./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix014_tso.oepc.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/mix014_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix014_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix014_tso.oepc.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-7724a2d-m [2024-06-27 20:01:39,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:01:39,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:01:39,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:01:39,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:01:39,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:01:39,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:01:39,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:01:39,402 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:01:39,405 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:01:39,406 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:01:39,406 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:01:39,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:01:39,408 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:01:39,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:01:39,409 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:01:39,410 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:01:39,410 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:01:39,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:01:39,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:01:39,411 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:01:39,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:01:39,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:01:39,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:01:39,412 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:01:39,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:01:39,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:01:39,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:01:39,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:01:39,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:01:39,647 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:01:39,648 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:01:39,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix014_tso.oepc.yml/witness.yml [2024-06-27 20:01:39,880 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:01:39,880 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:01:39,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix014_tso.oepc.i [2024-06-27 20:01:40,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:01:41,167 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:01:41,170 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix014_tso.oepc.i [2024-06-27 20:01:41,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2095b293d/b7f4b673a1d44a4ea45e49d49c467885/FLAG223e87b0c [2024-06-27 20:01:41,200 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2095b293d/b7f4b673a1d44a4ea45e49d49c467885 [2024-06-27 20:01:41,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:01:41,202 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:01:41,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:01:41,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:01:41,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:01:41,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:39" (1/2) ... [2024-06-27 20:01:41,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7e1a53 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:01:41, skipping insertion in model container [2024-06-27 20:01:41,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:39" (1/2) ... [2024-06-27 20:01:41,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c7ea233 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:01:41, skipping insertion in model container [2024-06-27 20:01:41,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:01:41" (2/2) ... [2024-06-27 20:01:41,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7e1a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41, skipping insertion in model container [2024-06-27 20:01:41,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:01:41" (2/2) ... [2024-06-27 20:01:41,211 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:01:41,369 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:01:41,370 INFO L97 edCorrectnessWitness]: Location invariant before [L925-L925] (((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:01:41,370 INFO L97 edCorrectnessWitness]: Location invariant before [L927-L927] (((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:01:41,371 INFO L97 edCorrectnessWitness]: Location invariant before [L929-L929] (((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:01:41,371 INFO L97 edCorrectnessWitness]: Location invariant before [L930-L930] (((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:01:41,371 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:01:41,371 INFO L106 edCorrectnessWitness]: ghost_update [L923-L923] multithreaded = 1; [2024-06-27 20:01:41,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:01:41,788 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:01:41,801 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:01:41,922 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:01:41,965 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:01:41,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41 WrapperNode [2024-06-27 20:01:41,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:01:41,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:01:41,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:01:41,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:01:41,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:41,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,048 INFO L138 Inliner]: procedures = 176, calls = 57, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 265 [2024-06-27 20:01:42,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:01:42,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:01:42,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:01:42,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:01:42,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,072 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,089 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]. [2024-06-27 20:01:42,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,104 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:01:42,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:01:42,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:01:42,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:01:42,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (1/1) ... [2024-06-27 20:01:42,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:01:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:01:42,159 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) [2024-06-27 20:01:42,172 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 [2024-06-27 20:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:01:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:01:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:01:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:01:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:01:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:01:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:01:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:01:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:01:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:01:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:01:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:01:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:01:42,195 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:01:42,315 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:01:42,317 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:01:42,770 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:01:42,770 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:01:43,005 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:01:43,005 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:01:43,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:01:43 BoogieIcfgContainer [2024-06-27 20:01:43,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:01:43,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:01:43,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:01:43,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:01:43,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:39" (1/4) ... [2024-06-27 20:01:43,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a76b03 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:01:43, skipping insertion in model container [2024-06-27 20:01:43,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:01:41" (2/4) ... [2024-06-27 20:01:43,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a76b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:01:43, skipping insertion in model container [2024-06-27 20:01:43,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:41" (3/4) ... [2024-06-27 20:01:43,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a76b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:01:43, skipping insertion in model container [2024-06-27 20:01:43,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:01:43" (4/4) ... [2024-06-27 20:01:43,012 INFO L112 eAbstractionObserver]: Analyzing ICFG mix014_tso.oepc.i [2024-06-27 20:01:43,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:01:43,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:01:43,026 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:01:43,083 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:01:43,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:01:43,142 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:01:43,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:01:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:01:43,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:01:43,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:01:43,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:01:43,166 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;@3063a539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:01:43,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:01:43,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:01:43,172 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:01:43,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:01:43,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:43,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:01:43,174 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)] === [2024-06-27 20:01:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 594913301, now seen corresponding path program 1 times [2024-06-27 20:01:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942678405] [2024-06-27 20:01:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942678405] [2024-06-27 20:01:44,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942678405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:44,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:44,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:01:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289622862] [2024-06-27 20:01:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:01:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:01:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:01:44,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:44,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:44,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:44,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:44,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:47,017 INFO L124 PetriNetUnfolderBase]: 11702/16708 cut-off events. [2024-06-27 20:01:47,017 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-27 20:01:47,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33113 conditions, 16708 events. 