow [2024-06-14 13:20:33,659 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 13:20:33,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:33,659 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 13:20:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:20:33,660 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 13:20:33,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash -271600533, now seen corresponding path program 2 times [2024-06-14 13:20:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:33,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045094166] [2024-06-14 13:20:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:33,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045094166] [2024-06-14 13:20:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045094166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:35,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501069649] [2024-06-14 13:20:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:35,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:35,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 445 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 13:20:35,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:35,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:35,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:36,462 INFO L124 PetriNetUnfolderBase]: 1223/1896 cut-off events. [2024-06-14 13:20:36,462 INFO L125 PetriNetUnfolderBase]: For 11663/11663 co-relation queries the response was YES. [2024-06-14 13:20:36,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 1896 events. 1223/1896 cut-off events. For 11663/11663 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8836 event pairs, 355 based on Foata normal form. 4/1896 useless extension candidates. Maximal degree in co-relation 8074. Up to 1730 conditions per place. [2024-06-14 13:20:36,472 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 71 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-14 13:20:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 713 flow [2024-06-14 13:20:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:20:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:20:36,474 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 445 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:20:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 713 flow [2024-06-14 13:20:36,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 674 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:36,484 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 495 flow [2024-06-14 13:20:36,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=495, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-14 13:20:36,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 13:20:36,484 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 495 flow [2024-06-14 13:20:36,485 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 13:20:36,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:36,485 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 13:20:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:20:36,485 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 13:20:36,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -271595573, now seen corresponding path program 1 times [2024-06-14 13:20:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456016624] [2024-06-14 13:20:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:38,738 INFO 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 13:20:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:38,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456016624] [2024-06-14 13:20:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456016624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:38,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197030550] [2024-06-14 13:20:38,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:38,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:38,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 495 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 13:20:38,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:38,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:38,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,690 INFO L124 PetriNetUnfolderBase]: 1291/2024 cut-off events. [2024-06-14 13:20:39,691 INFO L125 PetriNetUnfolderBase]: For 15022/15022 co-relation queries the response was YES. [2024-06-14 13:20:39,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8937 conditions, 2024 events. 1291/2024 cut-off events. For 15022/15022 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9664 event pairs, 318 based on Foata normal form. 16/2036 useless extension candidates. Maximal degree in co-relation 8907. Up to 1694 conditions per place. [2024-06-14 13:20:39,724 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 79 selfloop transitions, 22 changer transitions 0/105 dead transitions. [2024-06-14 13:20:39,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 825 flow [2024-06-14 13:20:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:20:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 13:20:39,726 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 495 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:20:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 825 flow [2024-06-14 13:20:39,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 766 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:39,745 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 528 flow [2024-06-14 13:20:39,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-14 13:20:39,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 13:20:39,747 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 528 flow [2024-06-14 13:20:39,747 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 13:20:39,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:39,747 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 13:20:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:20:39,748 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 13:20:39,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash -51672923, now seen corresponding path program 2 times [2024-06-14 13:20:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:39,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108366850] [2024-06-14 13:20:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:42,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:42,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108366850] [2024-06-14 13:20:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108366850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:42,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:42,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641634207] [2024-06-14 13:20:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:42,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:42,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 528 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 13:20:42,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:42,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:42,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:43,289 INFO L124 PetriNetUnfolderBase]: 1455/2308 cut-off events. [2024-06-14 13:20:43,290 INFO L125 PetriNetUnfolderBase]: For 18925/18925 co-relation queries the response was YES. [2024-06-14 13:20:43,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10392 conditions, 2308 events. 1455/2308 cut-off events. For 18925/18925 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11655 event pairs, 364 based on Foata normal form. 12/2316 useless extension candidates. Maximal degree in co-relation 10361. Up to 1601 conditions per place. [2024-06-14 13:20:43,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-14 13:20:43,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 994 flow [2024-06-14 13:20:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:20:43,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:20:43,333 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 528 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:20:43,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 994 flow [2024-06-14 13:20:43,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 948 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:43,362 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 630 flow [2024-06-14 13:20:43,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=630, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-14 13:20:43,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 13:20:43,364 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 630 flow [2024-06-14 13:20:43,364 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 13:20:43,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:43,364 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 13:20:43,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:20:43,365 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 13:20:43,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash -51679433, now seen corresponding path program 3 times [2024-06-14 13:20:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948554133] [2024-06-14 13:20:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:45,874 INFO 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 13:20:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948554133] [2024-06-14 13:20:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948554133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:45,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493261865] [2024-06-14 13:20:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:45,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 630 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 13:20:45,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:45,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:45,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:46,870 INFO L124 PetriNetUnfolderBase]: 1427/2269 cut-off events. [2024-06-14 13:20:46,871 INFO L125 PetriNetUnfolderBase]: For 20493/20498 co-relation queries the response was YES. [2024-06-14 13:20:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10285 conditions, 2269 events. 1427/2269 cut-off events. For 20493/20498 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11444 event pairs, 396 based on Foata normal form. 20/2287 useless extension candidates. Maximal degree in co-relation 10252. Up to 1976 conditions per place. [2024-06-14 13:20:46,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 23 changer transitions 0/118 dead transitions. [2024-06-14 13:20:46,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 978 flow [2024-06-14 13:20:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:20:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 13:20:46,885 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 630 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:20:46,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 978 flow [2024-06-14 13:20:46,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 928 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:46,902 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 642 flow [2024-06-14 13:20:46,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-14 13:20:46,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 13:20:46,903 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 642 flow [2024-06-14 13:20:46,903 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 13:20:46,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:46,903 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 13:20:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:20:46,904 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:46,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -610907752, now seen corresponding path program 1 times [2024-06-14 13:20:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:46,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615977725] [2024-06-14 13:20:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:48,781 INFO 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 13:20:48,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:48,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615977725] [2024-06-14 13:20:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615977725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:48,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:48,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:20:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618899210] [2024-06-14 13:20:48,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:48,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:20:48,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:20:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:20:48,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:48,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 642 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 13:20:48,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:48,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:48,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:49,735 INFO L124 PetriNetUnfolderBase]: 1421/2259 cut-off events. [2024-06-14 13:20:49,736 INFO L125 PetriNetUnfolderBase]: For 20296/20296 co-relation queries the response was YES. [2024-06-14 13:20:49,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10391 conditions, 2259 events. 1421/2259 cut-off events. For 20296/20296 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11367 event pairs, 391 based on Foata normal form. 2/2260 useless extension candidates. Maximal degree in co-relation 10356. Up to 2201 conditions per place. [2024-06-14 13:20:49,749 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 83 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-14 13:20:49,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 98 transitions, 906 flow [2024-06-14 13:20:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-14 13:20:49,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 13:20:49,750 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 642 flow. Second operand 6 states and 92 transitions. [2024-06-14 13:20:49,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 98 transitions, 906 flow [2024-06-14 13:20:49,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 858 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:49,766 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 692 flow [2024-06-14 13:20:49,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=692, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-14 13:20:49,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 13:20:49,767 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 692 flow [2024-06-14 13:20:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 13:20:49,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:49,768 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 13:20:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:20:49,768 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 13:20:49,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1035789998, now seen corresponding path program 1 times [2024-06-14 13:20:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880193492] [2024-06-14 13:20:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:51,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:51,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880193492] [2024-06-14 13:20:51,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880193492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:51,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:51,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907624595] [2024-06-14 13:20:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:51,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:51,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:51,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:51,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 692 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 13:20:51,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:51,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:51,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:52,948 INFO L124 PetriNetUnfolderBase]: 1469/2340 cut-off events. [2024-06-14 13:20:52,948 INFO L125 PetriNetUnfolderBase]: For 23541/23541 co-relation queries the response was YES. [2024-06-14 13:20:52,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11039 conditions, 2340 events. 1469/2340 cut-off events. For 23541/23541 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11832 event pairs, 288 based on Foata normal form. 12/2348 useless extension candidates. Maximal degree in co-relation 11001. Up to 2106 conditions per place. [2024-06-14 13:20:52,962 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-14 13:20:52,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 1016 flow [2024-06-14 13:20:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:20:52,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:20:52,965 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 692 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:20:52,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 1016 flow [2024-06-14 13:20:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 1008 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 13:20:52,983 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 746 flow [2024-06-14 13:20:52,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-14 13:20:52,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-14 13:20:52,984 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 746 flow [2024-06-14 13:20:52,984 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 13:20:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:52,984 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 13:20:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:20:52,984 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 13:20:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 83628040, now seen corresponding path program 2 times [2024-06-14 13:20:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762660570] [2024-06-14 13:20:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:55,112 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 13:20:55,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762660570] [2024-06-14 13:20:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762660570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:55,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:55,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834238104] [2024-06-14 13:20:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:55,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:55,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:20:55,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 746 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 13:20:55,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:55,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:20:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:56,069 INFO L124 PetriNetUnfolderBase]: 1449/2308 cut-off events. [2024-06-14 13:20:56,069 INFO L125 PetriNetUnfolderBase]: For 24544/24544 co-relation queries the response was YES. [2024-06-14 13:20:56,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10936 conditions, 2308 events. 1449/2308 cut-off events. For 24544/24544 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11703 event pairs, 389 based on Foata normal form. 12/2316 useless extension candidates. Maximal degree in co-relation 10895. Up to 2079 conditions per place. [2024-06-14 13:20:56,082 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 18 changer transitions 0/115 dead transitions. [2024-06-14 13:20:56,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 115 transitions, 1014 flow [2024-06-14 13:20:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:20:56,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:20:56,084 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 746 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:20:56,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 115 transitions, 1014 flow [2024-06-14 13:20:56,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 970 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:56,135 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 712 flow [2024-06-14 13:20:56,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-06-14 13:20:56,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 13:20:56,135 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 712 flow [2024-06-14 13:20:56,135 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 13:20:56,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:56,136 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 13:20:56,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:20:56,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:56,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1419729525, now seen corresponding path program 1 times [2024-06-14 13:20:56,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:56,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39304681] [2024-06-14 13:20:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:56,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:58,408 INFO 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 13:20:58,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39304681] [2024-06-14 13:20:58,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39304681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:58,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:20:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520410111] [2024-06-14 13:20:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:58,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:20:58,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:20:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:20:58,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:20:58,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 712 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:58,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:58,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:20:58,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:59,003 INFO L124 PetriNetUnfolderBase]: 1371/2230 cut-off events. [2024-06-14 13:20:59,003 INFO L125 PetriNetUnfolderBase]: For 25404/25404 co-relation queries the response was YES. [2024-06-14 13:20:59,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10765 conditions, 2230 events. 1371/2230 cut-off events. For 25404/25404 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11438 event pairs, 387 based on Foata normal form. 3/2230 useless extension candidates. Maximal degree in co-relation 10723. Up to 2124 conditions per place. [2024-06-14 13:20:59,016 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-14 13:20:59,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 105 transitions, 982 flow [2024-06-14 13:20:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 13:20:59,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 13:20:59,017 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 712 flow. Second operand 6 states and 101 transitions. [2024-06-14 13:20:59,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 105 transitions, 982 flow [2024-06-14 13:20:59,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 908 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:59,035 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 726 flow [2024-06-14 13:20:59,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=726, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2024-06-14 13:20:59,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 13:20:59,036 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 726 flow [2024-06-14 13:20:59,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:59,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:59,036 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 13:20:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:20:59,036 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:59,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1425808005, now seen corresponding path program 2 times [2024-06-14 13:20:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:59,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761565096] [2024-06-14 13:20:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:59,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:00,802 INFO 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 13:21:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:00,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761565096] [2024-06-14 13:21:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761565096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:00,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:21:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038420305] [2024-06-14 13:21:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:21:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:21:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:21:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 726 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:00,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:00,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:01,629 INFO L124 PetriNetUnfolderBase]: 1371/2223 cut-off events. [2024-06-14 13:21:01,629 INFO L125 PetriNetUnfolderBase]: For 27245/27245 co-relation queries the response was YES. [2024-06-14 13:21:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10946 conditions, 2223 events. 1371/2223 cut-off events. For 27245/27245 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11462 event pairs, 396 based on Foata normal form. 3/2221 useless extension candidates. Maximal degree in co-relation 10904. Up to 2125 conditions per place. [2024-06-14 13:21:01,641 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 17 changer transitions 0/106 dead transitions. [2024-06-14 13:21:01,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 1008 flow [2024-06-14 13:21:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 13:21:01,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:21:01,660 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 726 flow. Second operand 6 states and 98 transitions. [2024-06-14 13:21:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 1008 flow [2024-06-14 13:21:01,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 106 transitions, 950 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:01,679 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 751 flow [2024-06-14 13:21:01,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2024-06-14 13:21:01,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 13:21:01,680 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 751 flow [2024-06-14 13:21:01,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:01,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:01,681 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 13:21:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:21:01,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:01,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1261599121, now seen corresponding path program 1 times [2024-06-14 13:21:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:01,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878895995] [2024-06-14 13:21:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:03,905 INFO 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 13:21:03,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878895995] [2024-06-14 13:21:03,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878895995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:03,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:03,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:03,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403814309] [2024-06-14 13:21:03,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:03,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:03,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:03,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:03,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:03,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:03,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:03,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:04,973 INFO L124 PetriNetUnfolderBase]: 1483/2360 cut-off events. [2024-06-14 13:21:04,973 INFO L125 PetriNetUnfolderBase]: For 30565/30565 co-relation queries the response was YES. [2024-06-14 13:21:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11752 conditions, 2360 events. 1483/2360 cut-off events. For 30565/30565 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11992 event pairs, 403 based on Foata normal form. 4/2360 useless extension candidates. Maximal degree in co-relation 11709. Up to 2237 conditions per place. [2024-06-14 13:21:04,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-14 13:21:04,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 110 transitions, 1049 flow [2024-06-14 13:21:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:21:04,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-14 13:21:04,988 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 751 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:21:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 110 transitions, 1049 flow [2024-06-14 13:21:05,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 110 transitions, 998 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:05,010 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 790 flow [2024-06-14 13:21:05,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-06-14 13:21:05,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 13:21:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 790 flow [2024-06-14 13:21:05,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:05,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:05,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:21:05,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:05,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1250171281, now seen corresponding path program 2 times [2024-06-14 13:21:05,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:05,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832314825] [2024-06-14 13:21:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:05,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:07,445 INFO 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 13:21:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832314825] [2024-06-14 13:21:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832314825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:07,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964418332] [2024-06-14 13:21:07,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:07,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:07,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:07,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:07,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:07,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:08,626 INFO L124 PetriNetUnfolderBase]: 1471/2344 cut-off events. [2024-06-14 13:21:08,626 INFO L125 PetriNetUnfolderBase]: For 32461/32461 co-relation queries the response was YES. [2024-06-14 13:21:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11959 conditions, 2344 events. 1471/2344 cut-off events. For 32461/32461 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11894 event pairs, 401 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 11915. Up to 2205 conditions per place. [2024-06-14 13:21:08,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-14 13:21:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 116 transitions, 1122 flow [2024-06-14 13:21:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:21:08,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 13:21:08,641 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 790 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:21:08,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 116 transitions, 1122 flow [2024-06-14 13:21:08,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 1060 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:08,694 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 826 flow [2024-06-14 13:21:08,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=826, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-14 13:21:08,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 13:21:08,695 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 826 flow [2024-06-14 13:21:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:08,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:08,695 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 13:21:08,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:21:08,695 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:08,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1180334844, now seen corresponding path program 1 times [2024-06-14 13:21:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:08,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045412135] [2024-06-14 13:21:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045412135] [2024-06-14 13:21:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045412135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:10,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:10,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:10,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977562546] [2024-06-14 13:21:10,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:10,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:10,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:10,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:10,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:10,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:10,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 826 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:10,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:10,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:10,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:11,842 INFO L124 PetriNetUnfolderBase]: 1397/2270 cut-off events. [2024-06-14 13:21:11,843 INFO L125 PetriNetUnfolderBase]: For 33375/33377 co-relation queries the response was YES. [2024-06-14 13:21:11,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11897 conditions, 2270 events. 1397/2270 cut-off events. For 33375/33377 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11734 event pairs, 385 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 11852. Up to 2135 conditions per place. [2024-06-14 13:21:11,856 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 99 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-14 13:21:11,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 132 transitions, 1276 flow [2024-06-14 13:21:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:21:11,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:21:11,858 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 826 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:21:11,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 132 transitions, 1276 flow [2024-06-14 13:21:11,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 132 transitions, 1204 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:11,878 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 955 flow [2024-06-14 13:21:11,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=955, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-14 13:21:11,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 13:21:11,879 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 955 flow [2024-06-14 13:21:11,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:11,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:11,879 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 13:21:11,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:21:11,879 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:11,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1365518938, now seen corresponding path program 2 times [2024-06-14 13:21:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:11,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108542623] [2024-06-14 13:21:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:14,945 INFO 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 13:21:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108542623] [2024-06-14 13:21:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108542623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:14,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23738858] [2024-06-14 13:21:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:14,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:14,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:14,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:14,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:14,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:14,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:14,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:15,652 INFO L124 PetriNetUnfolderBase]: 1398/2271 cut-off events. [2024-06-14 13:21:15,652 INFO L125 PetriNetUnfolderBase]: For 36163/36165 co-relation queries the response was YES. [2024-06-14 13:21:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12310 conditions, 2271 events. 1398/2271 cut-off events. For 36163/36165 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11704 event pairs, 383 based on Foata normal form. 3/2267 useless extension candidates. Maximal degree in co-relation 12262. Up to 2154 conditions per place. [2024-06-14 13:21:15,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-14 13:21:15,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 131 transitions, 1297 flow [2024-06-14 13:21:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:21:15,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-14 13:21:15,668 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 955 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:21:15,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 131 transitions, 1297 flow [2024-06-14 13:21:15,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 131 transitions, 1245 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-14 13:21:15,696 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 1016 flow [2024-06-14 13:21:15,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1016, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-14 13:21:15,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 13:21:15,697 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 1016 flow [2024-06-14 13:21:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:15,697 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 13:21:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:21:15,697 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:15,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1180425209, now seen corresponding path program 1 times [2024-06-14 13:21:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712951002] [2024-06-14 13:21:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:18,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:18,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712951002] [2024-06-14 13:21:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712951002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:18,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:18,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:18,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613274041] [2024-06-14 13:21:18,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:18,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:18,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 1016 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:18,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:18,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:18,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:19,229 INFO L124 PetriNetUnfolderBase]: 1516/2410 cut-off events. [2024-06-14 13:21:19,229 INFO L125 PetriNetUnfolderBase]: For 40818/40818 co-relation queries the response was YES. [2024-06-14 13:21:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 2410 events. 1516/2410 cut-off events. For 40818/40818 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12288 event pairs, 384 based on Foata normal form. 4/2413 useless extension candidates. Maximal degree in co-relation 13255. Up to 2324 conditions per place. [2024-06-14 13:21:19,243 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 125 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2024-06-14 13:21:19,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 144 transitions, 1449 flow [2024-06-14 13:21:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 13:21:19,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 13:21:19,245 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 1016 flow. Second operand 7 states and 108 transitions. [2024-06-14 13:21:19,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 144 transitions, 1449 flow [2024-06-14 13:21:19,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 144 transitions, 1329 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:19,278 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1051 flow [2024-06-14 13:21:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1051, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-14 13:21:19,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-14 13:21:19,279 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1051 flow [2024-06-14 13:21:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:19,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:19,279 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 13:21:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:21:19,279 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:19,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1701705723, now seen corresponding path program 2 times [2024-06-14 13:21:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581835970] [2024-06-14 13:21:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:21,624 INFO 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 13:21:21,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:21,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581835970] [2024-06-14 13:21:21,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581835970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:21,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:21,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:21,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539772774] [2024-06-14 13:21:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:21,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:21,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:21,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:21,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:21,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:21,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:21,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:22,400 INFO L124 PetriNetUnfolderBase]: 1534/2435 cut-off events. [2024-06-14 13:21:22,401 INFO L125 PetriNetUnfolderBase]: For 43412/43412 co-relation queries the response was YES. [2024-06-14 13:21:22,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13803 conditions, 2435 events. 1534/2435 cut-off events. For 43412/43412 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12395 event pairs, 382 based on Foata normal form. 2/2436 useless extension candidates. Maximal degree in co-relation 13749. Up to 2358 conditions per place. [2024-06-14 13:21:22,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 129 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2024-06-14 13:21:22,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 151 transitions, 1513 flow [2024-06-14 13:21:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 13:21:22,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-14 13:21:22,417 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1051 flow. Second operand 7 states and 106 transitions. [2024-06-14 13:21:22,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 151 transitions, 1513 flow [2024-06-14 13:21:22,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1487 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:21:22,450 INFO L231 Difference]: Finished difference. Result has 118 places, 136 transitions, 1184 flow [2024-06-14 13:21:22,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1184, PETRI_PLACES=118, PETRI_TRANSITIONS=136} [2024-06-14 13:21:22,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 13:21:22,451 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 136 transitions, 1184 flow [2024-06-14 13:21:22,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:22,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:22,451 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 13:21:22,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:21:22,451 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:22,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1328034654, now seen corresponding path program 3 times [2024-06-14 13:21:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974920427] [2024-06-14 13:21:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:24,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974920427] [2024-06-14 13:21:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974920427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:24,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620589033] [2024-06-14 13:21:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:24,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:24,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:24,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 136 transitions, 1184 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:24,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:24,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:26,088 INFO L124 PetriNetUnfolderBase]: 1583/2532 cut-off events. [2024-06-14 13:21:26,089 INFO L125 PetriNetUnfolderBase]: For 52104/52104 co-relation queries the response was YES. [2024-06-14 13:21:26,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15390 conditions, 2532 events. 