./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/safe019_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/safe019_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_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 13:21:38,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:21:38,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:21:38,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:21:38,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:21:38,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:21:38,873 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:21:38,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:21:38,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:21:38,877 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:21:38,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:21:38,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:21:38,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:21:38,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:21:38,879 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:21:38,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:21:38,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:21:38,880 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:21:38,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:21:38,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:21:38,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:21:38,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:21:38,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:21:38,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:21:38,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:21:38,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:21:38,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:21:38,883 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:21:38,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:21:38,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:21:38,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:21:38,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:21:38,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:21:38,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:21:38,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:21:38,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:21:38,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:21:38,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:21:38,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:21:38,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:21:38,886 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:21:38,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:21:38,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:21:38,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:21:39,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:21:39,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:21:39,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:21:39,127 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:21:39,128 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:21:39,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-14 13:21:40,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:21:40,369 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:21:40,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-14 13:21:40,389 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd103d8c/8b2adab66ad04563a7a5e305c7ff2102/FLAG385b5862d [2024-06-14 13:21:40,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd103d8c/8b2adab66ad04563a7a5e305c7ff2102 [2024-06-14 13:21:40,401 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:21:40,402 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:21:40,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_power.opt.yml/witness.yml [2024-06-14 13:21:40,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:21:40,630 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:21:40,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:21:40,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:21:40,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:21:40,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:21:40" (1/2) ... [2024-06-14 13:21:40,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231501a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:21:40, skipping insertion in model container [2024-06-14 13:21:40,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:21:40" (1/2) ... [2024-06-14 13:21:40,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a503f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:21:40, skipping insertion in model container [2024-06-14 13:21:40,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:40" (2/2) ... [2024-06-14 13:21:40,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231501a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:21:40, skipping insertion in model container [2024-06-14 13:21:40,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:40" (2/2) ... [2024-06-14 13:21:40,639 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:21:40,793 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:21:40,794 INFO L97 edCorrectnessWitness]: Location invariant before [L890-L890] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! 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 || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-14 13:21:40,794 INFO L97 edCorrectnessWitness]: Location invariant before [L885-L885] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$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$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-14 13:21:40,795 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! 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 || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-14 13:21:40,795 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$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$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-14 13:21:40,795 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:21:40,796 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] multithreaded = 1; [2024-06-14 13:21:40,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:21:41,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:21:41,252 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:21:41,419 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:21:41,454 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:21:41,454 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:21:41 WrapperNode [2024-06-14 13:21:41,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:21:41,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:21:41,455 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:21:41,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:21:41,461 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,477 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,514 INFO L138 Inliner]: procedures = 176, calls = 105, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 289 [2024-06-14 13:21:41,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:21:41,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:21:41,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:21:41,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:21:41,538 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,539 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,543 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,561 INFO L175 MemorySlicer]: Split 58 memory accesses to 2 slices as follows [2, 56]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-14 13:21:41,561 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,562 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,575 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,577 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,580 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,582 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:21:41,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:21:41,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:21:41,587 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:21:41,587 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 01:21:41" (1/1) ... [2024-06-14 13:21:41,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:21:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:21:41,609 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 13:21:41,620 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 13:21:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:21:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:21:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:21:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:21:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:21:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:21:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:21:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:21:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:21:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:21:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:21:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:21:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:21:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:21:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:21:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:21:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:21:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:21:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:21:41,642 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 13:21:41,804 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:21:41,805 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:21:42,411 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:21:42,411 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:21:42,827 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:21:42,827 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:21:42,827 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:21:42 BoogieIcfgContainer [2024-06-14 13:21:42,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:21:42,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:21:42,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:21:42,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:21:42,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:21:40" (1/4) ... [2024-06-14 13:21:42,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6660e2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:21:42, skipping insertion in model container [2024-06-14 13:21:42,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:40" (2/4) ... [2024-06-14 13:21:42,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6660e2f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:21:42, skipping insertion in model container [2024-06-14 13:21:42,835 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 01:21:41" (3/4) ... [2024-06-14 13:21:42,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6660e2f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:21:42, skipping insertion in model container [2024-06-14 13:21:42,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:21:42" (4/4) ... [2024-06-14 13:21:42,836 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-06-14 13:21:42,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:21:42,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:21:42,854 