11702/16708 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 96509 event pairs, 9106 based on Foata normal form. 1/16159 useless extension candidates. Maximal degree in co-relation 33100. Up to 15870 conditions per place. [2024-06-27 20:01:47,120 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:01:47,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-27 20:01:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:01:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:01:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 20:01:47,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-27 20:01:47,131 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-27 20:01:47,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-27 20:01:47,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:01:47,139 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:01:47,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 20:01:47,144 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:01:47,144 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:01:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:47,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:47,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:01:47,145 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)] === [2024-06-27 20:01:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash 481953016, now seen corresponding path program 1 times [2024-06-27 20:01:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589654011] [2024-06-27 20:01:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:48,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589654011] [2024-06-27 20:01:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589654011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:48,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:01:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650723033] [2024-06-27 20:01:48,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:01:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:01:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:01:48,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:48,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:48,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:48,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:50,777 INFO L124 PetriNetUnfolderBase]: 13681/18977 cut-off events. [2024-06-27 20:01:50,777 INFO L125 PetriNetUnfolderBase]: For 3323/3323 co-relation queries the response was YES. [2024-06-27 20:01:50,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42546 conditions, 18977 events. 13681/18977 cut-off events. For 3323/3323 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 105559 event pairs, 9847 based on Foata normal form. 4/18896 useless extension candidates. Maximal degree in co-relation 42534. Up to 18454 conditions per place. [2024-06-27 20:01:50,868 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:01:50,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-27 20:01:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:01:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:01:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 20:01:50,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-27 20:01:50,870 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-27 20:01:50,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-27 20:01:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:01:50,872 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:01:50,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:01:50,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:01:50,873 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:01:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:50,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:50,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:50,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:01:50,874 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)] === [2024-06-27 20:01:50,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2055643426, now seen corresponding path program 1 times [2024-06-27 20:01:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734979775] [2024-06-27 20:01:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:52,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734979775] [2024-06-27 20:01:52,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734979775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:52,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:52,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:01:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116973622] [2024-06-27 20:01:52,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:52,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:01:52,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:01:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:01:52,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:52,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:54,477 INFO L124 PetriNetUnfolderBase]: 13661/18945 cut-off events. [2024-06-27 20:01:54,477 INFO L125 PetriNetUnfolderBase]: For 9431/9431 co-relation queries the response was YES. [2024-06-27 20:01:54,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46993 conditions, 18945 events. 13661/18945 cut-off events. For 9431/9431 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 105295 event pairs, 8023 based on Foata normal form. 8/18872 useless extension candidates. Maximal degree in co-relation 46979. Up to 18384 conditions per place. [2024-06-27 20:01:54,557 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 66 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-27 20:01:54,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 439 flow [2024-06-27 20:01:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:01:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:01:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 20:01:54,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584905660377358 [2024-06-27 20:01:54,559 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 148 transitions. [2024-06-27 20:01:54,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 439 flow [2024-06-27 20:01:54,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 420 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:01:54,563 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 229 flow [2024-06-27 20:01:54,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 20:01:54,563 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-27 20:01:54,563 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 229 flow [2024-06-27 20:01:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:54,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:54,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:54,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:01:54,564 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)] === [2024-06-27 20:01:54,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -207996699, now seen corresponding path program 1 times [2024-06-27 20:01:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:54,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516123545] [2024-06-27 20:01:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:54,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:57,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516123545] [2024-06-27 20:01:57,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516123545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:57,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:57,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:01:57,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115485258] [2024-06-27 20:01:57,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:57,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:01:57,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:57,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:01:57,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:01:57,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:01:57,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:57,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:57,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:01:57,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:59,437 INFO L124 PetriNetUnfolderBase]: 13645/18917 cut-off events. [2024-06-27 20:01:59,437 INFO L125 PetriNetUnfolderBase]: For 18206/18206 co-relation queries the response was YES. [2024-06-27 20:01:59,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51403 conditions, 18917 events. 