1583/2532 cut-off events. For 52104/52104 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13079 event pairs, 382 based on Foata normal form. 3/2530 useless extension candidates. Maximal degree in co-relation 15332. Up to 2173 conditions per place. [2024-06-14 13:21:26,118 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 57 changer transitions 0/170 dead transitions. [2024-06-14 13:21:26,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 170 transitions, 1776 flow [2024-06-14 13:21:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:21:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 13:21:26,120 INFO L175 Difference]: Start difference. First operand has 118 places, 136 transitions, 1184 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:21:26,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 170 transitions, 1776 flow [2024-06-14 13:21:26,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 170 transitions, 1720 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 13:21:26,236 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1492 flow [2024-06-14 13:21:26,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-14 13:21:26,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-14 13:21:26,237 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1492 flow [2024-06-14 13:21:26,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:26,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:26,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:21:26,238 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:26,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1328242199, now seen corresponding path program 3 times [2024-06-14 13:21:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422892621] [2024-06-14 13:21:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422892621] [2024-06-14 13:21:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422892621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:28,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798855170] [2024-06-14 13:21:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:28,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:28,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:28,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1492 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:28,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:28,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:28,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:29,395 INFO L124 PetriNetUnfolderBase]: 1659/2621 cut-off events. [2024-06-14 13:21:29,396 INFO L125 PetriNetUnfolderBase]: For 58902/58902 co-relation queries the response was YES. [2024-06-14 13:21:29,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16948 conditions, 2621 events. 1659/2621 cut-off events. For 58902/58902 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13436 event pairs, 425 based on Foata normal form. 3/2623 useless extension candidates. Maximal degree in co-relation 16887. Up to 2548 conditions per place. [2024-06-14 13:21:29,414 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 143 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-14 13:21:29,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 167 transitions, 1898 flow [2024-06-14 13:21:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 13:21:29,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-14 13:21:29,416 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1492 flow. Second operand 7 states and 103 transitions. [2024-06-14 13:21:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 167 transitions, 1898 flow [2024-06-14 13:21:29,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 1794 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 13:21:29,477 INFO L231 Difference]: Finished difference. Result has 129 places, 154 transitions, 1494 flow [2024-06-14 13:21:29,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1494, PETRI_PLACES=129, PETRI_TRANSITIONS=154} [2024-06-14 13:21:29,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 13:21:29,478 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 154 transitions, 1494 flow [2024-06-14 13:21:29,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:29,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:29,478 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 13:21:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:21:29,478 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:29,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1250157393, now seen corresponding path program 1 times [2024-06-14 13:21:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:29,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124784087] [2024-06-14 13:21:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124784087] [2024-06-14 13:21:32,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124784087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:32,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:32,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288781482] [2024-06-14 13:21:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:32,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:32,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 154 transitions, 1494 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:32,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:32,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:32,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:33,387 INFO L124 PetriNetUnfolderBase]: 1654/2614 cut-off events. [2024-06-14 13:21:33,387 INFO L125 PetriNetUnfolderBase]: For 60661/60661 co-relation queries the response was YES. [2024-06-14 13:21:33,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17034 conditions, 2614 events. 1654/2614 cut-off events. For 60661/60661 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13370 event pairs, 421 based on Foata normal form. 2/2615 useless extension candidates. Maximal degree in co-relation 16971. Up to 2544 conditions per place. [2024-06-14 13:21:33,405 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 150 selfloop transitions, 15 changer transitions 0/169 dead transitions. [2024-06-14 13:21:33,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1879 flow [2024-06-14 13:21:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-14 13:21:33,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-14 13:21:33,407 INFO L175 Difference]: Start difference. First operand has 129 places, 154 transitions, 1494 flow. Second operand 7 states and 102 transitions. [2024-06-14 13:21:33,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1879 flow [2024-06-14 13:21:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 169 transitions, 1822 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:33,458 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1501 flow [2024-06-14 13:21:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1501, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-14 13:21:33,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 13:21:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1501 flow [2024-06-14 13:21:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:33,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:33,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:21:33,460 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:33,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2064325938, now seen corresponding path program 1 times [2024-06-14 13:21:33,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:33,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572281098] [2024-06-14 13:21:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:36,140 INFO 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 13:21:36,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572281098] [2024-06-14 13:21:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572281098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:36,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:36,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:36,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679326580] [2024-06-14 13:21:36,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:36,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:36,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:36,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:36,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1501 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:36,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:36,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:36,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:37,287 INFO L124 PetriNetUnfolderBase]: 1709/2723 cut-off events. [2024-06-14 13:21:37,288 INFO L125 PetriNetUnfolderBase]: For 71132/71132 co-relation queries the response was YES. [2024-06-14 13:21:37,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18200 conditions, 2723 events. 1709/2723 cut-off events. For 71132/71132 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14163 event pairs, 388 based on Foata normal form. 12/2732 useless extension candidates. Maximal degree in co-relation 18136. Up to 2238 conditions per place. [2024-06-14 13:21:37,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-06-14 13:21:37,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 2249 flow [2024-06-14 13:21:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:21:37,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:21:37,308 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1501 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:21:37,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 2249 flow [2024-06-14 13:21:37,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 198 transitions, 2204 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:37,367 INFO L231 Difference]: Finished difference. Result has 135 places, 163 transitions, 1663 flow [2024-06-14 13:21:37,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1663, PETRI_PLACES=135, PETRI_TRANSITIONS=163} [2024-06-14 13:21:37,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-14 13:21:37,368 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 163 transitions, 1663 flow [2024-06-14 13:21:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:37,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:37,369 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 13:21:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:21:37,369 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:37,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -621380040, now seen corresponding path program 2 times [2024-06-14 13:21:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094164425] [2024-06-14 13:21:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:40,215 INFO 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 13:21:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094164425] [2024-06-14 13:21:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094164425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65745311] [2024-06-14 13:21:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:40,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:40,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 163 transitions, 1663 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:40,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:40,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:40,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:41,279 INFO L124 PetriNetUnfolderBase]: 1675/2676 cut-off events. [2024-06-14 13:21:41,280 INFO L125 PetriNetUnfolderBase]: For 75546/75546 co-relation queries the response was YES. [2024-06-14 13:21:41,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18321 conditions, 2676 events. 1675/2676 cut-off events. For 75546/75546 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13958 event pairs, 438 based on Foata normal form. 13/2686 useless extension candidates. Maximal degree in co-relation 18255. Up to 2438 conditions per place. [2024-06-14 13:21:41,301 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 28 changer transitions 0/188 dead transitions. [2024-06-14 13:21:41,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 188 transitions, 2107 flow [2024-06-14 13:21:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:21:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 13:21:41,303 INFO L175 Difference]: Start difference. First operand has 135 places, 163 transitions, 1663 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:21:41,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 188 transitions, 2107 flow [2024-06-14 13:21:41,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 2040 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:21:41,388 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1669 flow [2024-06-14 13:21:41,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1669, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2024-06-14 13:21:41,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 13:21:41,389 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1669 flow [2024-06-14 13:21:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:41,389 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 13:21:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:21:41,389 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:41,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash -621379916, now seen corresponding path program 1 times [2024-06-14 13:21:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083669103] [2024-06-14 13:21:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083669103] [2024-06-14 13:21:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083669103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601993508] [2024-06-14 13:21:44,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:44,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:44,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1669 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:44,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:44,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:44,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:45,185 INFO L124 PetriNetUnfolderBase]: 1757/2771 cut-off events. [2024-06-14 13:21:45,185 INFO L125 PetriNetUnfolderBase]: For 79539/79539 co-relation queries the response was YES. [2024-06-14 13:21:45,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19317 conditions, 2771 events. 1757/2771 cut-off events. For 79539/79539 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14344 event pairs, 439 based on Foata normal form. 2/2772 useless extension candidates. Maximal degree in co-relation 19248. Up to 2636 conditions per place. [2024-06-14 13:21:45,205 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 39 changer transitions 0/201 dead transitions. [2024-06-14 13:21:45,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 201 transitions, 2356 flow [2024-06-14 13:21:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:21:45,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 13:21:45,208 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1669 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:21:45,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 201 transitions, 2356 flow [2024-06-14 13:21:45,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 2272 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:45,287 INFO L231 Difference]: Finished difference. Result has 144 places, 175 transitions, 1861 flow [2024-06-14 13:21:45,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=144, PETRI_TRANSITIONS=175} [2024-06-14 13:21:45,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 13:21:45,288 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 175 transitions, 1861 flow [2024-06-14 13:21:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:45,288 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 13:21:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:21:45,288 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:45,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash -618583530, now seen corresponding path program 3 times [2024-06-14 13:21:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:45,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602935653] [2024-06-14 13:21:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602935653] [2024-06-14 13:21:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602935653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759874807] [2024-06-14 13:21:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:49,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:49,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 175 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:49,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:49,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:49,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:50,192 INFO L124 PetriNetUnfolderBase]: 1745/2778 cut-off events. [2024-06-14 13:21:50,192 INFO L125 PetriNetUnfolderBase]: For 86754/86754 co-relation queries the response was YES. [2024-06-14 13:21:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19590 conditions, 2778 events. 1745/2778 cut-off events. For 86754/86754 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14536 event pairs, 443 based on Foata normal form. 14/2789 useless extension candidates. Maximal degree in co-relation 19519. Up to 2539 conditions per place. [2024-06-14 13:21:50,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2024-06-14 13:21:50,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2365 flow [2024-06-14 13:21:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:21:50,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 13:21:50,214 INFO L175 Difference]: Start difference. First operand has 144 places, 175 transitions, 1861 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:21:50,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2365 flow [2024-06-14 13:21:50,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 199 transitions, 2269 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:50,295 INFO L231 Difference]: Finished difference. Result has 148 places, 177 transitions, 1865 flow [2024-06-14 13:21:50,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1865, PETRI_PLACES=148, PETRI_TRANSITIONS=177} [2024-06-14 13:21:50,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 13:21:50,296 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 177 transitions, 1865 flow [2024-06-14 13:21:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:21:50,297 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:50,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash -106851078, now seen corresponding path program 4 times [2024-06-14 13:21:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101657431] [2024-06-14 13:21:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:52,653 INFO 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 13:21:52,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:52,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101657431] [2024-06-14 13:21:52,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101657431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:52,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372504738] [2024-06-14 13:21:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:52,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:21:52,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 177 transitions, 1865 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:52,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:52,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:21:52,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:53,654 INFO L124 PetriNetUnfolderBase]: 1760/2798 cut-off events. [2024-06-14 13:21:53,654 INFO L125 PetriNetUnfolderBase]: For 89474/89474 co-relation queries the response was YES. [2024-06-14 13:21:53,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 2798 events. 1760/2798 cut-off events. For 89474/89474 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14729 event pairs, 454 based on Foata normal form. 12/2805 useless extension candidates. Maximal degree in co-relation 19842. Up to 2583 conditions per place. [2024-06-14 13:21:53,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 33 changer transitions 0/196 dead transitions. [2024-06-14 13:21:53,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 196 transitions, 2339 flow [2024-06-14 13:21:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:21:53,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:21:53,679 INFO L175 Difference]: Start difference. First operand has 148 places, 177 transitions, 1865 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:21:53,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 196 transitions, 2339 flow [2024-06-14 13:21:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 2283 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:53,774 INFO L231 Difference]: Finished difference. Result has 150 places, 179 transitions, 1925 flow [2024-06-14 13:21:53,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1925, PETRI_PLACES=150, PETRI_TRANSITIONS=179} [2024-06-14 13:21:53,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:21:53,775 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 179 transitions, 1925 flow [2024-06-14 13:21:53,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:53,775 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 13:21:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:21:53,776 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:53,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1780596210, now seen corresponding path program 2 times [2024-06-14 13:21:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327313613] [2024-06-14 13:21:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:56,585 INFO 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 13:21:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327313613] [2024-06-14 13:21:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327313613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:56,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:56,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712312148] [2024-06-14 13:21:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:56,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:56,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:21:56,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 179 transitions, 1925 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:56,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:56,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:21:56,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:57,812 INFO L124 PetriNetUnfolderBase]: 1837/2895 cut-off events. [2024-06-14 13:21:57,812 INFO L125 PetriNetUnfolderBase]: For 89312/89312 co-relation queries the response was YES. [2024-06-14 13:21:57,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 2895 events. 1837/2895 cut-off events. For 89312/89312 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15114 event pairs, 442 based on Foata normal form. 2/2896 useless extension candidates. Maximal degree in co-relation 20662. Up to 2787 conditions per place. [2024-06-14 13:21:57,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 34 changer transitions 0/203 dead transitions. [2024-06-14 13:21:57,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 2504 flow [2024-06-14 13:21:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:21:57,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-14 13:21:57,837 INFO L175 Difference]: Start difference. First operand has 150 places, 179 transitions, 1925 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:21:57,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 2504 flow [2024-06-14 13:21:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 203 transitions, 2428 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:57,934 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 1999 flow [2024-06-14 13:21:57,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1999, PETRI_PLACES=154, PETRI_TRANSITIONS=184} [2024-06-14 13:21:57,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 13:21:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 1999 flow [2024-06-14 13:21:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:57,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:57,936 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 13:21:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:21:57,936 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:57,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash -100417214, now seen corresponding path program 3 times [2024-06-14 13:21:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905797851] [2024-06-14 13:21:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905797851] [2024-06-14 13:22:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905797851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:00,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383343770] [2024-06-14 13:22:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:00,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 184 transitions, 1999 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:01,582 INFO L124 PetriNetUnfolderBase]: 1831/2887 cut-off events. [2024-06-14 13:22:01,583 INFO L125 PetriNetUnfolderBase]: For 91635/91635 co-relation queries the response was YES. [2024-06-14 13:22:01,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20699 conditions, 2887 events. 1831/2887 cut-off events. For 91635/91635 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15089 event pairs, 442 based on Foata normal form. 2/2888 useless extension candidates. Maximal degree in co-relation 20624. Up to 2804 conditions per place. [2024-06-14 13:22:01,607 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-14 13:22:01,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2448 flow [2024-06-14 13:22:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-14 13:22:01,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2024-06-14 13:22:01,608 INFO L175 Difference]: Start difference. First operand has 154 places, 184 transitions, 1999 flow. Second operand 9 states and 125 transitions. [2024-06-14 13:22:01,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2448 flow [2024-06-14 13:22:01,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 201 transitions, 2360 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:01,706 INFO L231 Difference]: Finished difference. Result has 158 places, 185 transitions, 1981 flow [2024-06-14 13:22:01,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=158, PETRI_TRANSITIONS=185} [2024-06-14 13:22:01,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:22:01,707 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 185 transitions, 1981 flow [2024-06-14 13:22:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:01,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:01,707 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 13:22:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:22:01,708 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1649079905, now seen corresponding path program 1 times [2024-06-14 13:22:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360758302] [2024-06-14 13:22:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:04,687 INFO 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 13:22:04,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:04,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360758302] [2024-06-14 13:22:04,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360758302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:04,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:04,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:04,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133841830] [2024-06-14 13:22:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:04,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:04,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:04,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:04,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:04,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 185 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:04,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:04,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:04,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:05,804 INFO L124 PetriNetUnfolderBase]: 1839/2896 cut-off events. [2024-06-14 13:22:05,805 INFO L125 PetriNetUnfolderBase]: For 95685/95685 co-relation queries the response was YES. [2024-06-14 13:22:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20872 conditions, 2896 events. 1839/2896 cut-off events. For 95685/95685 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15048 event pairs, 346 based on Foata normal form. 2/2894 useless extension candidates. Maximal degree in co-relation 20795. Up to 2738 conditions per place. [2024-06-14 13:22:05,830 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 184 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-14 13:22:05,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2571 flow [2024-06-14 13:22:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 13:22:05,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:22:05,832 INFO L175 Difference]: Start difference. First operand has 158 places, 185 transitions, 1981 flow. Second operand 6 states and 99 transitions. [2024-06-14 13:22:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2571 flow [2024-06-14 13:22:05,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 207 transitions, 2517 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:05,944 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2048 flow [2024-06-14 13:22:05,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2048, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-14 13:22:05,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-14 13:22:05,945 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2048 flow [2024-06-14 13:22:05,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:05,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:05,945 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 13:22:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:22:05,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:05,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 783276587, now seen corresponding path program 2 times [2024-06-14 13:22:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736483089] [2024-06-14 13:22:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:05,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:09,050 INFO 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 13:22:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736483089] [2024-06-14 13:22:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736483089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:09,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:09,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627842087] [2024-06-14 13:22:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:09,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:09,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:09,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2048 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:09,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:09,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:09,993 INFO L124 PetriNetUnfolderBase]: 1834/2889 cut-off events. [2024-06-14 13:22:09,993 INFO L125 PetriNetUnfolderBase]: For 98922/98922 co-relation queries the response was YES. [2024-06-14 13:22:10,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20965 conditions, 2889 events. 1834/2889 cut-off events. For 98922/98922 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15074 event pairs, 457 based on Foata normal form. 2/2887 useless extension candidates. Maximal degree in co-relation 20887. Up to 2780 conditions per place. [2024-06-14 13:22:10,029 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 179 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2024-06-14 13:22:10,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2470 flow [2024-06-14 13:22:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 13:22:10,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:22:10,033 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2048 flow. Second operand 6 states and 94 transitions. [2024-06-14 13:22:10,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2470 flow [2024-06-14 13:22:10,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 201 transitions, 2398 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:10,202 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 2017 flow [2024-06-14 13:22:10,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-06-14 13:22:10,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 13:22:10,202 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 2017 flow [2024-06-14 13:22:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:10,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:10,203 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 13:22:10,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:22:10,203 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2102970669, now seen corresponding path program 1 times [2024-06-14 13:22:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:10,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607617346] [2024-06-14 13:22:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:14,045 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 13:22:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607617346] [2024-06-14 13:22:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607617346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:14,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:14,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:14,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803729749] [2024-06-14 13:22:14,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:14,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:14,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:14,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 2017 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:14,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:14,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:14,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:15,024 INFO L124 PetriNetUnfolderBase]: 1867/2944 cut-off events. [2024-06-14 13:22:15,024 INFO L125 PetriNetUnfolderBase]: For 103375/103378 co-relation queries the response was YES. [2024-06-14 13:22:15,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 2944 events. 1867/2944 cut-off events. For 103375/103378 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15370 event pairs, 451 based on Foata normal form. 1/2943 useless extension candidates. Maximal degree in co-relation 21301. Up to 2788 conditions per place. [2024-06-14 13:22:15,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-14 13:22:15,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 216 transitions, 2637 flow [2024-06-14 13:22:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:22:15,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-14 13:22:15,061 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 2017 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:22:15,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 216 transitions, 2637 flow [2024-06-14 13:22:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 2589 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:15,204 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2236 flow [2024-06-14 13:22:15,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2236, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-06-14 13:22:15,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 13:22:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2236 flow [2024-06-14 13:22:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:15,205 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 13:22:15,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:22:15,206 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1468790136, now seen corresponding path program 1 times [2024-06-14 13:22:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298834461] [2024-06-14 13:22:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:17,769 INFO 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 13:22:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:17,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298834461] [2024-06-14 13:22:17,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298834461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:17,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:17,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120944251] [2024-06-14 13:22:17,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:17,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2236 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:17,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:17,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:18,947 INFO L124 PetriNetUnfolderBase]: 1923/3034 cut-off events. [2024-06-14 13:22:18,947 INFO L125 PetriNetUnfolderBase]: For 112712/112717 co-relation queries the response was YES. [2024-06-14 13:22:18,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22541 conditions, 3034 events. 1923/3034 cut-off events. For 112712/112717 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15899 event pairs, 451 based on Foata normal form. 8/3040 useless extension candidates. Maximal degree in co-relation 22457. Up to 2887 conditions per place. [2024-06-14 13:22:18,973 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-14 13:22:18,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 233 transitions, 2968 flow [2024-06-14 13:22:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:22:18,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 13:22:18,975 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2236 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:22:18,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 233 transitions, 2968 flow [2024-06-14 13:22:19,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 233 transitions, 2881 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:19,125 INFO L231 Difference]: Finished difference. Result has 173 places, 216 transitions, 2486 flow [2024-06-14 13:22:19,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2486, PETRI_PLACES=173, PETRI_TRANSITIONS=216} [2024-06-14 13:22:19,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 13:22:19,128 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 216 transitions, 2486 flow [2024-06-14 13:22:19,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:19,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:19,128 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 13:22:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:22:19,128 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:19,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1653883679, now seen corresponding path program 2 times [2024-06-14 13:22:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:19,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680328747] [2024-06-14 13:22:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680328747] [2024-06-14 13:22:22,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680328747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:22,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:22,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516757125] [2024-06-14 13:22:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:22,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:22,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 216 transitions, 2486 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:22,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:22,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:22,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:23,738 INFO L124 PetriNetUnfolderBase]: 1928/3041 cut-off events. [2024-06-14 13:22:23,739 INFO L125 PetriNetUnfolderBase]: For 117920/117925 co-relation queries the response was YES. [2024-06-14 13:22:23,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23146 conditions, 3041 events. 1928/3041 cut-off events. For 117920/117925 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15945 event pairs, 452 based on Foata normal form. 5/3044 useless extension candidates. Maximal degree in co-relation 23058. Up to 2877 conditions per place. [2024-06-14 13:22:23,766 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 32 changer transitions 0/234 dead transitions. [2024-06-14 13:22:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 234 transitions, 3062 flow [2024-06-14 13:22:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:22:23,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 13:22:23,770 INFO L175 Difference]: Start difference. First operand has 173 places, 216 transitions, 2486 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:22:23,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 234 transitions, 3062 flow [2024-06-14 13:22:23,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 234 transitions, 2957 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:23,926 INFO L231 Difference]: Finished difference. Result has 177 places, 219 transitions, 2538 flow [2024-06-14 13:22:23,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=177, PETRI_TRANSITIONS=219} [2024-06-14 13:22:23,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 13:22:23,935 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 219 transitions, 2538 flow [2024-06-14 13:22:23,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:23,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:23,936 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 13:22:23,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:22:23,936 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:23,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash -961800402, now seen corresponding path program 2 times [2024-06-14 13:22:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:23,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511630134] [2024-06-14 13:22:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:26,509 INFO 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 13:22:26,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:26,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511630134] [2024-06-14 13:22:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511630134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:26,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:26,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508056854] [2024-06-14 13:22:26,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:26,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:26,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 219 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:26,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:26,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:26,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:27,910 INFO L124 PetriNetUnfolderBase]: 1963/3087 cut-off events. [2024-06-14 13:22:27,910 INFO L125 PetriNetUnfolderBase]: For 129564/129567 co-relation queries the response was YES. [2024-06-14 13:22:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23803 conditions, 3087 events. 1963/3087 cut-off events. For 129564/129567 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16162 event pairs, 454 based on Foata normal form. 7/3091 useless extension candidates. Maximal degree in co-relation 23714. Up to 2904 conditions per place. [2024-06-14 13:22:27,953 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 40 changer transitions 0/243 dead transitions. [2024-06-14 13:22:27,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 243 transitions, 3269 flow [2024-06-14 13:22:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:22:27,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 13:22:27,955 INFO L175 Difference]: Start difference. First operand has 177 places, 219 transitions, 2538 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:22:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 243 transitions, 3269 flow [2024-06-14 13:22:28,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 243 transitions, 3136 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:28,192 INFO L231 Difference]: Finished difference. Result has 179 places, 225 transitions, 2656 flow [2024-06-14 13:22:28,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2656, PETRI_PLACES=179, PETRI_TRANSITIONS=225} [2024-06-14 13:22:28,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-14 13:22:28,193 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 225 transitions, 2656 flow [2024-06-14 13:22:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:28,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:28,193 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 13:22:28,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:22:28,194 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:28,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1657603090, now seen corresponding path program 3 times [2024-06-14 13:22:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989478461] [2024-06-14 13:22:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:28,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989478461] [2024-06-14 13:22:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989478461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:30,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909038063] [2024-06-14 13:22:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:30,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:30,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 225 transitions, 2656 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:30,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:30,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:30,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:31,842 INFO L124 PetriNetUnfolderBase]: 1998/3140 cut-off events. [2024-06-14 13:22:31,843 INFO L125 PetriNetUnfolderBase]: For 136270/136273 co-relation queries the response was YES. [2024-06-14 13:22:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24715 conditions, 3140 events. 1998/3140 cut-off events. For 136270/136273 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16474 event pairs, 454 based on Foata normal form. 5/3142 useless extension candidates. Maximal degree in co-relation 24625. Up to 2914 conditions per place. [2024-06-14 13:22:31,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 60 changer transitions 0/259 dead transitions. [2024-06-14 13:22:31,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 259 transitions, 3525 flow [2024-06-14 13:22:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:22:31,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:22:31,873 INFO L175 Difference]: Start difference. First operand has 179 places, 225 transitions, 2656 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:22:31,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 259 transitions, 3525 flow [2024-06-14 13:22:32,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 259 transitions, 3383 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:32,050 INFO L231 Difference]: Finished difference. Result has 183 places, 235 transitions, 2884 flow [2024-06-14 13:22:32,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2884, PETRI_PLACES=183, PETRI_TRANSITIONS=235} [2024-06-14 13:22:32,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 13:22:32,051 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 235 transitions, 2884 flow [2024-06-14 13:22:32,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:32,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:32,051 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 13:22:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:22:32,051 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:32,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash -961792466, now seen corresponding path program 1 times [2024-06-14 13:22:32,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:32,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146170442] [2024-06-14 13:22:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:32,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146170442] [2024-06-14 13:22:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146170442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:35,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:35,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914116588] [2024-06-14 13:22:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:35,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:35,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:35,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 235 transitions, 2884 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:35,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:35,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:35,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:37,075 INFO L124 PetriNetUnfolderBase]: 2042/3208 cut-off events. [2024-06-14 13:22:37,076 INFO L125 PetriNetUnfolderBase]: For 149981/149984 co-relation queries the response was YES. [2024-06-14 13:22:37,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25640 conditions, 3208 events. 