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:21:42,927 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:21:42,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:21:43,039 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:21:43,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:21:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:21:43,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:21:43,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:21:43,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:21:43,113 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;@33421afc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:21:43,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:21:43,119 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:21:43,120 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:21:43,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:21:43,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:43,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:21:43,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:43,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 675115527, now seen corresponding path program 1 times [2024-06-14 13:21:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939504407] [2024-06-14 13:21:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:43,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:45,104 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 13:21:45,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939504407] [2024-06-14 13:21:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939504407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:45,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:45,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:21:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013144863] [2024-06-14 13:21:45,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:21:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:21:45,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:21:45,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:47,195 INFO L124 PetriNetUnfolderBase]: 6711/9235 cut-off events. [2024-06-14 13:21:47,195 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-06-14 13:21:47,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18757 conditions, 9235 events. 6711/9235 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48200 event pairs, 4089 based on Foata normal form. 2/9093 useless extension candidates. Maximal degree in co-relation 18741. Up to 9183 conditions per place. [2024-06-14 13:21:47,238 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-14 13:21:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 253 flow [2024-06-14 13:21:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:21:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:21:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-14 13:21:47,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559748427672956 [2024-06-14 13:21:47,248 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 89 transitions. [2024-06-14 13:21:47,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 253 flow [2024-06-14 13:21:47,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:47,253 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:21:47,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:21:47,257 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:21:47,257 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:21:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:47,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:47,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:21:47,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:47,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:47,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1876743057, now seen corresponding path program 1 times [2024-06-14 13:21:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:47,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133186580] [2024-06-14 13:21:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:50,145 INFO 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 13:21:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133186580] [2024-06-14 13:21:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133186580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:50,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:50,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:21:50,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535793948] [2024-06-14 13:21:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:50,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:21:50,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:21:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:21:50,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:21:50,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 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 13:21:50,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:50,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:21:50,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:52,716 INFO L124 PetriNetUnfolderBase]: 8525/11671 cut-off events. [2024-06-14 13:21:52,717 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-14 13:21:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26845 conditions, 11671 events. 8525/11671 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59753 event pairs, 4020 based on Foata normal form. 8/11672 useless extension candidates. Maximal degree in co-relation 26830. Up to 11534 conditions per place. [2024-06-14 13:21:52,773 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-14 13:21:52,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 339 flow [2024-06-14 13:21:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:21:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:21:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 13:21:52,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-14 13:21:52,776 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 109 transitions. [2024-06-14 13:21:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 339 flow [2024-06-14 13:21:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:21:52,779 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 168 flow [2024-06-14 13:21:52,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-14 13:21:52,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2024-06-14 13:21:52,780 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 168 flow [2024-06-14 13:21:52,780 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 13:21:52,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:52,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:21:52,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1262577522, now seen corresponding path program 1 times [2024-06-14 13:21:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:52,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610450040] [2024-06-14 13:21:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:54,506 INFO 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 13:21:54,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610450040] [2024-06-14 13:21:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610450040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:54,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:21:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931743699] [2024-06-14 13:21:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:54,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:21:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:21:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:21:54,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:54,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:54,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:54,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:54,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:56,390 INFO L124 PetriNetUnfolderBase]: 6713/9256 cut-off events. [2024-06-14 13:21:56,390 INFO L125 PetriNetUnfolderBase]: For 4637/4637 co-relation queries the response was YES. [2024-06-14 13:21:56,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 9256 events. 6713/9256 cut-off events. For 4637/4637 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48549 event pairs, 3676 based on Foata normal form. 6/9259 useless extension candidates. Maximal degree in co-relation 23385. Up to 9173 conditions per place. [2024-06-14 13:21:56,429 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 13:21:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 410 flow [2024-06-14 13:21:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:21:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:21:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:21:56,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:21:56,431 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 168 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:21:56,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 410 flow [2024-06-14 13:21:56,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:21:56,434 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 234 flow [2024-06-14 13:21:56,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 13:21:56,435 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-14 13:21:56,435 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 234 flow [2024-06-14 13:21:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:56,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:56,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:56,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:21:56,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:56,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:56,436 INFO L85 PathProgramCache]: Analyzing trace with hash 485199012, now seen corresponding path program 1 times [2024-06-14 13:21:56,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:56,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389653817] [2024-06-14 13:21:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:56,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:58,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389653817] [2024-06-14 13:21:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389653817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:21:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478462658] [2024-06-14 13:21:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:21:58,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:58,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:21:58,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:21:58,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:58,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:58,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:58,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:58,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:00,960 INFO L124 PetriNetUnfolderBase]: 6704/9244 cut-off events. [2024-06-14 13:22:00,960 INFO L125 PetriNetUnfolderBase]: For 9305/9305 co-relation queries the response was YES. [2024-06-14 13:22:00,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26564 conditions, 9244 events. 