13645/18917 cut-off events. For 18206/18206 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 105189 event pairs, 6990 based on Foata normal form. 8/18848 useless extension candidates. Maximal degree in co-relation 51388. Up to 18318 conditions per place. [2024-06-27 20:01:59,535 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-27 20:01:59,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 523 flow [2024-06-27 20:01:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 20:01:59,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-27 20:01:59,537 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 229 flow. Second operand 6 states and 171 transitions. [2024-06-27 20:01:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 523 flow [2024-06-27 20:01:59,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 490 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:01:59,543 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 260 flow [2024-06-27 20:01:59,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-27 20:01:59,543 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-27 20:01:59,543 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 260 flow [2024-06-27 20:01:59,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:59,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:59,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:01:59,544 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)] === [2024-06-27 20:01:59,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1242635156, now seen corresponding path program 1 times [2024-06-27 20:01:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:59,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632173307] [2024-06-27 20:01:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:59,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:00,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632173307] [2024-06-27 20:02:00,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632173307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:00,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:00,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:00,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433170858] [2024-06-27 20:02:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:00,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:01,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:02:01,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 260 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) [2024-06-27 20:02:01,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:01,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:02:01,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:02,994 INFO L124 PetriNetUnfolderBase]: 11647/16644 cut-off events. [2024-06-27 20:02:02,995 INFO L125 PetriNetUnfolderBase]: For 24372/24372 co-relation queries the response was YES. [2024-06-27 20:02:03,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48072 conditions, 16644 events. 11647/16644 cut-off events. For 24372/24372 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 96198 event pairs, 7090 based on Foata normal form. 3/16360 useless extension candidates. Maximal degree in co-relation 48055. Up to 15777 conditions per place. [2024-06-27 20:02:03,079 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:02:03,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 472 flow [2024-06-27 20:02:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 20:02:03,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-27 20:02:03,083 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 260 flow. Second operand 5 states and 123 transitions. [2024-06-27 20:02:03,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 472 flow [2024-06-27 20:02:03,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 426 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:03,092 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 279 flow [2024-06-27 20:02:03,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 20:02:03,108 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 20:02:03,109 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 279 flow [2024-06-27 20:02:03,109 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) [2024-06-27 20:02:03,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:03,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:03,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:02:03,109 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)] === [2024-06-27 20:02:03,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash 173235772, now seen corresponding path program 1 times [2024-06-27 20:02:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:03,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198380897] [2024-06-27 20:02:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198380897] [2024-06-27 20:02:04,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198380897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:04,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:04,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590251301] [2024-06-27 20:02:04,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:04,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:02:04,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 279 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) [2024-06-27 20:02:04,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:04,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:02:04,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:06,835 INFO L124 PetriNetUnfolderBase]: 11620/16610 cut-off events. [2024-06-27 20:02:06,835 INFO L125 PetriNetUnfolderBase]: For 35320/35320 co-relation queries the response was YES. [2024-06-27 20:02:06,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51659 conditions, 16610 events. 11620/16610 cut-off events. For 35320/35320 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 96008 event pairs, 6772 based on Foata normal form. 9/16332 useless extension candidates. Maximal degree in co-relation 51640. Up to 15696 conditions per place. [2024-06-27 20:02:06,922 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 20:02:06,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 545 flow [2024-06-27 20:02:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:02:06,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-27 20:02:06,924 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 279 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:02:06,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 545 flow [2024-06-27 20:02:06,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 512 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:06,930 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 325 flow [2024-06-27 20:02:06,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 20:02:06,931 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-27 20:02:06,931 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 325 flow [2024-06-27 20:02:06,931 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) [2024-06-27 20:02:06,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:06,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:06,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:02:06,931 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)] === [2024-06-27 20:02:06,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -81323179, now seen corresponding path program 1 times [2024-06-27 20:02:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:06,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752103757] [2024-06-27 20:02:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:06,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752103757] [2024-06-27 20:02:08,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752103757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:08,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:08,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:08,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071209892] [2024-06-27 20:02:08,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:08,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:08,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:08,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:08,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:08,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:08,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:10,776 INFO L124 PetriNetUnfolderBase]: 13631/18994 cut-off events. [2024-06-27 20:02:10,777 INFO L125 PetriNetUnfolderBase]: For 56350/56350 co-relation queries the response was YES. [2024-06-27 20:02:10,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63735 conditions, 18994 events. 13631/18994 cut-off events. For 56350/56350 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 106137 event pairs, 8144 based on Foata normal form. 3/18916 useless extension candidates. Maximal degree in co-relation 63715. Up to 18369 conditions per place. [2024-06-27 20:02:10,888 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 76 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-27 20:02:10,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 611 flow [2024-06-27 20:02:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 20:02:10,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-27 20:02:10,890 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 325 flow. Second operand 6 states and 144 transitions. [2024-06-27 20:02:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 611 flow [2024-06-27 20:02:10,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 564 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:10,899 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 361 flow [2024-06-27 20:02:10,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 20:02:10,899 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:02:10,900 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 361 flow [2024-06-27 20:02:10,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:10,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:10,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:10,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:02:10,900 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)] === [2024-06-27 20:02:10,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1075335825, now seen corresponding path program 2 times [2024-06-27 20:02:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123703608] [2024-06-27 20:02:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123703608] [2024-06-27 20:02:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123703608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339659013] [2024-06-27 20:02:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:12,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:12,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:12,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:12,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:12,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:14,668 INFO L124 PetriNetUnfolderBase]: 13622/18989 cut-off events. [2024-06-27 20:02:14,669 INFO L125 PetriNetUnfolderBase]: For 73629/73643 co-relation queries the response was YES. [2024-06-27 20:02:14,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67912 conditions, 18989 events. 