2042/3208 cut-off events. For 149981/149984 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16925 event pairs, 451 based on Foata normal form. 12/3217 useless extension candidates. Maximal degree in co-relation 25548. Up to 2999 conditions per place. [2024-06-14 13:22:37,105 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 222 selfloop transitions, 30 changer transitions 0/256 dead transitions. [2024-06-14 13:22:37,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 256 transitions, 3561 flow [2024-06-14 13:22:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:22:37,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 13:22:37,107 INFO L175 Difference]: Start difference. First operand has 183 places, 235 transitions, 2884 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:22:37,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 256 transitions, 3561 flow [2024-06-14 13:22:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 256 transitions, 3389 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:37,304 INFO L231 Difference]: Finished difference. Result has 184 places, 236 transitions, 2801 flow [2024-06-14 13:22:37,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2801, PETRI_PLACES=184, PETRI_TRANSITIONS=236} [2024-06-14 13:22:37,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 13:22:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 236 transitions, 2801 flow [2024-06-14 13:22:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:37,305 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 13:22:37,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:22:37,305 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:37,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1630685361, now seen corresponding path program 3 times [2024-06-14 13:22:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:37,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203650270] [2024-06-14 13:22:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:40,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:40,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203650270] [2024-06-14 13:22:40,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203650270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:40,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:40,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:40,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212236188] [2024-06-14 13:22:40,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:40,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:40,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 236 transitions, 2801 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:40,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:40,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:40,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:41,377 INFO L124 PetriNetUnfolderBase]: 2039/3204 cut-off events. [2024-06-14 13:22:41,377 INFO L125 PetriNetUnfolderBase]: For 139212/139215 co-relation queries the response was YES. [2024-06-14 13:22:41,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25397 conditions, 3204 events. 2039/3204 cut-off events. For 139212/139215 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16909 event pairs, 467 based on Foata normal form. 1/3202 useless extension candidates. Maximal degree in co-relation 25305. Up to 2957 conditions per place. [2024-06-14 13:22:41,410 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 63 changer transitions 0/254 dead transitions. [2024-06-14 13:22:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 254 transitions, 3433 flow [2024-06-14 13:22:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:22:41,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:22:41,412 INFO L175 Difference]: Start difference. First operand has 184 places, 236 transitions, 2801 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:22:41,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 254 transitions, 3433 flow [2024-06-14 13:22:41,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 3375 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:41,586 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 2993 flow [2024-06-14 13:22:41,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2993, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-14 13:22:41,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 13:22:41,587 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 2993 flow [2024-06-14 13:22:41,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:41,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:41,587 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 13:22:41,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:22:41,587 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:41,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:41,588 INFO L85 PathProgramCache]: Analyzing trace with hash 192199002, now seen corresponding path program 4 times [2024-06-14 13:22:41,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:41,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125274773] [2024-06-14 13:22:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:41,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:44,410 INFO 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 13:22:44,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:44,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125274773] [2024-06-14 13:22:44,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125274773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:44,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:44,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:44,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446884229] [2024-06-14 13:22:44,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:44,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:44,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:44,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:44,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 2993 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:44,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:45,672 INFO L124 PetriNetUnfolderBase]: 2064/3244 cut-off events. [2024-06-14 13:22:45,673 INFO L125 PetriNetUnfolderBase]: For 150780/150785 co-relation queries the response was YES. [2024-06-14 13:22:45,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26222 conditions, 3244 events. 2064/3244 cut-off events. For 150780/150785 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17175 event pairs, 462 based on Foata normal form. 8/3250 useless extension candidates. Maximal degree in co-relation 26129. Up to 3078 conditions per place. [2024-06-14 13:22:45,703 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 29 changer transitions 0/268 dead transitions. [2024-06-14 13:22:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3742 flow [2024-06-14 13:22:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:22:45,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:22:45,704 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 2993 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:22:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3742 flow [2024-06-14 13:22:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 268 transitions, 3547 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:45,893 INFO L231 Difference]: Finished difference. Result has 190 places, 246 transitions, 3038 flow [2024-06-14 13:22:45,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3038, PETRI_PLACES=190, PETRI_TRANSITIONS=246} [2024-06-14 13:22:45,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 13:22:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 246 transitions, 3038 flow [2024-06-14 13:22:45,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:45,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:45,895 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 13:22:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:22:45,896 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:45,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 516940122, now seen corresponding path program 5 times [2024-06-14 13:22:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:45,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573814064] [2024-06-14 13:22:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:48,694 INFO 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 13:22:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:48,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573814064] [2024-06-14 13:22:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573814064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154619563] [2024-06-14 13:22:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:48,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:48,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 246 transitions, 3038 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:48,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:48,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:48,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:49,912 INFO L124 PetriNetUnfolderBase]: 2089/3277 cut-off events. [2024-06-14 13:22:49,912 INFO L125 PetriNetUnfolderBase]: For 151493/151498 co-relation queries the response was YES. [2024-06-14 13:22:49,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26509 conditions, 3277 events. 2089/3277 cut-off events. For 151493/151498 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17322 event pairs, 464 based on Foata normal form. 8/3283 useless extension candidates. Maximal degree in co-relation 26414. Up to 3079 conditions per place. [2024-06-14 13:22:49,944 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 223 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-14 13:22:49,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 270 transitions, 3730 flow [2024-06-14 13:22:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:22:49,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:22:49,945 INFO L175 Difference]: Start difference. First operand has 190 places, 246 transitions, 3038 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:22:49,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 270 transitions, 3730 flow [2024-06-14 13:22:50,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 270 transitions, 3571 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:50,120 INFO L231 Difference]: Finished difference. Result has 194 places, 252 transitions, 3064 flow [2024-06-14 13:22:50,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=194, PETRI_TRANSITIONS=252} [2024-06-14 13:22:50,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 13:22:50,125 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 252 transitions, 3064 flow [2024-06-14 13:22:50,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:50,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:50,125 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 13:22:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:22:50,126 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:50,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -360577130, now seen corresponding path program 6 times [2024-06-14 13:22:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429002735] [2024-06-14 13:22:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:53,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:53,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429002735] [2024-06-14 13:22:53,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429002735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:53,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:53,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33999527] [2024-06-14 13:22:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:53,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:53,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 252 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:53,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:53,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:53,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:54,301 INFO L124 PetriNetUnfolderBase]: 2091/3282 cut-off events. [2024-06-14 13:22:54,301 INFO L125 PetriNetUnfolderBase]: For 153961/153966 co-relation queries the response was YES. [2024-06-14 13:22:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26675 conditions, 3282 events. 2091/3282 cut-off events. For 153961/153966 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17376 event pairs, 462 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 26580. Up to 3072 conditions per place. [2024-06-14 13:22:54,345 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 48 changer transitions 0/276 dead transitions. [2024-06-14 13:22:54,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 3824 flow [2024-06-14 13:22:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:22:54,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:22:54,347 INFO L175 Difference]: Start difference. First operand has 194 places, 252 transitions, 3064 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:22:54,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 3824 flow [2024-06-14 13:22:54,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 3696 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:54,626 INFO L231 Difference]: Finished difference. Result has 199 places, 258 transitions, 3231 flow [2024-06-14 13:22:54,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3231, PETRI_PLACES=199, PETRI_TRANSITIONS=258} [2024-06-14 13:22:54,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 13:22:54,627 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 258 transitions, 3231 flow [2024-06-14 13:22:54,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:54,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:54,627 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 13:22:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:22:54,627 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:54,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 982340338, now seen corresponding path program 7 times [2024-06-14 13:22:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:54,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829259679] [2024-06-14 13:22:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829259679] [2024-06-14 13:22:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829259679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:57,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:57,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:57,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240852643] [2024-06-14 13:22:57,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:57,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:57,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:22:57,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 258 transitions, 3231 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:57,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:57,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:22:57,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:58,685 INFO L124 PetriNetUnfolderBase]: 2111/3309 cut-off events. [2024-06-14 13:22:58,685 INFO L125 PetriNetUnfolderBase]: For 162396/162399 co-relation queries the response was YES. [2024-06-14 13:22:58,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27348 conditions, 3309 events. 2111/3309 cut-off events. For 162396/162399 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17507 event pairs, 470 based on Foata normal form. 4/3310 useless extension candidates. Maximal degree in co-relation 27251. Up to 3142 conditions per place. [2024-06-14 13:22:58,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 39 changer transitions 0/280 dead transitions. [2024-06-14 13:22:58,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 280 transitions, 4006 flow [2024-06-14 13:22:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:22:58,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 13:22:58,721 INFO L175 Difference]: Start difference. First operand has 199 places, 258 transitions, 3231 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:22:58,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 280 transitions, 4006 flow [2024-06-14 13:22:58,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 3866 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:58,912 INFO L231 Difference]: Finished difference. Result has 203 places, 262 transitions, 3310 flow [2024-06-14 13:22:58,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3310, PETRI_PLACES=203, PETRI_TRANSITIONS=262} [2024-06-14 13:22:58,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 13:22:58,913 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 262 transitions, 3310 flow [2024-06-14 13:22:58,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:58,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:58,913 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 13:22:58,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:22:58,914 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:58,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash 636230904, now seen corresponding path program 8 times [2024-06-14 13:22:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:58,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585855308] [2024-06-14 13:22:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:01,550 INFO 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 13:23:01,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:01,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585855308] [2024-06-14 13:23:01,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585855308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:01,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:01,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844122976] [2024-06-14 13:23:01,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:01,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:01,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:01,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 262 transitions, 3310 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:01,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:01,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:01,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:03,140 INFO L124 PetriNetUnfolderBase]: 2238/3498 cut-off events. [2024-06-14 13:23:03,141 INFO L125 PetriNetUnfolderBase]: For 194101/194104 co-relation queries the response was YES. [2024-06-14 13:23:03,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 3498 events. 2238/3498 cut-off events. For 194101/194104 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18659 event pairs, 465 based on Foata normal form. 4/3499 useless extension candidates. Maximal degree in co-relation 30384. Up to 3017 conditions per place. [2024-06-14 13:23:03,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 229 selfloop transitions, 80 changer transitions 0/313 dead transitions. [2024-06-14 13:23:03,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 313 transitions, 4898 flow [2024-06-14 13:23:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:23:03,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:23:03,191 INFO L175 Difference]: Start difference. First operand has 203 places, 262 transitions, 3310 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:23:03,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 313 transitions, 4898 flow [2024-06-14 13:23:03,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 313 transitions, 4666 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:03,495 INFO L231 Difference]: Finished difference. Result has 207 places, 278 transitions, 3812 flow [2024-06-14 13:23:03,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3812, PETRI_PLACES=207, PETRI_TRANSITIONS=278} [2024-06-14 13:23:03,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:23:03,495 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 278 transitions, 3812 flow [2024-06-14 13:23:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:03,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:03,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:23:03,496 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:03,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash 629767404, now seen corresponding path program 9 times [2024-06-14 13:23:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:03,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923519006] [2024-06-14 13:23:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:05,839 INFO 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 13:23:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923519006] [2024-06-14 13:23:05,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923519006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:05,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:05,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749612463] [2024-06-14 13:23:05,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:05,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:05,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 278 transitions, 3812 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:05,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:05,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:05,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:07,212 INFO L124 PetriNetUnfolderBase]: 2255/3514 cut-off events. [2024-06-14 13:23:07,213 INFO L125 PetriNetUnfolderBase]: For 207234/207237 co-relation queries the response was YES. [2024-06-14 13:23:07,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31563 conditions, 3514 events. 2255/3514 cut-off events. For 207234/207237 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18684 event pairs, 467 based on Foata normal form. 5/3516 useless extension candidates. Maximal degree in co-relation 31462. Up to 3347 conditions per place. [2024-06-14 13:23:07,253 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 33 changer transitions 0/308 dead transitions. [2024-06-14 13:23:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 308 transitions, 4824 flow [2024-06-14 13:23:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:23:07,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 13:23:07,255 INFO L175 Difference]: Start difference. First operand has 207 places, 278 transitions, 3812 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:23:07,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 308 transitions, 4824 flow [2024-06-14 13:23:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 4665 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:07,535 INFO L231 Difference]: Finished difference. Result has 213 places, 289 transitions, 4008 flow [2024-06-14 13:23:07,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4008, PETRI_PLACES=213, PETRI_TRANSITIONS=289} [2024-06-14 13:23:07,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 13:23:07,536 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 289 transitions, 4008 flow [2024-06-14 13:23:07,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:07,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:07,536 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 13:23:07,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:23:07,537 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 13:23:07,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 835532694, now seen corresponding path program 10 times [2024-06-14 13:23:07,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:07,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147024533] [2024-06-14 13:23:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:09,781 INFO 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 13:23:09,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:09,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147024533] [2024-06-14 13:23:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147024533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:09,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383725319] [2024-06-14 13:23:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:09,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:09,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 289 transitions, 4008 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:11,133 INFO L124 PetriNetUnfolderBase]: 2256/3520 cut-off events. [2024-06-14 13:23:11,133 INFO L125 PetriNetUnfolderBase]: For 208600/208603 co-relation queries the response was YES. [2024-06-14 13:23:11,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31742 conditions, 3520 events. 2256/3520 cut-off events. For 208600/208603 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18751 event pairs, 465 based on Foata normal form. 5/3522 useless extension candidates. Maximal degree in co-relation 31637. Up to 3258 conditions per place. [2024-06-14 13:23:11,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 61 changer transitions 0/317 dead transitions. [2024-06-14 13:23:11,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 317 transitions, 5098 flow [2024-06-14 13:23:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:23:11,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:23:11,173 INFO L175 Difference]: Start difference. First operand has 213 places, 289 transitions, 4008 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:23:11,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 317 transitions, 5098 flow [2024-06-14 13:23:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 317 transitions, 4941 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:11,462 INFO L231 Difference]: Finished difference. Result has 217 places, 294 transitions, 4154 flow [2024-06-14 13:23:11,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4154, PETRI_PLACES=217, PETRI_TRANSITIONS=294} [2024-06-14 13:23:11,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-14 13:23:11,462 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 294 transitions, 4154 flow [2024-06-14 13:23:11,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:11,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:11,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:11,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:23:11,463 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:11,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 829826710, now seen corresponding path program 2 times [2024-06-14 13:23:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:11,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941992063] [2024-06-14 13:23:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:11,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:14,945 INFO 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 13:23:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941992063] [2024-06-14 13:23:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941992063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:14,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:14,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:14,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137897684] [2024-06-14 13:23:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:14,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:14,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:14,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 294 transitions, 4154 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:14,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:14,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:14,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:16,731 INFO L124 PetriNetUnfolderBase]: 2300/3590 cut-off events. [2024-06-14 13:23:16,731 INFO L125 PetriNetUnfolderBase]: For 222298/222301 co-relation queries the response was YES. [2024-06-14 13:23:16,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32365 conditions, 3590 events. 2300/3590 cut-off events. For 222298/222301 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19197 event pairs, 477 based on Foata normal form. 12/3599 useless extension candidates. Maximal degree in co-relation 32259. Up to 3363 conditions per place. [2024-06-14 13:23:16,791 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 35 changer transitions 0/316 dead transitions. [2024-06-14 13:23:16,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 316 transitions, 5019 flow [2024-06-14 13:23:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:23:16,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:23:16,793 INFO L175 Difference]: Start difference. First operand has 217 places, 294 transitions, 4154 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:23:16,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 316 transitions, 5019 flow [2024-06-14 13:23:17,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 316 transitions, 4777 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:17,275 INFO L231 Difference]: Finished difference. Result has 219 places, 295 transitions, 4011 flow [2024-06-14 13:23:17,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4011, PETRI_PLACES=219, PETRI_TRANSITIONS=295} [2024-06-14 13:23:17,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 13:23:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 295 transitions, 4011 flow [2024-06-14 13:23:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:17,277 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 13:23:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:23:17,277 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:17,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 843159190, now seen corresponding path program 3 times [2024-06-14 13:23:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451961616] [2024-06-14 13:23:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:17,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:20,955 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 13:23:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451961616] [2024-06-14 13:23:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451961616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:20,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618114667] [2024-06-14 13:23:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:20,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:20,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:20,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:20,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 295 transitions, 4011 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:20,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:20,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:20,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:22,491 INFO L124 PetriNetUnfolderBase]: 2302/3598 cut-off events. [2024-06-14 13:23:22,491 INFO L125 PetriNetUnfolderBase]: For 216705/216708 co-relation queries the response was YES. [2024-06-14 13:23:22,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32034 conditions, 3598 events. 2302/3598 cut-off events. For 216705/216708 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19226 event pairs, 460 based on Foata normal form. 8/3603 useless extension candidates. Maximal degree in co-relation 31927. Up to 3279 conditions per place. [2024-06-14 13:23:22,529 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 279 selfloop transitions, 37 changer transitions 0/320 dead transitions. [2024-06-14 13:23:22,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 320 transitions, 4936 flow [2024-06-14 13:23:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:23:22,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:23:22,531 INFO L175 Difference]: Start difference. First operand has 219 places, 295 transitions, 4011 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:23:22,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 320 transitions, 4936 flow [2024-06-14 13:23:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 320 transitions, 4862 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:22,844 INFO L231 Difference]: Finished difference. Result has 221 places, 296 transitions, 4040 flow [2024-06-14 13:23:22,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4040, PETRI_PLACES=221, PETRI_TRANSITIONS=296} [2024-06-14 13:23:22,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 13:23:22,844 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 296 transitions, 4040 flow [2024-06-14 13:23:22,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:22,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:22,845 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 13:23:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:23:22,845 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:22,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2084783530, now seen corresponding path program 1 times [2024-06-14 13:23:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:22,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555878569] [2024-06-14 13:23:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:25,544 INFO 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 13:23:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555878569] [2024-06-14 13:23:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555878569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:25,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:25,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473695979] [2024-06-14 13:23:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:25,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:25,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 296 transitions, 4040 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:25,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:25,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:25,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:27,206 INFO L124 PetriNetUnfolderBase]: 2389/3738 cut-off events. [2024-06-14 13:23:27,206 INFO L125 PetriNetUnfolderBase]: For 237860/237860 co-relation queries the response was YES. [2024-06-14 13:23:27,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33410 conditions, 3738 events. 2389/3738 cut-off events. For 237860/237860 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20277 event pairs, 482 based on Foata normal form. 8/3745 useless extension candidates. Maximal degree in co-relation 33302. Up to 3412 conditions per place. [2024-06-14 13:23:27,244 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 47 changer transitions 0/342 dead transitions. [2024-06-14 13:23:27,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 342 transitions, 5121 flow [2024-06-14 13:23:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:23:27,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 13:23:27,245 INFO L175 Difference]: Start difference. First operand has 221 places, 296 transitions, 4040 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:23:27,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 342 transitions, 5121 flow [2024-06-14 13:23:27,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 342 transitions, 5039 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:27,509 INFO L231 Difference]: Finished difference. Result has 226 places, 301 transitions, 4146 flow [2024-06-14 13:23:27,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4146, PETRI_PLACES=226, PETRI_TRANSITIONS=301} [2024-06-14 13:23:27,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 13:23:27,509 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 301 transitions, 4146 flow [2024-06-14 13:23:27,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:27,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:27,510 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 13:23:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:23:27,510 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:27,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2082905860, now seen corresponding path program 2 times [2024-06-14 13:23:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492247997] [2024-06-14 13:23:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492247997] [2024-06-14 13:23:30,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492247997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:30,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:30,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:30,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37884026] [2024-06-14 13:23:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:30,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:30,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 301 transitions, 4146 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:30,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:30,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:31,900 INFO L124 PetriNetUnfolderBase]: 2425/3794 cut-off events. [2024-06-14 13:23:31,900 INFO L125 PetriNetUnfolderBase]: For 244560/244560 co-relation queries the response was YES. [2024-06-14 13:23:31,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34023 conditions, 3794 events. 2425/3794 cut-off events. For 244560/244560 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20555 event pairs, 502 based on Foata normal form. 10/3803 useless extension candidates. Maximal degree in co-relation 33912. Up to 3585 conditions per place. [2024-06-14 13:23:31,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 45 changer transitions 0/332 dead transitions. [2024-06-14 13:23:31,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 332 transitions, 4970 flow [2024-06-14 13:23:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:23:31,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:23:31,943 INFO L175 Difference]: Start difference. First operand has 226 places, 301 transitions, 4146 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:23:31,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 332 transitions, 4970 flow [2024-06-14 13:23:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 4884 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:32,268 INFO L231 Difference]: Finished difference. Result has 231 places, 302 transitions, 4172 flow [2024-06-14 13:23:32,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4172, PETRI_PLACES=231, PETRI_TRANSITIONS=302} [2024-06-14 13:23:32,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 13:23:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 302 transitions, 4172 flow [2024-06-14 13:23:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:32,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:32,270 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 13:23:32,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:23:32,270 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:32,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 430494328, now seen corresponding path program 3 times [2024-06-14 13:23:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:32,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777268340] [2024-06-14 13:23:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:35,077 INFO 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 13:23:35,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777268340] [2024-06-14 13:23:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777268340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:35,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:35,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:35,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925962859] [2024-06-14 13:23:35,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:35,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:35,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:35,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 302 transitions, 4172 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:35,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:35,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:35,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:36,667 INFO L124 PetriNetUnfolderBase]: 2453/3838 cut-off events. [2024-06-14 13:23:36,667 INFO L125 PetriNetUnfolderBase]: For 249946/249946 co-relation queries the response was YES. [2024-06-14 13:23:36,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34463 conditions, 3838 events. 2453/3838 cut-off events. For 249946/249946 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20860 event pairs, 496 based on Foata normal form. 8/3845 useless extension candidates. Maximal degree in co-relation 34350. Up to 3591 conditions per place. [2024-06-14 13:23:36,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 47 changer transitions 0/339 dead transitions. [2024-06-14 13:23:36,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 5089 flow [2024-06-14 13:23:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:23:36,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:23:36,715 INFO L175 Difference]: Start difference. First operand has 231 places, 302 transitions, 4172 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:23:36,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 5089 flow [2024-06-14 13:23:37,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 339 transitions, 4998 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:37,025 INFO L231 Difference]: Finished difference. Result has 234 places, 305 transitions, 4237 flow [2024-06-14 13:23:37,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4237, PETRI_PLACES=234, PETRI_TRANSITIONS=305} [2024-06-14 13:23:37,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 13:23:37,027 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 305 transitions, 4237 flow [2024-06-14 13:23:37,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:37,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:37,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:23:37,031 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:37,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 517186138, now seen corresponding path program 4 times [2024-06-14 13:23:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:37,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224965507] [2024-06-14 13:23:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224965507] [2024-06-14 13:23:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224965507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:40,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:40,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314858482] [2024-06-14 13:23:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:40,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:40,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:40,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 305 transitions, 4237 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:40,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:40,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:40,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:41,568 INFO L124 PetriNetUnfolderBase]: 2514/3933 cut-off events. [2024-06-14 13:23:41,569 INFO L125 PetriNetUnfolderBase]: For 264643/264643 co-relation queries the response was YES. [2024-06-14 13:23:41,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35547 conditions, 3933 events. 2514/3933 cut-off events. For 264643/264643 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21489 event pairs, 522 based on Foata normal form. 8/3940 useless extension candidates. Maximal degree in co-relation 35432. Up to 3696 conditions per place. [2024-06-14 13:23:41,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 21 changer transitions 0/341 dead transitions. [2024-06-14 13:23:41,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 341 transitions, 5305 flow [2024-06-14 13:23:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:23:41,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-14 13:23:41,616 INFO L175 Difference]: Start difference. First operand has 234 places, 305 transitions, 4237 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:23:41,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 341 transitions, 5305 flow [2024-06-14 13:23:42,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 341 transitions, 5231 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:42,173 INFO L231 Difference]: Finished difference. Result has 240 places, 310 transitions, 4295 flow [2024-06-14 13:23:42,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4295, PETRI_PLACES=240, PETRI_TRANSITIONS=310} [2024-06-14 13:23:42,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 13:23:42,174 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 310 transitions, 4295 flow [2024-06-14 13:23:42,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:42,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:42,174 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 13:23:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:23:42,174 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:42,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash 517189858, now seen corresponding path program 5 times [2024-06-14 13:23:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823295365] [2024-06-14 13:23:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:46,281 INFO 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 13:23:46,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:46,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823295365] [2024-06-14 13:23:46,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823295365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:46,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785922874] [2024-06-14 13:23:46,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:46,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:46,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:46,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:46,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 310 transitions, 4295 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:46,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:46,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:46,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:47,703 INFO L124 PetriNetUnfolderBase]: 2519/3944 cut-off events. [2024-06-14 13:23:47,703 INFO L125 PetriNetUnfolderBase]: For 270303/270303 co-relation queries the response was YES. [2024-06-14 13:23:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35563 conditions, 3944 events. 