6704/9244 cut-off events. For 9305/9305 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48494 event pairs, 3546 based on Foata normal form. 3/9244 useless extension candidates. Maximal degree in co-relation 26544. Up to 9161 conditions per place. [2024-06-14 13:22:01,187 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 76 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-14 13:22:01,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 96 transitions, 539 flow [2024-06-14 13:22:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:22:01,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:22:01,192 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 234 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:22:01,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 96 transitions, 539 flow [2024-06-14 13:22:01,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 508 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:01,198 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 310 flow [2024-06-14 13:22:01,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-14 13:22:01,199 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-14 13:22:01,199 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 310 flow [2024-06-14 13:22:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:01,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:01,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:01,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:22:01,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:01,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:01,201 INFO L85 PathProgramCache]: Analyzing trace with hash -698005527, now seen corresponding path program 1 times [2024-06-14 13:22:01,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:01,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936724974] [2024-06-14 13:22:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:01,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:03,568 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 13:22:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936724974] [2024-06-14 13:22:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936724974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:03,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:03,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829198511] [2024-06-14 13:22:03,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:03,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:03,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:03,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:05,744 INFO L124 PetriNetUnfolderBase]: 6689/9223 cut-off events. [2024-06-14 13:22:05,744 INFO L125 PetriNetUnfolderBase]: For 14523/14523 co-relation queries the response was YES. [2024-06-14 13:22:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29006 conditions, 9223 events. 6689/9223 cut-off events. For 14523/14523 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48140 event pairs, 3407 based on Foata normal form. 6/9226 useless extension candidates. Maximal degree in co-relation 28983. Up to 9102 conditions per place. [2024-06-14 13:22:05,823 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 86 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-14 13:22:05,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 109 transitions, 642 flow [2024-06-14 13:22:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:22:05,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-14 13:22:05,832 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 310 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:22:05,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 109 transitions, 642 flow [2024-06-14 13:22:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 619 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:05,839 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 363 flow [2024-06-14 13:22:05,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-06-14 13:22:05,841 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:22:05,841 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 363 flow [2024-06-14 13:22:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:05,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:22:05,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:05,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash -84757721, now seen corresponding path program 1 times [2024-06-14 13:22:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:05,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836667160] [2024-06-14 13:22:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:07,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836667160] [2024-06-14 13:22:07,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836667160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:07,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849242533] [2024-06-14 13:22:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:08,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:08,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:22:08,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:08,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:08,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:10,314 INFO L124 PetriNetUnfolderBase]: 8477/11616 cut-off events. [2024-06-14 13:22:10,315 INFO L125 PetriNetUnfolderBase]: For 24780/24780 co-relation queries the response was YES. [2024-06-14 13:22:10,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38174 conditions, 11616 events. 8477/11616 cut-off events. For 24780/24780 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59283 event pairs, 3922 based on Foata normal form. 3/11612 useless extension candidates. Maximal degree in co-relation 38149. Up to 11437 conditions per place. [2024-06-14 13:22:10,373 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 71 selfloop transitions, 20 changer transitions 0/96 dead transitions. [2024-06-14 13:22:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 637 flow [2024-06-14 13:22:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:22:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:22:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:22:10,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-14 13:22:10,375 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 363 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:22:10,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 637 flow [2024-06-14 13:22:10,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 587 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:10,390 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 414 flow [2024-06-14 13:22:10,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 13:22:10,392 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:22:10,392 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 414 flow [2024-06-14 13:22:10,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:22:10,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:10,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:10,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:22:10,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:10,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:10,394 INFO L85 PathProgramCache]: Analyzing trace with hash -609406489, now seen corresponding path program 1 times [2024-06-14 13:22:10,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:10,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599063185] [2024-06-14 13:22:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:13,194 INFO 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 13:22:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599063185] [2024-06-14 13:22:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599063185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:13,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:13,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:13,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152460685] [2024-06-14 13:22:13,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:13,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:13,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:13,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:13,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 414 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:13,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:13,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:13,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:15,827 INFO L124 PetriNetUnfolderBase]: 8504/11663 cut-off events. [2024-06-14 13:22:15,828 INFO L125 PetriNetUnfolderBase]: For 34295/34295 co-relation queries the response was YES. [2024-06-14 13:22:15,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41125 conditions, 11663 events. 8504/11663 cut-off events. For 34295/34295 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59699 event pairs, 3792 based on Foata normal form. 3/11659 useless extension candidates. Maximal degree in co-relation 41099. Up to 11397 conditions per place. [2024-06-14 13:22:15,876 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-14 13:22:15,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 746 flow [2024-06-14 13:22:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:22:15,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 13:22:15,878 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 414 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:22:15,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 746 flow [2024-06-14 13:22:15,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 681 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:15,898 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 470 flow [2024-06-14 13:22:15,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:22:15,898 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:22:15,899 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 470 flow [2024-06-14 13:22:15,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:15,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:15,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:22:15,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:15,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1671204089, now seen corresponding path program 2 times [2024-06-14 13:22:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715325449] [2024-06-14 13:22:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715325449] [2024-06-14 13:22:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715325449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:18,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919036525] [2024-06-14 13:22:18,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:18,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:18,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 470 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:18,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:18,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:18,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:21,380 INFO L124 PetriNetUnfolderBase]: 8522/11696 cut-off events. [2024-06-14 13:22:21,381 INFO L125 PetriNetUnfolderBase]: For 35193/35201 co-relation queries the response was YES. [2024-06-14 13:22:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41394 conditions, 11696 events. 8522/11696 cut-off events. For 35193/35201 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 60269 event pairs, 3779 based on Foata normal form. 9/11701 useless extension candidates. Maximal degree in co-relation 41367. Up to 11459 conditions per place. [2024-06-14 13:22:21,440 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 105 selfloop transitions, 26 changer transitions 0/136 dead transitions. [2024-06-14 13:22:21,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 946 flow [2024-06-14 13:22:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:22:21,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363207547169811 [2024-06-14 13:22:21,443 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 470 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:22:21,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 946 flow [2024-06-14 13:22:21,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 136 transitions, 839 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:21,466 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 540 flow [2024-06-14 13:22:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=540, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-14 13:22:21,467 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-14 13:22:21,467 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 540 flow [2024-06-14 13:22:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:21,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:21,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:21,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:22:21,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:21,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1304386223, now seen corresponding path program 1 times [2024-06-14 13:22:21,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:21,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292637819] [2024-06-14 13:22:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:23,614 INFO 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 13:22:23,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:23,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292637819] [2024-06-14 13:22:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292637819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:22:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526679097] [2024-06-14 13:22:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:22:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:22:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:22:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:23,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:23,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:23,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:23,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:25,805 INFO L124 PetriNetUnfolderBase]: 6711/9255 cut-off events. [2024-06-14 13:22:25,806 INFO L125 PetriNetUnfolderBase]: For 30342/30342 co-relation queries the response was YES. [2024-06-14 13:22:25,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34296 conditions, 9255 events. 6711/9255 cut-off events. For 30342/30342 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48214 event pairs, 3242 based on Foata normal form. 4/9253 useless extension candidates. Maximal degree in co-relation 34267. Up to 9155 conditions per place. [2024-06-14 13:22:25,850 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 88 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-06-14 13:22:25,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 826 flow [2024-06-14 13:22:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:22:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:22:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 13:22:25,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2024-06-14 13:22:25,851 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 540 flow. Second operand 5 states and 116 transitions. [2024-06-14 13:22:25,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 826 flow [2024-06-14 13:22:25,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 741 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:25,863 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 531 flow [2024-06-14 13:22:25,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2024-06-14 13:22:25,864 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-14 13:22:25,864 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 531 flow [2024-06-14 13:22:25,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:25,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:25,865 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 13:22:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:22:25,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:25,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1515707190, now seen corresponding path program 1 times [2024-06-14 13:22:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:25,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805761400] [2024-06-14 13:22:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:27,878 INFO 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 13:22:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805761400] [2024-06-14 13:22:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805761400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:27,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:27,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704809425] [2024-06-14 13:22:27,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:27,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:27,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:27,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 531 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:27,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:27,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:27,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:30,471 INFO L124 PetriNetUnfolderBase]: 8545/11725 cut-off events. [2024-06-14 13:22:30,471 INFO L125 PetriNetUnfolderBase]: For 45434/45434 co-relation queries the response was YES. [2024-06-14 13:22:30,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44764 conditions, 11725 events. 8545/11725 cut-off events. For 45434/45434 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59997 event pairs, 2872 based on Foata normal form. 6/11724 useless extension candidates. Maximal degree in co-relation 44735. Up to 11520 conditions per place. [2024-06-14 13:22:30,530 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 105 selfloop transitions, 15 changer transitions 0/125 dead transitions. [2024-06-14 13:22:30,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 887 flow [2024-06-14 13:22:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 13:22:30,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2024-06-14 13:22:30,532 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 531 flow. Second operand 6 states and 139 transitions. [2024-06-14 13:22:30,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 887 flow [2024-06-14 13:22:30,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 845 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:30,555 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 569 flow [2024-06-14 13:22:30,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-14 13:22:30,556 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 13:22:30,556 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 569 flow [2024-06-14 13:22:30,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:30,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:30,557 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 13:22:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:22:30,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:30,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1711735410, now seen corresponding path program 2 times [2024-06-14 13:22:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429798700] [2024-06-14 13:22:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:32,684 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 13:22:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429798700] [2024-06-14 13:22:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429798700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:32,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:32,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268110452] [2024-06-14 13:22:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:32,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:32,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 569 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:32,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:32,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:32,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:35,092 INFO L124 PetriNetUnfolderBase]: 8530/11704 cut-off events. [2024-06-14 13:22:35,093 INFO L125 PetriNetUnfolderBase]: For 55524/55524 co-relation queries the response was YES. [2024-06-14 13:22:35,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46845 conditions, 11704 events. 8530/11704 cut-off events. For 55524/55524 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59716 event pairs, 3478 based on Foata normal form. 6/11703 useless extension candidates. Maximal degree in co-relation 46815. Up to 11467 conditions per place. [2024-06-14 13:22:35,161 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 100 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2024-06-14 13:22:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 937 flow [2024-06-14 13:22:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:22:35,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-14 13:22:35,164 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 569 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:22:35,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 937 flow [2024-06-14 13:22:35,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 883 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:35,195 INFO L231 Difference]: Finished difference. Result has 83 places, 94 transitions, 618 flow [2024-06-14 13:22:35,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=83, PETRI_TRANSITIONS=94} [2024-06-14 13:22:35,195 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-14 13:22:35,195 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 94 transitions, 618 flow [2024-06-14 13:22:35,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:35,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:35,196 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 13:22:35,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:22:35,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1711730450, now seen corresponding path program 1 times [2024-06-14 13:22:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:35,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64426851] [2024-06-14 13:22:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:37,929 INFO 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 13:22:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64426851] [2024-06-14 13:22:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64426851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:37,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:37,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132006213] [2024-06-14 13:22:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 94 transitions, 618 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:40,699 INFO L124 PetriNetUnfolderBase]: 8686/11960 cut-off events. [2024-06-14 13:22:40,699 INFO L125 PetriNetUnfolderBase]: For 70925/70925 co-relation queries the response was YES. [2024-06-14 13:22:40,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50212 conditions, 11960 events. 8686/11960 cut-off events. For 70925/70925 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61466 event pairs, 3123 based on Foata normal form. 24/11977 useless extension candidates. Maximal degree in co-relation 50181. Up to 11415 conditions per place. [2024-06-14 13:22:40,765 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 30 changer transitions 0/144 dead transitions. [2024-06-14 13:22:40,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 1062 flow [2024-06-14 13:22:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:22:40,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:22:40,767 INFO L175 Difference]: Start difference. First operand has 83 places, 94 transitions, 618 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:22:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 1062 flow [2024-06-14 13:22:40,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 987 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:40,804 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 659 flow [2024-06-14 13:22:40,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=659, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-14 13:22:40,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-14 13:22:40,805 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 659 flow [2024-06-14 13:22:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:40,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:40,805 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 13:22:40,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:22:40,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:40,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 267727242, now seen corresponding path program 2 times [2024-06-14 13:22:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:40,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451487906] [2024-06-14 13:22:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:40,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451487906] [2024-06-14 13:22:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451487906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:43,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:43,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287419117] [2024-06-14 13:22:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:43,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:43,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:43,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:43,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 659 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:43,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:43,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:43,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:46,589 INFO L124 PetriNetUnfolderBase]: 8949/12361 cut-off events. [2024-06-14 13:22:46,589 INFO L125 PetriNetUnfolderBase]: For 86930/86930 co-relation queries the response was YES. [2024-06-14 13:22:46,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54183 conditions, 12361 events. 8949/12361 cut-off events. For 86930/86930 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 64324 event pairs, 3167 based on Foata normal form. 18/12372 useless extension candidates. Maximal degree in co-relation 54151. Up to 11349 conditions per place. [2024-06-14 13:22:46,654 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 114 selfloop transitions, 44 changer transitions 0/163 dead transitions. [2024-06-14 13:22:46,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 163 transitions, 1289 flow [2024-06-14 13:22:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:22:46,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-14 13:22:46,656 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 659 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:22:46,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 163 transitions, 1289 flow [2024-06-14 13:22:46,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 163 transitions, 1217 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:46,716 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 772 flow [2024-06-14 13:22:46,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=772, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-14 13:22:46,718 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-14 13:22:46,718 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 772 flow [2024-06-14 13:22:46,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:46,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:46,718 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 13:22:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:22:46,719 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash 267720732, now seen corresponding path program 3 times [2024-06-14 13:22:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498675133] [2024-06-14 13:22:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:49,805 INFO 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 13:22:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:49,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498675133] [2024-06-14 13:22:49,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498675133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:49,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:49,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:49,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052650893] [2024-06-14 13:22:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:49,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:49,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:49,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 772 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:49,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:49,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:49,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:52,868 INFO L124 PetriNetUnfolderBase]: 9149/12669 cut-off events. [2024-06-14 13:22:52,868 INFO L125 PetriNetUnfolderBase]: For 103413/103421 co-relation queries the response was YES. [2024-06-14 13:22:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57368 conditions, 12669 events. 9149/12669 cut-off events. For 103413/103421 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 66453 event pairs, 3540 based on Foata normal form. 30/12695 useless extension candidates. Maximal degree in co-relation 57335. Up to 12182 conditions per place. [2024-06-14 13:22:52,953 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 134 selfloop transitions, 31 changer transitions 0/170 dead transitions. [2024-06-14 13:22:52,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1330 flow [2024-06-14 13:22:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:22:52,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-14 13:22:52,955 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 772 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:22:52,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1330 flow [2024-06-14 13:22:53,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 170 transitions, 1269 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:53,058 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 855 flow [2024-06-14 13:22:53,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-14 13:22:53,058 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 13:22:53,058 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 855 flow [2024-06-14 13:22:53,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:53,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:53,059 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 13:22:53,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:22:53,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:53,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash 267547752, now seen corresponding path program 4 times [2024-06-14 13:22:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:53,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972746269] [2024-06-14 13:22:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:56,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:56,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972746269] [2024-06-14 13:22:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972746269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:56,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963483124] [2024-06-14 13:22:56,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:22:56,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 855 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:56,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:56,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:22:56,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:59,099 INFO L124 PetriNetUnfolderBase]: 9207/12763 cut-off events. [2024-06-14 13:22:59,099 INFO L125 PetriNetUnfolderBase]: For 114586/114594 co-relation queries the response was YES. [2024-06-14 13:22:59,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58646 conditions, 12763 events. 9207/12763 cut-off events. For 114586/114594 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67014 event pairs, 3546 based on Foata normal form. 48/12807 useless extension candidates. Maximal degree in co-relation 58611. Up to 12199 conditions per place. [2024-06-14 13:22:59,169 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 24 changer transitions 0/162 dead transitions. [2024-06-14 13:22:59,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 162 transitions, 1361 flow [2024-06-14 13:22:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:22:59,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386792452830189 [2024-06-14 13:22:59,173 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 855 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:22:59,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 162 transitions, 1361 flow [2024-06-14 13:22:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 162 transitions, 1275 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:59,308 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 882 flow [2024-06-14 13:22:59,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=882, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-14 13:22:59,309 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 13:22:59,309 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 882 flow [2024-06-14 13:22:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:59,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:59,310 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 13:22:59,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:22:59,310 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1760708700, now seen corresponding path program 1 times [2024-06-14 13:22:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:59,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626274534] [2024-06-14 13:22:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:01,744 INFO 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 13:23:01,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626274534] [2024-06-14 13:23:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626274534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:01,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:01,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922156727] [2024-06-14 13:23:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:01,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:23:01,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 882 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:01,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:01,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:23:01,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:04,497 INFO L124 PetriNetUnfolderBase]: 9233/12794 cut-off events. [2024-06-14 13:23:04,497 INFO L125 PetriNetUnfolderBase]: For 123579/123579 co-relation queries the response was YES. [2024-06-14 13:23:04,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59854 conditions, 12794 events. 9233/12794 cut-off events. For 123579/123579 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67177 event pairs, 3509 based on Foata normal form. 8/12800 useless extension candidates. Maximal degree in co-relation 59818. Up to 12617 conditions per place. [2024-06-14 13:23:04,570 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 132 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-14 13:23:04,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 157 transitions, 1450 flow [2024-06-14 13:23:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:23:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:23:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 13:23:04,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2024-06-14 13:23:04,572 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 882 flow. Second operand 6 states and 139 transitions. [2024-06-14 13:23:04,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 157 transitions, 1450 flow [2024-06-14 13:23:04,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 157 transitions, 1365 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:04,664 INFO L231 Difference]: Finished difference. Result has 96 places, 125 transitions, 1015 flow [2024-06-14 13:23:04,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1015, PETRI_PLACES=96, PETRI_TRANSITIONS=125} [2024-06-14 13:23:04,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-14 13:23:04,666 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 125 transitions, 1015 flow [2024-06-14 13:23:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:04,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:04,666 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 13:23:04,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:23:04,666 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:04,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash -602950852, now seen corresponding path program 1 times [2024-06-14 13:23:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005807527] [2024-06-14 13:23:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:07,449 INFO 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 13:23:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005807527] [2024-06-14 13:23:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005807527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:07,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:07,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821718648] [2024-06-14 13:23:07,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:07,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:07,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:23:07,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 125 transitions, 1015 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:07,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:07,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:23:07,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:10,514 INFO L124 PetriNetUnfolderBase]: 9345/12961 cut-off events. [2024-06-14 13:23:10,514 INFO L125 PetriNetUnfolderBase]: For 145571/145571 co-relation queries the response was YES. [2024-06-14 13:23:10,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64639 conditions, 12961 events. 9345/12961 cut-off events. For 145571/145571 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67804 event pairs, 2659 based on Foata normal form. 18/12972 useless extension candidates. Maximal degree in co-relation 64601. Up to 12592 conditions per place. [2024-06-14 13:23:10,607 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 149 selfloop transitions, 19 changer transitions 0/173 dead transitions. [2024-06-14 13:23:10,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 173 transitions, 1522 flow [2024-06-14 13:23:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:23:10,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366576819407008 [2024-06-14 13:23:10,610 INFO L175 Difference]: Start difference. First operand has 96 places, 125 transitions, 1015 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:23:10,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 173 transitions, 1522 flow [2024-06-14 13:23:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1490 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-14 13:23:10,763 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1088 flow [2024-06-14 13:23:10,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1088, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-14 13:23:10,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 13:23:10,763 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1088 flow [2024-06-14 13:23:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:10,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:10,764 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 13:23:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:23:10,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:10,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1524188664, now seen corresponding path program 2 times [2024-06-14 13:23:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713439462] [2024-06-14 13:23:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:13,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713439462] [2024-06-14 13:23:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713439462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032322532] [2024-06-14 13:23:13,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:13,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:13,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:23:13,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1088 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:13,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:13,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:23:13,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:16,406 INFO L124 PetriNetUnfolderBase]: 9306/12904 cut-off events. [2024-06-14 13:23:16,406 INFO L125 PetriNetUnfolderBase]: For 160439/160439 co-relation queries the response was YES. [2024-06-14 13:23:16,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65712 conditions, 12904 events. 9306/12904 cut-off events. For 160439/160439 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67571 event pairs, 3448 based on Foata normal form. 18/12915 useless extension candidates. Maximal degree in co-relation 65671. Up to 12532 conditions per place. [2024-06-14 13:23:16,494 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 145 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2024-06-14 13:23:16,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 174 transitions, 1575 flow [2024-06-14 13:23:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:23:16,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2024-06-14 13:23:16,497 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1088 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:23:16,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 174 transitions, 1575 flow [2024-06-14 13:23:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1498 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:16,640 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1100 flow [2024-06-14 13:23:16,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-14 13:23:16,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-14 13:23:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1100 flow [2024-06-14 13:23:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:16,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:16,642 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 13:23:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:23:16,642 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:16,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash 610609904, now seen corresponding path program 1 times [2024-06-14 13:23:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198282212] [2024-06-14 13:23:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:19,484 INFO 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 13:23:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198282212] [2024-06-14 13:23:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198282212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:19,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018876787] [2024-06-14 13:23:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:19,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:19,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:19,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:19,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:19,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:22,087 INFO L124 PetriNetUnfolderBase]: 8897/12499 cut-off events. [2024-06-14 13:23:22,087 INFO L125 PetriNetUnfolderBase]: For 180959/180959 co-relation queries the response was YES. [2024-06-14 13:23:22,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65527 conditions, 12499 events. 8897/12499 cut-off events. For 180959/180959 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66799 event pairs, 3391 based on Foata normal form. 6/12501 useless extension candidates. Maximal degree in co-relation 65485. Up to 12172 conditions per place. [2024-06-14 13:23:22,173 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 131 selfloop transitions, 20 changer transitions 0/160 dead transitions. [2024-06-14 13:23:22,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1534 flow [2024-06-14 13:23:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:23:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:23:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:23:22,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 13:23:22,175 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1100 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:23:22,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1534 flow [2024-06-14 13:23:22,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1441 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:22,305 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1134 flow [2024-06-14 13:23:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1134, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-14 13:23:22,305 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-14 13:23:22,305 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1134 flow [2024-06-14 13:23:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:22,306 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 13:23:22,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:23:22,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:22,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1252600994, now seen corresponding path program 2 times [2024-06-14 13:23:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235009121] [2024-06-14 13:23:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:24,926 INFO 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 13:23:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235009121] [2024-06-14 13:23:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235009121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:24,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006460550] [2024-06-14 13:23:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:24,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:24,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:24,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1134 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:24,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:24,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:24,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:28,349 INFO L124 PetriNetUnfolderBase]: 10481/14611 cut-off events. [2024-06-14 13:23:28,349 INFO L125 PetriNetUnfolderBase]: For 230850/230850 co-relation queries the response was YES. [2024-06-14 13:23:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80936 conditions, 14611 events. 10481/14611 cut-off events. For 230850/230850 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 77574 event pairs, 3394 based on Foata normal form. 6/14610 useless extension candidates. Maximal degree in co-relation 80893. Up to 12813 conditions per place. [2024-06-14 13:23:28,451 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 130 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2024-06-14 13:23:28,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 1848 flow [2024-06-14 13:23:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:23:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:23:28,453 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1134 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:23:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 1848 flow [2024-06-14 13:23:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 186 transitions, 1759 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:28,657 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1385 flow [2024-06-14 13:23:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1385, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2024-06-14 13:23:28,657 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-14 13:23:28,658 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1385 flow [2024-06-14 13:23:28,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:28,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:28,659 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 13:23:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:23:28,660 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:28,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 241675267, now seen corresponding path program 1 times [2024-06-14 13:23:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114701857] [2024-06-14 13:23:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114701857] [2024-06-14 13:23:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114701857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:31,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:23:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888581651] [2024-06-14 13:23:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:23:31,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:23:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:23:31,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:23:31,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1385 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:23:31,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:31,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:23:31,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:35,193 INFO L124 PetriNetUnfolderBase]: 11290/15560 cut-off events. [2024-06-14 13:23:35,193 INFO L125 PetriNetUnfolderBase]: For 269626/269626 co-relation queries the response was YES. [2024-06-14 13:23:35,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94554 conditions, 15560 events. 11290/15560 cut-off events. For 269626/269626 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 82251 event pairs, 3809 based on Foata normal form. 16/15569 useless extension candidates. Maximal degree in co-relation 94509. Up to 15048 conditions per place. [2024-06-14 13:23:35,297 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2024-06-14 13:23:35,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 2182 flow [2024-06-14 13:23:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:23:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41037735849056606 [2024-06-14 13:23:35,301 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1385 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:23:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 2182 flow [2024-06-14 13:23:35,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 2107 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 13:23:35,552 INFO L231 Difference]: Finished difference. Result has 116 places, 163 transitions, 1666 flow [2024-06-14 13:23:35,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1666, PETRI_PLACES=116, PETRI_TRANSITIONS=163} [2024-06-14 13:23:35,553 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-14 13:23:35,553 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 163 transitions, 1666 flow [2024-06-14 13:23:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:23:35,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:35,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:35,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:23:35,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:35,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 176129347, now seen corresponding path program 2 times [2024-06-14 13:23:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467317422] [2024-06-14 13:23:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:38,464 INFO 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 13:23:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:38,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467317422] [2024-06-14 13:23:38,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467317422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:38,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:38,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:23:38,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150574374] [2024-06-14 13:23:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:38,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:23:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:23:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:23:38,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:23:38,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 163 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:23:38,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:38,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:23:38,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:42,438 INFO L124 PetriNetUnfolderBase]: 11430/15756 cut-off events. [2024-06-14 13:23:42,438 INFO L125 PetriNetUnfolderBase]: For 301939/301939 co-relation queries the response was YES. [2024-06-14 13:23:42,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100174 conditions, 15756 events. 11430/15756 cut-off events. For 301939/301939 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 83422 event pairs, 3821 based on Foata normal form. 16/15765 useless extension candidates. Maximal degree in co-relation 100125. Up to 14916 conditions per place. [2024-06-14 13:23:42,562 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 160 selfloop transitions, 58 changer transitions 0/223 dead transitions. [2024-06-14 13:23:42,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 223 transitions, 2638 flow [2024-06-14 13:23:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:23:42,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-14 13:23:42,565 INFO L175 Difference]: Start difference. First operand has 116 places, 163 transitions, 1666 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:23:42,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 223 transitions, 2638 flow [2024-06-14 13:23:42,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2561 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:23:42,902 INFO L231 Difference]: Finished difference. Result has 122 places, 181 transitions, 2048 flow [2024-06-14 13:23:42,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2048, PETRI_PLACES=122, PETRI_TRANSITIONS=181} [2024-06-14 13:23:42,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:23:42,903 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 181 transitions, 2048 flow [2024-06-14 13:23:42,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:23:42,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:42,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:23:42,904 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:42,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1748950234, now seen corresponding path program 1 times [2024-06-14 13:23:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:42,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546929693] [2024-06-14 13:23:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:42,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:45,695 INFO 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 13:23:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546929693] [2024-06-14 13:23:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546929693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:45,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:45,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:23:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320167473] [2024-06-14 13:23:45,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:23:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:23:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:23:45,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:45,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 181 transitions, 2048 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 13:23:45,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:49,226 INFO L124 PetriNetUnfolderBase]: 10975/15275 cut-off events. [2024-06-14 13:23:49,227 INFO L125 PetriNetUnfolderBase]: For 340778/340969 co-relation queries the response was YES. [2024-06-14 13:23:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103543 conditions, 15275 events. 10975/15275 cut-off events. For 340778/340969 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 81139 event pairs, 3909 based on Foata normal form. 12/15234 useless extension candidates. Maximal degree in co-relation 103490. Up to 14804 conditions per place. [2024-06-14 13:23:49,376 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 183 selfloop transitions, 28 changer transitions 0/222 dead transitions. [2024-06-14 13:23:49,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 222 transitions, 2650 flow [2024-06-14 13:23:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:23:49,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366576819407008 [2024-06-14 13:23:49,379 INFO L175 Difference]: Start difference. First operand has 122 places, 181 transitions, 2048 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:23:49,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 222 transitions, 2650 flow [2024-06-14 13:23:49,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 222 transitions, 2560 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-14 13:23:49,776 INFO L231 Difference]: Finished difference. Result has 128 places, 186 transitions, 2127 flow [2024-06-14 13:23:49,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2127, PETRI_PLACES=128, PETRI_TRANSITIONS=186} [2024-06-14 13:23:49,777 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-14 13:23:49,777 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 186 transitions, 2127 flow [2024-06-14 13:23:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 13:23:49,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:49,777 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 13:23:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:23:49,777 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash -846542868, now seen corresponding path program 2 times [2024-06-14 13:23:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074440780] [2024-06-14 13:23:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:49,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:53,716 INFO 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 13:23:53,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074440780] [2024-06-14 13:23:53,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074440780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:53,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:53,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:23:53,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035440940] [2024-06-14 13:23:53,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:23:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:23:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:23:53,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 186 transitions, 2127 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 13:23:53,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:53,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:57,693 INFO L124 PetriNetUnfolderBase]: 11052/15379 cut-off events. [2024-06-14 13:23:57,693 INFO L125 PetriNetUnfolderBase]: For 353951/354169 co-relation queries the response was YES. [2024-06-14 13:23:57,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104418 conditions, 15379 events. 11052/15379 cut-off events. For 353951/354169 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 81862 event pairs, 3922 based on Foata normal form. 26/15346 useless extension candidates. Maximal degree in co-relation 104362. Up to 14793 conditions per place. [2024-06-14 13:23:57,841 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-14 13:23:57,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 231 transitions, 2943 flow [2024-06-14 13:23:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:23:57,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2024-06-14 13:23:57,843 INFO L175 Difference]: Start difference. First operand has 128 places, 186 transitions, 2127 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:23:57,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 231 transitions, 2943 flow [2024-06-14 13:23:58,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 231 transitions, 2818 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:58,229 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2305 flow [2024-06-14 13:23:58,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2305, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-14 13:23:58,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-14 13:23:58,230 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2305 flow [2024-06-14 13:23:58,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 13:23:58,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:58,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:58,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:23:58,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:58,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -846542713, now seen corresponding path program 1 times [2024-06-14 13:23:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:58,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314747728] [2024-06-14 13:23:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:01,460 INFO 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 13:24:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314747728] [2024-06-14 13:24:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314747728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120484203] [2024-06-14 13:24:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:01,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:01,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:24:01,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:01,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:05,253 INFO L124 PetriNetUnfolderBase]: 11870/16331 cut-off events. [2024-06-14 13:24:05,253 INFO L125 PetriNetUnfolderBase]: For 400931/400931 co-relation queries the response was YES. [2024-06-14 13:24:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112697 conditions, 16331 events. 11870/16331 cut-off events. For 400931/400931 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 85913 event pairs, 3798 based on Foata normal form. 16/16343 useless extension candidates. Maximal degree in co-relation 112639. Up to 15815 conditions per place. [2024-06-14 13:24:05,397 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 245 selfloop transitions, 37 changer transitions 0/287 dead transitions. [2024-06-14 13:24:05,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 287 transitions, 3867 flow [2024-06-14 13:24:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:24:05,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-14 13:24:05,402 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2305 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:24:05,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 287 transitions, 3867 flow [2024-06-14 13:24:05,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 287 transitions, 3668 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 13:24:05,912 INFO L231 Difference]: Finished difference. Result has 138 places, 226 transitions, 2714 flow [2024-06-14 13:24:05,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2714, PETRI_PLACES=138, PETRI_TRANSITIONS=226} [2024-06-14 13:24:05,912 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-14 13:24:05,912 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 226 transitions, 2714 flow [2024-06-14 13:24:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:24:05,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:05,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:05,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:24:05,913 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:05,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash -184144633, now seen corresponding path program 2 times [2024-06-14 13:24:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:05,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485097350] [2024-06-14 13:24:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:05,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:08,929 INFO 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 13:24:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485097350] [2024-06-14 13:24:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485097350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:08,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:08,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:08,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024253826] [2024-06-14 13:24:08,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:08,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:08,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:08,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 226 transitions, 2714 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:24:08,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:08,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:08,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:14,210 INFO L124 PetriNetUnfolderBase]: 12872/17648 cut-off events. [2024-06-14 13:24:14,210 INFO L125 PetriNetUnfolderBase]: For 472659/472659 co-relation queries the response was YES. [2024-06-14 13:24:14,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130096 conditions, 17648 events. 12872/17648 cut-off events. For 472659/472659 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 93064 event pairs, 3496 based on Foata normal form. 10/17656 useless extension candidates. Maximal degree in co-relation 130033. Up to 15227 conditions per place. [2024-06-14 13:24:14,353 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 241 selfloop transitions, 98 changer transitions 0/344 dead transitions. [2024-06-14 13:24:14,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 344 transitions, 4780 flow [2024-06-14 13:24:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:24:14,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:24:14,355 INFO L175 Difference]: Start difference. First operand has 138 places, 226 transitions, 2714 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:24:14,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 344 transitions, 4780 flow [2024-06-14 13:24:14,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 344 transitions, 4670 flow, removed 54 selfloop flow, removed 1 redundant places. [2024-06-14 13:24:14,878 INFO L231 Difference]: Finished difference. Result has 147 places, 276 transitions, 3658 flow [2024-06-14 13:24:14,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=147, PETRI_TRANSITIONS=276} [2024-06-14 13:24:14,879 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-14 13:24:14,879 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 276 transitions, 3658 flow [2024-06-14 13:24:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:24:14,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:14,880 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 13:24:14,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:24:14,880 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:14,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1896857589, now seen corresponding path program 3 times [2024-06-14 13:24:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:14,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458414968] [2024-06-14 13:24:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:17,460 INFO 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 13:24:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458414968] [2024-06-14 13:24:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458414968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:17,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292260378] [2024-06-14 13:24:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:17,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:17,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 276 transitions, 3658 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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 13:24:17,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:17,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:17,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand