./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix050.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix050.i ./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:58:49,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:58:49,712 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:58:49,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:58:49,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:58:49,729 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:58:49,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:58:49,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:58:49,730 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:58:49,730 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:58:49,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:58:49,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:58:49,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:58:49,732 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:58:49,732 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:58:49,732 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:58:49,732 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:58:49,733 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:58:49,733 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:58:49,733 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:58:49,734 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:58:49,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:58:49,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:58:49,734 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:58:49,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:58:49,735 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:58:49,735 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:58:49,736 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:58:49,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:58:49,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:58:49,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:58:49,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:58:49,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:58:49,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:58:49,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:58:49,738 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:58:49,738 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:58:49,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:58:49,739 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:58:49,739 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:58:49,739 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:58:49,739 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:58:49,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:58:49,740 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:58:49,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:58:49,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:58:49,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:58:49,913 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:58:49,913 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:58:49,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-21 16:58:51,035 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:58:51,245 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:58:51,245 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-21 16:58:51,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ada544d1/0c14d6cf555f4e609067cca566dff0e1/FLAGf71a09d44 [2024-06-21 16:58:51,278 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ada544d1/0c14d6cf555f4e609067cca566dff0e1 [2024-06-21 16:58:51,281 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:58:51,281 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:58:51,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml [2024-06-21 16:58:51,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:58:51,491 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:58:51,493 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:58:51,493 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:58:51,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:58:51,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:58:51" (1/2) ... [2024-06-21 16:58:51,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b298b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:58:51, skipping insertion in model container [2024-06-21 16:58:51,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:58:51" (1/2) ... [2024-06-21 16:58:51,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ad14b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:58:51, skipping insertion in model container [2024-06-21 16:58:51,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:58:51" (2/2) ... [2024-06-21 16:58:51,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b298b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:51, skipping insertion in model container [2024-06-21 16:58:51,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:58:51" (2/2) ... [2024-06-21 16:58:51,500 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:58:51,592 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:58:51,594 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:58:51,594 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:58:51,594 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:58:51,594 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:58:51,594 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:58:51,595 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-21 16:58:51,632 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:58:51,918 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:58:51,926 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:58:52,048 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:58:52,083 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:58:52,084 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52 WrapperNode [2024-06-21 16:58:52,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:58:52,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:58:52,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:58:52,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:58:52,092 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 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,113 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 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,143 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-21 16:58:52,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:58:52,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:58:52,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:58:52,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:58:52,155 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,158 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,175 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:58:52,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:58:52,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:58:52,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:58:52,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:58:52,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (1/1) ... [2024-06-21 16:58:52,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:58:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:58:52,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:58:52,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:58:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:58:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:58:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:58:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:58:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:58:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:58:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:58:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:58:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:58:52,316 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:58:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:58:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:58:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:58:52,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:58:52,319 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:58:52,430 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:58:52,432 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:58:52,816 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:58:52,816 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:58:52,964 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:58:52,964 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:58:52,965 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:58:52 BoogieIcfgContainer [2024-06-21 16:58:52,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:58:52,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:58:52,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:58:52,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:58:52,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:58:51" (1/4) ... [2024-06-21 16:58:52,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315fcc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:58:52, skipping insertion in model container [2024-06-21 16:58:52,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:58:51" (2/4) ... [2024-06-21 16:58:52,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315fcc65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:58:52, skipping insertion in model container [2024-06-21 16:58:52,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:58:52" (3/4) ... [2024-06-21 16:58:52,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315fcc65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:58:52, skipping insertion in model container [2024-06-21 16:58:52,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:58:52" (4/4) ... [2024-06-21 16:58:52,972 INFO L112 eAbstractionObserver]: Analyzing ICFG mix050.i [2024-06-21 16:58:52,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:58:52,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:58:52,985 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:58:53,032 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:58:53,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:58:53,102 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 16:58:53,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:58:53,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:58:53,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:58:53,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 16:58:53,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:58:53,119 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;@5ae4a011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:58:53,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:58:53,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:58:53,125 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:58:53,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:58:53,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:53,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:58:53,126 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)] === [2024-06-21 16:58:53,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash 406042836, now seen corresponding path program 1 times [2024-06-21 16:58:53,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:53,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532683341] [2024-06-21 16:58:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532683341] [2024-06-21 16:58:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532683341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:54,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:58:54,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762032394] [2024-06-21 16:58:54,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:58:54,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:58:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:58:54,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 16:58:54,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:54,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:54,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 16:58:54,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:55,392 INFO L124 PetriNetUnfolderBase]: 7892/10907 cut-off events. [2024-06-21 16:58:55,392 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-21 16:58:55,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21984 conditions, 10907 events. 7892/10907 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 57580 event pairs, 6010 based on Foata normal form. 1/10753 useless extension candidates. Maximal degree in co-relation 21971. Up to 10748 conditions per place. [2024-06-21 16:58:55,450 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 16:58:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-21 16:58:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:58:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:58:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-21 16:58:55,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-21 16:58:55,461 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 96 transitions. [2024-06-21 16:58:55,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-21 16:58:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:58:55,469 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 16:58:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 16:58:55,473 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 16:58:55,473 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 16:58:55,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:55,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:55,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:58:55,474 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)] === [2024-06-21 16:58:55,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash -634804941, now seen corresponding path program 1 times [2024-06-21 16:58:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198895635] [2024-06-21 16:58:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:55,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:56,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:56,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198895635] [2024-06-21 16:58:56,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198895635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:56,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:56,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:58:56,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206396551] [2024-06-21 16:58:56,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:56,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:58:56,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:58:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:58:56,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 16:58:56,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:56,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:56,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 16:58:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:57,239 INFO L124 PetriNetUnfolderBase]: 7882/10904 cut-off events. [2024-06-21 16:58:57,239 INFO L125 PetriNetUnfolderBase]: For 2124/2124 co-relation queries the response was YES. [2024-06-21 16:58:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24942 conditions, 10904 events. 7882/10904 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 57610 event pairs, 5323 based on Foata normal form. 4/10905 useless extension candidates. Maximal degree in co-relation 24930. Up to 10713 conditions per place. [2024-06-21 16:58:57,293 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 16:58:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-21 16:58:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:58:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:58:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-21 16:58:57,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-21 16:58:57,295 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 125 transitions. [2024-06-21 16:58:57,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-21 16:58:57,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:58:57,297 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 16:58:57,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 16:58:57,298 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 16:58:57,298 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 16:58:57,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:57,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:57,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:58:57,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:58:57,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash -162136686, now seen corresponding path program 1 times [2024-06-21 16:58:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181520879] [2024-06-21 16:58:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:58,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:58,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181520879] [2024-06-21 16:58:58,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181520879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:58,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:58,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:58:58,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033759235] [2024-06-21 16:58:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:58,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:58:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:58:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:58:58,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:58:58,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:58,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:58,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:58:58,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:59,574 INFO L124 PetriNetUnfolderBase]: 9557/13165 cut-off events. [2024-06-21 16:58:59,574 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-21 16:58:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33404 conditions, 13165 events. 9557/13165 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69864 event pairs, 5407 based on Foata normal form. 4/13166 useless extension candidates. Maximal degree in co-relation 33390. Up to 12912 conditions per place. [2024-06-21 16:58:59,623 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 73 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2024-06-21 16:58:59,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 504 flow [2024-06-21 16:58:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:58:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:58:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-21 16:58:59,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816993464052288 [2024-06-21 16:58:59,625 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 6 states and 178 transitions. [2024-06-21 16:58:59,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 504 flow [2024-06-21 16:58:59,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 476 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:58:59,628 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 254 flow [2024-06-21 16:58:59,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-21 16:58:59,629 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 16:58:59,629 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 254 flow [2024-06-21 16:58:59,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:59,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:59,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:58:59,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:58:59,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1843571480, now seen corresponding path program 1 times [2024-06-21 16:58:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222848624] [2024-06-21 16:58:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222848624] [2024-06-21 16:59:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222848624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:00,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:00,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126769709] [2024-06-21 16:59:00,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:00,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:00,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:00,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:00,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:00,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:00,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:00,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:00,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:01,996 INFO L124 PetriNetUnfolderBase]: 9541/13143 cut-off events. [2024-06-21 16:59:01,997 INFO L125 PetriNetUnfolderBase]: For 14290/14290 co-relation queries the response was YES. [2024-06-21 16:59:02,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37268 conditions, 13143 events. 9541/13143 cut-off events. For 14290/14290 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69851 event pairs, 4602 based on Foata normal form. 8/13148 useless extension candidates. Maximal degree in co-relation 37252. Up to 12846 conditions per place. [2024-06-21 16:59:02,061 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-21 16:59:02,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 594 flow [2024-06-21 16:59:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 16:59:02,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658263305322129 [2024-06-21 16:59:02,063 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 254 flow. Second operand 7 states and 202 transitions. [2024-06-21 16:59:02,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 594 flow [2024-06-21 16:59:02,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 107 transitions, 555 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:02,068 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 287 flow [2024-06-21 16:59:02,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 16:59:02,069 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-06-21 16:59:02,069 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 287 flow [2024-06-21 16:59:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:02,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:59:02,070 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)] === [2024-06-21 16:59:02,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1884147086, now seen corresponding path program 1 times [2024-06-21 16:59:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:02,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906107913] [2024-06-21 16:59:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:02,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:02,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906107913] [2024-06-21 16:59:02,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906107913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:02,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:02,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:59:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939211518] [2024-06-21 16:59:02,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:02,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:59:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:59:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:59:02,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:02,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:02,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:02,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:02,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:03,919 INFO L124 PetriNetUnfolderBase]: 9523/13167 cut-off events. [2024-06-21 16:59:03,919 INFO L125 PetriNetUnfolderBase]: For 22227/22227 co-relation queries the response was YES. [2024-06-21 16:59:03,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 13167 events. 9523/13167 cut-off events. For 22227/22227 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70093 event pairs, 4907 based on Foata normal form. 6/13170 useless extension candidates. Maximal degree in co-relation 39980. Up to 12897 conditions per place. [2024-06-21 16:59:03,994 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 65 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-21 16:59:03,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 509 flow [2024-06-21 16:59:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:59:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:59:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 16:59:03,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-06-21 16:59:03,996 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 287 flow. Second operand 5 states and 123 transitions. [2024-06-21 16:59:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 509 flow [2024-06-21 16:59:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 455 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:04,001 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 298 flow [2024-06-21 16:59:04,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-21 16:59:04,002 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-06-21 16:59:04,002 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 298 flow [2024-06-21 16:59:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:04,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:04,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:04,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:59:04,003 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)] === [2024-06-21 16:59:04,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash -151020639, now seen corresponding path program 1 times [2024-06-21 16:59:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627897446] [2024-06-21 16:59:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:04,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627897446] [2024-06-21 16:59:04,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627897446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:04,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:04,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553024758] [2024-06-21 16:59:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:04,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:04,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:04,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:04,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:04,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:04,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:04,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:04,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:04,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:06,078 INFO L124 PetriNetUnfolderBase]: 9598/13262 cut-off events. [2024-06-21 16:59:06,079 INFO L125 PetriNetUnfolderBase]: For 31479/31479 co-relation queries the response was YES. [2024-06-21 16:59:06,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43575 conditions, 13262 events. 9598/13262 cut-off events. For 31479/31479 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70566 event pairs, 4669 based on Foata normal form. 6/13263 useless extension candidates. Maximal degree in co-relation 43555. Up to 12924 conditions per place. [2024-06-21 16:59:06,161 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 16:59:06,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 709 flow [2024-06-21 16:59:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:59:06,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-21 16:59:06,163 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 298 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:59:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 709 flow [2024-06-21 16:59:06,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 107 transitions, 655 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:06,169 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 420 flow [2024-06-21 16:59:06,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-21 16:59:06,170 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-21 16:59:06,170 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 420 flow [2024-06-21 16:59:06,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:06,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:06,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:06,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:59:06,171 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)] === [2024-06-21 16:59:06,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1166465181, now seen corresponding path program 2 times [2024-06-21 16:59:06,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:06,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470892086] [2024-06-21 16:59:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:06,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:06,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470892086] [2024-06-21 16:59:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470892086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267352174] [2024-06-21 16:59:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:06,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:06,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:06,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:06,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:06,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:08,100 INFO L124 PetriNetUnfolderBase]: 9580/13243 cut-off events. [2024-06-21 16:59:08,100 INFO L125 PetriNetUnfolderBase]: For 43724/43724 co-relation queries the response was YES. [2024-06-21 16:59:08,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47546 conditions, 13243 events. 9580/13243 cut-off events. For 43724/43724 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70466 event pairs, 4762 based on Foata normal form. 6/13246 useless extension candidates. Maximal degree in co-relation 47524. Up to 12960 conditions per place. [2024-06-21 16:59:08,174 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-21 16:59:08,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 674 flow [2024-06-21 16:59:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 16:59:08,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-06-21 16:59:08,176 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 420 flow. Second operand 6 states and 146 transitions. [2024-06-21 16:59:08,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 674 flow [2024-06-21 16:59:08,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 628 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 16:59:08,196 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 413 flow [2024-06-21 16:59:08,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 16:59:08,197 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-21 16:59:08,197 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 413 flow [2024-06-21 16:59:08,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:08,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:08,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:08,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:59:08,198 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)] === [2024-06-21 16:59:08,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 125598203, now seen corresponding path program 1 times [2024-06-21 16:59:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875736163] [2024-06-21 16:59:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:08,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875736163] [2024-06-21 16:59:08,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875736163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:08,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561571151] [2024-06-21 16:59:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:09,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:09,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:09,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:09,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:10,586 INFO L124 PetriNetUnfolderBase]: 9624/13280 cut-off events. [2024-06-21 16:59:10,586 INFO L125 PetriNetUnfolderBase]: For 49768/49768 co-relation queries the response was YES. [2024-06-21 16:59:10,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48250 conditions, 13280 events. 9624/13280 cut-off events. For 49768/49768 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70374 event pairs, 4668 based on Foata normal form. 6/13283 useless extension candidates. Maximal degree in co-relation 48225. Up to 12993 conditions per place. [2024-06-21 16:59:10,668 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 93 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-21 16:59:10,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 773 flow [2024-06-21 16:59:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:59:10,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 16:59:10,671 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 413 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:59:10,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 773 flow [2024-06-21 16:59:10,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 117 transitions, 726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:10,692 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 459 flow [2024-06-21 16:59:10,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 16:59:10,692 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-21 16:59:10,693 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 459 flow [2024-06-21 16:59:10,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:10,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:10,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:10,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:59:10,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:10,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1149943319, now seen corresponding path program 2 times [2024-06-21 16:59:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:10,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539293121] [2024-06-21 16:59:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:10,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:11,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:11,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539293121] [2024-06-21 16:59:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539293121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:11,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:11,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:11,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417423378] [2024-06-21 16:59:11,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:11,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:11,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:11,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:11,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:11,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:11,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:13,066 INFO L124 PetriNetUnfolderBase]: 9699/13382 cut-off events. [2024-06-21 16:59:13,067 INFO L125 PetriNetUnfolderBase]: For 64147/64147 co-relation queries the response was YES. [2024-06-21 16:59:13,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52089 conditions, 13382 events. 9699/13382 cut-off events. For 64147/64147 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70916 event pairs, 4479 based on Foata normal form. 6/13383 useless extension candidates. Maximal degree in co-relation 52065. Up to 12935 conditions per place. [2024-06-21 16:59:13,135 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 86 selfloop transitions, 35 changer transitions 0/127 dead transitions. [2024-06-21 16:59:13,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 947 flow [2024-06-21 16:59:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:59:13,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 16:59:13,137 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 459 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:59:13,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 947 flow [2024-06-21 16:59:13,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 127 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:13,152 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 579 flow [2024-06-21 16:59:13,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-21 16:59:13,153 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-21 16:59:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 579 flow [2024-06-21 16:59:13,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:13,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:13,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:59:13,154 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)] === [2024-06-21 16:59:13,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1836430277, now seen corresponding path program 3 times [2024-06-21 16:59:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:13,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463556293] [2024-06-21 16:59:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:13,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:13,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463556293] [2024-06-21 16:59:13,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463556293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:13,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:13,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360690777] [2024-06-21 16:59:13,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:13,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:13,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:13,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:13,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:15,197 INFO L124 PetriNetUnfolderBase]: 9681/13363 cut-off events. [2024-06-21 16:59:15,198 INFO L125 PetriNetUnfolderBase]: For 81727/81727 co-relation queries the response was YES. [2024-06-21 16:59:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55284 conditions, 13363 events. 9681/13363 cut-off events. For 81727/81727 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70828 event pairs, 4675 based on Foata normal form. 6/13366 useless extension candidates. Maximal degree in co-relation 55259. Up to 13060 conditions per place. [2024-06-21 16:59:15,279 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 96 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-21 16:59:15,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 895 flow [2024-06-21 16:59:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 16:59:15,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:59:15,281 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 579 flow. Second operand 7 states and 170 transitions. [2024-06-21 16:59:15,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 895 flow [2024-06-21 16:59:15,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 811 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:15,321 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 542 flow [2024-06-21 16:59:15,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-21 16:59:15,322 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-21 16:59:15,322 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 542 flow [2024-06-21 16:59:15,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:15,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:15,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:15,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:59:15,323 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)] === [2024-06-21 16:59:15,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 303095957, now seen corresponding path program 1 times [2024-06-21 16:59:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202687047] [2024-06-21 16:59:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202687047] [2024-06-21 16:59:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202687047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695129442] [2024-06-21 16:59:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:16,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 16:59:16,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 542 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:16,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:16,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 16:59:16,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:18,219 INFO L124 PetriNetUnfolderBase]: 11757/16149 cut-off events. [2024-06-21 16:59:18,219 INFO L125 PetriNetUnfolderBase]: For 108268/108268 co-relation queries the response was YES. [2024-06-21 16:59:18,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66383 conditions, 16149 events. 11757/16149 cut-off events. For 108268/108268 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 85614 event pairs, 5699 based on Foata normal form. 6/16152 useless extension candidates. Maximal degree in co-relation 66356. Up to 15837 conditions per place. [2024-06-21 16:59:18,321 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 101 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-21 16:59:18,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 941 flow [2024-06-21 16:59:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 16:59:18,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-21 16:59:18,324 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 542 flow. Second operand 7 states and 163 transitions. [2024-06-21 16:59:18,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 941 flow [2024-06-21 16:59:18,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 126 transitions, 875 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:18,374 INFO L231 Difference]: Finished difference. Result has 82 places, 94 transitions, 614 flow [2024-06-21 16:59:18,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=82, PETRI_TRANSITIONS=94} [2024-06-21 16:59:18,375 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2024-06-21 16:59:18,375 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 94 transitions, 614 flow [2024-06-21 16:59:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:18,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:18,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:18,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:59:18,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:18,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -476256706, now seen corresponding path program 1 times [2024-06-21 16:59:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:18,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702940028] [2024-06-21 16:59:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:18,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702940028] [2024-06-21 16:59:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702940028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:18,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:18,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:59:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232407938] [2024-06-21 16:59:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:59:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:59:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:59:19,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:19,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 94 transitions, 614 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:19,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:19,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:20,482 INFO L124 PetriNetUnfolderBase]: 11135/15454 cut-off events. [2024-06-21 16:59:20,483 INFO L125 PetriNetUnfolderBase]: For 125299/125305 co-relation queries the response was YES. [2024-06-21 16:59:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67731 conditions, 15454 events. 11135/15454 cut-off events. For 125299/125305 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83225 event pairs, 5731 based on Foata normal form. 10/15425 useless extension candidates. Maximal degree in co-relation 67702. Up to 15072 conditions per place. [2024-06-21 16:59:20,590 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 94 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2024-06-21 16:59:20,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 900 flow [2024-06-21 16:59:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:59:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:59:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 16:59:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 16:59:20,591 INFO L175 Difference]: Start difference. First operand has 82 places, 94 transitions, 614 flow. Second operand 5 states and 119 transitions. [2024-06-21 16:59:20,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 900 flow [2024-06-21 16:59:20,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 830 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:20,653 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 621 flow [2024-06-21 16:59:20,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=621, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-21 16:59:20,653 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-21 16:59:20,653 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 621 flow [2024-06-21 16:59:20,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:20,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:20,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:20,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:59:20,654 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)] === [2024-06-21 16:59:20,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash 598957428, now seen corresponding path program 1 times [2024-06-21 16:59:20,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547030997] [2024-06-21 16:59:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:20,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:21,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547030997] [2024-06-21 16:59:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547030997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:21,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:21,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125354599] [2024-06-21 16:59:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:21,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:21,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:21,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:21,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:21,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:21,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:23,592 INFO L124 PetriNetUnfolderBase]: 11630/15996 cut-off events. [2024-06-21 16:59:23,592 INFO L125 PetriNetUnfolderBase]: For 146747/146747 co-relation queries the response was YES. [2024-06-21 16:59:23,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73301 conditions, 15996 events. 11630/15996 cut-off events. For 146747/146747 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 86041 event pairs, 5236 based on Foata normal form. 6/15999 useless extension candidates. Maximal degree in co-relation 73271. Up to 15586 conditions per place. [2024-06-21 16:59:23,696 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 129 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-21 16:59:23,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 1279 flow [2024-06-21 16:59:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 16:59:23,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010893246187363 [2024-06-21 16:59:23,698 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 621 flow. Second operand 9 states and 230 transitions. [2024-06-21 16:59:23,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 1279 flow [2024-06-21 16:59:23,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 166 transitions, 1232 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:23,742 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 765 flow [2024-06-21 16:59:23,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=765, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-21 16:59:23,743 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-21 16:59:23,743 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 765 flow [2024-06-21 16:59:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:23,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:23,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:59:23,744 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)] === [2024-06-21 16:59:23,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -401421806, now seen corresponding path program 2 times [2024-06-21 16:59:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008535745] [2024-06-21 16:59:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008535745] [2024-06-21 16:59:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008535745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:24,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:24,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980400079] [2024-06-21 16:59:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:24,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:24,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 765 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:24,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:24,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:24,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:26,647 INFO L124 PetriNetUnfolderBase]: 11612/15985 cut-off events. [2024-06-21 16:59:26,647 INFO L125 PetriNetUnfolderBase]: For 172618/172618 co-relation queries the response was YES. [2024-06-21 16:59:26,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76969 conditions, 15985 events. 11612/15985 cut-off events. For 172618/172618 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86306 event pairs, 5243 based on Foata normal form. 6/15988 useless extension candidates. Maximal degree in co-relation 76938. Up to 15622 conditions per place. [2024-06-21 16:59:26,754 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 123 selfloop transitions, 22 changer transitions 0/152 dead transitions. [2024-06-21 16:59:26,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 152 transitions, 1177 flow [2024-06-21 16:59:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:59:26,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877450980392157 [2024-06-21 16:59:26,756 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 765 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:59:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 152 transitions, 1177 flow [2024-06-21 16:59:26,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1065 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:26,819 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 708 flow [2024-06-21 16:59:26,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=708, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-21 16:59:26,820 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 16:59:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 708 flow [2024-06-21 16:59:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:59:26,821 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)] === [2024-06-21 16:59:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash 898091328, now seen corresponding path program 3 times [2024-06-21 16:59:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415456392] [2024-06-21 16:59:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:27,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:27,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415456392] [2024-06-21 16:59:27,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415456392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:27,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:27,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:27,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407713246] [2024-06-21 16:59:27,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:27,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:27,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:27,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:27,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:27,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 708 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:27,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:27,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:27,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:29,736 INFO L124 PetriNetUnfolderBase]: 11645/16034 cut-off events. [2024-06-21 16:59:29,737 INFO L125 PetriNetUnfolderBase]: For 189129/189129 co-relation queries the response was YES. [2024-06-21 16:59:29,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78353 conditions, 16034 events. 11645/16034 cut-off events. For 189129/189129 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86694 event pairs, 5032 based on Foata normal form. 6/16033 useless extension candidates. Maximal degree in co-relation 78320. Up to 15490 conditions per place. [2024-06-21 16:59:29,859 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 106 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-21 16:59:29,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 1190 flow [2024-06-21 16:59:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:59:29,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-06-21 16:59:29,861 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 708 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:59:29,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 1190 flow [2024-06-21 16:59:29,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 1135 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:29,954 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 820 flow [2024-06-21 16:59:29,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=820, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-21 16:59:29,955 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-21 16:59:29,955 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 820 flow [2024-06-21 16:59:29,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:29,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:29,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:29,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:59:29,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:29,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1097082910, now seen corresponding path program 1 times [2024-06-21 16:59:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:29,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489021394] [2024-06-21 16:59:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:29,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489021394] [2024-06-21 16:59:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489021394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:30,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:30,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981558291] [2024-06-21 16:59:30,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:30,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:30,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:31,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 16:59:31,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:31,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:31,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 16:59:31,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:32,864 INFO L124 PetriNetUnfolderBase]: 11976/16422 cut-off events. [2024-06-21 16:59:32,864 INFO L125 PetriNetUnfolderBase]: For 219617/219617 co-relation queries the response was YES. [2024-06-21 16:59:32,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83927 conditions, 16422 events. 11976/16422 cut-off events. For 219617/219617 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86331 event pairs, 5646 based on Foata normal form. 3/16422 useless extension candidates. Maximal degree in co-relation 83893. Up to 16122 conditions per place. [2024-06-21 16:59:32,965 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 120 selfloop transitions, 25 changer transitions 0/150 dead transitions. [2024-06-21 16:59:32,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 150 transitions, 1293 flow [2024-06-21 16:59:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 16:59:32,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2024-06-21 16:59:32,966 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 820 flow. Second operand 7 states and 164 transitions. [2024-06-21 16:59:32,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 150 transitions, 1293 flow [2024-06-21 16:59:33,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1152 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:33,046 INFO L231 Difference]: Finished difference. Result has 94 places, 118 transitions, 860 flow [2024-06-21 16:59:33,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=94, PETRI_TRANSITIONS=118} [2024-06-21 16:59:33,046 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-06-21 16:59:33,047 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 118 transitions, 860 flow [2024-06-21 16:59:33,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:33,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:33,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:33,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:59:33,047 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)] === [2024-06-21 16:59:33,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -253812206, now seen corresponding path program 4 times [2024-06-21 16:59:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:33,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423811930] [2024-06-21 16:59:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423811930] [2024-06-21 16:59:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423811930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:34,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:34,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:34,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339550505] [2024-06-21 16:59:34,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:34,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:34,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:34,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:34,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:34,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:34,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:35,989 INFO L124 PetriNetUnfolderBase]: 11672/16096 cut-off events. [2024-06-21 16:59:35,989 INFO L125 PetriNetUnfolderBase]: For 247962/247962 co-relation queries the response was YES. [2024-06-21 16:59:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85697 conditions, 16096 events. 11672/16096 cut-off events. For 247962/247962 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 87127 event pairs, 5149 based on Foata normal form. 9/16102 useless extension candidates. Maximal degree in co-relation 85662. Up to 15612 conditions per place. [2024-06-21 16:59:36,137 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 127 selfloop transitions, 29 changer transitions 0/163 dead transitions. [2024-06-21 16:59:36,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 163 transitions, 1360 flow [2024-06-21 16:59:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:59:36,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 16:59:36,139 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 860 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:59:36,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 163 transitions, 1360 flow [2024-06-21 16:59:36,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 163 transitions, 1274 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:36,238 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 929 flow [2024-06-21 16:59:36,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-21 16:59:36,239 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 16:59:36,239 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 929 flow [2024-06-21 16:59:36,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:36,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:36,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:36,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:59:36,239 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)] === [2024-06-21 16:59:36,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 438027830, now seen corresponding path program 1 times [2024-06-21 16:59:36,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:36,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722689320] [2024-06-21 16:59:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:36,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:37,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722689320] [2024-06-21 16:59:37,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722689320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:37,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292808885] [2024-06-21 16:59:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:37,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 929 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:37,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:39,507 INFO L124 PetriNetUnfolderBase]: 12135/16753 cut-off events. [2024-06-21 16:59:39,507 INFO L125 PetriNetUnfolderBase]: For 306301/306301 co-relation queries the response was YES. [2024-06-21 16:59:39,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94689 conditions, 16753 events. 12135/16753 cut-off events. For 306301/306301 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 91613 event pairs, 4509 based on Foata normal form. 24/16774 useless extension candidates. Maximal degree in co-relation 94653. Up to 15791 conditions per place. [2024-06-21 16:59:39,657 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 159 selfloop transitions, 36 changer transitions 0/202 dead transitions. [2024-06-21 16:59:39,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 202 transitions, 1777 flow [2024-06-21 16:59:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:59:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:59:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-21 16:59:39,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078431372549019 [2024-06-21 16:59:39,659 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 929 flow. Second operand 10 states and 259 transitions. [2024-06-21 16:59:39,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 202 transitions, 1777 flow [2024-06-21 16:59:39,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 202 transitions, 1654 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:39,798 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1007 flow [2024-06-21 16:59:39,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1007, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-06-21 16:59:39,798 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-21 16:59:39,798 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1007 flow [2024-06-21 16:59:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:39,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:39,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:39,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:59:39,799 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:39,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 438030620, now seen corresponding path program 2 times [2024-06-21 16:59:39,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:39,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806870868] [2024-06-21 16:59:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806870868] [2024-06-21 16:59:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806870868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:41,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:41,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050768954] [2024-06-21 16:59:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:41,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:41,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1007 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:41,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:41,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:41,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:43,197 INFO L124 PetriNetUnfolderBase]: 12051/16637 cut-off events. [2024-06-21 16:59:43,198 INFO L125 PetriNetUnfolderBase]: For 335265/335265 co-relation queries the response was YES. [2024-06-21 16:59:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95490 conditions, 16637 events. 12051/16637 cut-off events. For 335265/335265 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 90718 event pairs, 5068 based on Foata normal form. 36/16670 useless extension candidates. Maximal degree in co-relation 95453. Up to 15949 conditions per place. [2024-06-21 16:59:43,364 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 156 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2024-06-21 16:59:43,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 195 transitions, 1593 flow [2024-06-21 16:59:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:59:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:59:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-21 16:59:43,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-06-21 16:59:43,368 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1007 flow. Second operand 10 states and 252 transitions. [2024-06-21 16:59:43,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 195 transitions, 1593 flow [2024-06-21 16:59:43,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 195 transitions, 1526 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:43,507 INFO L231 Difference]: Finished difference. Result has 105 places, 126 transitions, 1017 flow [2024-06-21 16:59:43,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1017, PETRI_PLACES=105, PETRI_TRANSITIONS=126} [2024-06-21 16:59:43,508 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-21 16:59:43,508 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 126 transitions, 1017 flow [2024-06-21 16:59:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:43,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:43,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:43,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:59:43,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:43,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1141685312, now seen corresponding path program 1 times [2024-06-21 16:59:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:43,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157405644] [2024-06-21 16:59:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:44,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157405644] [2024-06-21 16:59:44,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157405644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:44,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:44,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421892793] [2024-06-21 16:59:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:44,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:44,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 16:59:44,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 126 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:44,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:44,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 16:59:44,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:46,768 INFO L124 PetriNetUnfolderBase]: 12416/17084 cut-off events. [2024-06-21 16:59:46,768 INFO L125 PetriNetUnfolderBase]: For 356315/356320 co-relation queries the response was YES. [2024-06-21 16:59:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98607 conditions, 17084 events. 12416/17084 cut-off events. For 356315/356320 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 91162 event pairs, 5257 based on Foata normal form. 8/17087 useless extension candidates. Maximal degree in co-relation 98568. Up to 16661 conditions per place. [2024-06-21 16:59:46,927 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 138 selfloop transitions, 35 changer transitions 0/178 dead transitions. [2024-06-21 16:59:46,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 178 transitions, 1574 flow [2024-06-21 16:59:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 16:59:46,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730392156862745 [2024-06-21 16:59:46,929 INFO L175 Difference]: Start difference. First operand has 105 places, 126 transitions, 1017 flow. Second operand 8 states and 193 transitions. [2024-06-21 16:59:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 178 transitions, 1574 flow [2024-06-21 16:59:47,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 178 transitions, 1502 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:59:47,105 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1129 flow [2024-06-21 16:59:47,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1129, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-21 16:59:47,105 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-21 16:59:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1129 flow [2024-06-21 16:59:47,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:47,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:47,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:59:47,106 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:47,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash 556118300, now seen corresponding path program 3 times [2024-06-21 16:59:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374709876] [2024-06-21 16:59:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374709876] [2024-06-21 16:59:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374709876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:48,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816453238] [2024-06-21 16:59:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:48,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:48,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1129 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:48,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:48,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:48,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:50,441 INFO L124 PetriNetUnfolderBase]: 12226/16970 cut-off events. [2024-06-21 16:59:50,441 INFO L125 PetriNetUnfolderBase]: For 403847/403853 co-relation queries the response was YES. [2024-06-21 16:59:50,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101969 conditions, 16970 events. 12226/16970 cut-off events. For 403847/403853 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 93754 event pairs, 4648 based on Foata normal form. 40/16989 useless extension candidates. Maximal degree in co-relation 101928. Up to 16038 conditions per place. [2024-06-21 16:59:50,601 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 131 selfloop transitions, 60 changer transitions 0/199 dead transitions. [2024-06-21 16:59:50,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 199 transitions, 1969 flow [2024-06-21 16:59:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 16:59:50,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054466230936819 [2024-06-21 16:59:50,603 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1129 flow. Second operand 9 states and 232 transitions. [2024-06-21 16:59:50,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 199 transitions, 1969 flow [2024-06-21 16:59:50,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1841 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:50,776 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1325 flow [2024-06-21 16:59:50,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-21 16:59:50,776 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-21 16:59:50,776 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1325 flow [2024-06-21 16:59:50,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:50,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:50,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:59:50,777 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)] === [2024-06-21 16:59:50,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1202493005, now seen corresponding path program 1 times [2024-06-21 16:59:50,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:50,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996331157] [2024-06-21 16:59:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996331157] [2024-06-21 16:59:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996331157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:51,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:51,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880806135] [2024-06-21 16:59:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:51,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:51,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:51,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1325 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 16:59:51,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:51,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:51,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:53,835 INFO L124 PetriNetUnfolderBase]: 12154/16978 cut-off events. [2024-06-21 16:59:53,835 INFO L125 PetriNetUnfolderBase]: For 446132/446194 co-relation queries the response was YES. [2024-06-21 16:59:53,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106481 conditions, 16978 events. 12154/16978 cut-off events. For 446132/446194 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93634 event pairs, 5264 based on Foata normal form. 14/16953 useless extension candidates. Maximal degree in co-relation 106438. Up to 16363 conditions per place. [2024-06-21 16:59:53,975 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 142 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-21 16:59:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1949 flow [2024-06-21 16:59:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 16:59:53,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 16:59:53,976 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1325 flow. Second operand 6 states and 150 transitions. [2024-06-21 16:59:53,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1949 flow [2024-06-21 16:59:54,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 179 transitions, 1883 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:54,167 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1479 flow [2024-06-21 16:59:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1479, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-21 16:59:54,168 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 16:59:54,168 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1479 flow [2024-06-21 16:59:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 16:59:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:54,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:59:54,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:54,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash -782526092, now seen corresponding path program 2 times [2024-06-21 16:59:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579517752] [2024-06-21 16:59:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:55,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579517752] [2024-06-21 16:59:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579517752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:55,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:55,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212558259] [2024-06-21 16:59:55,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:55,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:55,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 16:59:55,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:55,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:55,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 16:59:55,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:57,895 INFO L124 PetriNetUnfolderBase]: 12762/17626 cut-off events. [2024-06-21 16:59:57,895 INFO L125 PetriNetUnfolderBase]: For 480021/480021 co-relation queries the response was YES. [2024-06-21 16:59:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114053 conditions, 17626 events. 12762/17626 cut-off events. For 480021/480021 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94625 event pairs, 5257 based on Foata normal form. 6/17629 useless extension candidates. Maximal degree in co-relation 114007. Up to 17241 conditions per place. [2024-06-21 16:59:58,247 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 166 selfloop transitions, 23 changer transitions 0/194 dead transitions. [2024-06-21 16:59:58,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 194 transitions, 2039 flow [2024-06-21 16:59:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:59:58,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534313725490196 [2024-06-21 16:59:58,248 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1479 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:59:58,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 194 transitions, 2039 flow [2024-06-21 16:59:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 1989 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 16:59:58,402 INFO L231 Difference]: Finished difference. Result has 119 places, 154 transitions, 1571 flow [2024-06-21 16:59:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=119, PETRI_TRANSITIONS=154} [2024-06-21 16:59:58,403 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-21 16:59:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 154 transitions, 1571 flow [2024-06-21 16:59:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:58,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:59:58,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:58,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1019182820, now seen corresponding path program 4 times [2024-06-21 16:59:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932739151] [2024-06-21 16:59:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932739151] [2024-06-21 16:59:59,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932739151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:59,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:59,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670359412] [2024-06-21 16:59:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:59,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 16:59:59,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 154 transitions, 1571 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:59,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:59,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 16:59:59,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:02,091 INFO L124 PetriNetUnfolderBase]: 12506/17376 cut-off events. [2024-06-21 17:00:02,092 INFO L125 PetriNetUnfolderBase]: For 539143/539143 co-relation queries the response was YES. [2024-06-21 17:00:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116017 conditions, 17376 events. 12506/17376 cut-off events. For 539143/539143 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 96002 event pairs, 4861 based on Foata normal form. 42/17415 useless extension candidates. Maximal degree in co-relation 115968. Up to 16569 conditions per place. [2024-06-21 17:00:02,248 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/210 dead transitions. [2024-06-21 17:00:02,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 2229 flow [2024-06-21 17:00:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:00:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:00:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 17:00:02,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 17:00:02,250 INFO L175 Difference]: Start difference. First operand has 119 places, 154 transitions, 1571 flow. Second operand 9 states and 221 transitions. [2024-06-21 17:00:02,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 2229 flow [2024-06-21 17:00:02,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 2113 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:02,490 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1608 flow [2024-06-21 17:00:02,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1608, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-06-21 17:00:02,491 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 17:00:02,491 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1608 flow [2024-06-21 17:00:02,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:02,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:02,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:00:02,491 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:02,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash -782823010, now seen corresponding path program 1 times [2024-06-21 17:00:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:02,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900660851] [2024-06-21 17:00:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900660851] [2024-06-21 17:00:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900660851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:03,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:03,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:03,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191102709] [2024-06-21 17:00:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:03,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:03,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:03,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:03,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:00:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1608 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:03,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:00:03,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:06,540 INFO L124 PetriNetUnfolderBase]: 12931/17876 cut-off events. [2024-06-21 17:00:06,540 INFO L125 PetriNetUnfolderBase]: For 568162/568162 co-relation queries the response was YES. [2024-06-21 17:00:06,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120982 conditions, 17876 events. 12931/17876 cut-off events. For 568162/568162 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96314 event pairs, 5366 based on Foata normal form. 3/17876 useless extension candidates. Maximal degree in co-relation 120932. Up to 17461 conditions per place. [2024-06-21 17:00:06,690 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 162 selfloop transitions, 33 changer transitions 0/200 dead transitions. [2024-06-21 17:00:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 200 transitions, 2147 flow [2024-06-21 17:00:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 17:00:06,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:00:06,692 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1608 flow. Second operand 8 states and 187 transitions. [2024-06-21 17:00:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 200 transitions, 2147 flow [2024-06-21 17:00:07,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 2005 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:07,161 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1599 flow [2024-06-21 17:00:07,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-21 17:00:07,162 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-21 17:00:07,162 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1599 flow [2024-06-21 17:00:07,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:07,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:07,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:07,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:00:07,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:07,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1018998122, now seen corresponding path program 3 times [2024-06-21 17:00:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:07,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185262839] [2024-06-21 17:00:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185262839] [2024-06-21 17:00:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185262839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619391102] [2024-06-21 17:00:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:08,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:00:08,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:08,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:08,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:00:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:10,676 INFO L124 PetriNetUnfolderBase]: 12967/17928 cut-off events. [2024-06-21 17:00:10,676 INFO L125 PetriNetUnfolderBase]: For 589796/589796 co-relation queries the response was YES. [2024-06-21 17:00:10,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121801 conditions, 17928 events. 12967/17928 cut-off events. For 589796/589796 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96510 event pairs, 5326 based on Foata normal form. 6/17931 useless extension candidates. Maximal degree in co-relation 121750. Up to 17521 conditions per place. [2024-06-21 17:00:10,827 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 175 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2024-06-21 17:00:10,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 208 transitions, 2240 flow [2024-06-21 17:00:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 17:00:10,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-06-21 17:00:10,828 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1599 flow. Second operand 8 states and 188 transitions. [2024-06-21 17:00:10,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 208 transitions, 2240 flow [2024-06-21 17:00:11,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 208 transitions, 2122 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:11,087 INFO L231 Difference]: Finished difference. Result has 125 places, 167 transitions, 1692 flow [2024-06-21 17:00:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1692, PETRI_PLACES=125, PETRI_TRANSITIONS=167} [2024-06-21 17:00:11,088 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-06-21 17:00:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 167 transitions, 1692 flow [2024-06-21 17:00:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:11,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:11,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:00:11,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:11,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash -790866332, now seen corresponding path program 4 times [2024-06-21 17:00:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:11,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918923797] [2024-06-21 17:00:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:12,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918923797] [2024-06-21 17:00:12,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918923797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:12,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:12,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17398070] [2024-06-21 17:00:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:12,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:00:12,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 167 transitions, 1692 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:12,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:12,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:00:12,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:15,036 INFO L124 PetriNetUnfolderBase]: 12952/17907 cut-off events. [2024-06-21 17:00:15,037 INFO L125 PetriNetUnfolderBase]: For 636720/636720 co-relation queries the response was YES. [2024-06-21 17:00:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125170 conditions, 17907 events. 12952/17907 cut-off events. For 636720/636720 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96430 event pairs, 5331 based on Foata normal form. 6/17910 useless extension candidates. Maximal degree in co-relation 125117. Up to 17507 conditions per place. [2024-06-21 17:00:15,185 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 177 selfloop transitions, 28 changer transitions 0/210 dead transitions. [2024-06-21 17:00:15,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 2302 flow [2024-06-21 17:00:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 17:00:15,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2024-06-21 17:00:15,186 INFO L175 Difference]: Start difference. First operand has 125 places, 167 transitions, 1692 flow. Second operand 8 states and 186 transitions. [2024-06-21 17:00:15,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 2302 flow [2024-06-21 17:00:15,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 210 transitions, 2156 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:15,484 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1715 flow [2024-06-21 17:00:15,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1715, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-21 17:00:15,485 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-21 17:00:15,485 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1715 flow [2024-06-21 17:00:15,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:15,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:15,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:00:15,486 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:15,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1878855965, now seen corresponding path program 2 times [2024-06-21 17:00:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762643645] [2024-06-21 17:00:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762643645] [2024-06-21 17:00:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762643645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:00:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365287669] [2024-06-21 17:00:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:00:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:00:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:00:16,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:00:16,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1715 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 17:00:16,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:16,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:00:16,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:18,948 INFO L124 PetriNetUnfolderBase]: 12300/17218 cut-off events. [2024-06-21 17:00:18,948 INFO L125 PetriNetUnfolderBase]: For 670423/670471 co-relation queries the response was YES. [2024-06-21 17:00:19,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122597 conditions, 17218 events. 12300/17218 cut-off events. For 670423/670471 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 95201 event pairs, 5302 based on Foata normal form. 6/17174 useless extension candidates. Maximal degree in co-relation 122543. Up to 16655 conditions per place. [2024-06-21 17:00:19,085 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 158 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2024-06-21 17:00:19,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 2109 flow [2024-06-21 17:00:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:00:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:00:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:00:19,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-21 17:00:19,086 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1715 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:00:19,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 2109 flow [2024-06-21 17:00:19,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1938 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:19,365 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1581 flow [2024-06-21 17:00:19,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1581, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-21 17:00:19,365 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-21 17:00:19,366 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1581 flow [2024-06-21 17:00:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 17:00:19,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:19,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:19,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:00:19,366 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:19,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash -214753477, now seen corresponding path program 1 times [2024-06-21 17:00:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:19,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143878339] [2024-06-21 17:00:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:20,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143878339] [2024-06-21 17:00:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143878339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:20,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:20,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:00:20,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877553906] [2024-06-21 17:00:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:00:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:00:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:00:20,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:00:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1581 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:20,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:00:20,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:22,595 INFO L124 PetriNetUnfolderBase]: 12956/17911 cut-off events. [2024-06-21 17:00:22,595 INFO L125 PetriNetUnfolderBase]: For 707567/707567 co-relation queries the response was YES. [2024-06-21 17:00:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128199 conditions, 17911 events. 12956/17911 cut-off events. For 707567/707567 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96599 event pairs, 5327 based on Foata normal form. 4/17909 useless extension candidates. Maximal degree in co-relation 128144. Up to 17561 conditions per place. [2024-06-21 17:00:22,772 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 174 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-21 17:00:22,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2295 flow [2024-06-21 17:00:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:00:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:00:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 17:00:22,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2024-06-21 17:00:22,773 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1581 flow. Second operand 6 states and 143 transitions. [2024-06-21 17:00:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2295 flow [2024-06-21 17:00:23,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 203 transitions, 2238 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:23,153 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1729 flow [2024-06-21 17:00:23,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2024-06-21 17:00:23,154 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 17:00:23,154 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1729 flow [2024-06-21 17:00:23,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:23,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:23,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:23,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:00:23,154 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:23,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1901205167, now seen corresponding path program 2 times [2024-06-21 17:00:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:23,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891260812] [2024-06-21 17:00:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:23,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:23,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891260812] [2024-06-21 17:00:23,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891260812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:23,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:23,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:00:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712842281] [2024-06-21 17:00:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:23,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:00:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:00:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:00:23,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:00:23,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:23,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:23,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:00:23,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:26,322 INFO L124 PetriNetUnfolderBase]: 12942/17897 cut-off events. [2024-06-21 17:00:26,322 INFO L125 PetriNetUnfolderBase]: For 750794/750799 co-relation queries the response was YES. [2024-06-21 17:00:26,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131687 conditions, 17897 events. 12942/17897 cut-off events. For 750794/750799 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96357 event pairs, 5324 based on Foata normal form. 8/17901 useless extension candidates. Maximal degree in co-relation 131632. Up to 17549 conditions per place. [2024-06-21 17:00:26,658 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 169 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-21 17:00:26,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 198 transitions, 2169 flow [2024-06-21 17:00:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:00:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:00:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 17:00:26,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2024-06-21 17:00:26,659 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 1729 flow. Second operand 6 states and 137 transitions. [2024-06-21 17:00:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 198 transitions, 2169 flow