2519/3944 cut-off events. For 270303/270303 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21569 event pairs, 531 based on Foata normal form. 12/3955 useless extension candidates. Maximal degree in co-relation 35444. Up to 3777 conditions per place. [2024-06-14 13:23:47,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 22 changer transitions 0/338 dead transitions. [2024-06-14 13:23:47,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 338 transitions, 5156 flow [2024-06-14 13:23:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:23:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:23:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-14 13:23:47,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-14 13:23:47,755 INFO L175 Difference]: Start difference. First operand has 240 places, 310 transitions, 4295 flow. Second operand 10 states and 144 transitions. [2024-06-14 13:23:47,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 338 transitions, 5156 flow [2024-06-14 13:23:48,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 338 transitions, 5111 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:23:48,153 INFO L231 Difference]: Finished difference. Result has 247 places, 312 transitions, 4358 flow [2024-06-14 13:23:48,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4358, PETRI_PLACES=247, PETRI_TRANSITIONS=312} [2024-06-14 13:23:48,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 13:23:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 312 transitions, 4358 flow [2024-06-14 13:23:48,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:48,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:48,157 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 13:23:48,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:23:48,157 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash -203754888, now seen corresponding path program 6 times [2024-06-14 13:23:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228739763] [2024-06-14 13:23:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:50,884 INFO 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 13:23:50,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:50,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228739763] [2024-06-14 13:23:50,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228739763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:50,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170670836] [2024-06-14 13:23:50,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:50,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:50,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:50,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 312 transitions, 4358 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:50,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:50,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:50,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:52,142 INFO L124 PetriNetUnfolderBase]: 2547/3988 cut-off events. [2024-06-14 13:23:52,143 INFO L125 PetriNetUnfolderBase]: For 271034/271034 co-relation queries the response was YES. [2024-06-14 13:23:52,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35937 conditions, 3988 events. 2547/3988 cut-off events. For 271034/271034 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21853 event pairs, 529 based on Foata normal form. 8/3995 useless extension candidates. Maximal degree in co-relation 35816. Up to 3743 conditions per place. [2024-06-14 13:23:52,187 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 37 changer transitions 0/342 dead transitions. [2024-06-14 13:23:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 342 transitions, 5365 flow [2024-06-14 13:23:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:23:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:23:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-14 13:23:52,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-14 13:23:52,188 INFO L175 Difference]: Start difference. First operand has 247 places, 312 transitions, 4358 flow. Second operand 10 states and 146 transitions. [2024-06-14 13:23:52,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 342 transitions, 5365 flow [2024-06-14 13:23:52,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 342 transitions, 5295 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:23:52,604 INFO L231 Difference]: Finished difference. Result has 250 places, 315 transitions, 4427 flow [2024-06-14 13:23:52,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4427, PETRI_PLACES=250, PETRI_TRANSITIONS=315} [2024-06-14 13:23:52,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:23:52,604 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 315 transitions, 4427 flow [2024-06-14 13:23:52,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:52,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:52,605 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 13:23:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:23:52,605 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:52,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash 636094690, now seen corresponding path program 7 times [2024-06-14 13:23:52,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:52,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786751781] [2024-06-14 13:23:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:55,678 INFO 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 13:23:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786751781] [2024-06-14 13:23:55,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786751781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:55,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111519411] [2024-06-14 13:23:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:55,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:23:55,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 315 transitions, 4427 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:55,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:55,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:23:55,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:57,068 INFO L124 PetriNetUnfolderBase]: 2593/4058 cut-off events. [2024-06-14 13:23:57,069 INFO L125 PetriNetUnfolderBase]: For 284554/284554 co-relation queries the response was YES. [2024-06-14 13:23:57,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 4058 events. 2593/4058 cut-off events. For 284554/284554 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22371 event pairs, 547 based on Foata normal form. 10/4067 useless extension candidates. Maximal degree in co-relation 36548. Up to 3876 conditions per place. [2024-06-14 13:23:57,123 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 299 selfloop transitions, 38 changer transitions 0/341 dead transitions. [2024-06-14 13:23:57,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 341 transitions, 5296 flow [2024-06-14 13:23:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:23:57,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 13:23:57,125 INFO L175 Difference]: Start difference. First operand has 250 places, 315 transitions, 4427 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:23:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 341 transitions, 5296 flow [2024-06-14 13:23:57,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 341 transitions, 5233 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:57,689 INFO L231 Difference]: Finished difference. Result has 253 places, 319 transitions, 4509 flow [2024-06-14 13:23:57,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4509, PETRI_PLACES=253, PETRI_TRANSITIONS=319} [2024-06-14 13:23:57,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-14 13:23:57,690 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 319 transitions, 4509 flow [2024-06-14 13:23:57,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:57,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:57,690 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 13:23:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:23:57,690 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:57,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 982740176, now seen corresponding path program 1 times [2024-06-14 13:23:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240248446] [2024-06-14 13:23:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:00,922 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 13:24:00,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240248446] [2024-06-14 13:24:00,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240248446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:00,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:00,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:00,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591445986] [2024-06-14 13:24:00,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:00,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:00,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:00,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:00,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:00,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:00,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 319 transitions, 4509 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:00,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:00,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:02,234 INFO L124 PetriNetUnfolderBase]: 2601/4070 cut-off events. [2024-06-14 13:24:02,234 INFO L125 PetriNetUnfolderBase]: For 281559/281559 co-relation queries the response was YES. [2024-06-14 13:24:02,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36953 conditions, 4070 events. 2601/4070 cut-off events. For 281559/281559 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22402 event pairs, 549 based on Foata normal form. 2/4071 useless extension candidates. Maximal degree in co-relation 36828. Up to 3951 conditions per place. [2024-06-14 13:24:02,279 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 28 changer transitions 0/337 dead transitions. [2024-06-14 13:24:02,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 337 transitions, 5270 flow [2024-06-14 13:24:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 13:24:02,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-14 13:24:02,280 INFO L175 Difference]: Start difference. First operand has 253 places, 319 transitions, 4509 flow. Second operand 8 states and 117 transitions. [2024-06-14 13:24:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 337 transitions, 5270 flow [2024-06-14 13:24:02,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 337 transitions, 5210 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:02,741 INFO L231 Difference]: Finished difference. Result has 256 places, 321 transitions, 4563 flow [2024-06-14 13:24:02,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4563, PETRI_PLACES=256, PETRI_TRANSITIONS=321} [2024-06-14 13:24:02,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-14 13:24:02,743 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 321 transitions, 4563 flow [2024-06-14 13:24:02,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:02,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:02,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:02,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:24:02,743 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:02,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash 636238840, now seen corresponding path program 8 times [2024-06-14 13:24:02,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:02,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697316739] [2024-06-14 13:24:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:02,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:05,447 INFO 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 13:24:05,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:05,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697316739] [2024-06-14 13:24:05,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697316739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:05,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:05,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436071211] [2024-06-14 13:24:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:05,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:05,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 321 transitions, 4563 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:06,814 INFO L124 PetriNetUnfolderBase]: 2637/4126 cut-off events. [2024-06-14 13:24:06,815 INFO L125 PetriNetUnfolderBase]: For 301665/301665 co-relation queries the response was YES. [2024-06-14 13:24:06,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37506 conditions, 4126 events. 2637/4126 cut-off events. For 301665/301665 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22796 event pairs, 555 based on Foata normal form. 10/4135 useless extension candidates. Maximal degree in co-relation 37380. Up to 3963 conditions per place. [2024-06-14 13:24:06,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2024-06-14 13:24:06,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 344 transitions, 5389 flow [2024-06-14 13:24:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:24:06,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-14 13:24:06,868 INFO L175 Difference]: Start difference. First operand has 256 places, 321 transitions, 4563 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:24:06,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 344 transitions, 5389 flow [2024-06-14 13:24:07,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 344 transitions, 5294 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:07,355 INFO L231 Difference]: Finished difference. Result has 259 places, 322 transitions, 4555 flow [2024-06-14 13:24:07,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4468, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4555, PETRI_PLACES=259, PETRI_TRANSITIONS=322} [2024-06-14 13:24:07,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:24:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 322 transitions, 4555 flow [2024-06-14 13:24:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:07,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:07,357 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 13:24:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:24:07,357 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:07,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1182041966, now seen corresponding path program 2 times [2024-06-14 13:24:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979680726] [2024-06-14 13:24:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:07,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:10,333 INFO 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 13:24:10,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:10,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979680726] [2024-06-14 13:24:10,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979680726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:10,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:10,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655747845] [2024-06-14 13:24:10,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:10,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:10,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:10,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 322 transitions, 4555 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:10,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:10,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:10,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:11,887 INFO L124 PetriNetUnfolderBase]: 2645/4138 cut-off events. [2024-06-14 13:24:11,888 INFO L125 PetriNetUnfolderBase]: For 298570/298570 co-relation queries the response was YES. [2024-06-14 13:24:11,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37761 conditions, 4138 events. 2645/4138 cut-off events. For 298570/298570 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22866 event pairs, 561 based on Foata normal form. 2/4139 useless extension candidates. Maximal degree in co-relation 37634. Up to 4034 conditions per place. [2024-06-14 13:24:11,940 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 17 changer transitions 0/339 dead transitions. [2024-06-14 13:24:11,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 339 transitions, 5319 flow [2024-06-14 13:24:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 13:24:11,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-14 13:24:11,942 INFO L175 Difference]: Start difference. First operand has 259 places, 322 transitions, 4555 flow. Second operand 8 states and 113 transitions. [2024-06-14 13:24:11,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 339 transitions, 5319 flow [2024-06-14 13:24:12,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 339 transitions, 5235 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:24:12,418 INFO L231 Difference]: Finished difference. Result has 259 places, 324 transitions, 4567 flow [2024-06-14 13:24:12,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4567, PETRI_PLACES=259, PETRI_TRANSITIONS=324} [2024-06-14 13:24:12,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:24:12,434 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 324 transitions, 4567 flow [2024-06-14 13:24:12,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:12,434 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 13:24:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:24:12,434 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:12,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1182036014, now seen corresponding path program 9 times [2024-06-14 13:24:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:12,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937338759] [2024-06-14 13:24:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:14,924 INFO 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 13:24:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937338759] [2024-06-14 13:24:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937338759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101593791] [2024-06-14 13:24:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:14,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:14,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 324 transitions, 4567 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:14,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:14,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:14,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:16,505 INFO L124 PetriNetUnfolderBase]: 2622/4107 cut-off events. [2024-06-14 13:24:16,505 INFO L125 PetriNetUnfolderBase]: For 301846/301846 co-relation queries the response was YES. [2024-06-14 13:24:16,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37006 conditions, 4107 events. 2622/4107 cut-off events. For 301846/301846 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22700 event pairs, 544 based on Foata normal form. 10/4116 useless extension candidates. Maximal degree in co-relation 36878. Up to 3949 conditions per place. [2024-06-14 13:24:16,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 24 changer transitions 0/346 dead transitions. [2024-06-14 13:24:16,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 346 transitions, 5394 flow [2024-06-14 13:24:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-14 13:24:16,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-14 13:24:16,553 INFO L175 Difference]: Start difference. First operand has 259 places, 324 transitions, 4567 flow. Second operand 9 states and 129 transitions. [2024-06-14 13:24:16,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 346 transitions, 5394 flow [2024-06-14 13:24:17,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 346 transitions, 5296 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:17,061 INFO L231 Difference]: Finished difference. Result has 263 places, 325 transitions, 4546 flow [2024-06-14 13:24:17,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4546, PETRI_PLACES=263, PETRI_TRANSITIONS=325} [2024-06-14 13:24:17,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 13:24:17,062 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 325 transitions, 4546 flow [2024-06-14 13:24:17,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:17,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:17,062 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 13:24:17,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:24:17,062 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:17,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 842898232, now seen corresponding path program 3 times [2024-06-14 13:24:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354192415] [2024-06-14 13:24:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:19,999 INFO 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 13:24:20,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:20,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354192415] [2024-06-14 13:24:20,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354192415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:20,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:20,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893073289] [2024-06-14 13:24:20,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:20,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:20,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:20,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 325 transitions, 4546 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:20,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:20,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:21,711 INFO L124 PetriNetUnfolderBase]: 2617/4100 cut-off events. [2024-06-14 13:24:21,711 INFO L125 PetriNetUnfolderBase]: For 290628/290628 co-relation queries the response was YES. [2024-06-14 13:24:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36795 conditions, 4100 events. 2617/4100 cut-off events. For 290628/290628 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22627 event pairs, 541 based on Foata normal form. 2/4101 useless extension candidates. Maximal degree in co-relation 36666. Up to 3982 conditions per place. [2024-06-14 13:24:21,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 314 selfloop transitions, 24 changer transitions 0/342 dead transitions. [2024-06-14 13:24:21,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 342 transitions, 5320 flow [2024-06-14 13:24:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-14 13:24:21,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-14 13:24:21,758 INFO L175 Difference]: Start difference. First operand has 263 places, 325 transitions, 4546 flow. Second operand 8 states and 114 transitions. [2024-06-14 13:24:21,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 342 transitions, 5320 flow [2024-06-14 13:24:22,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 342 transitions, 5271 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:22,215 INFO L231 Difference]: Finished difference. Result has 264 places, 327 transitions, 4614 flow [2024-06-14 13:24:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4614, PETRI_PLACES=264, PETRI_TRANSITIONS=327} [2024-06-14 13:24:22,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 13:24:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 327 transitions, 4614 flow [2024-06-14 13:24:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:22,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:22,216 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 13:24:22,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:24:22,217 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:22,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash 843165142, now seen corresponding path program 4 times [2024-06-14 13:24:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898965720] [2024-06-14 13:24:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:25,066 INFO 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 13:24:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898965720] [2024-06-14 13:24:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898965720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:25,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889547654] [2024-06-14 13:24:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:25,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:25,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 327 transitions, 4614 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:25,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:25,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:25,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:26,544 INFO L124 PetriNetUnfolderBase]: 2612/4093 cut-off events. [2024-06-14 13:24:26,544 INFO L125 PetriNetUnfolderBase]: For 294392/294392 co-relation queries the response was YES. [2024-06-14 13:24:26,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36758 conditions, 4093 events. 2612/4093 cut-off events. For 294392/294392 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22596 event pairs, 536 based on Foata normal form. 2/4094 useless extension candidates. Maximal degree in co-relation 36628. Up to 3982 conditions per place. [2024-06-14 13:24:26,588 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 323 selfloop transitions, 17 changer transitions 0/344 dead transitions. [2024-06-14 13:24:26,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 344 transitions, 5381 flow [2024-06-14 13:24:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 13:24:26,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-14 13:24:26,590 INFO L175 Difference]: Start difference. First operand has 264 places, 327 transitions, 4614 flow. Second operand 8 states and 113 transitions. [2024-06-14 13:24:26,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 344 transitions, 5381 flow [2024-06-14 13:24:27,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 344 transitions, 5285 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:27,082 INFO L231 Difference]: Finished difference. Result has 266 places, 329 transitions, 4610 flow [2024-06-14 13:24:27,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4610, PETRI_PLACES=266, PETRI_TRANSITIONS=329} [2024-06-14 13:24:27,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:24:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 329 transitions, 4610 flow [2024-06-14 13:24:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:27,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:27,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:24:27,084 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:27,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1410758951, now seen corresponding path program 1 times [2024-06-14 13:24:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306665920] [2024-06-14 13:24:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306665920] [2024-06-14 13:24:30,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306665920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:30,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:30,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:30,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72521982] [2024-06-14 13:24:30,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:30,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:30,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:30,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:30,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 329 transitions, 4610 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:31,937 INFO L124 PetriNetUnfolderBase]: 2640/4136 cut-off events. [2024-06-14 13:24:31,938 INFO L125 PetriNetUnfolderBase]: For 307213/307216 co-relation queries the response was YES. [2024-06-14 13:24:31,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37010 conditions, 4136 events. 2640/4136 cut-off events. For 307213/307216 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22766 event pairs, 429 based on Foata normal form. 8/4141 useless extension candidates. Maximal degree in co-relation 36879. Up to 3767 conditions per place. [2024-06-14 13:24:31,986 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 321 selfloop transitions, 35 changer transitions 0/360 dead transitions. [2024-06-14 13:24:31,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 360 transitions, 5719 flow [2024-06-14 13:24:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:24:31,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:24:31,988 INFO L175 Difference]: Start difference. First operand has 266 places, 329 transitions, 4610 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:24:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 360 transitions, 5719 flow [2024-06-14 13:24:32,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 360 transitions, 5640 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:32,461 INFO L231 Difference]: Finished difference. Result has 268 places, 330 transitions, 4630 flow [2024-06-14 13:24:32,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4630, PETRI_PLACES=268, PETRI_TRANSITIONS=330} [2024-06-14 13:24:32,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:24:32,462 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 330 transitions, 4630 flow [2024-06-14 13:24:32,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:32,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:32,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:32,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:24:32,463 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:32,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1406364983, now seen corresponding path program 2 times [2024-06-14 13:24:32,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:32,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980066041] [2024-06-14 13:24:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:35,955 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 13:24:35,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:35,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980066041] [2024-06-14 13:24:35,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980066041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:35,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:35,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:24:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50224676] [2024-06-14 13:24:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:24:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:24:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:24:35,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:35,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 330 transitions, 4630 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:35,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:35,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:35,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:37,702 INFO L124 PetriNetUnfolderBase]: 2622/4108 cut-off events. [2024-06-14 13:24:37,703 INFO L125 PetriNetUnfolderBase]: For 297983/297986 co-relation queries the response was YES. [2024-06-14 13:24:37,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36465 conditions, 4108 events. 2622/4108 cut-off events. For 297983/297986 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22609 event pairs, 514 based on Foata normal form. 8/4113 useless extension candidates. Maximal degree in co-relation 36333. Up to 3845 conditions per place. [2024-06-14 13:24:37,757 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 315 selfloop transitions, 35 changer transitions 0/354 dead transitions. [2024-06-14 13:24:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 354 transitions, 5564 flow [2024-06-14 13:24:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:24:37,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:24:37,759 INFO L175 Difference]: Start difference. First operand has 268 places, 330 transitions, 4630 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:24:37,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 354 transitions, 5564 flow [2024-06-14 13:24:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 354 transitions, 5490 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:38,537 INFO L231 Difference]: Finished difference. Result has 271 places, 330 transitions, 4630 flow [2024-06-14 13:24:38,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4630, PETRI_PLACES=271, PETRI_TRANSITIONS=330} [2024-06-14 13:24:38,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:24:38,538 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 330 transitions, 4630 flow [2024-06-14 13:24:38,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:24:38,538 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:38,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1040773644, now seen corresponding path program 1 times [2024-06-14 13:24:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475747801] [2024-06-14 13:24:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:42,315 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 13:24:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:42,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475747801] [2024-06-14 13:24:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475747801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:24:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384445203] [2024-06-14 13:24:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:24:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:24:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:24:42,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:42,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 330 transitions, 4630 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:42,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:42,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:42,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:43,729 INFO L124 PetriNetUnfolderBase]: 2640/4136 cut-off events. [2024-06-14 13:24:43,729 INFO L125 PetriNetUnfolderBase]: For 295055/295058 co-relation queries the response was YES. [2024-06-14 13:24:43,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36638 conditions, 4136 events. 2640/4136 cut-off events. For 295055/295058 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22841 event pairs, 548 based on Foata normal form. 1/4135 useless extension candidates. Maximal degree in co-relation 36505. Up to 3852 conditions per place. [2024-06-14 13:24:43,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 64 changer transitions 0/356 dead transitions. [2024-06-14 13:24:43,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 356 transitions, 5512 flow [2024-06-14 13:24:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:24:43,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:24:43,784 INFO L175 Difference]: Start difference. First operand has 271 places, 330 transitions, 4630 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:24:43,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 356 transitions, 5512 flow [2024-06-14 13:24:44,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 356 transitions, 5418 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:44,298 INFO L231 Difference]: Finished difference. Result has 273 places, 336 transitions, 4852 flow [2024-06-14 13:24:44,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4852, PETRI_PLACES=273, PETRI_TRANSITIONS=336} [2024-06-14 13:24:44,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 13:24:44,298 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 336 transitions, 4852 flow [2024-06-14 13:24:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:44,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:44,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:24:44,299 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:44,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:44,299 INFO L85 PathProgramCache]: Analyzing trace with hash -817885474, now seen corresponding path program 2 times [2024-06-14 13:24:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:44,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727733397] [2024-06-14 13:24:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:48,543 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 13:24:48,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727733397] [2024-06-14 13:24:48,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727733397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:48,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:48,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:24:48,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031167043] [2024-06-14 13:24:48,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:24:48,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:48,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:24:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:24:48,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:48,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 336 transitions, 4852 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:48,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:48,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:48,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:50,253 INFO L124 PetriNetUnfolderBase]: 2650/4152 cut-off events. [2024-06-14 13:24:50,253 INFO L125 PetriNetUnfolderBase]: For 305305/305308 co-relation queries the response was YES. [2024-06-14 13:24:50,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37329 conditions, 4152 events. 2650/4152 cut-off events. For 305305/305308 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22973 event pairs, 546 based on Foata normal form. 1/4151 useless extension candidates. Maximal degree in co-relation 37194. Up to 3943 conditions per place. [2024-06-14 13:24:50,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 54 changer transitions 0/365 dead transitions. [2024-06-14 13:24:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 365 transitions, 5843 flow [2024-06-14 13:24:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:24:50,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:24:50,331 INFO L175 Difference]: Start difference. First operand has 273 places, 336 transitions, 4852 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:24:50,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 365 transitions, 5843 flow [2024-06-14 13:24:50,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 365 transitions, 5684 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:50,952 INFO L231 Difference]: Finished difference. Result has 278 places, 348 transitions, 5091 flow [2024-06-14 13:24:50,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4697, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5091, PETRI_PLACES=278, PETRI_TRANSITIONS=348} [2024-06-14 13:24:50,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:24:50,953 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 348 transitions, 5091 flow [2024-06-14 13:24:50,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:50,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:50,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:24:50,954 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:50,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash -817885319, now seen corresponding path program 1 times [2024-06-14 13:24:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:50,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588711473] [2024-06-14 13:24:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588711473] [2024-06-14 13:24:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588711473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:24:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513295853] [2024-06-14 13:24:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:24:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:24:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:24:54,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:54,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 348 transitions, 5091 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:54,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:54,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:54,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:56,171 INFO L124 PetriNetUnfolderBase]: 2660/4170 cut-off events. [2024-06-14 13:24:56,172 INFO L125 PetriNetUnfolderBase]: For 312657/312660 co-relation queries the response was YES. [2024-06-14 13:24:56,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37912 conditions, 4170 events. 2660/4170 cut-off events. For 312657/312660 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23094 event pairs, 542 based on Foata normal form. 2/4170 useless extension candidates. Maximal degree in co-relation 37775. Up to 3963 conditions per place. [2024-06-14 13:24:56,228 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 44 changer transitions 0/369 dead transitions. [2024-06-14 13:24:56,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 369 transitions, 6013 flow [2024-06-14 13:24:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:24:56,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:24:56,230 INFO L175 Difference]: Start difference. First operand has 278 places, 348 transitions, 5091 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:24:56,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 369 transitions, 6013 flow [2024-06-14 13:24:56,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 369 transitions, 5836 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:56,874 INFO L231 Difference]: Finished difference. Result has 281 places, 351 transitions, 5143 flow [2024-06-14 13:24:56,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=281, PETRI_TRANSITIONS=351} [2024-06-14 13:24:56,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 13:24:56,876 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 351 transitions, 5143 flow [2024-06-14 13:24:56,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:56,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:56,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:24:56,877 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:56,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1788854214, now seen corresponding path program 3 times [2024-06-14 13:24:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:56,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073684178] [2024-06-14 13:24:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:59,930 INFO 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 13:24:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:59,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073684178] [2024-06-14 13:24:59,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073684178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:59,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:59,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:59,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474732739] [2024-06-14 13:24:59,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:59,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:59,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:59,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:24:59,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 351 transitions, 5143 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:59,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:59,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:24:59,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:01,500 INFO L124 PetriNetUnfolderBase]: 2681/4195 cut-off events. [2024-06-14 13:25:01,501 INFO L125 PetriNetUnfolderBase]: For 327698/327701 co-relation queries the response was YES. [2024-06-14 13:25:01,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38865 conditions, 4195 events. 2681/4195 cut-off events. For 327698/327701 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23184 event pairs, 553 based on Foata normal form. 1/4193 useless extension candidates. Maximal degree in co-relation 38727. Up to 3820 conditions per place. [2024-06-14 13:25:01,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 91 changer transitions 0/387 dead transitions. [2024-06-14 13:25:01,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 387 transitions, 6563 flow [2024-06-14 13:25:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:25:01,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:25:01,694 INFO L175 Difference]: Start difference. First operand has 281 places, 351 transitions, 5143 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:25:01,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 387 transitions, 6563 flow [2024-06-14 13:25:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 387 transitions, 6421 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:02,251 INFO L231 Difference]: Finished difference. Result has 285 places, 360 transitions, 5519 flow [2024-06-14 13:25:02,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5519, PETRI_PLACES=285, PETRI_TRANSITIONS=360} [2024-06-14 13:25:02,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-14 13:25:02,252 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 360 transitions, 5519 flow [2024-06-14 13:25:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:02,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:02,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:25:02,252 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:02,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -272001771, now seen corresponding path program 1 times [2024-06-14 13:25:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:02,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346627181] [2024-06-14 13:25:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:04,806 INFO 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 13:25:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346627181] [2024-06-14 13:25:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346627181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:04,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:04,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551596805] [2024-06-14 13:25:04,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:04,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:04,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 360 transitions, 5519 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:04,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:04,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:04,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:06,547 INFO L124 PetriNetUnfolderBase]: 2730/4272 cut-off events. [2024-06-14 13:25:06,547 INFO L125 PetriNetUnfolderBase]: For 347379/347384 co-relation queries the response was YES. [2024-06-14 13:25:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40205 conditions, 4272 events. 