13622/18989 cut-off events. For 73629/73643 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 105932 event pairs, 8148 based on Foata normal form. 15/18918 useless extension candidates. Maximal degree in co-relation 67891. Up to 18327 conditions per place. [2024-06-27 20:02:14,775 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2024-06-27 20:02:14,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 649 flow [2024-06-27 20:02:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 20:02:14,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-27 20:02:14,776 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 361 flow. Second operand 6 states and 143 transitions. [2024-06-27 20:02:14,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 649 flow [2024-06-27 20:02:14,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 598 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:14,788 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 415 flow [2024-06-27 20:02:14,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 20:02:14,788 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-27 20:02:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 415 flow [2024-06-27 20:02:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:02:14,789 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)] === [2024-06-27 20:02:14,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 61260967, now seen corresponding path program 1 times [2024-06-27 20:02:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966689287] [2024-06-27 20:02:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:14,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966689287] [2024-06-27 20:02:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966689287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:16,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334782483] [2024-06-27 20:02:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:16,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:16,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:16,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:16,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:16,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:19,000 INFO L124 PetriNetUnfolderBase]: 13758/19183 cut-off events. [2024-06-27 20:02:19,000 INFO L125 PetriNetUnfolderBase]: For 95082/95090 co-relation queries the response was YES. [2024-06-27 20:02:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72992 conditions, 19183 events. 13758/19183 cut-off events. For 95082/95090 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 106883 event pairs, 7351 based on Foata normal form. 14/19112 useless extension candidates. Maximal degree in co-relation 72970. Up to 18429 conditions per place. [2024-06-27 20:02:19,082 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 97 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-27 20:02:19,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 901 flow [2024-06-27 20:02:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 20:02:19,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-27 20:02:19,084 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 415 flow. Second operand 8 states and 195 transitions. [2024-06-27 20:02:19,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 901 flow [2024-06-27 20:02:19,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 820 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:19,098 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 569 flow [2024-06-27 20:02:19,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-27 20:02:19,098 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:02:19,098 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 569 flow [2024-06-27 20:02:19,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:19,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:19,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:19,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:02:19,099 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)] === [2024-06-27 20:02:19,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1773830685, now seen corresponding path program 2 times [2024-06-27 20:02:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:19,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644458325] [2024-06-27 20:02:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:19,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644458325] [2024-06-27 20:02:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644458325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:20,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:20,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086892029] [2024-06-27 20:02:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:20,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:20,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:20,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:20,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:20,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:20,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:23,512 INFO L124 PetriNetUnfolderBase]: 13802/19242 cut-off events. [2024-06-27 20:02:23,512 INFO L125 PetriNetUnfolderBase]: For 119755/119767 co-relation queries the response was YES. [2024-06-27 20:02:23,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79001 conditions, 19242 events. 13802/19242 cut-off events. For 119755/119767 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 107019 event pairs, 7227 based on Foata normal form. 18/19175 useless extension candidates. Maximal degree in co-relation 78975. Up to 18451 conditions per place. [2024-06-27 20:02:23,616 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 95 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 20:02:23,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 142 transitions, 1075 flow [2024-06-27 20:02:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 20:02:23,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-27 20:02:23,618 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 569 flow. Second operand 7 states and 171 transitions. [2024-06-27 20:02:23,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 142 transitions, 1075 flow [2024-06-27 20:02:23,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 998 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:23,641 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 716 flow [2024-06-27 20:02:23,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-27 20:02:23,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 20:02:23,641 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 716 flow [2024-06-27 20:02:23,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:23,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:23,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:02:23,642 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)] === [2024-06-27 20:02:23,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1196105591, now seen corresponding path program 3 times [2024-06-27 20:02:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:23,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661293525] [2024-06-27 20:02:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:25,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:25,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661293525] [2024-06-27 20:02:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661293525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:25,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371700998] [2024-06-27 20:02:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:25,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:25,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:25,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:25,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:28,030 INFO L124 PetriNetUnfolderBase]: 13877/19293 cut-off events. [2024-06-27 20:02:28,030 INFO L125 PetriNetUnfolderBase]: For 150730/150730 co-relation queries the response was YES. [2024-06-27 20:02:28,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84915 conditions, 19293 events. 13877/19293 cut-off events. For 150730/150730 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 107242 event pairs, 7117 based on Foata normal form. 6/19219 useless extension candidates. Maximal degree in co-relation 84887. Up to 18474 conditions per place. [2024-06-27 20:02:28,159 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 94 selfloop transitions, 49 changer transitions 0/149 dead transitions. [2024-06-27 20:02:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 149 transitions, 1312 flow [2024-06-27 20:02:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 20:02:28,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-27 20:02:28,160 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 716 flow. Second operand 7 states and 174 transitions. [2024-06-27 20:02:28,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 149 transitions, 1312 flow [2024-06-27 20:02:28,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 1191 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:28,195 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 850 flow [2024-06-27 20:02:28,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-27 20:02:28,195 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-27 20:02:28,195 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 850 flow [2024-06-27 20:02:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:28,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:28,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:28,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:02:28,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:28,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1196105405, now seen corresponding path program 1 times [2024-06-27 20:02:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:28,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491579973] [2024-06-27 20:02:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:30,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491579973] [2024-06-27 20:02:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491579973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:30,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:30,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438407206] [2024-06-27 20:02:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:30,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:30,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:30,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:30,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:30,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:30,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:30,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:32,813 INFO L124 PetriNetUnfolderBase]: 13921/19332 cut-off events. [2024-06-27 20:02:32,813 INFO L125 PetriNetUnfolderBase]: For 152875/152887 co-relation queries the response was YES. [2024-06-27 20:02:32,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84332 conditions, 19332 events. 