2730/4272 cut-off events. For 347379/347384 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23655 event pairs, 541 based on Foata normal form. 6/4276 useless extension candidates. Maximal degree in co-relation 40066. Up to 3989 conditions per place. [2024-06-14 13:25:06,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 84 changer transitions 0/416 dead transitions. [2024-06-14 13:25:06,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 416 transitions, 7119 flow [2024-06-14 13:25:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:25:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:25:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:25:06,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:25:06,600 INFO L175 Difference]: Start difference. First operand has 285 places, 360 transitions, 5519 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:25:06,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 416 transitions, 7119 flow [2024-06-14 13:25:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 416 transitions, 6925 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:07,313 INFO L231 Difference]: Finished difference. Result has 295 places, 389 transitions, 6183 flow [2024-06-14 13:25:07,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6183, PETRI_PLACES=295, PETRI_TRANSITIONS=389} [2024-06-14 13:25:07,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 13:25:07,314 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 389 transitions, 6183 flow [2024-06-14 13:25:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:07,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:07,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:07,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:25:07,314 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:07,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:07,315 INFO L85 PathProgramCache]: Analyzing trace with hash -272002112, now seen corresponding path program 4 times [2024-06-14 13:25:07,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:07,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990942723] [2024-06-14 13:25:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:07,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:10,235 INFO 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 13:25:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990942723] [2024-06-14 13:25:10,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990942723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:10,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:10,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:10,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84694743] [2024-06-14 13:25:10,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:10,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:10,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 389 transitions, 6183 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:10,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:10,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:10,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:11,885 INFO L124 PetriNetUnfolderBase]: 2743/4282 cut-off events. [2024-06-14 13:25:11,885 INFO L125 PetriNetUnfolderBase]: For 355210/355213 co-relation queries the response was YES. [2024-06-14 13:25:11,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41070 conditions, 4282 events. 2743/4282 cut-off events. For 355210/355213 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23649 event pairs, 559 based on Foata normal form. 1/4280 useless extension candidates. Maximal degree in co-relation 40925. Up to 3885 conditions per place. [2024-06-14 13:25:11,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 106 changer transitions 0/418 dead transitions. [2024-06-14 13:25:11,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 418 transitions, 7543 flow [2024-06-14 13:25:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:25:11,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:25:11,946 INFO L175 Difference]: Start difference. First operand has 295 places, 389 transitions, 6183 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:25:11,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 418 transitions, 7543 flow [2024-06-14 13:25:12,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 418 transitions, 7351 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:12,821 INFO L231 Difference]: Finished difference. Result has 300 places, 395 transitions, 6418 flow [2024-06-14 13:25:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=300, PETRI_TRANSITIONS=395} [2024-06-14 13:25:12,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-14 13:25:12,821 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 395 transitions, 6418 flow [2024-06-14 13:25:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:12,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:12,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:25:12,822 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:12,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1712154290, now seen corresponding path program 5 times [2024-06-14 13:25:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:12,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120826219] [2024-06-14 13:25:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:17,254 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 13:25:17,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:17,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120826219] [2024-06-14 13:25:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120826219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:17,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192331040] [2024-06-14 13:25:17,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:17,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:17,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:17,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 395 transitions, 6418 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:17,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:17,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:18,987 INFO L124 PetriNetUnfolderBase]: 2748/4299 cut-off events. [2024-06-14 13:25:18,987 INFO L125 PetriNetUnfolderBase]: For 356393/356398 co-relation queries the response was YES. [2024-06-14 13:25:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41238 conditions, 4299 events. 2748/4299 cut-off events. For 356393/356398 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23901 event pairs, 555 based on Foata normal form. 5/4302 useless extension candidates. Maximal degree in co-relation 41092. Up to 4098 conditions per place. [2024-06-14 13:25:19,044 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-06-14 13:25:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 414 transitions, 7388 flow [2024-06-14 13:25:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:25:19,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 13:25:19,046 INFO L175 Difference]: Start difference. First operand has 300 places, 395 transitions, 6418 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:25:19,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 414 transitions, 7388 flow [2024-06-14 13:25:20,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 414 transitions, 7115 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:20,047 INFO L231 Difference]: Finished difference. Result has 304 places, 398 transitions, 6355 flow [2024-06-14 13:25:20,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6355, PETRI_PLACES=304, PETRI_TRANSITIONS=398} [2024-06-14 13:25:20,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 13:25:20,048 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 398 transitions, 6355 flow [2024-06-14 13:25:20,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:20,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:20,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:20,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:25:20,049 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:20,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1712154135, now seen corresponding path program 2 times [2024-06-14 13:25:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:20,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36745085] [2024-06-14 13:25:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:24,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36745085] [2024-06-14 13:25:24,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36745085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:24,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550621044] [2024-06-14 13:25:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:24,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:24,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:24,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 398 transitions, 6355 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:24,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:24,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:26,368 INFO L124 PetriNetUnfolderBase]: 2779/4348 cut-off events. [2024-06-14 13:25:26,368 INFO L125 PetriNetUnfolderBase]: For 377869/377874 co-relation queries the response was YES. [2024-06-14 13:25:26,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42197 conditions, 4348 events. 2779/4348 cut-off events. For 377869/377874 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24183 event pairs, 543 based on Foata normal form. 6/4352 useless extension candidates. Maximal degree in co-relation 42050. Up to 4144 conditions per place. [2024-06-14 13:25:26,453 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 38 changer transitions 0/427 dead transitions. [2024-06-14 13:25:26,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 427 transitions, 7690 flow [2024-06-14 13:25:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:25:26,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:25:26,455 INFO L175 Difference]: Start difference. First operand has 304 places, 398 transitions, 6355 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:25:26,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 427 transitions, 7690 flow [2024-06-14 13:25:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 427 transitions, 7497 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:25:27,527 INFO L231 Difference]: Finished difference. Result has 307 places, 407 transitions, 6539 flow [2024-06-14 13:25:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6167, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6539, PETRI_PLACES=307, PETRI_TRANSITIONS=407} [2024-06-14 13:25:27,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 13:25:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 407 transitions, 6539 flow [2024-06-14 13:25:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:27,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:27,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:27,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:25:27,528 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:27,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1712148710, now seen corresponding path program 6 times [2024-06-14 13:25:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:27,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655106299] [2024-06-14 13:25:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:32,019 INFO 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 13:25:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:32,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655106299] [2024-06-14 13:25:32,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655106299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617188639] [2024-06-14 13:25:32,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:32,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:32,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:32,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:32,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 407 transitions, 6539 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:32,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:32,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:32,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:33,475 INFO L124 PetriNetUnfolderBase]: 2784/4355 cut-off events. [2024-06-14 13:25:33,475 INFO L125 PetriNetUnfolderBase]: For 389070/389075 co-relation queries the response was YES. [2024-06-14 13:25:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42670 conditions, 4355 events. 2784/4355 cut-off events. For 389070/389075 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24255 event pairs, 565 based on Foata normal form. 5/4358 useless extension candidates. Maximal degree in co-relation 42521. Up to 4122 conditions per place. [2024-06-14 13:25:33,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 57 changer transitions 0/426 dead transitions. [2024-06-14 13:25:33,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 426 transitions, 7541 flow [2024-06-14 13:25:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:25:33,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:25:33,540 INFO L175 Difference]: Start difference. First operand has 307 places, 407 transitions, 6539 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:25:33,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 426 transitions, 7541 flow [2024-06-14 13:25:34,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 426 transitions, 7368 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:34,449 INFO L231 Difference]: Finished difference. Result has 311 places, 410 transitions, 6613 flow [2024-06-14 13:25:34,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6366, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6613, PETRI_PLACES=311, PETRI_TRANSITIONS=410} [2024-06-14 13:25:34,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 13:25:34,450 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 410 transitions, 6613 flow [2024-06-14 13:25:34,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:34,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:34,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:34,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:25:34,450 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:34,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1712148369, now seen corresponding path program 2 times [2024-06-14 13:25:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:34,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290470793] [2024-06-14 13:25:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:34,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290470793] [2024-06-14 13:25:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290470793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:38,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:38,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723513241] [2024-06-14 13:25:38,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:38,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:38,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:38,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 410 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:38,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:38,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:40,024 INFO L124 PetriNetUnfolderBase]: 2856/4455 cut-off events. [2024-06-14 13:25:40,024 INFO L125 PetriNetUnfolderBase]: For 422438/422443 co-relation queries the response was YES. [2024-06-14 13:25:40,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44556 conditions, 4455 events. 2856/4455 cut-off events. For 422438/422443 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24765 event pairs, 545 based on Foata normal form. 8/4461 useless extension candidates. Maximal degree in co-relation 44405. Up to 4214 conditions per place. [2024-06-14 13:25:40,081 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 391 selfloop transitions, 52 changer transitions 0/447 dead transitions. [2024-06-14 13:25:40,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 8125 flow [2024-06-14 13:25:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:25:40,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 13:25:40,083 INFO L175 Difference]: Start difference. First operand has 311 places, 410 transitions, 6613 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:25:40,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 8125 flow [2024-06-14 13:25:40,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 447 transitions, 7891 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 13:25:41,004 INFO L231 Difference]: Finished difference. Result has 314 places, 427 transitions, 6944 flow [2024-06-14 13:25:41,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6944, PETRI_PLACES=314, PETRI_TRANSITIONS=427} [2024-06-14 13:25:41,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 13:25:41,005 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 427 transitions, 6944 flow [2024-06-14 13:25:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:41,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:41,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:25:41,006 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:41,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1712143719, now seen corresponding path program 3 times [2024-06-14 13:25:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:41,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253224332] [2024-06-14 13:25:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253224332] [2024-06-14 13:25:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253224332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:44,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:44,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726854971] [2024-06-14 13:25:44,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:44,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:44,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 427 transitions, 6944 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:44,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:44,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:45,625 INFO L124 PetriNetUnfolderBase]: 2844/4439 cut-off events. [2024-06-14 13:25:45,626 INFO L125 PetriNetUnfolderBase]: For 427831/427836 co-relation queries the response was YES. [2024-06-14 13:25:45,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44644 conditions, 4439 events. 2844/4439 cut-off events. For 427831/427836 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24673 event pairs, 547 based on Foata normal form. 8/4445 useless extension candidates. Maximal degree in co-relation 44491. Up to 4231 conditions per place. [2024-06-14 13:25:45,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 39 changer transitions 0/445 dead transitions. [2024-06-14 13:25:45,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 445 transitions, 7888 flow [2024-06-14 13:25:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:25:45,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:25:45,692 INFO L175 Difference]: Start difference. First operand has 314 places, 427 transitions, 6944 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:25:45,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 445 transitions, 7888 flow [2024-06-14 13:25:46,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 7579 flow, removed 137 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:46,818 INFO L231 Difference]: Finished difference. Result has 318 places, 427 transitions, 6724 flow [2024-06-14 13:25:46,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6724, PETRI_PLACES=318, PETRI_TRANSITIONS=427} [2024-06-14 13:25:46,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-14 13:25:46,819 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 427 transitions, 6724 flow [2024-06-14 13:25:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:46,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:25:46,820 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:46,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1712143905, now seen corresponding path program 3 times [2024-06-14 13:25:46,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543870427] [2024-06-14 13:25:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:50,170 INFO 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 13:25:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:50,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543870427] [2024-06-14 13:25:50,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543870427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:50,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049705760] [2024-06-14 13:25:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:50,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:50,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 427 transitions, 6724 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:50,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:50,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:50,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:51,951 INFO L124 PetriNetUnfolderBase]: 2838/4431 cut-off events. [2024-06-14 13:25:51,951 INFO L125 PetriNetUnfolderBase]: For 419852/419857 co-relation queries the response was YES. [2024-06-14 13:25:51,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44000 conditions, 4431 events. 2838/4431 cut-off events. For 419852/419857 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24635 event pairs, 545 based on Foata normal form. 6/4435 useless extension candidates. Maximal degree in co-relation 43845. Up to 4230 conditions per place. [2024-06-14 13:25:52,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 40 changer transitions 0/445 dead transitions. [2024-06-14 13:25:52,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 445 transitions, 7668 flow [2024-06-14 13:25:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:25:52,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:25:52,016 INFO L175 Difference]: Start difference. First operand has 318 places, 427 transitions, 6724 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:25:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 445 transitions, 7668 flow [2024-06-14 13:25:53,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 445 transitions, 7507 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:53,197 INFO L231 Difference]: Finished difference. Result has 321 places, 427 transitions, 6649 flow [2024-06-14 13:25:53,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6563, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6649, PETRI_PLACES=321, PETRI_TRANSITIONS=427} [2024-06-14 13:25:53,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 13:25:53,198 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 427 transitions, 6649 flow [2024-06-14 13:25:53,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:53,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:53,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:53,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:25:53,199 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:53,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1431213415, now seen corresponding path program 4 times [2024-06-14 13:25:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:53,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832328705] [2024-06-14 13:25:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:55,767 INFO 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 13:25:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832328705] [2024-06-14 13:25:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832328705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:55,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064602377] [2024-06-14 13:25:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:55,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:25:55,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 427 transitions, 6649 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:55,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:55,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:25:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:57,619 INFO L124 PetriNetUnfolderBase]: 2878/4483 cut-off events. [2024-06-14 13:25:57,619 INFO L125 PetriNetUnfolderBase]: For 435001/435004 co-relation queries the response was YES. [2024-06-14 13:25:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44574 conditions, 4483 events. 2878/4483 cut-off events. For 435001/435004 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 24918 event pairs, 553 based on Foata normal form. 4/4484 useless extension candidates. Maximal degree in co-relation 44418. Up to 4219 conditions per place. [2024-06-14 13:25:57,684 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 373 selfloop transitions, 89 changer transitions 0/466 dead transitions. [2024-06-14 13:25:57,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 466 transitions, 8037 flow [2024-06-14 13:25:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-14 13:25:57,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-14 13:25:57,685 INFO L175 Difference]: Start difference. First operand has 321 places, 427 transitions, 6649 flow. Second operand 10 states and 152 transitions. [2024-06-14 13:25:57,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 466 transitions, 8037 flow [2024-06-14 13:25:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 466 transitions, 7971 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:58,921 INFO L231 Difference]: Finished difference. Result has 329 places, 448 transitions, 7288 flow [2024-06-14 13:25:58,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7288, PETRI_PLACES=329, PETRI_TRANSITIONS=448} [2024-06-14 13:25:58,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-14 13:25:58,922 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 448 transitions, 7288 flow [2024-06-14 13:25:58,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:58,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:58,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:25:58,922 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:58,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1431218406, now seen corresponding path program 7 times [2024-06-14 13:25:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33694769] [2024-06-14 13:25:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:02,292 INFO 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 13:26:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33694769] [2024-06-14 13:26:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33694769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:02,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757630831] [2024-06-14 13:26:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:02,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:02,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:02,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 448 transitions, 7288 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:02,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:02,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:02,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:04,095 INFO L124 PetriNetUnfolderBase]: 2875/4479 cut-off events. [2024-06-14 13:26:04,096 INFO L125 PetriNetUnfolderBase]: For 439934/439937 co-relation queries the response was YES. [2024-06-14 13:26:04,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45268 conditions, 4479 events. 2875/4479 cut-off events. For 439934/439937 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 24912 event pairs, 549 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 45108. Up to 4272 conditions per place. [2024-06-14 13:26:04,180 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 55 changer transitions 0/463 dead transitions. [2024-06-14 13:26:04,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 463 transitions, 8392 flow [2024-06-14 13:26:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:26:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:26:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:26:04,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-14 13:26:04,182 INFO L175 Difference]: Start difference. First operand has 329 places, 448 transitions, 7288 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:26:04,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 463 transitions, 8392 flow [2024-06-14 13:26:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 463 transitions, 8011 flow, removed 142 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:05,509 INFO L231 Difference]: Finished difference. Result has 333 places, 448 transitions, 7024 flow [2024-06-14 13:26:05,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7024, PETRI_PLACES=333, PETRI_TRANSITIONS=448} [2024-06-14 13:26:05,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-14 13:26:05,509 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 448 transitions, 7024 flow [2024-06-14 13:26:05,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:05,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:26:05,510 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:05,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:05,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1431218065, now seen corresponding path program 5 times [2024-06-14 13:26:05,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:05,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043132863] [2024-06-14 13:26:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:08,733 INFO 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 13:26:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:08,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043132863] [2024-06-14 13:26:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043132863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:08,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:08,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516398975] [2024-06-14 13:26:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:08,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:08,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:08,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 448 transitions, 7024 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:08,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:08,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:08,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:11,049 INFO L124 PetriNetUnfolderBase]: 3009/4673 cut-off events. [2024-06-14 13:26:11,050 INFO L125 PetriNetUnfolderBase]: For 504400/504403 co-relation queries the response was YES. [2024-06-14 13:26:11,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48382 conditions, 4673 events. 3009/4673 cut-off events. For 504400/504403 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26050 event pairs, 513 based on Foata normal form. 4/4674 useless extension candidates. Maximal degree in co-relation 48221. Up to 3943 conditions per place. [2024-06-14 13:26:11,114 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 314 selfloop transitions, 186 changer transitions 0/504 dead transitions. [2024-06-14 13:26:11,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 504 transitions, 9231 flow [2024-06-14 13:26:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:26:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:26:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:26:11,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:26:11,117 INFO L175 Difference]: Start difference. First operand has 333 places, 448 transitions, 7024 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:26:11,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 504 transitions, 9231 flow [2024-06-14 13:26:12,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 504 transitions, 9073 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:12,649 INFO L231 Difference]: Finished difference. Result has 338 places, 479 transitions, 8270 flow [2024-06-14 13:26:12,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8270, PETRI_PLACES=338, PETRI_TRANSITIONS=479} [2024-06-14 13:26:12,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-14 13:26:12,649 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 479 transitions, 8270 flow [2024-06-14 13:26:12,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:12,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:12,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:26:12,650 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 13:26:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1431223986, now seen corresponding path program 8 times [2024-06-14 13:26:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259795162] [2024-06-14 13:26:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:15,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259795162] [2024-06-14 13:26:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259795162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:15,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292271616] [2024-06-14 13:26:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:15,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:15,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 479 transitions, 8270 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:15,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:15,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:17,292 INFO L124 PetriNetUnfolderBase]: 3006/4669 cut-off events. [2024-06-14 13:26:17,293 INFO L125 PetriNetUnfolderBase]: For 514574/514577 co-relation queries the response was YES. [2024-06-14 13:26:17,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50197 conditions, 4669 events. 3006/4669 cut-off events. For 514574/514577 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26021 event pairs, 560 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 50033. Up to 4480 conditions per place. [2024-06-14 13:26:17,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 42 changer transitions 0/492 dead transitions. [2024-06-14 13:26:17,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 492 transitions, 9278 flow [2024-06-14 13:26:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 13:26:17,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 13:26:17,365 INFO L175 Difference]: Start difference. First operand has 338 places, 479 transitions, 8270 flow. Second operand 8 states and 118 transitions. [2024-06-14 13:26:17,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 492 transitions, 9278 flow [2024-06-14 13:26:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 492 transitions, 8897 flow, removed 167 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:19,004 INFO L231 Difference]: Finished difference. Result has 342 places, 479 transitions, 7980 flow [2024-06-14 13:26:19,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7889, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=342, PETRI_TRANSITIONS=479} [2024-06-14 13:26:19,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 13:26:19,005 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 479 transitions, 7980 flow [2024-06-14 13:26:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:19,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:19,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:19,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:26:19,005 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 13:26:19,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1424784325, now seen corresponding path program 6 times [2024-06-14 13:26:19,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:19,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718022324] [2024-06-14 13:26:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:19,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718022324] [2024-06-14 13:26:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718022324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:21,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443560118] [2024-06-14 13:26:21,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:21,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:21,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 479 transitions, 7980 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:21,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:23,640 INFO L124 PetriNetUnfolderBase]: 3002/4664 cut-off events. [2024-06-14 13:26:23,640 INFO L125 PetriNetUnfolderBase]: For 519558/519561 co-relation queries the response was YES. [2024-06-14 13:26:23,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49575 conditions, 4664 events. 3002/4664 cut-off events. For 519558/519561 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26038 event pairs, 558 based on Foata normal form. 4/4665 useless extension candidates. Maximal degree in co-relation 49409. Up to 4421 conditions per place. [2024-06-14 13:26:23,867 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 428 selfloop transitions, 66 changer transitions 0/498 dead transitions. [2024-06-14 13:26:23,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 498 transitions, 9154 flow [2024-06-14 13:26:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:26:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:26:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:26:23,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:26:23,868 INFO L175 Difference]: Start difference. First operand has 342 places, 479 transitions, 7980 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:26:23,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 498 transitions, 9154 flow [2024-06-14 13:26:25,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 498 transitions, 8991 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:25,104 INFO L231 Difference]: Finished difference. Result has 344 places, 482 transitions, 8104 flow [2024-06-14 13:26:25,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7817, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8104, PETRI_PLACES=344, PETRI_TRANSITIONS=482} [2024-06-14 13:26:25,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 13:26:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 482 transitions, 8104 flow [2024-06-14 13:26:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:25,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:25,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:26:25,106 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 13:26:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash 846170402, now seen corresponding path program 9 times [2024-06-14 13:26:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433798146] [2024-06-14 13:26:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:28,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:28,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433798146] [2024-06-14 13:26:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433798146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:26:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326400414] [2024-06-14 13:26:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:26:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:26:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:26:28,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:28,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 482 transitions, 8104 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:28,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:28,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:30,418 INFO L124 PetriNetUnfolderBase]: 2999/4660 cut-off events. [2024-06-14 13:26:30,419 INFO L125 PetriNetUnfolderBase]: For 516861/516864 co-relation queries the response was YES. [2024-06-14 13:26:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49576 conditions, 4660 events. 2999/4660 cut-off events. For 516861/516864 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26027 event pairs, 568 based on Foata normal form. 1/4658 useless extension candidates. Maximal degree in co-relation 49409. Up to 4335 conditions per place. [2024-06-14 13:26:30,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 82 changer transitions 0/502 dead transitions. [2024-06-14 13:26:30,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 502 transitions, 9150 flow [2024-06-14 13:26:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:26:30,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:26:30,505 INFO L175 Difference]: Start difference. First operand has 344 places, 482 transitions, 8104 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:26:30,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 502 transitions, 9150 flow [2024-06-14 13:26:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 502 transitions, 8845 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:31,848 INFO L231 Difference]: Finished difference. Result has 345 places, 482 transitions, 7984 flow [2024-06-14 13:26:31,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7984, PETRI_PLACES=345, PETRI_TRANSITIONS=482} [2024-06-14 13:26:31,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 13:26:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 482 transitions, 7984 flow [2024-06-14 13:26:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:31,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:31,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:26:31,849 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 13:26:31,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1396104436, now seen corresponding path program 10 times [2024-06-14 13:26:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121965612] [2024-06-14 13:26:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:35,721 INFO 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 13:26:35,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121965612] [2024-06-14 13:26:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121965612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:35,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:35,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932341809] [2024-06-14 13:26:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:35,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:35,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 482 transitions, 7984 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:35,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:35,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:35,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:37,416 INFO L124 PetriNetUnfolderBase]: 2996/4654 cut-off events. [2024-06-14 13:26:37,417 INFO L125 PetriNetUnfolderBase]: For 521361/521364 co-relation queries the response was YES. [2024-06-14 13:26:37,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49370 conditions, 4654 events. 2996/4654 cut-off events. For 521361/521364 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 25911 event pairs, 566 based on Foata normal form. 1/4652 useless extension candidates. Maximal degree in co-relation 49202. Up to 4345 conditions per place. [2024-06-14 13:26:37,492 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 97 changer transitions 0/501 dead transitions. [2024-06-14 13:26:37,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 501 transitions, 9156 flow [2024-06-14 13:26:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:26:37,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 13:26:37,494 INFO L175 Difference]: Start difference. First operand has 345 places, 482 transitions, 7984 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:26:37,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 501 transitions, 9156 flow [2024-06-14 13:26:39,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 501 transitions, 8929 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:39,155 INFO L231 Difference]: Finished difference. Result has 345 places, 485 transitions, 8128 flow [2024-06-14 13:26:39,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8128, PETRI_PLACES=345, PETRI_TRANSITIONS=485} [2024-06-14 13:26:39,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 13:26:39,155 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 485 transitions, 8128 flow [2024-06-14 13:26:39,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:39,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:39,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:39,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:26:39,156 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 13:26:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash 846260767, now seen corresponding path program 4 times [2024-06-14 13:26:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42126587] [2024-06-14 13:26:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42126587] [2024-06-14 13:26:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42126587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:42,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535970249] [2024-06-14 13:26:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:42,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:42,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 485 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:42,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:42,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:42,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:44,905 INFO L124 PetriNetUnfolderBase]: 3006/4668 cut-off events. [2024-06-14 13:26:44,905 INFO L125 PetriNetUnfolderBase]: For 542214/542217 co-relation queries the response was YES. [2024-06-14 13:26:44,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50119 conditions, 4668 events. 3006/4668 cut-off events. For 542214/542217 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26048 event pairs, 556 based on Foata normal form. 2/4667 useless extension candidates. Maximal degree in co-relation 49950. Up to 4297 conditions per place. [2024-06-14 13:26:45,015 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 127 changer transitions 0/507 dead transitions. [2024-06-14 13:26:45,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 507 transitions, 9351 flow [2024-06-14 13:26:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:26:45,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:26:45,017 INFO L175 Difference]: Start difference. First operand has 345 places, 485 transitions, 8128 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:26:45,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 507 transitions, 9351 flow [2024-06-14 13:26:46,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 507 transitions, 9072 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:46,804 INFO L231 Difference]: Finished difference. Result has 348 places, 488 transitions, 8281 flow [2024-06-14 13:26:46,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8281, PETRI_PLACES=348, PETRI_TRANSITIONS=488} [2024-06-14 13:26:46,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 13:26:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 488 transitions, 8281 flow [2024-06-14 13:26:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:46,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:46,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:46,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:26:46,806 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 13:26:46,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash -470705835, now seen corresponding path program 7 times [2024-06-14 13:26:46,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:46,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239102024] [2024-06-14 13:26:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:46,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:50,192 INFO 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 13:26:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239102024] [2024-06-14 13:26:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239102024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:50,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:50,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:50,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901717580] [2024-06-14 13:26:50,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:50,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:50,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 488 transitions, 8281 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:50,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:50,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:52,440 INFO L124 PetriNetUnfolderBase]: 3060/4750 cut-off events. [2024-06-14 13:26:52,440 INFO L125 PetriNetUnfolderBase]: For 566515/566520 co-relation queries the response was YES. [2024-06-14 13:26:52,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51648 conditions, 4750 events. 3060/4750 cut-off events. For 566515/566520 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26553 event pairs, 580 based on Foata normal form. 6/4754 useless extension candidates. Maximal degree in co-relation 51478. Up to 4486 conditions per place. [2024-06-14 13:26:52,559 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 69 changer transitions 0/535 dead transitions. [2024-06-14 13:26:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 535 transitions, 10020 flow [2024-06-14 13:26:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:26:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:26:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:26:52,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-14 13:26:52,561 INFO L175 Difference]: Start difference. First operand has 348 places, 488 transitions, 8281 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:26:52,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 535 transitions, 10020 flow [2024-06-14 13:26:55,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 535 transitions, 9740 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:55,240 INFO L231 Difference]: Finished difference. Result has 354 places, 506 transitions, 8586 flow [2024-06-14 13:26:55,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8586, PETRI_PLACES=354, PETRI_TRANSITIONS=506} [2024-06-14 13:26:55,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-14 13:26:55,241 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 506 transitions, 8586 flow [2024-06-14 13:26:55,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:55,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:55,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:55,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:26:55,242 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 13:26:55,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash -145964715, now seen corresponding path program 8 times [2024-06-14 13:26:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109457053] [2024-06-14 13:26:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:58,220 INFO 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 13:26:58,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:58,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109457053] [2024-06-14 13:26:58,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109457053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:58,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:58,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952424477] [2024-06-14 13:26:58,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:58,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:58,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:58,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 506 transitions, 8586 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:58,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:58,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:58,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:00,254 INFO L124 PetriNetUnfolderBase]: 3070/4770 cut-off events. [2024-06-14 13:27:00,254 INFO L125 PetriNetUnfolderBase]: For 581794/581799 co-relation queries the response was YES. [2024-06-14 13:27:00,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52106 conditions, 4770 events. 3070/4770 cut-off events. For 581794/581799 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 26769 event pairs, 574 based on Foata normal form. 6/4774 useless extension candidates. Maximal degree in co-relation 51934. Up to 4511 conditions per place. [2024-06-14 13:27:00,332 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 460 selfloop transitions, 67 changer transitions 0/531 dead transitions. [2024-06-14 13:27:00,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 531 transitions, 9832 flow [2024-06-14 13:27:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:27:00,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-14 13:27:00,334 INFO L175 Difference]: Start difference. First operand has 354 places, 506 transitions, 8586 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:27:00,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 531 transitions, 9832 flow [2024-06-14 13:27:02,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 531 transitions, 9594 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:02,151 INFO L231 Difference]: Finished difference. Result has 360 places, 509 transitions, 8622 flow [2024-06-14 13:27:02,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8622, PETRI_PLACES=360, PETRI_TRANSITIONS=509} [2024-06-14 13:27:02,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 13:27:02,152 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 509 transitions, 8622 flow [2024-06-14 13:27:02,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:02,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:02,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:27:02,153 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 13:27:02,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash -145578765, now seen corresponding path program 9 times [2024-06-14 13:27:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738529941] [2024-06-14 13:27:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:05,237 INFO 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 13:27:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738529941] [2024-06-14 13:27:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738529941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273500574] [2024-06-14 13:27:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:05,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:05,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 509 transitions, 8622 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:05,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:05,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:05,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:07,379 INFO L124 PetriNetUnfolderBase]: 3112/4824 cut-off events. [2024-06-14 13:27:07,379 INFO L125 PetriNetUnfolderBase]: For 608605/608610 co-relation queries the response was YES. [2024-06-14 13:27:07,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53382 conditions, 4824 events. 3112/4824 cut-off events. For 608605/608610 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27010 event pairs, 567 based on Foata normal form. 6/4828 useless extension candidates. Maximal degree in co-relation 53208. Up to 4344 conditions per place. [2024-06-14 13:27:07,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 416 selfloop transitions, 146 changer transitions 0/566 dead transitions. [2024-06-14 13:27:07,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 566 transitions, 11106 flow [2024-06-14 13:27:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:27:07,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 13:27:07,493 INFO L175 Difference]: Start difference. First operand has 360 places, 509 transitions, 8622 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:27:07,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 566 transitions, 11106 flow [2024-06-14 13:27:10,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 566 transitions, 10892 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:10,176 INFO L231 Difference]: Finished difference. Result has 364 places, 535 transitions, 9555 flow [2024-06-14 13:27:10,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8414, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9555, PETRI_PLACES=364, PETRI_TRANSITIONS=535} [2024-06-14 13:27:10,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 13:27:10,177 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 535 transitions, 9555 flow [2024-06-14 13:27:10,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:10,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:10,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:27:10,178 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 13:27:10,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1660402927, now seen corresponding path program 10 times [2024-06-14 13:27:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:10,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274236582] [2024-06-14 13:27:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:10,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:12,953 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 13:27:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274236582] [2024-06-14 13:27:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274236582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:12,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316248697] [2024-06-14 13:27:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:12,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:12,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:12,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 535 transitions, 9555 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:12,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:12,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:12,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:15,184 INFO L124 PetriNetUnfolderBase]: 3122/4832 cut-off events. [2024-06-14 13:27:15,185 INFO L125 PetriNetUnfolderBase]: For 617067/617072 co-relation queries the response was YES. [2024-06-14 13:27:15,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54340 conditions, 4832 events. 3122/4832 cut-off events. For 617067/617072 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27063 event pairs, 572 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 54164. Up to 4618 conditions per place. [2024-06-14 13:27:15,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 48 changer transitions 0/570 dead transitions. [2024-06-14 13:27:15,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 570 transitions, 11157 flow [2024-06-14 13:27:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:27:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:27:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:27:15,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-14 13:27:15,260 INFO L175 Difference]: Start difference. First operand has 364 places, 535 transitions, 9555 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:27:15,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 570 transitions, 11157 flow [2024-06-14 13:27:16,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 570 transitions, 10859 flow, removed 139 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:16,845 INFO L231 Difference]: Finished difference. Result has 374 places, 540 transitions, 9589 flow [2024-06-14 13:27:16,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9275, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9589, PETRI_PLACES=374, PETRI_TRANSITIONS=540} [2024-06-14 13:27:16,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-14 13:27:16,846 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 540 transitions, 9589 flow [2024-06-14 13:27:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:16,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:16,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:16,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:27:16,847 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 13:27:16,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1663193671, now seen corresponding path program 5 times [2024-06-14 13:27:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:16,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464491298] [2024-06-14 13:27:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:20,658 INFO 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 13:27:20,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464491298] [2024-06-14 13:27:20,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464491298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:20,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:20,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:20,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288645469] [2024-06-14 13:27:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:20,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:20,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:20,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:20,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 540 transitions, 9589 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:20,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:20,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:23,188 INFO L124 PetriNetUnfolderBase]: 3221/4985 cut-off events. [2024-06-14 13:27:23,188 INFO L125 PetriNetUnfolderBase]: For 670912/670917 co-relation queries the response was YES. [2024-06-14 13:27:23,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56986 conditions, 4985 events. 3221/4985 cut-off events. For 670912/670917 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28039 event pairs, 578 based on Foata normal form. 8/4991 useless extension candidates. Maximal degree in co-relation 56805. Up to 4685 conditions per place. [2024-06-14 13:27:23,274 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 533 selfloop transitions, 50 changer transitions 0/587 dead transitions. [2024-06-14 13:27:23,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 587 transitions, 11835 flow [2024-06-14 13:27:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:27:23,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:27:23,275 INFO L175 Difference]: Start difference. First operand has 374 places, 540 transitions, 9589 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:27:23,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 587 transitions, 11835 flow [2024-06-14 13:27:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 587 transitions, 11552 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-14 13:27:25,227 INFO L231 Difference]: Finished difference. Result has 376 places, 560 transitions, 10114 flow [2024-06-14 13:27:25,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9306, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10114, PETRI_PLACES=376, PETRI_TRANSITIONS=560} [2024-06-14 13:27:25,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-14 13:27:25,227 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 560 transitions, 10114 flow [2024-06-14 13:27:25,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:25,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:25,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:27:25,228 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 13:27:25,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1057094081, now seen corresponding path program 6 times [2024-06-14 13:27:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432939556] [2024-06-14 13:27:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432939556] [2024-06-14 13:27:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432939556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:28,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:28,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:28,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691407291] [2024-06-14 13:27:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:28,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:28,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:28,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:28,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 560 transitions, 10114 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:28,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:28,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:28,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:31,031 INFO L124 PetriNetUnfolderBase]: 3213/4981 cut-off events. [2024-06-14 13:27:31,031 INFO L125 PetriNetUnfolderBase]: For 679049/679054 co-relation queries the response was YES. [2024-06-14 13:27:31,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57029 conditions, 4981 events. 3213/4981 cut-off events. For 679049/679054 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28109 event pairs, 580 based on Foata normal form. 8/4987 useless extension candidates. Maximal degree in co-relation 56848. Up to 4682 conditions per place. [2024-06-14 13:27:31,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 530 selfloop transitions, 51 changer transitions 0/585 dead transitions. [2024-06-14 13:27:31,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 585 transitions, 11532 flow [2024-06-14 13:27:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:27:31,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-14 13:27:31,115 INFO L175 Difference]: Start difference. First operand has 376 places, 560 transitions, 10114 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:27:31,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 585 transitions, 11532 flow [2024-06-14 13:27:33,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 585 transitions, 11055 flow, removed 226 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:33,827 INFO L231 Difference]: Finished difference. Result has 382 places, 561 transitions, 9771 flow [2024-06-14 13:27:33,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9771, PETRI_PLACES=382, PETRI_TRANSITIONS=561} [2024-06-14 13:27:33,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 13:27:33,828 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 561 transitions, 9771 flow [2024-06-14 13:27:33,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:33,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:33,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:27:33,829 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 13:27:33,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1663204087, now seen corresponding path program 11 times [2024-06-14 13:27:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140635021] [2024-06-14 13:27:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:33,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:38,316 INFO 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 13:27:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140635021] [2024-06-14 13:27:38,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140635021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:38,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:38,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250170068] [2024-06-14 13:27:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:38,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:38,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 561 transitions, 9771 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:38,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:38,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:38,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:40,300 INFO L124 PetriNetUnfolderBase]: 3233/5005 cut-off events. [2024-06-14 13:27:40,301 INFO L125 PetriNetUnfolderBase]: For 677469/677474 co-relation queries the response was YES. [2024-06-14 13:27:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56501 conditions, 5005 events. 3233/5005 cut-off events. For 677469/677474 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 28247 event pairs, 577 based on Foata normal form. 8/5011 useless extension candidates. Maximal degree in co-relation 56317. Up to 4776 conditions per place. [2024-06-14 13:27:40,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 549 selfloop transitions, 35 changer transitions 0/588 dead transitions. [2024-06-14 13:27:40,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 588 transitions, 11181 flow [2024-06-14 13:27:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:27:40,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:27:40,390 INFO L175 Difference]: Start difference. First operand has 382 places, 561 transitions, 9771 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:27:40,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 588 transitions, 11181 flow [2024-06-14 13:27:42,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 588 transitions, 11102 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:42,597 INFO L231 Difference]: Finished difference. Result has 386 places, 565 transitions, 9941 flow [2024-06-14 13:27:42,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=386, PETRI_TRANSITIONS=565} [2024-06-14 13:27:42,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-14 13:27:42,598 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 565 transitions, 9941 flow [2024-06-14 13:27:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:42,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:42,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:42,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:27:42,598 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 13:27:42,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1057089617, now seen corresponding path program 12 times [2024-06-14 13:27:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:42,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938882484] [2024-06-14 13:27:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:46,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938882484] [2024-06-14 13:27:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938882484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174359502] [2024-06-14 13:27:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:46,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:46,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:46,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:46,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 565 transitions, 9941 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:46,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:46,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:46,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:48,382 INFO L124 PetriNetUnfolderBase]: 3233/4999 cut-off events. [2024-06-14 13:27:48,383 INFO L125 PetriNetUnfolderBase]: For 683860/683863 co-relation queries the response was YES. [2024-06-14 13:27:48,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56540 conditions, 4999 events. 3233/4999 cut-off events. For 683860/683863 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 28116 event pairs, 574 based on Foata normal form. 4/5000 useless extension candidates. Maximal degree in co-relation 56355. Up to 4658 conditions per place. [2024-06-14 13:27:48,455 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 83 changer transitions 0/596 dead transitions. [2024-06-14 13:27:48,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 596 transitions, 11365 flow [2024-06-14 13:27:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:27:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:27:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-14 13:27:48,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-14 13:27:48,456 INFO L175 Difference]: Start difference. First operand has 386 places, 565 transitions, 9941 flow. Second operand 11 states and 169 transitions. [2024-06-14 13:27:48,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 596 transitions, 11365 flow [2024-06-14 13:27:50,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 596 transitions, 11174 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:50,849 INFO L231 Difference]: Finished difference. Result has 390 places, 568 transitions, 10067 flow [2024-06-14 13:27:50,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9750, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10067, PETRI_PLACES=390, PETRI_TRANSITIONS=568} [2024-06-14 13:27:50,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 13:27:50,850 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 568 transitions, 10067 flow [2024-06-14 13:27:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:50,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:50,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:50,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:27:50,851 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 13:27:50,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1760833087, now seen corresponding path program 7 times [2024-06-14 13:27:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:50,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321352946] [2024-06-14 13:27:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:55,528 INFO 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 13:27:55,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:55,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321352946] [2024-06-14 13:27:55,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321352946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:55,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:55,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:55,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508791189] [2024-06-14 13:27:55,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:55,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 568 transitions, 10067 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:57,778 INFO L124 PetriNetUnfolderBase]: 3259/5043 cut-off events. [2024-06-14 13:27:57,778 INFO L125 PetriNetUnfolderBase]: For 699998/700003 co-relation queries the response was YES. [2024-06-14 13:27:57,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57551 conditions, 5043 events. 3259/5043 cut-off events. For 699998/700003 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28453 event pairs, 589 based on Foata normal form. 6/5047 useless extension candidates. Maximal degree in co-relation 57365. Up to 4796 conditions per place. [2024-06-14 13:27:57,866 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 53 changer transitions 0/594 dead transitions. [2024-06-14 13:27:57,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 594 transitions, 11827 flow [2024-06-14 13:27:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:27:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:27:57,868 INFO L175 Difference]: Start difference. First operand has 390 places, 568 transitions, 10067 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:27:57,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 594 transitions, 11827 flow [2024-06-14 13:28:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 594 transitions, 11464 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-14 13:28:00,076 INFO L231 Difference]: Finished difference. Result has 390 places, 574 transitions, 10156 flow [2024-06-14 13:28:00,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9706, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10156, PETRI_PLACES=390, PETRI_TRANSITIONS=574} [2024-06-14 13:28:00,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 13:28:00,077 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 574 transitions, 10156 flow [2024-06-14 13:28:00,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:00,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:00,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:00,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:28:00,078 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 13:28:00,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1760843317, now seen corresponding path program 8 times [2024-06-14 13:28:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523894357] [2024-06-14 13:28:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:04,270 INFO 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 13:28:04,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523894357] [2024-06-14 13:28:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523894357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:04,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:04,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564670356] [2024-06-14 13:28:04,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:04,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:04,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 574 transitions, 10156 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:04,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:04,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:06,433 INFO L124 PetriNetUnfolderBase]: 3253/5037 cut-off events. [2024-06-14 13:28:06,433 INFO L125 PetriNetUnfolderBase]: For 695737/695742 co-relation queries the response was YES. [2024-06-14 13:28:06,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57004 conditions, 5037 events. 3253/5037 cut-off events. For 695737/695742 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28460 event pairs, 585 based on Foata normal form. 6/5041 useless extension candidates. Maximal degree in co-relation 56818. Up to 4791 conditions per place. [2024-06-14 13:28:06,515 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 538 selfloop transitions, 54 changer transitions 0/596 dead transitions. [2024-06-14 13:28:06,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 596 transitions, 11426 flow [2024-06-14 13:28:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-06-14 13:28:06,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398268398268398 [2024-06-14 13:28:06,517 INFO L175 Difference]: Start difference. First operand has 390 places, 574 transitions, 10156 flow. Second operand 11 states and 157 transitions. [2024-06-14 13:28:06,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 596 transitions, 11426 flow [2024-06-14 13:28:08,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 596 transitions, 11067 flow, removed 164 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:08,676 INFO L231 Difference]: Finished difference. Result has 397 places, 574 transitions, 9911 flow [2024-06-14 13:28:08,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9797, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9911, PETRI_PLACES=397, PETRI_TRANSITIONS=574} [2024-06-14 13:28:08,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 13:28:08,677 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 574 transitions, 9911 flow [2024-06-14 13:28:08,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:08,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:08,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:28:08,677 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 13:28:08,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1142521481, now seen corresponding path program 13 times [2024-06-14 13:28:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:08,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966210352] [2024-06-14 13:28:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:13,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:13,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966210352] [2024-06-14 13:28:13,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966210352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:13,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:13,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:13,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651064869] [2024-06-14 13:28:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:13,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:13,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 574 transitions, 9911 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:13,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:13,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:13,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:15,636 INFO L124 PetriNetUnfolderBase]: 3273/5069 cut-off events. [2024-06-14 13:28:15,636 INFO L125 PetriNetUnfolderBase]: For 700679/700684 co-relation queries the response was YES. [2024-06-14 13:28:15,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57055 conditions, 5069 events. 3273/5069 cut-off events. For 700679/700684 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28644 event pairs, 556 based on Foata normal form. 6/5073 useless extension candidates. Maximal degree in co-relation 56868. Up to 4744 conditions per place. [2024-06-14 13:28:15,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 527 selfloop transitions, 71 changer transitions 0/602 dead transitions. [2024-06-14 13:28:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 602 transitions, 11369 flow [2024-06-14 13:28:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-14 13:28:15,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-14 13:28:15,715 INFO L175 Difference]: Start difference. First operand has 397 places, 574 transitions, 9911 flow. Second operand 10 states and 151 transitions. [2024-06-14 13:28:15,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 602 transitions, 11369 flow [2024-06-14 13:28:17,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 602 transitions, 11169 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-14 13:28:17,990 INFO L231 Difference]: Finished difference. Result has 396 places, 580 transitions, 10054 flow [2024-06-14 13:28:17,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9719, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10054, PETRI_PLACES=396, PETRI_TRANSITIONS=580} [2024-06-14 13:28:17,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 13:28:17,991 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 580 transitions, 10054 flow [2024-06-14 13:28:17,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:17,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:17,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:28:17,992 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 13:28:17,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1753099951, now seen corresponding path program 14 times [2024-06-14 13:28:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:17,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007742969] [2024-06-14 13:28:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007742969] [2024-06-14 13:28:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007742969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383844722] [2024-06-14 13:28:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:21,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:21,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:21,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 580 transitions, 10054 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:21,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:21,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:21,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:23,668 INFO L124 PetriNetUnfolderBase]: 3267/5061 cut-off events. [2024-06-14 13:28:23,668 INFO L125 PetriNetUnfolderBase]: For 708413/708418 co-relation queries the response was YES. [2024-06-14 13:28:23,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57281 conditions, 5061 events. 3267/5061 cut-off events. For 708413/708418 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28658 event pairs, 559 based on Foata normal form. 6/5065 useless extension candidates. Maximal degree in co-relation 57094. Up to 4672 conditions per place. [2024-06-14 13:28:23,749 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 94 changer transitions 0/601 dead transitions. [2024-06-14 13:28:23,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 601 transitions, 11456 flow [2024-06-14 13:28:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:28:23,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:28:23,752 INFO L175 Difference]: Start difference. First operand has 396 places, 580 transitions, 10054 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:28:23,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 601 transitions, 11456 flow [2024-06-14 13:28:25,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 601 transitions, 11211 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:25,858 INFO L231 Difference]: Finished difference. Result has 397 places, 583 transitions, 10158 flow [2024-06-14 13:28:25,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9809, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10158, PETRI_PLACES=397, PETRI_TRANSITIONS=583} [2024-06-14 13:28:25,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 13:28:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 583 transitions, 10158 flow [2024-06-14 13:28:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:25,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:25,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:25,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:28:25,859 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 13:28:25,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1748868637, now seen corresponding path program 9 times [2024-06-14 13:28:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:25,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129070788] [2024-06-14 13:28:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:29,689 INFO 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 13:28:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129070788] [2024-06-14 13:28:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129070788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:29,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:29,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979737778] [2024-06-14 13:28:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:29,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:29,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:29,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:29,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 583 transitions, 10158 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:29,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:29,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:29,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:31,696 INFO L124 PetriNetUnfolderBase]: 3261/5053 cut-off events. [2024-06-14 13:28:31,697 INFO L125 PetriNetUnfolderBase]: For 714442/714447 co-relation queries the response was YES. [2024-06-14 13:28:31,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57292 conditions, 5053 events. 3261/5053 cut-off events. For 714442/714447 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28619 event pairs, 555 based on Foata normal form. 6/5057 useless extension candidates. Maximal degree in co-relation 57104. Up to 4729 conditions per place. [2024-06-14 13:28:31,784 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 528 selfloop transitions, 78 changer transitions 0/610 dead transitions. [2024-06-14 13:28:31,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 610 transitions, 11658 flow [2024-06-14 13:28:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:28:31,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:28:31,787 INFO L175 Difference]: Start difference. First operand has 397 places, 583 transitions, 10158 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:28:31,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 610 transitions, 11658 flow [2024-06-14 13:28:34,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 610 transitions, 11353 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:34,184 INFO L231 Difference]: Finished difference. Result has 401 places, 590 transitions, 10273 flow [2024-06-14 13:28:34,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9855, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10273, PETRI_PLACES=401, PETRI_TRANSITIONS=590} [2024-06-14 13:28:34,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-14 13:28:34,187 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 590 transitions, 10273 flow [2024-06-14 13:28:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:34,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:34,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:28:34,188 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 13:28:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 399746177, now seen corresponding path program 15 times [2024-06-14 13:28:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860604860] [2024-06-14 13:28:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860604860] [2024-06-14 13:28:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860604860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:37,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:37,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706105424] [2024-06-14 13:28:37,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:37,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:37,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 590 transitions, 10273 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:37,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:37,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:37,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:39,308 INFO L124 PetriNetUnfolderBase]: 3281/5077 cut-off events. [2024-06-14 13:28:39,308 INFO L125 PetriNetUnfolderBase]: For 725751/725754 co-relation queries the response was YES. [2024-06-14 13:28:39,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57692 conditions, 5077 events. 3281/5077 cut-off events. For 725751/725754 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28673 event pairs, 584 based on Foata normal form. 4/5078 useless extension candidates. Maximal degree in co-relation 57502. Up to 4651 conditions per place. [2024-06-14 13:28:39,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 142 changer transitions 0/624 dead transitions. [2024-06-14 13:28:39,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 624 transitions, 12244 flow [2024-06-14 13:28:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:28:39,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:28:39,398 INFO L175 Difference]: Start difference. First operand has 401 places, 590 transitions, 10273 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:28:39,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 624 transitions, 12244 flow [2024-06-14 13:28:41,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 624 transitions, 11968 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:41,418 INFO L231 Difference]: Finished difference. Result has 404 places, 596 transitions, 10605 flow [2024-06-14 13:28:41,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9997, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10605, PETRI_PLACES=404, PETRI_TRANSITIONS=596} [2024-06-14 13:28:41,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 13:28:41,419 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 596 transitions, 10605 flow [2024-06-14 13:28:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:41,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:41,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:41,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:28:41,419 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:41,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1751438985, now seen corresponding path program 16 times [2024-06-14 13:28:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033803926] [2024-06-14 13:28:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:43,965 INFO 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 13:28:43,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:43,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033803926] [2024-06-14 13:28:43,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033803926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:43,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:43,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032389285] [2024-06-14 13:28:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:43,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:43,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:43,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 596 transitions, 10605 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:43,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:43,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:43,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:46,433 INFO L124 PetriNetUnfolderBase]: 3312/5116 cut-off events. [2024-06-14 13:28:46,433 INFO L125 PetriNetUnfolderBase]: For 746754/746757 co-relation queries the response was YES. [2024-06-14 13:28:46,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58928 conditions, 5116 events. 3312/5116 cut-off events. For 746754/746757 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 28888 event pairs, 582 based on Foata normal form. 2/5115 useless extension candidates. Maximal degree in co-relation 58737. Up to 4731 conditions per place. [2024-06-14 13:28:46,556 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 488 selfloop transitions, 137 changer transitions 0/629 dead transitions. [2024-06-14 13:28:46,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 629 transitions, 12729 flow [2024-06-14 13:28:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:28:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 13:28:46,557 INFO L175 Difference]: Start difference. First operand has 404 places, 596 transitions, 10605 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:28:46,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 629 transitions, 12729 flow [2024-06-14 13:28:48,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 629 transitions, 12181 flow, removed 134 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:48,747 INFO L231 Difference]: Finished difference. Result has 408 places, 608 transitions, 10862 flow [2024-06-14 13:28:48,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10063, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10862, PETRI_PLACES=408, PETRI_TRANSITIONS=608} [2024-06-14 13:28:48,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-14 13:28:48,748 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 608 transitions, 10862 flow [2024-06-14 13:28:48,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:48,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:48,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:28:48,749 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:48,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1755907635, now seen corresponding path program 17 times [2024-06-14 13:28:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764063472] [2024-06-14 13:28:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:51,713 INFO 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 13:28:51,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764063472] [2024-06-14 13:28:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764063472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:51,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:51,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658791537] [2024-06-14 13:28:51,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:51,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:51,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 608 transitions, 10862 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:51,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:51,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:51,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:54,255 INFO L124 PetriNetUnfolderBase]: 3351/5169 cut-off events. [2024-06-14 13:28:54,255 INFO L125 PetriNetUnfolderBase]: For 772743/772746 co-relation queries the response was YES. [2024-06-14 13:28:54,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60128 conditions, 5169 events. 3351/5169 cut-off events. For 772743/772746 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29177 event pairs, 580 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 59934. Up to 4664 conditions per place. [2024-06-14 13:28:54,332 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 462 selfloop transitions, 177 changer transitions 0/643 dead transitions. [2024-06-14 13:28:54,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 643 transitions, 13286 flow [2024-06-14 13:28:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:28:54,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-14 13:28:54,334 INFO L175 Difference]: Start difference. First operand has 408 places, 608 transitions, 10862 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:28:54,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 643 transitions, 13286 flow [2024-06-14 13:28:56,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 643 transitions, 12896 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:56,843 INFO L231 Difference]: Finished difference. Result has 417 places, 621 transitions, 11521 flow [2024-06-14 13:28:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11521, PETRI_PLACES=417, PETRI_TRANSITIONS=621} [2024-06-14 13:28:56,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 13:28:56,844 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 621 transitions, 11521 flow [2024-06-14 13:28:56,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:56,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:56,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:28:56,845 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:56,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash 395128727, now seen corresponding path program 18 times [2024-06-14 13:28:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454697641] [2024-06-14 13:28:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:00,309 INFO 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 13:29:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454697641] [2024-06-14 13:29:00,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454697641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:00,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:00,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:00,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837098723] [2024-06-14 13:29:00,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:00,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:00,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 621 transitions, 11521 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:00,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:00,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:00,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:02,534 INFO L124 PetriNetUnfolderBase]: 3345/5162 cut-off events. [2024-06-14 13:29:02,534 INFO L125 PetriNetUnfolderBase]: For 785125/785128 co-relation queries the response was YES. [2024-06-14 13:29:02,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60561 conditions, 5162 events. 3345/5162 cut-off events. For 785125/785128 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 29112 event pairs, 585 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 60363. Up to 4945 conditions per place. [2024-06-14 13:29:02,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 51 changer transitions 0/636 dead transitions. [2024-06-14 13:29:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 636 transitions, 12833 flow [2024-06-14 13:29:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:29:02,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-14 13:29:02,804 INFO L175 Difference]: Start difference. First operand has 417 places, 621 transitions, 11521 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:29:02,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 636 transitions, 12833 flow [2024-06-14 13:29:05,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 636 transitions, 12380 flow, removed 138 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:05,846 INFO L231 Difference]: Finished difference. Result has 421 places, 621 transitions, 11176 flow [2024-06-14 13:29:05,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11068, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11176, PETRI_PLACES=421, PETRI_TRANSITIONS=621} [2024-06-14 13:29:05,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-14 13:29:05,847 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 621 transitions, 11176 flow [2024-06-14 13:29:05,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:05,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:05,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:29:05,848 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:05,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 387777077, now seen corresponding path program 19 times [2024-06-14 13:29:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998399102] [2024-06-14 13:29:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:09,014 INFO 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 13:29:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998399102] [2024-06-14 13:29:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998399102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880810836] [2024-06-14 13:29:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:09,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:09,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 621 transitions, 11176 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:09,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:09,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:09,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:11,355 INFO L124 PetriNetUnfolderBase]: 3348/5167 cut-off events. [2024-06-14 13:29:11,355 INFO L125 PetriNetUnfolderBase]: For 796845/796848 co-relation queries the response was YES. [2024-06-14 13:29:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59712 conditions, 5167 events. 3348/5167 cut-off events. For 796845/796848 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 29176 event pairs, 583 based on Foata normal form. 6/5170 useless extension candidates. Maximal degree in co-relation 59514. Up to 4919 conditions per place. [2024-06-14 13:29:11,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 582 selfloop transitions, 59 changer transitions 0/645 dead transitions. [2024-06-14 13:29:11,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 645 transitions, 12731 flow [2024-06-14 13:29:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-14 13:29:11,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-14 13:29:11,609 INFO L175 Difference]: Start difference. First operand has 421 places, 621 transitions, 11176 flow. Second operand 10 states and 146 transitions. [2024-06-14 13:29:11,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 645 transitions, 12731 flow [2024-06-14 13:29:14,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 645 transitions, 12477 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:14,348 INFO L231 Difference]: Finished difference. Result has 425 places, 627 transitions, 11277 flow [2024-06-14 13:29:14,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10922, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11277, PETRI_PLACES=425, PETRI_TRANSITIONS=627} [2024-06-14 13:29:14,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-14 13:29:14,349 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 627 transitions, 11277 flow [2024-06-14 13:29:14,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:14,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:14,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:29:14,350 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:14,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2106002851, now seen corresponding path program 20 times [2024-06-14 13:29:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:14,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487831100] [2024-06-14 13:29:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:14,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:16,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487831100] [2024-06-14 13:29:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487831100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:16,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:16,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:16,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915378101] [2024-06-14 13:29:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:16,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:16,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:16,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:16,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 627 transitions, 11277 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:16,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:16,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:16,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:19,066 INFO L124 PetriNetUnfolderBase]: 3363/5192 cut-off events. [2024-06-14 13:29:19,067 INFO L125 PetriNetUnfolderBase]: For 805386/805389 co-relation queries the response was YES. [2024-06-14 13:29:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60433 conditions, 5192 events. 3363/5192 cut-off events. For 805386/805389 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 29411 event pairs, 576 based on Foata normal form. 5/5194 useless extension candidates. Maximal degree in co-relation 60233. Up to 4915 conditions per place. [2024-06-14 13:29:19,159 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 572 selfloop transitions, 76 changer transitions 0/652 dead transitions. [2024-06-14 13:29:19,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 652 transitions, 13225 flow [2024-06-14 13:29:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:29:19,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:29:19,161 INFO L175 Difference]: Start difference. First operand has 425 places, 627 transitions, 11277 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:29:19,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 652 transitions, 13225 flow [2024-06-14 13:29:22,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 652 transitions, 12906 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:22,634 INFO L231 Difference]: Finished difference. Result has 427 places, 635 transitions, 11567 flow [2024-06-14 13:29:22,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10958, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11567, PETRI_PLACES=427, PETRI_TRANSITIONS=635} [2024-06-14 13:29:22,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 13:29:22,634 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 635 transitions, 11567 flow [2024-06-14 13:29:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:22,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:22,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:22,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:29:22,635 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:22,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2106240187, now seen corresponding path program 1 times [2024-06-14 13:29:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:22,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338155258] [2024-06-14 13:29:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338155258] [2024-06-14 13:29:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338155258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:25,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801177764] [2024-06-14 13:29:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:25,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:25,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:25,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 635 transitions, 11567 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:25,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:25,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:28,150 INFO L124 PetriNetUnfolderBase]: 3345/5170 cut-off events. [2024-06-14 13:29:28,150 INFO L125 PetriNetUnfolderBase]: For 797575/797578 co-relation queries the response was YES. [2024-06-14 13:29:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59788 conditions, 5170 events. 3345/5170 cut-off events. For 797575/797578 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 29297 event pairs, 582 based on Foata normal form. 4/5171 useless extension candidates. Maximal degree in co-relation 59587. Up to 4908 conditions per place. [2024-06-14 13:29:28,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 575 selfloop transitions, 71 changer transitions 0/650 dead transitions. [2024-06-14 13:29:28,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 650 transitions, 12913 flow [2024-06-14 13:29:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:29:28,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:29:28,251 INFO L175 Difference]: Start difference. First operand has 427 places, 635 transitions, 11567 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:29:28,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 650 transitions, 12913 flow [2024-06-14 13:29:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 650 transitions, 12004 flow, removed 398 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:31,270 INFO L231 Difference]: Finished difference. Result has 429 places, 635 transitions, 10829 flow [2024-06-14 13:29:31,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10829, PETRI_PLACES=429, PETRI_TRANSITIONS=635} [2024-06-14 13:29:31,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-14 13:29:31,271 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 635 transitions, 10829 flow [2024-06-14 13:29:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:31,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:31,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:31,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:29:31,272 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:31,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2011832925, now seen corresponding path program 21 times [2024-06-14 13:29:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:31,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792792817] [2024-06-14 13:29:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:34,063 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 13:29:34,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:34,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792792817] [2024-06-14 13:29:34,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792792817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:34,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:34,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:34,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014523874] [2024-06-14 13:29:34,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:34,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:34,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:34,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 635 transitions, 10829 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:34,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:34,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:34,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:36,169 INFO L124 PetriNetUnfolderBase]: 3355/5186 cut-off events. [2024-06-14 13:29:36,169 INFO L125 PetriNetUnfolderBase]: For 793204/793207 co-relation queries the response was YES. [2024-06-14 13:29:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59248 conditions, 5186 events. 3355/5186 cut-off events. For 793204/793207 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29400 event pairs, 584 based on Foata normal form. 2/5185 useless extension candidates. Maximal degree in co-relation 59046. Up to 4879 conditions per place. [2024-06-14 13:29:36,260 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 99 changer transitions 0/656 dead transitions. [2024-06-14 13:29:36,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 656 transitions, 12352 flow [2024-06-14 13:29:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:29:36,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:29:36,261 INFO L175 Difference]: Start difference. First operand has 429 places, 635 transitions, 10829 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:29:36,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 656 transitions, 12352 flow [2024-06-14 13:29:39,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 656 transitions, 12091 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:39,989 INFO L231 Difference]: Finished difference. Result has 431 places, 638 transitions, 10928 flow [2024-06-14 13:29:39,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10568, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10928, PETRI_PLACES=431, PETRI_TRANSITIONS=638} [2024-06-14 13:29:39,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-14 13:29:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 638 transitions, 10928 flow [2024-06-14 13:29:39,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:39,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:39,990 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, 1, 1] [2024-06-14 13:29:39,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:29:39,990 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:39,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 131949209, now seen corresponding path program 22 times [2024-06-14 13:29:39,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:39,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020846537] [2024-06-14 13:29:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:39,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:42,679 INFO 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 13:29:42,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:42,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020846537] [2024-06-14 13:29:42,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020846537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:42,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:42,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861491522] [2024-06-14 13:29:42,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:42,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:42,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:42,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:42,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 638 transitions, 10928 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:42,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:42,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:42,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:44,864 INFO L124 PetriNetUnfolderBase]: 3349/5178 cut-off events. [2024-06-14 13:29:44,865 INFO L125 PetriNetUnfolderBase]: For 782655/782658 co-relation queries the response was YES. [2024-06-14 13:29:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58873 conditions, 5178 events. 3349/5178 cut-off events. For 782655/782658 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29368 event pairs, 584 based on Foata normal form. 2/5177 useless extension candidates. Maximal degree in co-relation 58670. Up to 4806 conditions per place. [2024-06-14 13:29:45,110 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 532 selfloop transitions, 121 changer transitions 0/657 dead transitions. [2024-06-14 13:29:45,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 657 transitions, 12511 flow [2024-06-14 13:29:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:29:45,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 13:29:45,112 INFO L175 Difference]: Start difference. First operand has 431 places, 638 transitions, 10928 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:29:45,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 657 transitions, 12511 flow [2024-06-14 13:29:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 657 transitions, 12079 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:48,498 INFO L231 Difference]: Finished difference. Result has 433 places, 638 transitions, 10744 flow [2024-06-14 13:29:48,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10496, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10744, PETRI_PLACES=433, PETRI_TRANSITIONS=638} [2024-06-14 13:29:48,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-14 13:29:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 638 transitions, 10744 flow [2024-06-14 13:29:48,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:48,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:48,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:48,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:29:48,504 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:48,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1142328103, now seen corresponding path program 1 times [2024-06-14 13:29:48,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:48,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816720887] [2024-06-14 13:29:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:48,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:52,466 INFO 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 13:29:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816720887] [2024-06-14 13:29:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816720887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:52,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615338591] [2024-06-14 13:29:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:52,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:52,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:52,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 638 transitions, 10744 flow. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:52,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:52,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:52,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:54,579 INFO L124 PetriNetUnfolderBase]: 3336/5162 cut-off events. [2024-06-14 13:29:54,579 INFO L125 PetriNetUnfolderBase]: For 780083/780083 co-relation queries the response was YES. [2024-06-14 13:29:54,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57978 conditions, 5162 events. 3336/5162 cut-off events. For 780083/780083 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29286 event pairs, 553 based on Foata normal form. 6/5167 useless extension candidates. Maximal degree in co-relation 57775. Up to 4915 conditions per place. [2024-06-14 13:29:54,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 635 selfloop transitions, 23 changer transitions 0/662 dead transitions. [2024-06-14 13:29:54,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 662 transitions, 12268 flow [2024-06-14 13:29:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:29:54,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:29:54,663 INFO L175 Difference]: Start difference. First operand has 433 places, 638 transitions, 10744 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:29:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 662 transitions, 12268 flow [2024-06-14 13:29:58,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 662 transitions, 11973 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:58,411 INFO L231 Difference]: Finished difference. Result has 434 places, 639 transitions, 10521 flow [2024-06-14 13:29:58,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10453, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10521, PETRI_PLACES=434, PETRI_TRANSITIONS=639} [2024-06-14 13:29:58,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 13:29:58,411 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 639 transitions, 10521 flow [2024-06-14 13:29:58,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:58,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:58,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:58,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:29:58,417 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:58,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:58,417 INFO L85 PathProgramCache]: Analyzing trace with hash 368317947, now seen corresponding path program 2 times [2024-06-14 13:29:58,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:58,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928949524] [2024-06-14 13:29:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:02,185 INFO 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 13:30:02,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:02,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928949524] [2024-06-14 13:30:02,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928949524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:02,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038200443] [2024-06-14 13:30:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:02,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:02,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:02,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:02,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 639 transitions, 10521 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:02,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:02,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:04,428 INFO L124 PetriNetUnfolderBase]: 3356/5190 cut-off events. [2024-06-14 13:30:04,428 INFO L125 PetriNetUnfolderBase]: For 795034/795034 co-relation queries the response was YES. [2024-06-14 13:30:04,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58044 conditions, 5190 events. 3356/5190 cut-off events. For 795034/795034 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29505 event pairs, 558 based on Foata normal form. 6/5195 useless extension candidates. Maximal degree in co-relation 57841. Up to 5015 conditions per place. [2024-06-14 13:30:04,514 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 637 selfloop transitions, 18 changer transitions 0/659 dead transitions. [2024-06-14 13:30:04,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 659 transitions, 11950 flow [2024-06-14 13:30:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-14 13:30:04,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2024-06-14 13:30:04,518 INFO L175 Difference]: Start difference. First operand has 434 places, 639 transitions, 10521 flow. Second operand 9 states and 125 transitions. [2024-06-14 13:30:04,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 659 transitions, 11950 flow [2024-06-14 13:30:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 659 transitions, 11911 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:07,488 INFO L231 Difference]: Finished difference. Result has 437 places, 640 transitions, 10544 flow [2024-06-14 13:30:07,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10482, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10544, PETRI_PLACES=437, PETRI_TRANSITIONS=640} [2024-06-14 13:30:07,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 13:30:07,488 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 640 transitions, 10544 flow [2024-06-14 13:30:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:30:07,489 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1751245607, now seen corresponding path program 3 times [2024-06-14 13:30:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:07,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045314882] [2024-06-14 13:30:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:07,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:10,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045314882] [2024-06-14 13:30:10,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045314882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:10,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:10,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126554986] [2024-06-14 13:30:10,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:10,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:10,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:10,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 640 transitions, 10544 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:10,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:10,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:10,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:12,737 INFO L124 PetriNetUnfolderBase]: 3376/5224 cut-off events. [2024-06-14 13:30:12,738 INFO L125 PetriNetUnfolderBase]: For 807146/807146 co-relation queries the response was YES. [2024-06-14 13:30:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58452 conditions, 5224 events. 3376/5224 cut-off events. For 807146/807146 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29725 event pairs, 577 based on Foata normal form. 6/5229 useless extension candidates. Maximal degree in co-relation 58248. Up to 5037 conditions per place. [2024-06-14 13:30:12,832 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 628 selfloop transitions, 29 changer transitions 0/661 dead transitions. [2024-06-14 13:30:12,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 661 transitions, 11991 flow [2024-06-14 13:30:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-14 13:30:12,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-14 13:30:12,833 INFO L175 Difference]: Start difference. First operand has 437 places, 640 transitions, 10544 flow. Second operand 9 states and 129 transitions. [2024-06-14 13:30:12,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 661 transitions, 11991 flow [2024-06-14 13:30:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 661 transitions, 11941 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:16,239 INFO L231 Difference]: Finished difference. Result has 439 places, 641 transitions, 10580 flow [2024-06-14 13:30:16,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10494, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10580, PETRI_PLACES=439, PETRI_TRANSITIONS=641} [2024-06-14 13:30:16,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 13:30:16,240 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 641 transitions, 10580 flow [2024-06-14 13:30:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:16,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:16,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:30:16,240 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash 360043737, now seen corresponding path program 4 times [2024-06-14 13:30:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252424861] [2024-06-14 13:30:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:20,011 INFO 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 13:30:20,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:20,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252424861] [2024-06-14 13:30:20,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252424861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:20,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:20,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331054191] [2024-06-14 13:30:20,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:20,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:20,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 641 transitions, 10580 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:20,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:20,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:20,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:22,188 INFO L124 PetriNetUnfolderBase]: 3363/5203 cut-off events. [2024-06-14 13:30:22,188 INFO L125 PetriNetUnfolderBase]: For 790471/790471 co-relation queries the response was YES. [2024-06-14 13:30:22,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57752 conditions, 5203 events. 3363/5203 cut-off events. For 790471/790471 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29600 event pairs, 576 based on Foata normal form. 6/5208 useless extension candidates. Maximal degree in co-relation 57547. Up to 5017 conditions per place. [2024-06-14 13:30:22,283 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 631 selfloop transitions, 25 changer transitions 0/660 dead transitions. [2024-06-14 13:30:22,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 660 transitions, 11996 flow [2024-06-14 13:30:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 13:30:22,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:30:22,285 INFO L175 Difference]: Start difference. First operand has 439 places, 641 transitions, 10580 flow. Second operand 9 states and 126 transitions. [2024-06-14 13:30:22,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 660 transitions, 11996 flow [2024-06-14 13:30:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 660 transitions, 11922 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:25,461 INFO L231 Difference]: Finished difference. Result has 441 places, 641 transitions, 10561 flow [2024-06-14 13:30:25,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10506, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10561, PETRI_PLACES=441, PETRI_TRANSITIONS=641} [2024-06-14 13:30:25,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 13:30:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 641 transitions, 10561 flow [2024-06-14 13:30:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:30:25,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:25,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:25,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:30:25,462 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -81832800, now seen corresponding path program 1 times [2024-06-14 13:30:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084464272] [2024-06-14 13:30:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:28,534 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 13:30:28,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084464272] [2024-06-14 13:30:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084464272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:30:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023948405] [2024-06-14 13:30:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:30:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:30:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:30:28,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:28,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 641 transitions, 10561 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:28,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:28,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:28,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:30,607 INFO L124 PetriNetUnfolderBase]: 3371/5214 cut-off events. [2024-06-14 13:30:30,607 INFO L125 PetriNetUnfolderBase]: For 784069/784072 co-relation queries the response was YES. [2024-06-14 13:30:30,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57959 conditions, 5214 events. 3371/5214 cut-off events. For 784069/784072 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29587 event pairs, 467 based on Foata normal form. 2/5213 useless extension candidates. Maximal degree in co-relation 57753. Up to 4960 conditions per place. [2024-06-14 13:30:30,720 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 644 selfloop transitions, 18 changer transitions 0/666 dead transitions. [2024-06-14 13:30:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 666 transitions, 12031 flow [2024-06-14 13:30:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:30:30,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 13:30:30,722 INFO L175 Difference]: Start difference. First operand has 441 places, 641 transitions, 10561 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:30:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 666 transitions, 12031 flow [2024-06-14 13:30:34,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 666 transitions, 11917 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:30:34,577 INFO L231 Difference]: Finished difference. Result has 439 places, 643 transitions, 10582 flow [2024-06-14 13:30:34,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10447, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10582, PETRI_PLACES=439, PETRI_TRANSITIONS=643} [2024-06-14 13:30:34,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 13:30:34,578 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 643 transitions, 10582 flow [2024-06-14 13:30:34,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:34,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:34,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:34,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:30:34,578 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:34,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1380520318, now seen corresponding path program 2 times [2024-06-14 13:30:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:34,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178117032] [2024-06-14 13:30:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:37,684 INFO 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 13:30:37,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:37,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178117032] [2024-06-14 13:30:37,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178117032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:37,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:37,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4418125] [2024-06-14 13:30:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:37,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:37,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:37,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 643 transitions, 10582 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:37,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:37,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:37,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:40,144 INFO L124 PetriNetUnfolderBase]: 3516/5429 cut-off events. [2024-06-14 13:30:40,144 INFO L125 PetriNetUnfolderBase]: For 926655/926658 co-relation queries the response was YES. [2024-06-14 13:30:40,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62677 conditions, 5429 events. 3516/5429 cut-off events. For 926655/926658 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30920 event pairs, 426 based on Foata normal form. 2/5428 useless extension candidates. Maximal degree in co-relation 62472. Up to 4662 conditions per place. [2024-06-14 13:30:40,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 106 changer transitions 0/690 dead transitions. [2024-06-14 13:30:40,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 690 transitions, 12766 flow [2024-06-14 13:30:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:30:40,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 13:30:40,238 INFO L175 Difference]: Start difference. First operand has 439 places, 643 transitions, 10582 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:30:40,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 690 transitions, 12766 flow [2024-06-14 13:30:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 690 transitions, 12627 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:43,502 INFO L231 Difference]: Finished difference. Result has 445 places, 658 transitions, 11131 flow [2024-06-14 13:30:43,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10451, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11131, PETRI_PLACES=445, PETRI_TRANSITIONS=658} [2024-06-14 13:30:43,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 13:30:43,509 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 658 transitions, 11131 flow [2024-06-14 13:30:43,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:43,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:43,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:30:43,510 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:43,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash 407732914, now seen corresponding path program 3 times [2024-06-14 13:30:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:43,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019695510] [2024-06-14 13:30:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019695510] [2024-06-14 13:30:47,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019695510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:47,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:47,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:47,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863048863] [2024-06-14 13:30:47,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:47,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:47,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:47,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:47,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:47,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 658 transitions, 11131 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:47,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:47,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:47,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:49,437 INFO L124 PetriNetUnfolderBase]: 3544/5479 cut-off events. [2024-06-14 13:30:49,437 INFO L125 PetriNetUnfolderBase]: For 924253/924256 co-relation queries the response was YES. [2024-06-14 13:30:49,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63651 conditions, 5479 events. 3544/5479 cut-off events. For 924253/924256 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31442 event pairs, 603 based on Foata normal form. 2/5479 useless extension candidates. Maximal degree in co-relation 63443. Up to 5184 conditions per place. [2024-06-14 13:30:49,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 648 selfloop transitions, 32 changer transitions 0/684 dead transitions. [2024-06-14 13:30:49,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 684 transitions, 12665 flow [2024-06-14 13:30:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:30:49,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-14 13:30:49,536 INFO L175 Difference]: Start difference. First operand has 445 places, 658 transitions, 11131 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:30:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 684 transitions, 12665 flow [2024-06-14 13:30:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 684 transitions, 12522 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:52,403 INFO L231 Difference]: Finished difference. Result has 450 places, 662 transitions, 11187 flow [2024-06-14 13:30:52,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10990, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11187, PETRI_PLACES=450, PETRI_TRANSITIONS=662} [2024-06-14 13:30:52,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 13:30:52,404 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 662 transitions, 11187 flow [2024-06-14 13:30:52,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:52,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:52,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:52,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:30:52,405 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:52,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 415351474, now seen corresponding path program 4 times [2024-06-14 13:30:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786580701] [2024-06-14 13:30:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:55,881 INFO 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 13:30:55,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:55,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786580701] [2024-06-14 13:30:55,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786580701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:55,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:55,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:55,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535115696] [2024-06-14 13:30:55,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:55,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:55,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:55,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 662 transitions, 11187 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:55,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:55,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:58,407 INFO L124 PetriNetUnfolderBase]: 3552/5491 cut-off events. [2024-06-14 13:30:58,408 INFO L125 PetriNetUnfolderBase]: For 940636/940639 co-relation queries the response was YES. [2024-06-14 13:30:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63799 conditions, 5491 events. 3552/5491 cut-off events. For 940636/940639 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 31495 event pairs, 619 based on Foata normal form. 2/5491 useless extension candidates. Maximal degree in co-relation 63588. Up to 5223 conditions per place. [2024-06-14 13:30:58,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 629 selfloop transitions, 49 changer transitions 0/682 dead transitions. [2024-06-14 13:30:58,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 682 transitions, 12709 flow [2024-06-14 13:30:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:30:58,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:30:58,547 INFO L175 Difference]: Start difference. First operand has 450 places, 662 transitions, 11187 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:30:58,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 682 transitions, 12709 flow [2024-06-14 13:31:02,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 682 transitions, 12554 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:02,555 INFO L231 Difference]: Finished difference. Result has 452 places, 665 transitions, 11262 flow [2024-06-14 13:31:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11032, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11262, PETRI_PLACES=452, PETRI_TRANSITIONS=665} [2024-06-14 13:31:02,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-14 13:31:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 665 transitions, 11262 flow [2024-06-14 13:31:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:02,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:02,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:02,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:31:02,557 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2000202616, now seen corresponding path program 5 times [2024-06-14 13:31:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005934836] [2024-06-14 13:31:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:05,627 INFO 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 13:31:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005934836] [2024-06-14 13:31:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005934836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:05,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:05,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317960567] [2024-06-14 13:31:05,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:05,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 665 transitions, 11262 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:05,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:05,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:08,347 INFO L124 PetriNetUnfolderBase]: 3578/5525 cut-off events. [2024-06-14 13:31:08,360 INFO L125 PetriNetUnfolderBase]: For 961419/961422 co-relation queries the response was YES. [2024-06-14 13:31:08,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64193 conditions, 5525 events. 3578/5525 cut-off events. For 961419/961422 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 31615 event pairs, 593 based on Foata normal form. 4/5526 useless extension candidates. Maximal degree in co-relation 63981. Up to 5258 conditions per place. [2024-06-14 13:31:08,467 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 65 changer transitions 0/695 dead transitions. [2024-06-14 13:31:08,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 695 transitions, 13195 flow [2024-06-14 13:31:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:31:08,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-14 13:31:08,469 INFO L175 Difference]: Start difference. First operand has 452 places, 665 transitions, 11262 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:31:08,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 695 transitions, 13195 flow [2024-06-14 13:31:13,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 695 transitions, 12995 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:13,233 INFO L231 Difference]: Finished difference. Result has 456 places, 678 transitions, 11529 flow [2024-06-14 13:31:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11062, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11529, PETRI_PLACES=456, PETRI_TRANSITIONS=678} [2024-06-14 13:31:13,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-14 13:31:13,234 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 678 transitions, 11529 flow [2024-06-14 13:31:13,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:13,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:31:13,235 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:13,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2000084506, now seen corresponding path program 6 times [2024-06-14 13:31:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532283401] [2024-06-14 13:31:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:18,050 INFO 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 13:31:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532283401] [2024-06-14 13:31:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532283401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752741557] [2024-06-14 13:31:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:18,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:18,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 678 transitions, 11529 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:18,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:18,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:18,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:21,257 INFO L124 PetriNetUnfolderBase]: 3573/5518 cut-off events. [2024-06-14 13:31:21,258 INFO L125 PetriNetUnfolderBase]: For 950387/950390 co-relation queries the response was YES. [2024-06-14 13:31:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64173 conditions, 5518 events. 3573/5518 cut-off events. For 950387/950390 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 31618 event pairs, 589 based on Foata normal form. 2/5517 useless extension candidates. Maximal degree in co-relation 63959. Up to 5246 conditions per place. [2024-06-14 13:31:21,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 643 selfloop transitions, 52 changer transitions 0/699 dead transitions. [2024-06-14 13:31:21,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 699 transitions, 13288 flow [2024-06-14 13:31:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 13:31:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-14 13:31:21,410 INFO L175 Difference]: Start difference. First operand has 456 places, 678 transitions, 11529 flow. Second operand 9 states and 131 transitions. [2024-06-14 13:31:21,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 699 transitions, 13288 flow [2024-06-14 13:31:25,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 699 transitions, 13099 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:25,302 INFO L231 Difference]: Finished difference. Result has 460 places, 681 transitions, 11572 flow [2024-06-14 13:31:25,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11340, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11572, PETRI_PLACES=460, PETRI_TRANSITIONS=681} [2024-06-14 13:31:25,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 13:31:25,303 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 681 transitions, 11572 flow [2024-06-14 13:31:25,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:25,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:25,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:25,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:31:25,305 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:25,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1537178046, now seen corresponding path program 7 times [2024-06-14 13:31:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:25,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092004664] [2024-06-14 13:31:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:25,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:28,819 INFO 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 13:31:28,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092004664] [2024-06-14 13:31:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092004664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:28,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826666494] [2024-06-14 13:31:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:28,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:28,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:28,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 681 transitions, 11572 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:28,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:28,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:28,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:31,099 INFO L124 PetriNetUnfolderBase]: 3581/5538 cut-off events. [2024-06-14 13:31:31,099 INFO L125 PetriNetUnfolderBase]: For 968653/968658 co-relation queries the response was YES. [2024-06-14 13:31:31,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64590 conditions, 5538 events. 3581/5538 cut-off events. For 968653/968658 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 31922 event pairs, 623 based on Foata normal form. 6/5542 useless extension candidates. Maximal degree in co-relation 64374. Up to 5290 conditions per place. [2024-06-14 13:31:31,204 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 648 selfloop transitions, 48 changer transitions 0/700 dead transitions. [2024-06-14 13:31:31,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 700 transitions, 13110 flow [2024-06-14 13:31:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:31:31,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 13:31:31,206 INFO L175 Difference]: Start difference. First operand has 460 places, 681 transitions, 11572 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:31:31,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 700 transitions, 13110 flow [2024-06-14 13:31:35,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 700 transitions, 12983 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:35,025 INFO L231 Difference]: Finished difference. Result has 462 places, 683 transitions, 11658 flow [2024-06-14 13:31:35,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11658, PETRI_PLACES=462, PETRI_TRANSITIONS=683} [2024-06-14 13:31:35,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-14 13:31:35,025 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 683 transitions, 11658 flow [2024-06-14 13:31:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:35,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:35,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:35,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:31:35,026 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:35,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1356695288, now seen corresponding path program 1 times [2024-06-14 13:31:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:35,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250368972] [2024-06-14 13:31:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:38,040 INFO 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 13:31:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250368972] [2024-06-14 13:31:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250368972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680508072] [2024-06-14 13:31:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:38,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:38,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 683 transitions, 11658 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:31:38,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:38,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:38,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:40,578 INFO L124 PetriNetUnfolderBase]: 3698/5709 cut-off events. [2024-06-14 13:31:40,579 INFO L125 PetriNetUnfolderBase]: For 1076319/1076322 co-relation queries the response was YES. [2024-06-14 13:31:40,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68021 conditions, 5709 events. 3698/5709 cut-off events. For 1076319/1076322 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 32930 event pairs, 548 based on Foata normal form. 8/5714 useless extension candidates. Maximal degree in co-relation 67804. Up to 4966 conditions per place. [2024-06-14 13:31:40,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 618 selfloop transitions, 109 changer transitions 0/731 dead transitions. [2024-06-14 13:31:40,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 731 transitions, 13990 flow [2024-06-14 13:31:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:31:40,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:31:40,680 INFO L175 Difference]: Start difference. First operand has 462 places, 683 transitions, 11658 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:31:40,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 731 transitions, 13990 flow [2024-06-14 13:31:44,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 731 transitions, 13797 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:44,275 INFO L231 Difference]: Finished difference. Result has 469 places, 697 transitions, 12172 flow [2024-06-14 13:31:44,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11465, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12172, PETRI_PLACES=469, PETRI_TRANSITIONS=697} [2024-06-14 13:31:44,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 13:31:44,276 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 697 transitions, 12172 flow [2024-06-14 13:31:44,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:31:44,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:44,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:44,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:31:44,276 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:44,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 412559924, now seen corresponding path program 2 times [2024-06-14 13:31:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:44,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459073885] [2024-06-14 13:31:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:44,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:48,127 INFO 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 13:31:48,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459073885] [2024-06-14 13:31:48,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459073885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:48,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:48,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:31:48,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071348346] [2024-06-14 13:31:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:48,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:31:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:31:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:31:48,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:48,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 697 transitions, 12172 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:48,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:48,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:48,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:50,835 INFO L124 PetriNetUnfolderBase]: 3680/5683 cut-off events. [2024-06-14 13:31:50,835 INFO L125 PetriNetUnfolderBase]: For 1049436/1049439 co-relation queries the response was YES. [2024-06-14 13:31:50,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67449 conditions, 5683 events. 3680/5683 cut-off events. For 1049436/1049439 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 32818 event pairs, 621 based on Foata normal form. 8/5688 useless extension candidates. Maximal degree in co-relation 67227. Up to 5257 conditions per place. [2024-06-14 13:31:50,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 608 selfloop transitions, 110 changer transitions 0/722 dead transitions. [2024-06-14 13:31:50,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 722 transitions, 13806 flow [2024-06-14 13:31:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:31:50,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:31:50,941 INFO L175 Difference]: Start difference. First operand has 469 places, 697 transitions, 12172 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:31:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 722 transitions, 13806 flow [2024-06-14 13:31:54,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 722 transitions, 13750 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 13:31:54,892 INFO L231 Difference]: Finished difference. Result has 476 places, 697 transitions, 12351 flow [2024-06-14 13:31:54,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12116, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12351, PETRI_PLACES=476, PETRI_TRANSITIONS=697} [2024-06-14 13:31:54,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-14 13:31:54,893 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 697 transitions, 12351 flow [2024-06-14 13:31:54,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:54,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:54,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:31:54,894 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:54,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 412560048, now seen corresponding path program 1 times [2024-06-14 13:31:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207841645] [2024-06-14 13:31:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:58,447 INFO 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 13:31:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207841645] [2024-06-14 13:31:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207841645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:58,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:31:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148469697] [2024-06-14 13:31:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:58,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:31:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:31:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:31:58,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:58,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 697 transitions, 12351 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:58,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:58,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:58,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:01,338 INFO L124 PetriNetUnfolderBase]: 3708/5727 cut-off events. [2024-06-14 13:32:01,338 INFO L125 PetriNetUnfolderBase]: For 1035795/1035798 co-relation queries the response was YES. [2024-06-14 13:32:01,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68241 conditions, 5727 events. 3708/5727 cut-off events. For 1035795/1035798 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33179 event pairs, 642 based on Foata normal form. 2/5727 useless extension candidates. Maximal degree in co-relation 68017. Up to 5440 conditions per place. [2024-06-14 13:32:01,442 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 669 selfloop transitions, 55 changer transitions 0/728 dead transitions. [2024-06-14 13:32:01,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 728 transitions, 14142 flow [2024-06-14 13:32:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:32:01,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:32:01,443 INFO L175 Difference]: Start difference. First operand has 476 places, 697 transitions, 12351 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:32:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 728 transitions, 14142 flow [2024-06-14 13:32:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 728 transitions, 13933 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:05,533 INFO L231 Difference]: Finished difference. Result has 480 places, 706 transitions, 12586 flow [2024-06-14 13:32:05,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12142, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12586, PETRI_PLACES=480, PETRI_TRANSITIONS=706} [2024-06-14 13:32:05,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 13:32:05,534 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 706 transitions, 12586 flow [2024-06-14 13:32:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:05,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:05,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:05,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:32:05,535 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:05,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 415361208, now seen corresponding path program 2 times [2024-06-14 13:32:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:05,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534915088] [2024-06-14 13:32:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:09,934 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 13:32:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534915088] [2024-06-14 13:32:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534915088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:09,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:09,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:09,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277466947] [2024-06-14 13:32:09,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:09,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:09,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:09,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:09,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 706 transitions, 12586 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:09,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:09,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:09,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:12,342 INFO L124 PetriNetUnfolderBase]: 3718/5743 cut-off events. [2024-06-14 13:32:12,342 INFO L125 PetriNetUnfolderBase]: For 1063970/1063973 co-relation queries the response was YES. [2024-06-14 13:32:12,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69147 conditions, 5743 events. 3718/5743 cut-off events. For 1063970/1063973 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 33218 event pairs, 624 based on Foata normal form. 2/5743 useless extension candidates. Maximal degree in co-relation 68920. Up to 5462 conditions per place. [2024-06-14 13:32:12,452 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 670 selfloop transitions, 54 changer transitions 0/728 dead transitions. [2024-06-14 13:32:12,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 728 transitions, 14318 flow [2024-06-14 13:32:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:32:12,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:32:12,453 INFO L175 Difference]: Start difference. First operand has 480 places, 706 transitions, 12586 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:32:12,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 728 transitions, 14318 flow [2024-06-14 13:32:16,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 728 transitions, 13947 flow, removed 91 selfloop flow, removed 10 redundant places. [2024-06-14 13:32:16,521 INFO L231 Difference]: Finished difference. Result has 479 places, 709 transitions, 12549 flow [2024-06-14 13:32:16,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12216, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12549, PETRI_PLACES=479, PETRI_TRANSITIONS=709} [2024-06-14 13:32:16,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-14 13:32:16,522 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 709 transitions, 12549 flow [2024-06-14 13:32:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:16,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:32:16,523 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:16,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 415356434, now seen corresponding path program 3 times [2024-06-14 13:32:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:16,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343224457] [2024-06-14 13:32:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:21,513 INFO 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 13:32:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343224457] [2024-06-14 13:32:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343224457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:21,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:21,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:21,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549722192] [2024-06-14 13:32:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:21,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:21,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:21,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 709 transitions, 12549 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:21,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:21,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:21,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:24,042 INFO L124 PetriNetUnfolderBase]: 3746/5785 cut-off events. [2024-06-14 13:32:24,042 INFO L125 PetriNetUnfolderBase]: For 1113436/1113439 co-relation queries the response was YES. [2024-06-14 13:32:24,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69911 conditions, 5785 events. 3746/5785 cut-off events. For 1113436/1113439 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 33546 event pairs, 654 based on Foata normal form. 8/5791 useless extension candidates. Maximal degree in co-relation 69685. Up to 5398 conditions per place. [2024-06-14 13:32:24,159 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 655 selfloop transitions, 72 changer transitions 0/731 dead transitions. [2024-06-14 13:32:24,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 731 transitions, 14248 flow [2024-06-14 13:32:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:32:24,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 13:32:24,162 INFO L175 Difference]: Start difference. First operand has 479 places, 709 transitions, 12549 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:32:24,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 731 transitions, 14248 flow [2024-06-14 13:32:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 731 transitions, 13956 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-14 13:32:29,019 INFO L231 Difference]: Finished difference. Result has 480 places, 710 transitions, 12474 flow [2024-06-14 13:32:29,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12257, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12474, PETRI_PLACES=480, PETRI_TRANSITIONS=710} [2024-06-14 13:32:29,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 13:32:29,020 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 710 transitions, 12474 flow [2024-06-14 13:32:29,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:29,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:29,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:32:29,020 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:29,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash 415356558, now seen corresponding path program 3 times [2024-06-14 13:32:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:29,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739108744] [2024-06-14 13:32:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:32,892 INFO 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 13:32:32,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:32,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739108744] [2024-06-14 13:32:32,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739108744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:32,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:32,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:32,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275119006] [2024-06-14 13:32:32,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:32,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:32,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:32,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 710 transitions, 12474 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:32,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:32,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:35,598 INFO L124 PetriNetUnfolderBase]: 3756/5801 cut-off events. [2024-06-14 13:32:35,599 INFO L125 PetriNetUnfolderBase]: For 1080373/1080376 co-relation queries the response was YES. [2024-06-14 13:32:35,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70095 conditions, 5801 events. 3756/5801 cut-off events. For 1080373/1080376 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 33641 event pairs, 630 based on Foata normal form. 2/5801 useless extension candidates. Maximal degree in co-relation 69869. Up to 5484 conditions per place. [2024-06-14 13:32:35,702 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 657 selfloop transitions, 72 changer transitions 0/733 dead transitions. [2024-06-14 13:32:35,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 733 transitions, 14237 flow [2024-06-14 13:32:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:32:35,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 13:32:35,703 INFO L175 Difference]: Start difference. First operand has 480 places, 710 transitions, 12474 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:32:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 733 transitions, 14237 flow [2024-06-14 13:32:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 733 transitions, 14096 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:39,749 INFO L231 Difference]: Finished difference. Result has 482 places, 713 transitions, 12709 flow [2024-06-14 13:32:39,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12333, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12709, PETRI_PLACES=482, PETRI_TRANSITIONS=713} [2024-06-14 13:32:39,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-14 13:32:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 713 transitions, 12709 flow [2024-06-14 13:32:39,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:39,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:39,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:39,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:32:39,750 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1632084236, now seen corresponding path program 4 times [2024-06-14 13:32:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825665390] [2024-06-14 13:32:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:45,769 INFO 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 13:32:45,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:45,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825665390] [2024-06-14 13:32:45,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825665390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:45,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:32:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300443666] [2024-06-14 13:32:45,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:45,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:32:45,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:32:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:32:45,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:45,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 713 transitions, 12709 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:32:45,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:45,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:45,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:48,710 INFO L124 PetriNetUnfolderBase]: 3838/5929 cut-off events. [2024-06-14 13:32:48,710 INFO L125 PetriNetUnfolderBase]: For 1202279/1202284 co-relation queries the response was YES. [2024-06-14 13:32:48,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73480 conditions, 5929 events. 3838/5929 cut-off events. For 1202279/1202284 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 34587 event pairs, 657 based on Foata normal form. 12/5939 useless extension candidates. Maximal degree in co-relation 73253. Up to 5273 conditions per place. [2024-06-14 13:32:48,826 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 636 selfloop transitions, 120 changer transitions 0/760 dead transitions. [2024-06-14 13:32:48,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 760 transitions, 14947 flow [2024-06-14 13:32:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:32:48,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:32:48,829 INFO L175 Difference]: Start difference. First operand has 482 places, 713 transitions, 12709 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:32:48,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 760 transitions, 14947 flow [2024-06-14 13:32:53,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 760 transitions, 14640 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:53,372 INFO L231 Difference]: Finished difference. Result has 485 places, 717 transitions, 12769 flow [2024-06-14 13:32:53,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12404, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12769, PETRI_PLACES=485, PETRI_TRANSITIONS=717} [2024-06-14 13:32:53,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-14 13:32:53,373 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 717 transitions, 12769 flow [2024-06-14 13:32:53,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:32:53,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:53,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:53,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:32:53,373 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:53,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1632023786, now seen corresponding path program 5 times [2024-06-14 13:32:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462402058] [2024-06-14 13:32:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462402058] [2024-06-14 13:32:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462402058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:32:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233631073] [2024-06-14 13:32:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:32:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:32:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:32:56,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:56,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 717 transitions, 12769 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:32:56,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:56,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:59,177 INFO L124 PetriNetUnfolderBase]: 3866/5965 cut-off events. [2024-06-14 13:32:59,177 INFO L125 PetriNetUnfolderBase]: For 1204781/1204784 co-relation queries the response was YES. [2024-06-14 13:32:59,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74164 conditions, 5965 events. 3866/5965 cut-off events. For 1204781/1204784 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34808 event pairs, 674 based on Foata normal form. 8/5970 useless extension candidates. Maximal degree in co-relation 73937. Up to 5461 conditions per place. [2024-06-14 13:32:59,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 608 selfloop transitions, 135 changer transitions 0/747 dead transitions. [2024-06-14 13:32:59,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 747 transitions, 14521 flow [2024-06-14 13:32:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:32:59,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:32:59,327 INFO L175 Difference]: Start difference. First operand has 485 places, 717 transitions, 12769 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:32:59,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 747 transitions, 14521 flow [2024-06-14 13:33:03,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 747 transitions, 14352 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:03,406 INFO L231 Difference]: Finished difference. Result has 488 places, 718 transitions, 12931 flow [2024-06-14 13:33:03,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12600, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12931, PETRI_PLACES=488, PETRI_TRANSITIONS=718} [2024-06-14 13:33:03,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-14 13:33:03,407 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 718 transitions, 12931 flow [2024-06-14 13:33:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:03,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:03,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:03,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:33:03,407 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:03,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1632023662, now seen corresponding path program 4 times [2024-06-14 13:33:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:03,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80377332] [2024-06-14 13:33:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:03,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80377332] [2024-06-14 13:33:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80377332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:08,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:08,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:33:08,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326535216] [2024-06-14 13:33:08,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:08,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:33:08,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:33:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:33:08,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:08,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 718 transitions, 12931 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:08,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:08,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:08,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:11,854 INFO L124 PetriNetUnfolderBase]: 3951/6112 cut-off events. [2024-06-14 13:33:11,855 INFO L125 PetriNetUnfolderBase]: For 1229205/1229210 co-relation queries the response was YES. [2024-06-14 13:33:11,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76829 conditions, 6112 events. 3951/6112 cut-off events. For 1229205/1229210 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 35944 event pairs, 667 based on Foata normal form. 6/6116 useless extension candidates. Maximal degree in co-relation 76600. Up to 5679 conditions per place. [2024-06-14 13:33:11,972 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 680 selfloop transitions, 101 changer transitions 0/785 dead transitions. [2024-06-14 13:33:11,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 785 transitions, 15933 flow [2024-06-14 13:33:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:33:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:33:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-14 13:33:11,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 13:33:11,973 INFO L175 Difference]: Start difference. First operand has 488 places, 718 transitions, 12931 flow. Second operand 12 states and 188 transitions. [2024-06-14 13:33:11,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 785 transitions, 15933 flow [2024-06-14 13:33:16,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 785 transitions, 15626 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:16,839 INFO L231 Difference]: Finished difference. Result has 497 places, 744 transitions, 13790 flow [2024-06-14 13:33:16,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12640, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13790, PETRI_PLACES=497, PETRI_TRANSITIONS=744} [2024-06-14 13:33:16,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 13:33:16,840 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 744 transitions, 13790 flow [2024-06-14 13:33:16,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:16,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:16,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:16,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:33:16,840 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:16,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1625828126, now seen corresponding path program 6 times [2024-06-14 13:33:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:16,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580690111] [2024-06-14 13:33:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:16,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:20,249 INFO 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 13:33:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580690111] [2024-06-14 13:33:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580690111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:33:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942371050] [2024-06-14 13:33:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:33:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:33:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:33:20,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:20,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 744 transitions, 13790 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:20,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:20,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:20,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:23,230 INFO L124 PetriNetUnfolderBase]: 4050/6267 cut-off events. [2024-06-14 13:33:23,230 INFO L125 PetriNetUnfolderBase]: For 1380173/1380178 co-relation queries the response was YES. [2024-06-14 13:33:23,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81628 conditions, 6267 events. 4050/6267 cut-off events. For 1380173/1380178 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37043 event pairs, 665 based on Foata normal form. 10/6275 useless extension candidates. Maximal degree in co-relation 81394. Up to 5174 conditions per place. [2024-06-14 13:33:23,358 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 710 selfloop transitions, 74 changer transitions 0/788 dead transitions. [2024-06-14 13:33:23,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 788 transitions, 16396 flow [2024-06-14 13:33:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:33:23,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:33:23,360 INFO L175 Difference]: Start difference. First operand has 497 places, 744 transitions, 13790 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:33:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 788 transitions, 16396 flow [2024-06-14 13:33:28,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 788 transitions, 16061 flow, removed 153 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:28,964 INFO L231 Difference]: Finished difference. Result has 503 places, 747 transitions, 13812 flow [2024-06-14 13:33:28,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13455, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13812, PETRI_PLACES=503, PETRI_TRANSITIONS=747} [2024-06-14 13:33:28,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 13:33:28,965 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 747 transitions, 13812 flow [2024-06-14 13:33:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:28,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:28,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:28,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:33:28,966 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:28,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1625559015, now seen corresponding path program 1 times [2024-06-14 13:33:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634747525] [2024-06-14 13:33:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:31,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634747525] [2024-06-14 13:33:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634747525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:31,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:33:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471323359] [2024-06-14 13:33:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:33:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:33:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:33:31,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:31,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 747 transitions, 13812 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:31,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:31,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:35,073 INFO L124 PetriNetUnfolderBase]: 4181/6468 cut-off events. [2024-06-14 13:33:35,074 INFO L125 PetriNetUnfolderBase]: For 1481459/1481464 co-relation queries the response was YES. [2024-06-14 13:33:35,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85310 conditions, 6468 events. 4181/6468 cut-off events. For 1481459/1481464 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 38432 event pairs, 688 based on Foata normal form. 12/6478 useless extension candidates. Maximal degree in co-relation 85073. Up to 5647 conditions per place. [2024-06-14 13:33:35,207 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 684 selfloop transitions, 110 changer transitions 0/798 dead transitions. [2024-06-14 13:33:35,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 798 transitions, 16252 flow [2024-06-14 13:33:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 13:33:35,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-14 13:33:35,209 INFO L175 Difference]: Start difference. First operand has 503 places, 747 transitions, 13812 flow. Second operand 10 states and 169 transitions. [2024-06-14 13:33:35,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 798 transitions, 16252 flow [2024-06-14 13:33:41,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 798 transitions, 16147 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:41,258 INFO L231 Difference]: Finished difference. Result has 511 places, 755 transitions, 14202 flow [2024-06-14 13:33:41,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13707, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14202, PETRI_PLACES=511, PETRI_TRANSITIONS=755} [2024-06-14 13:33:41,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-14 13:33:41,259 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 755 transitions, 14202 flow [2024-06-14 13:33:41,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:41,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:41,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:41,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:33:41,260 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:41,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:41,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1625559356, now seen corresponding path program 7 times [2024-06-14 13:33:41,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622415542] [2024-06-14 13:33:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:44,338 INFO 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 13:33:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622415542] [2024-06-14 13:33:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622415542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:33:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414144536] [2024-06-14 13:33:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:33:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:33:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:33:44,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:44,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 755 transitions, 14202 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:33:44,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:44,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:47,550 INFO L124 PetriNetUnfolderBase]: 4247/6570 cut-off events. [2024-06-14 13:33:47,551 INFO L125 PetriNetUnfolderBase]: For 1550390/1550393 co-relation queries the response was YES. [2024-06-14 13:33:47,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88703 conditions, 6570 events. 4247/6570 cut-off events. For 1550390/1550393 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 38929 event pairs, 641 based on Foata normal form. 6/6573 useless extension candidates. Maximal degree in co-relation 88462. Up to 4904 conditions per place. [2024-06-14 13:33:47,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 632 selfloop transitions, 158 changer transitions 0/794 dead transitions. [2024-06-14 13:33:47,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 794 transitions, 16590 flow [2024-06-14 13:33:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:33:47,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:33:47,695 INFO L175 Difference]: Start difference. First operand has 511 places, 755 transitions, 14202 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:33:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 794 transitions, 16590 flow Killed by 15