13921/19332 cut-off events. For 152875/152887 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 107098 event pairs, 6996 based on Foata normal form. 18/19261 useless extension candidates. Maximal degree in co-relation 84303. Up to 18721 conditions per place. [2024-06-27 20:02:32,946 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 124 selfloop transitions, 22 changer transitions 0/152 dead transitions. [2024-06-27 20:02:32,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1320 flow [2024-06-27 20:02:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 20:02:32,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-27 20:02:32,948 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 850 flow. Second operand 7 states and 167 transitions. [2024-06-27 20:02:32,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1320 flow [2024-06-27 20:02:33,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 1241 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:33,019 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 888 flow [2024-06-27 20:02:33,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=888, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-27 20:02:33,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 20:02:33,020 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 888 flow [2024-06-27 20:02:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:33,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:33,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:02:33,021 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)] === [2024-06-27 20:02:33,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1018974071, now seen corresponding path program 4 times [2024-06-27 20:02:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359889339] [2024-06-27 20:02:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:33,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:34,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359889339] [2024-06-27 20:02:34,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359889339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:34,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:34,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151479280] [2024-06-27 20:02:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 888 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:37,461 INFO L124 PetriNetUnfolderBase]: 13903/19360 cut-off events. [2024-06-27 20:02:37,461 INFO L125 PetriNetUnfolderBase]: For 176191/176205 co-relation queries the response was YES. [2024-06-27 20:02:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88505 conditions, 19360 events. 13903/19360 cut-off events. For 176191/176205 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 107430 event pairs, 7028 based on Foata normal form. 14/19280 useless extension candidates. Maximal degree in co-relation 88474. Up to 18450 conditions per place. [2024-06-27 20:02:37,564 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 90 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-27 20:02:37,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 155 transitions, 1432 flow [2024-06-27 20:02:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 20:02:37,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-27 20:02:37,565 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 888 flow. Second operand 7 states and 173 transitions. [2024-06-27 20:02:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 155 transitions, 1432 flow [2024-06-27 20:02:37,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 1347 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:37,614 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 1008 flow [2024-06-27 20:02:37,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1008, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-27 20:02:37,615 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-27 20:02:37,615 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 1008 flow [2024-06-27 20:02:37,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:37,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:37,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:37,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:02:37,616 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)] === [2024-06-27 20:02:37,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1024325699, now seen corresponding path program 2 times [2024-06-27 20:02:37,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:37,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032482542] [2024-06-27 20:02:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032482542] [2024-06-27 20:02:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032482542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:39,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:39,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984768348] [2024-06-27 20:02:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:39,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 1008 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:39,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:39,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:39,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:42,200 INFO L124 PetriNetUnfolderBase]: 13969/19448 cut-off events. [2024-06-27 20:02:42,200 INFO L125 PetriNetUnfolderBase]: For 210646/210675 co-relation queries the response was YES. [2024-06-27 20:02:42,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93488 conditions, 19448 events. 13969/19448 cut-off events. For 210646/210675 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 107942 event pairs, 7022 based on Foata normal form. 35/19391 useless extension candidates. Maximal degree in co-relation 93456. Up to 18742 conditions per place. [2024-06-27 20:02:42,324 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 124 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-27 20:02:42,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 159 transitions, 1502 flow [2024-06-27 20:02:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 20:02:42,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-27 20:02:42,325 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 1008 flow. Second operand 7 states and 167 transitions. [2024-06-27 20:02:42,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 159 transitions, 1502 flow [2024-06-27 20:02:42,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1329 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:42,387 INFO L231 Difference]: Finished difference. Result has 95 places, 123 transitions, 978 flow [2024-06-27 20:02:42,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=978, PETRI_PLACES=95, PETRI_TRANSITIONS=123} [2024-06-27 20:02:42,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 20:02:42,388 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 123 transitions, 978 flow [2024-06-27 20:02:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:42,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:42,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:42,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:02:42,389 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)] === [2024-06-27 20:02:42,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1018736735, now seen corresponding path program 3 times [2024-06-27 20:02:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:42,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763489473] [2024-06-27 20:02:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:44,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763489473] [2024-06-27 20:02:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763489473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:44,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735342735] [2024-06-27 20:02:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:44,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:44,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:44,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 123 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:44,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:44,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:44,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:46,877 INFO L124 PetriNetUnfolderBase]: 13973/19425 cut-off events. [2024-06-27 20:02:46,877 INFO L125 PetriNetUnfolderBase]: For 242321/242350 co-relation queries the response was YES. [2024-06-27 20:02:46,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97390 conditions, 19425 events. 13973/19425 cut-off events. For 242321/242350 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 108221 event pairs, 6547 based on Foata normal form. 35/19425 useless extension candidates. Maximal degree in co-relation 97357. Up to 18594 conditions per place. [2024-06-27 20:02:47,013 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 43 changer transitions 0/172 dead transitions. [2024-06-27 20:02:47,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1670 flow [2024-06-27 20:02:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 20:02:47,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-27 20:02:47,015 INFO L175 Difference]: Start difference. First operand has 95 places, 123 transitions, 978 flow. Second operand 7 states and 173 transitions. [2024-06-27 20:02:47,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1670 flow [2024-06-27 20:02:47,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 172 transitions, 1565 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:47,111 INFO L231 Difference]: Finished difference. Result has 97 places, 131 transitions, 1126 flow [2024-06-27 20:02:47,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1126, PETRI_PLACES=97, PETRI_TRANSITIONS=131} [2024-06-27 20:02:47,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-27 20:02:47,112 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 131 transitions, 1126 flow [2024-06-27 20:02:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:47,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:47,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:02:47,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:47,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1976611076, now seen corresponding path program 1 times [2024-06-27 20:02:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040988020] [2024-06-27 20:02:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040988020] [2024-06-27 20:02:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040988020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028347748] [2024-06-27 20:02:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:48,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:02:48,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 1126 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) [2024-06-27 20:02:48,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:48,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:02:48,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:50,537 INFO L124 PetriNetUnfolderBase]: 11977/17691 cut-off events. [2024-06-27 20:02:50,537 INFO L125 PetriNetUnfolderBase]: For 229793/229793 co-relation queries the response was YES. [2024-06-27 20:02:50,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89718 conditions, 17691 events. 11977/17691 cut-off events. For 229793/229793 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 107253 event pairs, 5878 based on Foata normal form. 2/17664 useless extension candidates. Maximal degree in co-relation 89684. Up to 16238 conditions per place. [2024-06-27 20:02:50,654 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 132 selfloop transitions, 10 changer transitions 0/149 dead transitions. [2024-06-27 20:02:50,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 1504 flow [2024-06-27 20:02:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:02:50,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-27 20:02:50,655 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 1126 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:02:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 1504 flow [2024-06-27 20:02:50,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 149 transitions, 1412 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:50,787 INFO L231 Difference]: Finished difference. Result has 99 places, 135 transitions, 1121 flow [2024-06-27 20:02:50,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1121, PETRI_PLACES=99, PETRI_TRANSITIONS=135} [2024-06-27 20:02:50,788 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-27 20:02:50,788 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 135 transitions, 1121 flow [2024-06-27 20:02:50,788 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) [2024-06-27 20:02:50,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:50,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:02:50,789 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)] === [2024-06-27 20:02:50,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash -845911884, now seen corresponding path program 1 times [2024-06-27 20:02:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008505888] [2024-06-27 20:02:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:50,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008505888] [2024-06-27 20:02:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008505888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:52,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:52,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424159564] [2024-06-27 20:02:52,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:52,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 1121 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) [2024-06-27 20:02:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:53,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:56,039 INFO L124 PetriNetUnfolderBase]: 13957/19695 cut-off events. [2024-06-27 20:02:56,039 INFO L125 PetriNetUnfolderBase]: For 294956/294968 co-relation queries the response was YES. [2024-06-27 20:02:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105612 conditions, 19695 events. 13957/19695 cut-off events. For 294956/294968 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 111361 event pairs, 6996 based on Foata normal form. 15/19702 useless extension candidates. Maximal degree in co-relation 105576. Up to 18641 conditions per place. [2024-06-27 20:02:56,178 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 125 selfloop transitions, 43 changer transitions 0/174 dead transitions. [2024-06-27 20:02:56,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 174 transitions, 1589 flow [2024-06-27 20:02:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 20:02:56,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-27 20:02:56,179 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 1121 flow. Second operand 7 states and 171 transitions. [2024-06-27 20:02:56,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 174 transitions, 1589 flow [2024-06-27 20:02:56,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1498 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:56,297 INFO L231 Difference]: Finished difference. Result has 103 places, 135 transitions, 1139 flow [2024-06-27 20:02:56,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1139, PETRI_PLACES=103, PETRI_TRANSITIONS=135} [2024-06-27 20:02:56,298 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-27 20:02:56,298 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 135 transitions, 1139 flow [2024-06-27 20:02:56,298 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) [2024-06-27 20:02:56,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:56,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:02:56,298 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)] === [2024-06-27 20:02:56,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1571715367, now seen corresponding path program 1 times [2024-06-27 20:02:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:56,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597712878] [2024-06-27 20:02:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:58,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:58,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597712878] [2024-06-27 20:02:58,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597712878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:58,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:58,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851259347] [2024-06-27 20:02:58,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:58,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:58,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:02:58,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 1139 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) [2024-06-27 20:02:58,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:58,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:02:58,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:01,444 INFO L124 PetriNetUnfolderBase]: 14045/19737 cut-off events. [2024-06-27 20:03:01,444 INFO L125 PetriNetUnfolderBase]: For 323432/323444 co-relation queries the response was YES. [2024-06-27 20:03:01,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107955 conditions, 19737 events. 14045/19737 cut-off events. For 323432/323444 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 111198 event pairs, 6881 based on Foata normal form. 24/19746 useless extension candidates. Maximal degree in co-relation 107918. Up to 18692 conditions per place. [2024-06-27 20:03:01,607 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 136 selfloop transitions, 45 changer transitions 0/187 dead transitions. [2024-06-27 20:03:01,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1737 flow [2024-06-27 20:03:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 20:03:01,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-27 20:03:01,612 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 1139 flow. Second operand 8 states and 195 transitions. [2024-06-27 20:03:01,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1737 flow [2024-06-27 20:03:01,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 187 transitions, 1639 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:01,759 INFO L231 Difference]: Finished difference. Result has 105 places, 139 transitions, 1227 flow [2024-06-27 20:03:01,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=105, PETRI_TRANSITIONS=139} [2024-06-27 20:03:01,759 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-27 20:03:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 139 transitions, 1227 flow [2024-06-27 20:03:01,759 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) [2024-06-27 20:03:01,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:01,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:01,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:03:01,760 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)] === [2024-06-27 20:03:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1575434437, now seen corresponding path program 2 times [2024-06-27 20:03:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:01,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551162623] [2024-06-27 20:03:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551162623] [2024-06-27 20:03:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551162623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136394489] [2024-06-27 20:03:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:04,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:04,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 139 transitions, 1227 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) [2024-06-27 20:03:04,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:04,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:04,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:07,843 INFO L124 PetriNetUnfolderBase]: 14133/19866 cut-off events. [2024-06-27 20:03:07,843 INFO L125 PetriNetUnfolderBase]: For 365228/365228 co-relation queries the response was YES. [2024-06-27 20:03:07,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113198 conditions, 19866 events. 14133/19866 cut-off events. For 365228/365228 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 111984 event pairs, 6911 based on Foata normal form. 12/19863 useless extension candidates. Maximal degree in co-relation 113160. Up to 18752 conditions per place. [2024-06-27 20:03:07,990 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-27 20:03:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1813 flow [2024-06-27 20:03:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 20:03:07,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-27 20:03:07,999 INFO L175 Difference]: Start difference. First operand has 105 places, 139 transitions, 1227 flow. Second operand 8 states and 195 transitions. [2024-06-27 20:03:08,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1813 flow [2024-06-27 20:03:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1661 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:08,132 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1284 flow [2024-06-27 20:03:08,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1284, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-27 20:03:08,133 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-27 20:03:08,133 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1284 flow [2024-06-27 20:03:08,133 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) [2024-06-27 20:03:08,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:08,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:08,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:03:08,133 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)] === [2024-06-27 20:03:08,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1575440017, now seen corresponding path program 3 times [2024-06-27 20:03:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:08,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891150333] [2024-06-27 20:03:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891150333] [2024-06-27 20:03:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891150333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:10,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852884933] [2024-06-27 20:03:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:10,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:10,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:10,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1284 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) [2024-06-27 20:03:10,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:10,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:10,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:13,600 INFO L124 PetriNetUnfolderBase]: 14339/20139 cut-off events. [2024-06-27 20:03:13,600 INFO L125 PetriNetUnfolderBase]: For 415705/415717 co-relation queries the response was YES. [2024-06-27 20:03:13,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119427 conditions, 20139 events. 14339/20139 cut-off events. For 415705/415717 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 113093 event pairs, 6927 based on Foata normal form. 30/20154 useless extension candidates. Maximal degree in co-relation 119388. Up to 19117 conditions per place. [2024-06-27 20:03:13,726 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 162 selfloop transitions, 34 changer transitions 0/202 dead transitions. [2024-06-27 20:03:13,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 202 transitions, 2136 flow [2024-06-27 20:03:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 20:03:13,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-27 20:03:13,728 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1284 flow. Second operand 8 states and 198 transitions. [2024-06-27 20:03:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 202 transitions, 2136 flow [2024-06-27 20:03:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 202 transitions, 1959 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:13,878 INFO L231 Difference]: Finished difference. Result has 109 places, 152 transitions, 1390 flow [2024-06-27 20:03:13,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1390, PETRI_PLACES=109, PETRI_TRANSITIONS=152} [2024-06-27 20:03:13,878 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-27 20:03:13,878 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 152 transitions, 1390 flow [2024-06-27 20:03:13,878 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) [2024-06-27 20:03:13,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:13,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:03:13,879 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)] === [2024-06-27 20:03:13,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1523417455, now seen corresponding path program 4 times [2024-06-27 20:03:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:13,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234567556] [2024-06-27 20:03:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:13,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234567556] [2024-06-27 20:03:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234567556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:16,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:16,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972355305] [2024-06-27 20:03:16,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:16,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:16,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:16,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 152 transitions, 1390 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) [2024-06-27 20:03:16,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:16,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:16,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:19,555 INFO L124 PetriNetUnfolderBase]: 14533/20413 cut-off events. [2024-06-27 20:03:19,556 INFO L125 PetriNetUnfolderBase]: For 471415/471444 co-relation queries the response was YES. [2024-06-27 20:03:19,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126225 conditions, 20413 events. 14533/20413 cut-off events. For 471415/471444 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 114821 event pairs, 6963 based on Foata normal form. 44/20440 useless extension candidates. Maximal degree in co-relation 126185. Up to 19360 conditions per place. [2024-06-27 20:03:19,711 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 166 selfloop transitions, 38 changer transitions 0/210 dead transitions. [2024-06-27 20:03:19,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 210 transitions, 2286 flow [2024-06-27 20:03:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 20:03:19,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-27 20:03:19,712 INFO L175 Difference]: Start difference. First operand has 109 places, 152 transitions, 1390 flow. Second operand 8 states and 197 transitions. [2024-06-27 20:03:19,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 210 transitions, 2286 flow [2024-06-27 20:03:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2168 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:19,905 INFO L231 Difference]: Finished difference. Result has 113 places, 161 transitions, 1580 flow [2024-06-27 20:03:19,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1580, PETRI_PLACES=113, PETRI_TRANSITIONS=161} [2024-06-27 20:03:19,905 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-27 20:03:19,905 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 161 transitions, 1580 flow [2024-06-27 20:03:19,905 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) [2024-06-27 20:03:19,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:19,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:03:19,906 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:03:19,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1523423035, now seen corresponding path program 5 times [2024-06-27 20:03:19,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704570194] [2024-06-27 20:03:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:22,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704570194] [2024-06-27 20:03:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704570194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:22,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:22,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066424599] [2024-06-27 20:03:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:22,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 161 transitions, 1580 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) [2024-06-27 20:03:22,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:22,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:25,381 INFO L124 PetriNetUnfolderBase]: 14621/20539 cut-off events. [2024-06-27 20:03:25,381 INFO L125 PetriNetUnfolderBase]: For 524619/524633 co-relation queries the response was YES. [2024-06-27 20:03:25,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131545 conditions, 20539 events. 14621/20539 cut-off events. For 524619/524633 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 115339 event pairs, 6986 based on Foata normal form. 20/20540 useless extension candidates. Maximal degree in co-relation 131503. Up to 19358 conditions per place. [2024-06-27 20:03:25,527 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 138 selfloop transitions, 63 changer transitions 0/207 dead transitions. [2024-06-27 20:03:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 207 transitions, 2224 flow [2024-06-27 20:03:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 20:03:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-27 20:03:25,529 INFO L175 Difference]: Start difference. First operand has 113 places, 161 transitions, 1580 flow. Second operand 8 states and 194 transitions. [2024-06-27 20:03:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 207 transitions, 2224 flow [2024-06-27 20:03:25,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 207 transitions, 2080 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:25,707 INFO L231 Difference]: Finished difference. Result has 117 places, 165 transitions, 1689 flow [2024-06-27 20:03:25,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1689, PETRI_PLACES=117, PETRI_TRANSITIONS=165} [2024-06-27 20:03:25,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-27 20:03:25,707 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 165 transitions, 1689 flow [2024-06-27 20:03:25,707 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) [2024-06-27 20:03:25,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:25,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:03:25,708 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)] === [2024-06-27 20:03:25,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1516065805, now seen corresponding path program 6 times [2024-06-27 20:03:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:25,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544443423] [2024-06-27 20:03:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:25,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544443423] [2024-06-27 20:03:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544443423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:27,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:27,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:27,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6100960] [2024-06-27 20:03:27,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:27,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:28,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:28,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 1689 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) [2024-06-27 20:03:28,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:28,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:28,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:31,672 INFO L124 PetriNetUnfolderBase]: 14753/20781 cut-off events. [2024-06-27 20:03:31,672 INFO L125 PetriNetUnfolderBase]: For 576647/576676 co-relation queries the response was YES. [2024-06-27 20:03:31,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137051 conditions, 20781 events. 14753/20781 cut-off events. For 576647/576676 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 116938 event pairs, 6492 based on Foata normal form. 44/20822 useless extension candidates. Maximal degree in co-relation 137007. Up to 19194 conditions per place. [2024-06-27 20:03:31,807 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 158 selfloop transitions, 65 changer transitions 0/229 dead transitions. [2024-06-27 20:03:31,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 229 transitions, 2821 flow [2024-06-27 20:03:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 20:03:31,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-27 20:03:31,808 INFO L175 Difference]: Start difference. First operand has 117 places, 165 transitions, 1689 flow. Second operand 8 states and 205 transitions. [2024-06-27 20:03:31,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 229 transitions, 2821 flow [2024-06-27 20:03:31,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 229 transitions, 2600 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:31,986 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1862 flow [2024-06-27 20:03:31,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1862, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2024-06-27 20:03:31,987 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 20:03:31,987 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1862 flow [2024-06-27 20:03:31,987 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) [2024-06-27 20:03:31,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:31,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:31,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:03:31,987 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)] === [2024-06-27 20:03:31,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1515788758, now seen corresponding path program 1 times [2024-06-27 20:03:31,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:31,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79197299] [2024-06-27 20:03:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:31,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:35,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:35,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79197299] [2024-06-27 20:03:35,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79197299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:35,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:35,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104439098] [2024-06-27 20:03:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:35,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:35,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:03:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1862 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) [2024-06-27 20:03:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:03:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:38,778 INFO L124 PetriNetUnfolderBase]: 12749/18570 cut-off events. [2024-06-27 20:03:38,778 INFO L125 PetriNetUnfolderBase]: For 538538/538538 co-relation queries the response was YES. [2024-06-27 20:03:38,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124945 conditions, 18570 events. 12749/18570 cut-off events. For 538538/538538 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 110350 event pairs, 5464 based on Foata normal form. 6/18537 useless extension candidates. Maximal degree in co-relation 124900. Up to 17210 conditions per place. [2024-06-27 20:03:38,904 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 199 selfloop transitions, 25 changer transitions 0/231 dead transitions. [2024-06-27 20:03:38,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 231 transitions, 2618 flow [2024-06-27 20:03:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 20:03:38,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45073375262054505 [2024-06-27 20:03:38,905 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1862 flow. Second operand 9 states and 215 transitions. [2024-06-27 20:03:38,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 231 transitions, 2618 flow [2024-06-27 20:03:39,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 231 transitions, 2333 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:39,125 INFO L231 Difference]: Finished difference. Result has 124 places, 185 transitions, 1821 flow [2024-06-27 20:03:39,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1821, PETRI_PLACES=124, PETRI_TRANSITIONS=185} [2024-06-27 20:03:39,126 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-27 20:03:39,126 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 185 transitions, 1821 flow [2024-06-27 20:03:39,126 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) [2024-06-27 20:03:39,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:39,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:03:39,126 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)] === [2024-06-27 20:03:39,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1475676326, now seen corresponding path program 1 times [2024-06-27 20:03:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269889127] [2024-06-27 20:03:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:41,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269889127] [2024-06-27 20:03:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269889127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:41,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:41,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219530669] [2024-06-27 20:03:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:41,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:41,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:41,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:03:41,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 185 transitions, 1821 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) [2024-06-27 20:03:41,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:41,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:03:41,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:45,288 INFO L124 PetriNetUnfolderBase]: 14774/20723 cut-off events. [2024-06-27 20:03:45,288 INFO L125 PetriNetUnfolderBase]: For 625724/625736 co-relation queries the response was YES. [2024-06-27 20:03:45,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139478 conditions, 20723 events. 14774/20723 cut-off events. For 625724/625736 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 116159 event pairs, 5599 based on Foata normal form. 18/20738 useless extension candidates. Maximal degree in co-relation 139431. Up to 19760 conditions per place. [2024-06-27 20:03:45,443 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 192 selfloop transitions, 37 changer transitions 0/235 dead transitions. [2024-06-27 20:03:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 235 transitions, 2529 flow [2024-06-27 20:03:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 20:03:45,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-27 20:03:45,444 INFO L175 Difference]: Start difference. First operand has 124 places, 185 transitions, 1821 flow. Second operand 8 states and 192 transitions. [2024-06-27 20:03:45,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 235 transitions, 2529 flow [2024-06-27 20:03:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 235 transitions, 2391 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:45,700 INFO L231 Difference]: Finished difference. Result has 127 places, 188 transitions, 1869 flow [2024-06-27 20:03:45,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1869, PETRI_PLACES=127, PETRI_TRANSITIONS=188} [2024-06-27 20:03:45,701 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 20:03:45,701 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 188 transitions, 1869 flow [2024-06-27 20:03:45,701 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) [2024-06-27 20:03:45,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:45,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:45,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:03:45,701 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)] === [2024-06-27 20:03:45,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1475736776, now seen corresponding path program 2 times [2024-06-27 20:03:45,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:45,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295572360] [2024-06-27 20:03:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:45,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat