./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix010.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix010.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:37:15,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:37:15,975 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:37:15,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:37:15,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:37:15,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:37:15,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:37:15,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:37:15,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:37:15,993 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:37:15,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:37:15,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:37:15,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:37:15,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:37:15,994 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:37:15,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:37:15,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:37:15,995 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:37:15,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:37:15,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:37:15,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:37:15,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:37:15,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:37:15,997 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:37:15,997 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:37:15,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:37:15,998 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:37:15,998 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:37:15,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:37:15,999 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:37:15,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:37:15,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:37:15,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:37:16,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:37:16,000 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:37:16,000 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:37:16,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:37:16,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:37:16,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:37:16,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:37:16,001 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:37:16,002 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:37:16,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:37:16,002 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:37:16,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:37:16,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:37:16,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:37:16,272 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:37:16,273 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:37:16,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix010.opt.yml/witness.yml [2024-06-21 20:37:16,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:37:16,448 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:37:16,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-21 20:37:17,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:37:17,615 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:37:17,619 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-21 20:37:17,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f4e8bef/0ca077c863404acc8ed48968e03e383c/FLAGe7b04ebe0 [2024-06-21 20:37:17,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f4e8bef/0ca077c863404acc8ed48968e03e383c [2024-06-21 20:37:17,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:37:17,660 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:37:17,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:37:17,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:37:17,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:37:17,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:16" (1/2) ... [2024-06-21 20:37:17,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcbefd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:37:17, skipping insertion in model container [2024-06-21 20:37:17,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:16" (1/2) ... [2024-06-21 20:37:17,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3963bc2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:37:17, skipping insertion in model container [2024-06-21 20:37:17,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:37:17" (2/2) ... [2024-06-21 20:37:17,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcbefd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:17, skipping insertion in model container [2024-06-21 20:37:17,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:37:17" (2/2) ... [2024-06-21 20:37:17,670 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:37:17,759 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:37:17,760 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:37:17,760 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:37:17,760 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:37:17,760 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:37:17,760 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 20:37:17,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:37:18,123 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:37:18,132 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:37:18,258 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:37:18,297 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:37:18,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18 WrapperNode [2024-06-21 20:37:18,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:37:18,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:37:18,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:37:18,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:37:18,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,373 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 20:37:18,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:37:18,374 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:37:18,374 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:37:18,374 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:37:18,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,399 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:37:18,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:37:18,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:37:18,470 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:37:18,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:37:18,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (1/1) ... [2024-06-21 20:37:18,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:37:18,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:37:18,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:37:18,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:37:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:37:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:37:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:37:18,541 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:37:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:37:18,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:37:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:37:18,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:37:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:37:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:37:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:37:18,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:37:18,547 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:37:18,680 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:37:18,682 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:37:19,033 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:37:19,034 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:37:19,202 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:37:19,203 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:37:19,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:37:19 BoogieIcfgContainer [2024-06-21 20:37:19,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:37:19,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:37:19,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:37:19,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:37:19,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:16" (1/4) ... [2024-06-21 20:37:19,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b2610c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:37:19, skipping insertion in model container [2024-06-21 20:37:19,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:37:17" (2/4) ... [2024-06-21 20:37:19,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b2610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:37:19, skipping insertion in model container [2024-06-21 20:37:19,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:18" (3/4) ... [2024-06-21 20:37:19,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b2610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:37:19, skipping insertion in model container [2024-06-21 20:37:19,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:37:19" (4/4) ... [2024-06-21 20:37:19,209 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-06-21 20:37:19,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:37:19,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:37:19,222 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:37:19,254 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:37:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:37:19,295 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 20:37:19,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:37:19,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:37:19,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:37:19,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 20:37:19,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:37:19,310 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;@3f9964c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:37:19,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:37:19,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:37:19,313 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:37:19,313 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:37:19,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:19,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:37:19,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:19,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash 402657065, now seen corresponding path program 1 times [2024-06-21 20:37:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:19,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463576930] [2024-06-21 20:37:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463576930] [2024-06-21 20:37:20,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463576930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:20,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:37:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113977996] [2024-06-21 20:37:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:37:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:37:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:37:20,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-21 20:37:20,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:20,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:20,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-21 20:37:20,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:20,659 INFO L124 PetriNetUnfolderBase]: 1059/1701 cut-off events. [2024-06-21 20:37:20,659 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 20:37:20,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1701 events. 1059/1701 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8888 event pairs, 698 based on Foata normal form. 1/1644 useless extension candidates. Maximal degree in co-relation 3353. Up to 1593 conditions per place. [2024-06-21 20:37:20,673 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 20:37:20,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 173 flow [2024-06-21 20:37:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:37:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:37:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 20:37:20,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-21 20:37:20,684 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 83 transitions. [2024-06-21 20:37:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 173 flow [2024-06-21 20:37:20,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:20,689 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 20:37:20,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 20:37:20,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 20:37:20,693 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 20:37:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:20,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:37:20,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 407527642, now seen corresponding path program 1 times [2024-06-21 20:37:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542665671] [2024-06-21 20:37:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:20,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542665671] [2024-06-21 20:37:21,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542665671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:21,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:21,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:37:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458925562] [2024-06-21 20:37:21,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:37:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:37:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:37:21,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:37:21,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:21,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:21,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:37:21,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:21,722 INFO L124 PetriNetUnfolderBase]: 1215/1890 cut-off events. [2024-06-21 20:37:21,722 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-21 20:37:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1890 events. 1215/1890 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9639 event pairs, 648 based on Foata normal form. 3/1888 useless extension candidates. Maximal degree in co-relation 4289. Up to 1803 conditions per place. [2024-06-21 20:37:21,731 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 20:37:21,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-21 20:37:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:37:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:37:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 20:37:21,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 20:37:21,733 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-21 20:37:21,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-21 20:37:21,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:37:21,736 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 20:37:21,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 20:37:21,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 20:37:21,737 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 20:37:21,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:21,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:21,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:21,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:37:21,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:21,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1215866847, now seen corresponding path program 1 times [2024-06-21 20:37:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764846823] [2024-06-21 20:37:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:22,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764846823] [2024-06-21 20:37:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764846823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:37:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163179579] [2024-06-21 20:37:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:37:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:37:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:37:22,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:22,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:22,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:22,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:23,185 INFO L124 PetriNetUnfolderBase]: 1545/2363 cut-off events. [2024-06-21 20:37:23,185 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-21 20:37:23,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5935 conditions, 2363 events. 1545/2363 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11699 event pairs, 575 based on Foata normal form. 6/2358 useless extension candidates. Maximal degree in co-relation 5921. Up to 2233 conditions per place. [2024-06-21 20:37:23,196 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-21 20:37:23,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 354 flow [2024-06-21 20:37:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:37:23,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 20:37:23,199 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:37:23,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 354 flow [2024-06-21 20:37:23,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 334 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:37:23,210 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 20:37:23,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 20:37:23,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 20:37:23,211 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 20:37:23,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:23,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:23,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:23,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:37:23,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:23,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash -532318793, now seen corresponding path program 1 times [2024-06-21 20:37:23,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:23,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927043941] [2024-06-21 20:37:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:23,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927043941] [2024-06-21 20:37:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927043941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:23,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:37:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260763316] [2024-06-21 20:37:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:37:23,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:37:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:37:23,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:37:23,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:23,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:23,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:37:23,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:24,256 INFO L124 PetriNetUnfolderBase]: 1333/2109 cut-off events. [2024-06-21 20:37:24,256 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-21 20:37:24,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5763 conditions, 2109 events. 1333/2109 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10706 event pairs, 592 based on Foata normal form. 2/2080 useless extension candidates. Maximal degree in co-relation 5746. Up to 1980 conditions per place. [2024-06-21 20:37:24,267 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-21 20:37:24,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 327 flow [2024-06-21 20:37:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:37:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:37:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 20:37:24,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:37:24,268 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 105 transitions. [2024-06-21 20:37:24,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 327 flow [2024-06-21 20:37:24,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:24,274 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-21 20:37:24,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-21 20:37:24,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 20:37:24,275 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-21 20:37:24,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:24,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:24,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:24,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:37:24,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:24,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 709268787, now seen corresponding path program 1 times [2024-06-21 20:37:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:24,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972004416] [2024-06-21 20:37:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:24,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972004416] [2024-06-21 20:37:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972004416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:24,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:24,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442481876] [2024-06-21 20:37:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:25,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:25,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 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) [2024-06-21 20:37:25,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:25,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:25,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:25,547 INFO L124 PetriNetUnfolderBase]: 1571/2467 cut-off events. [2024-06-21 20:37:25,547 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-21 20:37:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7210 conditions, 2467 events. 1571/2467 cut-off events. For 3658/3658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12540 event pairs, 706 based on Foata normal form. 2/2460 useless extension candidates. Maximal degree in co-relation 7191. Up to 2317 conditions per place. [2024-06-21 20:37:25,558 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-21 20:37:25,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 374 flow [2024-06-21 20:37:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:37:25,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:37:25,560 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:37:25,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 374 flow [2024-06-21 20:37:25,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:25,562 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-21 20:37:25,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-21 20:37:25,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 20:37:25,563 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-21 20:37:25,563 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) [2024-06-21 20:37:25,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:25,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:37:25,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:25,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash 538200428, now seen corresponding path program 1 times [2024-06-21 20:37:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312626611] [2024-06-21 20:37:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:26,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312626611] [2024-06-21 20:37:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312626611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:26,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:26,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971111317] [2024-06-21 20:37:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:26,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:26,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 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) [2024-06-21 20:37:26,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:26,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:26,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:26,845 INFO L124 PetriNetUnfolderBase]: 1717/2637 cut-off events. [2024-06-21 20:37:26,846 INFO L125 PetriNetUnfolderBase]: For 6206/6212 co-relation queries the response was YES. [2024-06-21 20:37:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8440 conditions, 2637 events. 1717/2637 cut-off events. For 6206/6212 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13148 event pairs, 749 based on Foata normal form. 6/2636 useless extension candidates. Maximal degree in co-relation 8420. Up to 2498 conditions per place. [2024-06-21 20:37:26,860 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 20:37:26,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 482 flow [2024-06-21 20:37:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 20:37:26,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:37:26,862 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 126 transitions. [2024-06-21 20:37:26,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 482 flow [2024-06-21 20:37:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:26,865 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-21 20:37:26,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-21 20:37:26,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 20:37:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-21 20:37:26,866 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) [2024-06-21 20:37:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:26,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:26,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:37:26,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:26,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash 544663928, now seen corresponding path program 2 times [2024-06-21 20:37:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:26,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338134142] [2024-06-21 20:37:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:26,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:27,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:27,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338134142] [2024-06-21 20:37:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338134142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044479206] [2024-06-21 20:37:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:27,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:27,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 290 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) [2024-06-21 20:37:27,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:27,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:27,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:28,069 INFO L124 PetriNetUnfolderBase]: 1712/2631 cut-off events. [2024-06-21 20:37:28,069 INFO L125 PetriNetUnfolderBase]: For 8385/8390 co-relation queries the response was YES. [2024-06-21 20:37:28,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9042 conditions, 2631 events. 1712/2631 cut-off events. For 8385/8390 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13120 event pairs, 752 based on Foata normal form. 6/2630 useless extension candidates. Maximal degree in co-relation 9021. Up to 2493 conditions per place. [2024-06-21 20:37:28,084 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 20:37:28,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 456 flow [2024-06-21 20:37:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:37:28,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 20:37:28,085 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:37:28,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 456 flow [2024-06-21 20:37:28,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:37:28,091 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 296 flow [2024-06-21 20:37:28,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-21 20:37:28,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 20:37:28,092 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 296 flow [2024-06-21 20:37:28,092 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) [2024-06-21 20:37:28,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:28,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:28,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:37:28,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:28,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:28,093 INFO L85 PathProgramCache]: Analyzing trace with hash 512497584, now seen corresponding path program 1 times [2024-06-21 20:37:28,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:28,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196491170] [2024-06-21 20:37:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:28,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196491170] [2024-06-21 20:37:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196491170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:28,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985858432] [2024-06-21 20:37:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:28,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 296 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) [2024-06-21 20:37:28,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:28,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:28,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:29,431 INFO L124 PetriNetUnfolderBase]: 1567/2474 cut-off events. [2024-06-21 20:37:29,432 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-21 20:37:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 2474 events. 1567/2474 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12587 event pairs, 652 based on Foata normal form. 4/2467 useless extension candidates. Maximal degree in co-relation 8406. Up to 2294 conditions per place. [2024-06-21 20:37:29,473 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-21 20:37:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 516 flow [2024-06-21 20:37:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:37:29,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:37:29,475 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 296 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:37:29,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 516 flow [2024-06-21 20:37:29,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 472 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:29,481 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 318 flow [2024-06-21 20:37:29,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-21 20:37:29,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-21 20:37:29,482 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 318 flow [2024-06-21 20:37:29,482 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) [2024-06-21 20:37:29,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:29,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:29,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:37:29,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:29,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1294959864, now seen corresponding path program 1 times [2024-06-21 20:37:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:29,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767458428] [2024-06-21 20:37:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:29,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:30,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:30,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767458428] [2024-06-21 20:37:30,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767458428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:30,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:30,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:30,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140391972] [2024-06-21 20:37:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:30,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:30,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 318 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) [2024-06-21 20:37:30,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:30,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:30,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:30,902 INFO L124 PetriNetUnfolderBase]: 1713/2636 cut-off events. [2024-06-21 20:37:30,902 INFO L125 PetriNetUnfolderBase]: For 12167/12167 co-relation queries the response was YES. [2024-06-21 20:37:30,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 2636 events. 1713/2636 cut-off events. For 12167/12167 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13140 event pairs, 700 based on Foata normal form. 2/2637 useless extension candidates. Maximal degree in co-relation 9734. Up to 2498 conditions per place. [2024-06-21 20:37:30,913 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-21 20:37:30,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-21 20:37:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:37:30,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 20:37:30,915 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 318 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:37:30,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-21 20:37:30,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 526 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:30,920 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-21 20:37:30,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-21 20:37:30,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 20:37:30,921 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-21 20:37:30,921 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) [2024-06-21 20:37:30,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:30,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:30,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:37:30,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:30,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657458, now seen corresponding path program 1 times [2024-06-21 20:37:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809104291] [2024-06-21 20:37:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809104291] [2024-06-21 20:37:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809104291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:31,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922770150] [2024-06-21 20:37:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:31,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:31,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:31,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:31,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:31,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:32,221 INFO L124 PetriNetUnfolderBase]: 1833/2763 cut-off events. [2024-06-21 20:37:32,221 INFO L125 PetriNetUnfolderBase]: For 15115/15121 co-relation queries the response was YES. [2024-06-21 20:37:32,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10757 conditions, 2763 events. 1833/2763 cut-off events. For 15115/15121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13400 event pairs, 752 based on Foata normal form. 6/2766 useless extension candidates. Maximal degree in co-relation 10733. Up to 2635 conditions per place. [2024-06-21 20:37:32,236 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-21 20:37:32,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 666 flow [2024-06-21 20:37:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:37:32,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:37:32,238 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:37:32,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 666 flow [2024-06-21 20:37:32,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 622 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:32,244 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 412 flow [2024-06-21 20:37:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-21 20:37:32,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 20:37:32,245 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 412 flow [2024-06-21 20:37:32,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:32,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:32,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:32,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:37:32,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:32,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657644, now seen corresponding path program 2 times [2024-06-21 20:37:32,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:32,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550054281] [2024-06-21 20:37:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:32,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:32,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550054281] [2024-06-21 20:37:32,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550054281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:32,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:32,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833165410] [2024-06-21 20:37:32,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:33,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:33,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 412 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) [2024-06-21 20:37:33,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:33,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:33,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:33,616 INFO L124 PetriNetUnfolderBase]: 1739/2682 cut-off events. [2024-06-21 20:37:33,616 INFO L125 PetriNetUnfolderBase]: For 18580/18583 co-relation queries the response was YES. [2024-06-21 20:37:33,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 2682 events. 1739/2682 cut-off events. For 18580/18583 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13446 event pairs, 696 based on Foata normal form. 4/2684 useless extension candidates. Maximal degree in co-relation 11007. Up to 2481 conditions per place. [2024-06-21 20:37:33,630 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 20:37:33,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 758 flow [2024-06-21 20:37:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:37:33,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 20:37:33,632 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 412 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:37:33,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 758 flow [2024-06-21 20:37:33,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 724 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:33,640 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 512 flow [2024-06-21 20:37:33,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-21 20:37:33,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-21 20:37:33,641 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 512 flow [2024-06-21 20:37:33,641 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) [2024-06-21 20:37:33,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:33,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:37:33,642 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:33,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1053965498, now seen corresponding path program 2 times [2024-06-21 20:37:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381484761] [2024-06-21 20:37:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381484761] [2024-06-21 20:37:34,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381484761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:34,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546844279] [2024-06-21 20:37:34,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:34,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:34,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:34,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:34,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:35,041 INFO L124 PetriNetUnfolderBase]: 1855/2804 cut-off events. [2024-06-21 20:37:35,041 INFO L125 PetriNetUnfolderBase]: For 22808/22813 co-relation queries the response was YES. [2024-06-21 20:37:35,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12217 conditions, 2804 events. 1855/2804 cut-off events. For 22808/22813 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13693 event pairs, 751 based on Foata normal form. 6/2808 useless extension candidates. Maximal degree in co-relation 12190. Up to 2663 conditions per place. [2024-06-21 20:37:35,055 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2024-06-21 20:37:35,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 826 flow [2024-06-21 20:37:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:37:35,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:37:35,056 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 512 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:37:35,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 826 flow [2024-06-21 20:37:35,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 782 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:35,067 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 562 flow [2024-06-21 20:37:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 20:37:35,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 20:37:35,068 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 562 flow [2024-06-21 20:37:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:35,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:37:35,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:35,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1292688460, now seen corresponding path program 3 times [2024-06-21 20:37:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095982868] [2024-06-21 20:37:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095982868] [2024-06-21 20:37:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095982868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:35,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:35,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:35,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577208855] [2024-06-21 20:37:35,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:35,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:35,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:35,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:35,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:35,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:35,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:36,428 INFO L124 PetriNetUnfolderBase]: 1850/2797 cut-off events. [2024-06-21 20:37:36,428 INFO L125 PetriNetUnfolderBase]: For 25542/25547 co-relation queries the response was YES. [2024-06-21 20:37:36,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12484 conditions, 2797 events. 1850/2797 cut-off events. For 25542/25547 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13660 event pairs, 751 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 12455. Up to 2658 conditions per place. [2024-06-21 20:37:36,441 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-21 20:37:36,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 792 flow [2024-06-21 20:37:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:37:36,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:37:36,442 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 562 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:37:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 792 flow [2024-06-21 20:37:36,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 714 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:36,457 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 544 flow [2024-06-21 20:37:36,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-21 20:37:36,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 20:37:36,459 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 544 flow [2024-06-21 20:37:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:36,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:36,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:37:36,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:36,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1288526124, now seen corresponding path program 3 times [2024-06-21 20:37:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860986161] [2024-06-21 20:37:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860986161] [2024-06-21 20:37:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860986161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:37,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:37,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:37,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819265787] [2024-06-21 20:37:37,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:37,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:37,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 544 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) [2024-06-21 20:37:37,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:37,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:37,867 INFO L124 PetriNetUnfolderBase]: 1741/2681 cut-off events. [2024-06-21 20:37:37,867 INFO L125 PetriNetUnfolderBase]: For 28404/28404 co-relation queries the response was YES. [2024-06-21 20:37:37,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 2681 events. 1741/2681 cut-off events. For 28404/28404 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13404 event pairs, 707 based on Foata normal form. 2/2679 useless extension candidates. Maximal degree in co-relation 12182. Up to 2483 conditions per place. [2024-06-21 20:37:37,879 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-21 20:37:37,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 764 flow [2024-06-21 20:37:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:37:37,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 20:37:37,881 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 544 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:37:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 764 flow [2024-06-21 20:37:37,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 672 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:37,892 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 512 flow [2024-06-21 20:37:37,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-21 20:37:37,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 20:37:37,893 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 512 flow [2024-06-21 20:37:37,893 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) [2024-06-21 20:37:37,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:37,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:37:37,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1931356471, now seen corresponding path program 1 times [2024-06-21 20:37:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317421957] [2024-06-21 20:37:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:38,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317421957] [2024-06-21 20:37:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317421957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:38,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:38,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:37:38,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183153910] [2024-06-21 20:37:38,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:38,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:37:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:37:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:37:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:38,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:38,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:38,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:38,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:39,053 INFO L124 PetriNetUnfolderBase]: 1387/2313 cut-off events. [2024-06-21 20:37:39,053 INFO L125 PetriNetUnfolderBase]: For 26173/26173 co-relation queries the response was YES. [2024-06-21 20:37:39,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10496 conditions, 2313 events. 1387/2313 cut-off events. For 26173/26173 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12568 event pairs, 589 based on Foata normal form. 1/2313 useless extension candidates. Maximal degree in co-relation 10465. Up to 2046 conditions per place. [2024-06-21 20:37:39,066 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2024-06-21 20:37:39,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 88 transitions, 692 flow [2024-06-21 20:37:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:37:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:37:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 20:37:39,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:37:39,067 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 512 flow. Second operand 5 states and 105 transitions. [2024-06-21 20:37:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 88 transitions, 692 flow [2024-06-21 20:37:39,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 622 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:39,081 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 490 flow [2024-06-21 20:37:39,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-21 20:37:39,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 20:37:39,082 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 490 flow [2024-06-21 20:37:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:39,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:39,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:39,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:37:39,082 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:39,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1805535858, now seen corresponding path program 1 times [2024-06-21 20:37:39,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:39,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127765830] [2024-06-21 20:37:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:39,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127765830] [2024-06-21 20:37:39,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127765830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:39,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:39,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:39,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387903632] [2024-06-21 20:37:39,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:39,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:39,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:40,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:40,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 490 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:40,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:40,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:40,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:40,661 INFO L124 PetriNetUnfolderBase]: 1853/2801 cut-off events. [2024-06-21 20:37:40,662 INFO L125 PetriNetUnfolderBase]: For 34417/34417 co-relation queries the response was YES. [2024-06-21 20:37:40,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 2801 events. 1853/2801 cut-off events. For 34417/34417 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13689 event pairs, 722 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 13351. Up to 2693 conditions per place. [2024-06-21 20:37:40,673 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-21 20:37:40,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 814 flow [2024-06-21 20:37:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:37:40,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:37:40,675 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 490 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:37:40,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 814 flow [2024-06-21 20:37:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 788 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:40,687 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 548 flow [2024-06-21 20:37:40,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-21 20:37:40,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 20:37:40,687 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 548 flow [2024-06-21 20:37:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:40,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:40,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:40,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:37:40,688 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:40,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash 549477099, now seen corresponding path program 1 times [2024-06-21 20:37:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609619940] [2024-06-21 20:37:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609619940] [2024-06-21 20:37:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609619940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:41,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:41,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954340309] [2024-06-21 20:37:41,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:41,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:41,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:41,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 548 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:41,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:42,298 INFO L124 PetriNetUnfolderBase]: 1875/2840 cut-off events. [2024-06-21 20:37:42,298 INFO L125 PetriNetUnfolderBase]: For 39678/39684 co-relation queries the response was YES. [2024-06-21 20:37:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 2840 events. 1875/2840 cut-off events. For 39678/39684 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13909 event pairs, 680 based on Foata normal form. 5/2842 useless extension candidates. Maximal degree in co-relation 14139. Up to 2620 conditions per place. [2024-06-21 20:37:42,312 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 32 changer transitions 0/120 dead transitions. [2024-06-21 20:37:42,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 984 flow [2024-06-21 20:37:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:37:42,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:37:42,313 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 548 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:37:42,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 984 flow [2024-06-21 20:37:42,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 924 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:42,331 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 634 flow [2024-06-21 20:37:42,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2024-06-21 20:37:42,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 20:37:42,332 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 634 flow [2024-06-21 20:37:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:42,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:42,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:37:42,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:42,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash 549476882, now seen corresponding path program 2 times [2024-06-21 20:37:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461979346] [2024-06-21 20:37:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461979346] [2024-06-21 20:37:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461979346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:43,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:43,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:43,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011249231] [2024-06-21 20:37:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:43,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:43,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 634 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:43,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:43,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:43,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:43,896 INFO L124 PetriNetUnfolderBase]: 1902/2888 cut-off events. [2024-06-21 20:37:43,896 INFO L125 PetriNetUnfolderBase]: For 45740/45743 co-relation queries the response was YES. [2024-06-21 20:37:43,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15069 conditions, 2888 events. 1902/2888 cut-off events. For 45740/45743 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14247 event pairs, 708 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 15035. Up to 2642 conditions per place. [2024-06-21 20:37:43,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 44 changer transitions 0/128 dead transitions. [2024-06-21 20:37:43,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1218 flow [2024-06-21 20:37:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:37:43,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:37:43,913 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 634 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:37:43,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1218 flow [2024-06-21 20:37:43,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 1170 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:43,931 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 820 flow [2024-06-21 20:37:43,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=820, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-21 20:37:43,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 20:37:43,932 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 820 flow [2024-06-21 20:37:43,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:43,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:43,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:43,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:37:43,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:43,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1809254928, now seen corresponding path program 3 times [2024-06-21 20:37:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:43,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453912070] [2024-06-21 20:37:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:43,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:44,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:44,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453912070] [2024-06-21 20:37:44,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453912070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:44,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:44,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:44,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205112636] [2024-06-21 20:37:44,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:44,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:44,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:44,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:44,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:44,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:44,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:44,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:44,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:45,518 INFO L124 PetriNetUnfolderBase]: 1897/2881 cut-off events. [2024-06-21 20:37:45,518 INFO L125 PetriNetUnfolderBase]: For 51416/51419 co-relation queries the response was YES. [2024-06-21 20:37:45,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15674 conditions, 2881 events. 1897/2881 cut-off events. For 51416/51419 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14193 event pairs, 708 based on Foata normal form. 4/2882 useless extension candidates. Maximal degree in co-relation 15638. Up to 2637 conditions per place. [2024-06-21 20:37:45,530 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 43 changer transitions 0/126 dead transitions. [2024-06-21 20:37:45,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1202 flow [2024-06-21 20:37:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:37:45,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:37:45,533 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 820 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:37:45,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1202 flow [2024-06-21 20:37:45,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1118 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:45,555 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 830 flow [2024-06-21 20:37:45,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-21 20:37:45,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 20:37:45,556 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 830 flow [2024-06-21 20:37:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:45,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:45,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:37:45,556 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:45,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 239540132, now seen corresponding path program 4 times [2024-06-21 20:37:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533712337] [2024-06-21 20:37:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533712337] [2024-06-21 20:37:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533712337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:46,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:46,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049008004] [2024-06-21 20:37:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:46,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:47,087 INFO L124 PetriNetUnfolderBase]: 1924/2922 cut-off events. [2024-06-21 20:37:47,087 INFO L125 PetriNetUnfolderBase]: For 56958/56958 co-relation queries the response was YES. [2024-06-21 20:37:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16324 conditions, 2922 events. 1924/2922 cut-off events. For 56958/56958 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14383 event pairs, 714 based on Foata normal form. 2/2920 useless extension candidates. Maximal degree in co-relation 16286. Up to 2666 conditions per place. [2024-06-21 20:37:47,104 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 49 changer transitions 0/131 dead transitions. [2024-06-21 20:37:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1408 flow [2024-06-21 20:37:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:37:47,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:37:47,105 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 830 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:37:47,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1408 flow [2024-06-21 20:37:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1290 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:47,135 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 930 flow [2024-06-21 20:37:47,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=930, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-21 20:37:47,135 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 20:37:47,136 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 930 flow [2024-06-21 20:37:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:47,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:47,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:37:47,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:47,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1289596747, now seen corresponding path program 2 times [2024-06-21 20:37:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:47,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17646947] [2024-06-21 20:37:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:47,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:47,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:47,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17646947] [2024-06-21 20:37:47,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17646947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:47,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:47,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:47,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456919834] [2024-06-21 20:37:47,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:47,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:47,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:47,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:47,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 930 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:47,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:47,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:47,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:48,635 INFO L124 PetriNetUnfolderBase]: 1946/2957 cut-off events. [2024-06-21 20:37:48,635 INFO L125 PetriNetUnfolderBase]: For 62290/62295 co-relation queries the response was YES. [2024-06-21 20:37:48,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16719 conditions, 2957 events. 1946/2957 cut-off events. For 62290/62295 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14603 event pairs, 669 based on Foata normal form. 8/2963 useless extension candidates. Maximal degree in co-relation 16680. Up to 2710 conditions per place. [2024-06-21 20:37:48,652 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 35 changer transitions 0/135 dead transitions. [2024-06-21 20:37:48,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1376 flow [2024-06-21 20:37:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:37:48,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:37:48,654 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 930 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:37:48,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1376 flow [2024-06-21 20:37:48,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1234 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:48,677 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 906 flow [2024-06-21 20:37:48,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=906, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-21 20:37:48,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 20:37:48,677 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 906 flow [2024-06-21 20:37:48,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:48,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:48,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:48,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:37:48,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:48,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1411016369, now seen corresponding path program 3 times [2024-06-21 20:37:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:48,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680686173] [2024-06-21 20:37:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:48,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:49,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680686173] [2024-06-21 20:37:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680686173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:49,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:49,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:49,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189549208] [2024-06-21 20:37:49,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:49,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:49,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:49,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:49,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:49,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:49,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:49,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:50,208 INFO L124 PetriNetUnfolderBase]: 1968/2994 cut-off events. [2024-06-21 20:37:50,208 INFO L125 PetriNetUnfolderBase]: For 67460/67465 co-relation queries the response was YES. [2024-06-21 20:37:50,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17085 conditions, 2994 events. 1968/2994 cut-off events. For 67460/67465 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14798 event pairs, 671 based on Foata normal form. 8/3000 useless extension candidates. Maximal degree in co-relation 17045. Up to 2729 conditions per place. [2024-06-21 20:37:50,223 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 41 changer transitions 0/137 dead transitions. [2024-06-21 20:37:50,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 137 transitions, 1364 flow [2024-06-21 20:37:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:37:50,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:37:50,224 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 906 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:37:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 137 transitions, 1364 flow [2024-06-21 20:37:50,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 137 transitions, 1256 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:50,248 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 934 flow [2024-06-21 20:37:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-21 20:37:50,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 20:37:50,249 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 934 flow [2024-06-21 20:37:50,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:50,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:50,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:37:50,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:50,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283279, now seen corresponding path program 4 times [2024-06-21 20:37:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:50,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534018614] [2024-06-21 20:37:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:51,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:51,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534018614] [2024-06-21 20:37:51,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534018614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:51,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:51,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:51,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030102055] [2024-06-21 20:37:51,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:51,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:51,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:51,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:51,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:51,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:51,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:51,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:51,824 INFO L124 PetriNetUnfolderBase]: 1958/2980 cut-off events. [2024-06-21 20:37:51,824 INFO L125 PetriNetUnfolderBase]: For 71502/71507 co-relation queries the response was YES. [2024-06-21 20:37:51,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 2980 events. 1958/2980 cut-off events. For 71502/71507 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14781 event pairs, 669 based on Foata normal form. 8/2986 useless extension candidates. Maximal degree in co-relation 17102. Up to 2721 conditions per place. [2024-06-21 20:37:51,841 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-21 20:37:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1260 flow [2024-06-21 20:37:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:37:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:37:51,842 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 934 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:37:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1260 flow [2024-06-21 20:37:51,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1142 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:51,881 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 902 flow [2024-06-21 20:37:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=902, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-21 20:37:51,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 20:37:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 902 flow [2024-06-21 20:37:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:51,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:51,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:37:51,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1418640726, now seen corresponding path program 5 times [2024-06-21 20:37:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862253981] [2024-06-21 20:37:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862253981] [2024-06-21 20:37:52,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862253981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:52,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:52,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:52,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866236744] [2024-06-21 20:37:52,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:52,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:52,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:52,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:52,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:52,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:52,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:53,441 INFO L124 PetriNetUnfolderBase]: 1953/2970 cut-off events. [2024-06-21 20:37:53,442 INFO L125 PetriNetUnfolderBase]: For 75673/75673 co-relation queries the response was YES. [2024-06-21 20:37:53,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17209 conditions, 2970 events. 1953/2970 cut-off events. For 75673/75673 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14681 event pairs, 717 based on Foata normal form. 2/2968 useless extension candidates. Maximal degree in co-relation 17167. Up to 2711 conditions per place. [2024-06-21 20:37:53,457 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-21 20:37:53,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1314 flow [2024-06-21 20:37:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:37:53,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:37:53,458 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 902 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:37:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1314 flow [2024-06-21 20:37:53,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 135 transitions, 1184 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:53,492 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 880 flow [2024-06-21 20:37:53,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=880, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-21 20:37:53,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 20:37:53,492 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 880 flow [2024-06-21 20:37:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:53,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:53,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:53,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:37:53,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283496, now seen corresponding path program 6 times [2024-06-21 20:37:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284515223] [2024-06-21 20:37:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:53,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:54,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284515223] [2024-06-21 20:37:54,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284515223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:54,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:54,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:54,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924514392] [2024-06-21 20:37:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:54,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:37:54,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 880 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:54,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:54,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:37:54,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:55,016 INFO L124 PetriNetUnfolderBase]: 1948/2968 cut-off events. [2024-06-21 20:37:55,016 INFO L125 PetriNetUnfolderBase]: For 80663/80663 co-relation queries the response was YES. [2024-06-21 20:37:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 2968 events. 1948/2968 cut-off events. For 80663/80663 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14695 event pairs, 717 based on Foata normal form. 2/2966 useless extension candidates. Maximal degree in co-relation 17272. Up to 2706 conditions per place. [2024-06-21 20:37:55,038 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 52 changer transitions 0/133 dead transitions. [2024-06-21 20:37:55,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1194 flow [2024-06-21 20:37:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:37:55,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:37:55,039 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 880 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:37:55,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1194 flow [2024-06-21 20:37:55,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1062 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:55,082 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 860 flow [2024-06-21 20:37:55,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-21 20:37:55,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 20:37:55,083 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 860 flow [2024-06-21 20:37:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:55,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:55,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:55,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:37:55,083 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:55,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -257489989, now seen corresponding path program 1 times [2024-06-21 20:37:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:55,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350973845] [2024-06-21 20:37:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:56,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350973845] [2024-06-21 20:37:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350973845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:56,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:56,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976731852] [2024-06-21 20:37:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:56,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:56,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:56,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 860 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:56,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:56,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:56,508 INFO L124 PetriNetUnfolderBase]: 1465/2467 cut-off events. [2024-06-21 20:37:56,509 INFO L125 PetriNetUnfolderBase]: For 71923/71923 co-relation queries the response was YES. [2024-06-21 20:37:56,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14282 conditions, 2467 events. 1465/2467 cut-off events. For 71923/71923 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13660 event pairs, 564 based on Foata normal form. 2/2468 useless extension candidates. Maximal degree in co-relation 14238. Up to 2122 conditions per place. [2024-06-21 20:37:56,526 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 84 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-21 20:37:56,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 123 transitions, 1098 flow [2024-06-21 20:37:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 20:37:56,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:37:56,527 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 860 flow. Second operand 6 states and 123 transitions. [2024-06-21 20:37:56,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 123 transitions, 1098 flow [2024-06-21 20:37:56,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 123 transitions, 970 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:56,556 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 790 flow [2024-06-21 20:37:56,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-21 20:37:56,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 20:37:56,556 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 790 flow [2024-06-21 20:37:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:37:56,557 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:56,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1378799503, now seen corresponding path program 1 times [2024-06-21 20:37:56,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:56,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593704816] [2024-06-21 20:37:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:57,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:57,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593704816] [2024-06-21 20:37:57,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593704816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:57,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:57,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:57,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279712319] [2024-06-21 20:37:57,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:57,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:57,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 790 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:57,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:57,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:57,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:58,186 INFO L124 PetriNetUnfolderBase]: 1882/2920 cut-off events. [2024-06-21 20:37:58,186 INFO L125 PetriNetUnfolderBase]: For 92318/92318 co-relation queries the response was YES. [2024-06-21 20:37:58,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17670 conditions, 2920 events. 1882/2920 cut-off events. For 92318/92318 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14917 event pairs, 464 based on Foata normal form. 4/2923 useless extension candidates. Maximal degree in co-relation 17625. Up to 2631 conditions per place. [2024-06-21 20:37:58,204 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 118 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-21 20:37:58,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1334 flow [2024-06-21 20:37:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:37:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 20:37:58,205 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 790 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:37:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1334 flow [2024-06-21 20:37:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1298 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:58,256 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 881 flow [2024-06-21 20:37:58,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-06-21 20:37:58,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 20:37:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 881 flow [2024-06-21 20:37:58,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:58,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:58,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:37:58,257 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:58,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 247855977, now seen corresponding path program 2 times [2024-06-21 20:37:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267639676] [2024-06-21 20:37:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:59,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267639676] [2024-06-21 20:37:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267639676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:59,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:59,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:59,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512485896] [2024-06-21 20:37:59,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:59,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:59,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:37:59,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:59,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:59,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:37:59,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:59,881 INFO L124 PetriNetUnfolderBase]: 1874/2908 cut-off events. [2024-06-21 20:37:59,881 INFO L125 PetriNetUnfolderBase]: For 98335/98335 co-relation queries the response was YES. [2024-06-21 20:37:59,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17941 conditions, 2908 events. 1874/2908 cut-off events. For 98335/98335 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14813 event pairs, 623 based on Foata normal form. 4/2911 useless extension candidates. Maximal degree in co-relation 17895. Up to 2678 conditions per place. [2024-06-21 20:37:59,902 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 16 changer transitions 0/147 dead transitions. [2024-06-21 20:37:59,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1219 flow [2024-06-21 20:37:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:37:59,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:37:59,904 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 881 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:37:59,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1219 flow [2024-06-21 20:37:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:59,956 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 836 flow [2024-06-21 20:37:59,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-06-21 20:37:59,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 20:37:59,957 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 836 flow [2024-06-21 20:37:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:59,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:59,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:59,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:37:59,957 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:59,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash 137038417, now seen corresponding path program 1 times [2024-06-21 20:37:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:59,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877477769] [2024-06-21 20:37:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:00,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877477769] [2024-06-21 20:38:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877477769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:00,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:00,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:00,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134433543] [2024-06-21 20:38:00,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:00,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:00,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:00,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:00,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 836 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:00,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:00,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:00,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:01,579 INFO L124 PetriNetUnfolderBase]: 1995/3051 cut-off events. [2024-06-21 20:38:01,579 INFO L125 PetriNetUnfolderBase]: For 106469/106469 co-relation queries the response was YES. [2024-06-21 20:38:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 3051 events. 1995/3051 cut-off events. For 106469/106469 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15268 event pairs, 651 based on Foata normal form. 4/3054 useless extension candidates. Maximal degree in co-relation 18785. Up to 2888 conditions per place. [2024-06-21 20:38:01,600 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-21 20:38:01,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 154 transitions, 1268 flow [2024-06-21 20:38:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:38:01,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:38:01,601 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 836 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:38:01,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 154 transitions, 1268 flow [2024-06-21 20:38:01,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1231 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:01,645 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 901 flow [2024-06-21 20:38:01,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=901, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-21 20:38:01,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 20:38:01,647 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 901 flow [2024-06-21 20:38:01,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:01,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:01,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:38:01,647 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:01,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -146262115, now seen corresponding path program 3 times [2024-06-21 20:38:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:01,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283665490] [2024-06-21 20:38:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283665490] [2024-06-21 20:38:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283665490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744511639] [2024-06-21 20:38:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:02,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:02,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:02,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:03,236 INFO L124 PetriNetUnfolderBase]: 1913/2978 cut-off events. [2024-06-21 20:38:03,237 INFO L125 PetriNetUnfolderBase]: For 114023/114026 co-relation queries the response was YES. [2024-06-21 20:38:03,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 2978 events. 1913/2978 cut-off events. For 114023/114026 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15301 event pairs, 622 based on Foata normal form. 6/2982 useless extension candidates. Maximal degree in co-relation 18983. Up to 2692 conditions per place. [2024-06-21 20:38:03,255 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-06-21 20:38:03,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1279 flow [2024-06-21 20:38:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:38:03,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:38:03,256 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 901 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:38:03,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1279 flow [2024-06-21 20:38:03,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 149 transitions, 1201 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:03,309 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 934 flow [2024-06-21 20:38:03,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-21 20:38:03,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 20:38:03,310 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 934 flow [2024-06-21 20:38:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:03,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:03,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:38:03,310 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:03,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:03,310 INFO L85 PathProgramCache]: Analyzing trace with hash 252509077, now seen corresponding path program 2 times [2024-06-21 20:38:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:03,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990625622] [2024-06-21 20:38:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:04,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:04,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990625622] [2024-06-21 20:38:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990625622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:04,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:04,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:04,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240633878] [2024-06-21 20:38:04,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:04,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:04,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 934 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:04,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:04,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:04,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:05,082 INFO L124 PetriNetUnfolderBase]: 2066/3165 cut-off events. [2024-06-21 20:38:05,082 INFO L125 PetriNetUnfolderBase]: For 126089/126092 co-relation queries the response was YES. [2024-06-21 20:38:05,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20565 conditions, 3165 events. 2066/3165 cut-off events. For 126089/126092 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15987 event pairs, 595 based on Foata normal form. 4/3166 useless extension candidates. Maximal degree in co-relation 20515. Up to 2656 conditions per place. [2024-06-21 20:38:05,099 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 67 changer transitions 0/169 dead transitions. [2024-06-21 20:38:05,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 169 transitions, 1754 flow [2024-06-21 20:38:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 20:38:05,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:38:05,100 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 934 flow. Second operand 9 states and 186 transitions. [2024-06-21 20:38:05,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 169 transitions, 1754 flow [2024-06-21 20:38:05,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1661 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:05,143 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 1157 flow [2024-06-21 20:38:05,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1157, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2024-06-21 20:38:05,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-21 20:38:05,143 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 1157 flow [2024-06-21 20:38:05,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:05,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:05,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:05,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:38:05,144 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:05,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -146084175, now seen corresponding path program 3 times [2024-06-21 20:38:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530514520] [2024-06-21 20:38:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:06,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530514520] [2024-06-21 20:38:06,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530514520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:06,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252355809] [2024-06-21 20:38:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:06,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:06,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:06,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:06,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 1157 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:06,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:06,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:06,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:06,941 INFO L124 PetriNetUnfolderBase]: 2088/3202 cut-off events. [2024-06-21 20:38:06,941 INFO L125 PetriNetUnfolderBase]: For 136091/136094 co-relation queries the response was YES. [2024-06-21 20:38:06,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21457 conditions, 3202 events. 2088/3202 cut-off events. For 136091/136094 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16214 event pairs, 595 based on Foata normal form. 4/3203 useless extension candidates. Maximal degree in co-relation 21406. Up to 2675 conditions per place. [2024-06-21 20:38:06,962 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 68 changer transitions 0/173 dead transitions. [2024-06-21 20:38:06,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1889 flow [2024-06-21 20:38:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:38:06,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:38:06,963 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 1157 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:38:06,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1889 flow [2024-06-21 20:38:07,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1775 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:07,021 INFO L231 Difference]: Finished difference. Result has 121 places, 134 transitions, 1249 flow [2024-06-21 20:38:07,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=121, PETRI_TRANSITIONS=134} [2024-06-21 20:38:07,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-21 20:38:07,022 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 134 transitions, 1249 flow [2024-06-21 20:38:07,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:07,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:07,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:38:07,023 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:07,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -146257155, now seen corresponding path program 4 times [2024-06-21 20:38:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:07,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36718981] [2024-06-21 20:38:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:07,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36718981] [2024-06-21 20:38:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36718981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:07,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:07,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667193898] [2024-06-21 20:38:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:07,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:07,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:07,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 134 transitions, 1249 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:07,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:07,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:07,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:08,783 INFO L124 PetriNetUnfolderBase]: 2078/3193 cut-off events. [2024-06-21 20:38:08,783 INFO L125 PetriNetUnfolderBase]: For 141048/141051 co-relation queries the response was YES. [2024-06-21 20:38:08,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21579 conditions, 3193 events. 2078/3193 cut-off events. For 141048/141051 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16250 event pairs, 598 based on Foata normal form. 4/3194 useless extension candidates. Maximal degree in co-relation 21526. Up to 2667 conditions per place. [2024-06-21 20:38:08,805 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 99 selfloop transitions, 67 changer transitions 0/171 dead transitions. [2024-06-21 20:38:08,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1795 flow [2024-06-21 20:38:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 20:38:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 20:38:08,806 INFO L175 Difference]: Start difference. First operand has 121 places, 134 transitions, 1249 flow. Second operand 9 states and 187 transitions. [2024-06-21 20:38:08,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1795 flow [2024-06-21 20:38:08,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 171 transitions, 1648 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:08,869 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1244 flow [2024-06-21 20:38:08,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1244, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-21 20:38:08,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 20:38:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1244 flow [2024-06-21 20:38:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:38:08,870 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:08,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:08,870 INFO L85 PathProgramCache]: Analyzing trace with hash 594398166, now seen corresponding path program 1 times [2024-06-21 20:38:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766447388] [2024-06-21 20:38:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766447388] [2024-06-21 20:38:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766447388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280685257] [2024-06-21 20:38:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:09,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:09,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:09,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:09,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:10,150 INFO L124 PetriNetUnfolderBase]: 1796/2900 cut-off events. [2024-06-21 20:38:10,150 INFO L125 PetriNetUnfolderBase]: For 145808/145816 co-relation queries the response was YES. [2024-06-21 20:38:10,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20261 conditions, 2900 events. 1796/2900 cut-off events. For 145808/145816 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15747 event pairs, 599 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 20207. Up to 2608 conditions per place. [2024-06-21 20:38:10,168 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 112 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-21 20:38:10,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 152 transitions, 1564 flow [2024-06-21 20:38:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 20:38:10,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:38:10,169 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1244 flow. Second operand 6 states and 123 transitions. [2024-06-21 20:38:10,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 152 transitions, 1564 flow [2024-06-21 20:38:10,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1390 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:10,226 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1141 flow [2024-06-21 20:38:10,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1141, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2024-06-21 20:38:10,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-21 20:38:10,227 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1141 flow [2024-06-21 20:38:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:10,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:10,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:38:10,227 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash -109661163, now seen corresponding path program 4 times [2024-06-21 20:38:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:10,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915227567] [2024-06-21 20:38:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:11,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915227567] [2024-06-21 20:38:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915227567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:11,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685738547] [2024-06-21 20:38:11,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:11,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:11,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1141 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:11,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:11,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:11,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:11,807 INFO L124 PetriNetUnfolderBase]: 1969/3079 cut-off events. [2024-06-21 20:38:11,807 INFO L125 PetriNetUnfolderBase]: For 152410/152410 co-relation queries the response was YES. [2024-06-21 20:38:11,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21218 conditions, 3079 events. 1969/3079 cut-off events. For 152410/152410 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16017 event pairs, 617 based on Foata normal form. 4/3079 useless extension candidates. Maximal degree in co-relation 21163. Up to 2778 conditions per place. [2024-06-21 20:38:11,826 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 28 changer transitions 0/163 dead transitions. [2024-06-21 20:38:11,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 163 transitions, 1545 flow [2024-06-21 20:38:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:38:11,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:38:11,827 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1141 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:38:11,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 163 transitions, 1545 flow [2024-06-21 20:38:11,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1498 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:11,896 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1211 flow [2024-06-21 20:38:11,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1211, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2024-06-21 20:38:11,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 20:38:11,896 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1211 flow [2024-06-21 20:38:11,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:11,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:11,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:11,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:38:11,897 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:11,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -109483223, now seen corresponding path program 5 times [2024-06-21 20:38:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:11,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350593522] [2024-06-21 20:38:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:12,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350593522] [2024-06-21 20:38:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350593522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:12,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:12,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:12,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538449396] [2024-06-21 20:38:12,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:12,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:12,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:12,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:12,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:12,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 1211 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:12,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:12,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:12,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:13,652 INFO L124 PetriNetUnfolderBase]: 2166/3338 cut-off events. [2024-06-21 20:38:13,652 INFO L125 PetriNetUnfolderBase]: For 170077/170077 co-relation queries the response was YES. [2024-06-21 20:38:13,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 3338 events. 2166/3338 cut-off events. For 170077/170077 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17114 event pairs, 600 based on Foata normal form. 4/3338 useless extension candidates. Maximal degree in co-relation 23346. Up to 2742 conditions per place. [2024-06-21 20:38:13,675 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 105 selfloop transitions, 76 changer transitions 0/186 dead transitions. [2024-06-21 20:38:13,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 186 transitions, 2260 flow [2024-06-21 20:38:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:38:13,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:38:13,676 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1211 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:38:13,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 186 transitions, 2260 flow [2024-06-21 20:38:13,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 2161 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:13,740 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1467 flow [2024-06-21 20:38:13,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-21 20:38:13,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-21 20:38:13,741 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1467 flow [2024-06-21 20:38:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:13,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:13,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:13,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:38:13,742 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:13,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash -800107239, now seen corresponding path program 6 times [2024-06-21 20:38:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:13,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417420625] [2024-06-21 20:38:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:14,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:14,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417420625] [2024-06-21 20:38:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417420625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206239024] [2024-06-21 20:38:14,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:14,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:14,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1467 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:14,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:14,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:14,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:15,577 INFO L124 PetriNetUnfolderBase]: 2220/3431 cut-off events. [2024-06-21 20:38:15,578 INFO L125 PetriNetUnfolderBase]: For 184060/184060 co-relation queries the response was YES. [2024-06-21 20:38:15,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24565 conditions, 3431 events. 2220/3431 cut-off events. For 184060/184060 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17744 event pairs, 602 based on Foata normal form. 4/3431 useless extension candidates. Maximal degree in co-relation 24508. Up to 2788 conditions per place. [2024-06-21 20:38:15,601 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 85 changer transitions 0/191 dead transitions. [2024-06-21 20:38:15,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 191 transitions, 2483 flow [2024-06-21 20:38:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:38:15,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 20:38:15,603 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1467 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:38:15,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 191 transitions, 2483 flow [2024-06-21 20:38:15,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 2201 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:15,690 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1505 flow [2024-06-21 20:38:15,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1505, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-21 20:38:15,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-21 20:38:15,690 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1505 flow [2024-06-21 20:38:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:15,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:15,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:15,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:38:15,691 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:15,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:15,691 INFO L85 PathProgramCache]: Analyzing trace with hash -800113749, now seen corresponding path program 7 times [2024-06-21 20:38:15,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:15,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059261024] [2024-06-21 20:38:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:15,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:16,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059261024] [2024-06-21 20:38:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059261024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:16,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:16,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323368085] [2024-06-21 20:38:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:16,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:16,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1505 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:16,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:16,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:16,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:17,496 INFO L124 PetriNetUnfolderBase]: 2210/3417 cut-off events. [2024-06-21 20:38:17,497 INFO L125 PetriNetUnfolderBase]: For 186955/186955 co-relation queries the response was YES. [2024-06-21 20:38:17,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24364 conditions, 3417 events. 2210/3417 cut-off events. For 186955/186955 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17700 event pairs, 600 based on Foata normal form. 4/3417 useless extension candidates. Maximal degree in co-relation 24306. Up to 2780 conditions per place. [2024-06-21 20:38:17,520 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 98 selfloop transitions, 86 changer transitions 0/189 dead transitions. [2024-06-21 20:38:17,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 2241 flow [2024-06-21 20:38:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:38:17,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 20:38:17,522 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1505 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:38:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 2241 flow [2024-06-21 20:38:17,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1973 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:17,608 INFO L231 Difference]: Finished difference. Result has 135 places, 154 transitions, 1417 flow [2024-06-21 20:38:17,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=135, PETRI_TRANSITIONS=154} [2024-06-21 20:38:17,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 20:38:17,608 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 1417 flow [2024-06-21 20:38:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:38:17,609 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:17,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash -109476713, now seen corresponding path program 8 times [2024-06-21 20:38:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362042069] [2024-06-21 20:38:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:18,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:18,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362042069] [2024-06-21 20:38:18,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362042069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:18,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237590836] [2024-06-21 20:38:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:18,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 154 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:19,447 INFO L124 PetriNetUnfolderBase]: 2200/3403 cut-off events. [2024-06-21 20:38:19,447 INFO L125 PetriNetUnfolderBase]: For 191501/191501 co-relation queries the response was YES. [2024-06-21 20:38:19,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24136 conditions, 3403 events. 2200/3403 cut-off events. For 191501/191501 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17627 event pairs, 598 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 24077. Up to 2772 conditions per place. [2024-06-21 20:38:19,468 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-21 20:38:19,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 2161 flow [2024-06-21 20:38:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:38:19,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 20:38:19,469 INFO L175 Difference]: Start difference. First operand has 135 places, 154 transitions, 1417 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:38:19,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 2161 flow [2024-06-21 20:38:19,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1955 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:19,534 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1385 flow [2024-06-21 20:38:19,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1385, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-21 20:38:19,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-21 20:38:19,535 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1385 flow [2024-06-21 20:38:19,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:19,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:19,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:19,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:38:19,535 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:19,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -791833029, now seen corresponding path program 9 times [2024-06-21 20:38:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:19,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643138924] [2024-06-21 20:38:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:19,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:20,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643138924] [2024-06-21 20:38:20,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643138924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:20,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:20,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272525364] [2024-06-21 20:38:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:20,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:20,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:20,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:20,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:21,289 INFO L124 PetriNetUnfolderBase]: 2190/3389 cut-off events. [2024-06-21 20:38:21,289 INFO L125 PetriNetUnfolderBase]: For 197541/197541 co-relation queries the response was YES. [2024-06-21 20:38:21,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24044 conditions, 3389 events. 2190/3389 cut-off events. For 197541/197541 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17523 event pairs, 603 based on Foata normal form. 4/3389 useless extension candidates. Maximal degree in co-relation 23984. Up to 2764 conditions per place. [2024-06-21 20:38:21,313 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 89 selfloop transitions, 92 changer transitions 0/186 dead transitions. [2024-06-21 20:38:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 186 transitions, 1975 flow [2024-06-21 20:38:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:38:21,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:38:21,314 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1385 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:38:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 186 transitions, 1975 flow [2024-06-21 20:38:21,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 1775 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:21,393 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1377 flow [2024-06-21 20:38:21,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-21 20:38:21,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 20:38:21,394 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1377 flow [2024-06-21 20:38:21,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:21,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:21,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:38:21,394 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:21,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1028187879, now seen corresponding path program 10 times [2024-06-21 20:38:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712232650] [2024-06-21 20:38:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:21,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:22,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712232650] [2024-06-21 20:38:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712232650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:22,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:22,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194132158] [2024-06-21 20:38:22,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:22,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:22,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:22,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:22,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1377 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:22,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:22,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:22,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:23,182 INFO L124 PetriNetUnfolderBase]: 2180/3375 cut-off events. [2024-06-21 20:38:23,182 INFO L125 PetriNetUnfolderBase]: For 203365/203365 co-relation queries the response was YES. [2024-06-21 20:38:23,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23989 conditions, 3375 events. 2180/3375 cut-off events. For 203365/203365 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17503 event pairs, 591 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 23928. Up to 2756 conditions per place. [2024-06-21 20:38:23,207 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 95 selfloop transitions, 85 changer transitions 0/185 dead transitions. [2024-06-21 20:38:23,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 185 transitions, 1813 flow [2024-06-21 20:38:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:38:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 20:38:23,209 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1377 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:38:23,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 185 transitions, 1813 flow [2024-06-21 20:38:23,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 1573 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:23,295 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1315 flow [2024-06-21 20:38:23,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1315, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-21 20:38:23,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 20:38:23,295 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1315 flow [2024-06-21 20:38:23,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:23,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:23,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:23,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:38:23,296 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:23,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash 607730646, now seen corresponding path program 2 times [2024-06-21 20:38:23,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:23,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903404488] [2024-06-21 20:38:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:24,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903404488] [2024-06-21 20:38:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903404488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199115665] [2024-06-21 20:38:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:24,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:24,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1315 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:24,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:24,592 INFO L124 PetriNetUnfolderBase]: 1853/3001 cut-off events. [2024-06-21 20:38:24,592 INFO L125 PetriNetUnfolderBase]: For 206364/206364 co-relation queries the response was YES. [2024-06-21 20:38:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22321 conditions, 3001 events. 1853/3001 cut-off events. For 206364/206364 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16478 event pairs, 602 based on Foata normal form. 1/2976 useless extension candidates. Maximal degree in co-relation 22259. Up to 2685 conditions per place. [2024-06-21 20:38:24,614 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 121 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-06-21 20:38:24,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 166 transitions, 1653 flow [2024-06-21 20:38:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:38:24,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:38:24,615 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1315 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:38:24,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 166 transitions, 1653 flow [2024-06-21 20:38:24,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1459 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:24,708 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1207 flow [2024-06-21 20:38:24,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1207, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-21 20:38:24,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 20:38:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1207 flow [2024-06-21 20:38:24,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:24,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:24,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:38:24,712 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:24,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 600118038, now seen corresponding path program 1 times [2024-06-21 20:38:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373788464] [2024-06-21 20:38:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:25,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:25,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373788464] [2024-06-21 20:38:25,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373788464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:25,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:25,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610051369] [2024-06-21 20:38:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:25,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1207 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:25,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:25,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:25,843 INFO L124 PetriNetUnfolderBase]: 1831/3010 cut-off events. [2024-06-21 20:38:25,843 INFO L125 PetriNetUnfolderBase]: For 182967/182967 co-relation queries the response was YES. [2024-06-21 20:38:25,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20913 conditions, 3010 events. 1831/3010 cut-off events. For 182967/182967 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16594 event pairs, 523 based on Foata normal form. 1/3010 useless extension candidates. Maximal degree in co-relation 20850. Up to 2675 conditions per place. [2024-06-21 20:38:25,864 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-21 20:38:25,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1585 flow [2024-06-21 20:38:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:38:25,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:25,865 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1207 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:38:25,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1585 flow [2024-06-21 20:38:25,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1521 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:25,964 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1215 flow [2024-06-21 20:38:25,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1215, PETRI_PLACES=138, PETRI_TRANSITIONS=160} [2024-06-21 20:38:25,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 20:38:25,964 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1215 flow [2024-06-21 20:38:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:25,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:25,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:38:25,965 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:25,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -791525199, now seen corresponding path program 1 times [2024-06-21 20:38:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957531994] [2024-06-21 20:38:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:26,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957531994] [2024-06-21 20:38:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957531994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:26,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:26,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753780963] [2024-06-21 20:38:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:26,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:26,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:27,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 160 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:27,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:27,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:27,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:27,834 INFO L124 PetriNetUnfolderBase]: 1930/3103 cut-off events. [2024-06-21 20:38:27,835 INFO L125 PetriNetUnfolderBase]: For 190099/190099 co-relation queries the response was YES. [2024-06-21 20:38:27,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21606 conditions, 3103 events. 1930/3103 cut-off events. For 190099/190099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16587 event pairs, 513 based on Foata normal form. 4/3106 useless extension candidates. Maximal degree in co-relation 21542. Up to 2813 conditions per place. [2024-06-21 20:38:27,858 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 19 changer transitions 0/193 dead transitions. [2024-06-21 20:38:27,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 193 transitions, 1727 flow [2024-06-21 20:38:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:38:27,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:38:27,859 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1215 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:38:27,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 193 transitions, 1727 flow [2024-06-21 20:38:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 1677 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:28,009 INFO L231 Difference]: Finished difference. Result has 144 places, 165 transitions, 1288 flow [2024-06-21 20:38:28,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1288, PETRI_PLACES=144, PETRI_TRANSITIONS=165} [2024-06-21 20:38:28,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 20:38:28,010 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 165 transitions, 1288 flow [2024-06-21 20:38:28,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:28,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:38:28,010 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:28,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash 607736598, now seen corresponding path program 2 times [2024-06-21 20:38:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685983433] [2024-06-21 20:38:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685983433] [2024-06-21 20:38:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685983433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:28,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:28,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:28,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763307230] [2024-06-21 20:38:28,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:28,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:28,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:28,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 165 transitions, 1288 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:28,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:29,262 INFO L124 PetriNetUnfolderBase]: 1820/2988 cut-off events. [2024-06-21 20:38:29,262 INFO L125 PetriNetUnfolderBase]: For 195074/195077 co-relation queries the response was YES. [2024-06-21 20:38:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21528 conditions, 2988 events. 1820/2988 cut-off events. For 195074/195077 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16334 event pairs, 498 based on Foata normal form. 3/2989 useless extension candidates. Maximal degree in co-relation 21462. Up to 2653 conditions per place. [2024-06-21 20:38:29,288 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2024-06-21 20:38:29,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 177 transitions, 1676 flow [2024-06-21 20:38:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:38:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:38:29,290 INFO L175 Difference]: Start difference. First operand has 144 places, 165 transitions, 1288 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:38:29,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 177 transitions, 1676 flow [2024-06-21 20:38:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 177 transitions, 1593 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:29,401 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1295 flow [2024-06-21 20:38:29,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1295, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-21 20:38:29,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 20:38:29,401 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1295 flow [2024-06-21 20:38:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:29,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:29,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:29,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:38:29,402 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:29,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash 393218633, now seen corresponding path program 1 times [2024-06-21 20:38:29,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:29,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137062709] [2024-06-21 20:38:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:30,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:30,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137062709] [2024-06-21 20:38:30,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137062709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:30,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:30,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:30,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503327907] [2024-06-21 20:38:30,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:30,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:30,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1295 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:30,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:30,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:31,185 INFO L124 PetriNetUnfolderBase]: 2210/3421 cut-off events. [2024-06-21 20:38:31,186 INFO L125 PetriNetUnfolderBase]: For 248258/248258 co-relation queries the response was YES. [2024-06-21 20:38:31,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25847 conditions, 3421 events. 2210/3421 cut-off events. For 248258/248258 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17641 event pairs, 418 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 25780. Up to 3098 conditions per place. [2024-06-21 20:38:31,212 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-21 20:38:31,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 214 transitions, 2085 flow [2024-06-21 20:38:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 20:38:31,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 20:38:31,213 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1295 flow. Second operand 10 states and 193 transitions. [2024-06-21 20:38:31,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 214 transitions, 2085 flow [2024-06-21 20:38:31,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2017 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:31,330 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1388 flow [2024-06-21 20:38:31,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1388, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-21 20:38:31,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 20:38:31,330 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1388 flow [2024-06-21 20:38:31,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:31,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:31,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:38:31,331 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:31,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -377684783, now seen corresponding path program 2 times [2024-06-21 20:38:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:31,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310395071] [2024-06-21 20:38:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310395071] [2024-06-21 20:38:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310395071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126119351] [2024-06-21 20:38:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:32,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:32,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1388 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:32,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:32,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:32,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:33,054 INFO L124 PetriNetUnfolderBase]: 2227/3448 cut-off events. [2024-06-21 20:38:33,054 INFO L125 PetriNetUnfolderBase]: For 260438/260438 co-relation queries the response was YES. [2024-06-21 20:38:33,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3448 events. 2227/3448 cut-off events. For 260438/260438 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17839 event pairs, 577 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 26415. Up to 3188 conditions per place. [2024-06-21 20:38:33,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 22 changer transitions 0/211 dead transitions. [2024-06-21 20:38:33,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2118 flow [2024-06-21 20:38:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:38:33,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:38:33,082 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1388 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:38:33,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2118 flow [2024-06-21 20:38:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2017 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:33,254 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 1392 flow [2024-06-21 20:38:33,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-06-21 20:38:33,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 20:38:33,254 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 1392 flow [2024-06-21 20:38:33,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:33,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:33,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:38:33,255 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 395096303, now seen corresponding path program 3 times [2024-06-21 20:38:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958497853] [2024-06-21 20:38:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958497853] [2024-06-21 20:38:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958497853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:34,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189857868] [2024-06-21 20:38:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:34,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:34,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 1392 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:34,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:34,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:34,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:35,014 INFO L124 PetriNetUnfolderBase]: 2219/3436 cut-off events. [2024-06-21 20:38:35,014 INFO L125 PetriNetUnfolderBase]: For 267380/267380 co-relation queries the response was YES. [2024-06-21 20:38:35,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 3436 events. 2219/3436 cut-off events. For 267380/267380 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17732 event pairs, 580 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 26275. Up to 3223 conditions per place. [2024-06-21 20:38:35,043 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-21 20:38:35,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 208 transitions, 1884 flow [2024-06-21 20:38:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:38:35,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:38:35,044 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 1392 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:38:35,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 208 transitions, 1884 flow [2024-06-21 20:38:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 208 transitions, 1781 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:35,205 INFO L231 Difference]: Finished difference. Result has 155 places, 174 transitions, 1334 flow [2024-06-21 20:38:35,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=155, PETRI_TRANSITIONS=174} [2024-06-21 20:38:35,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-21 20:38:35,206 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 174 transitions, 1334 flow [2024-06-21 20:38:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:35,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:35,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:35,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:38:35,206 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:35,206 INFO L85 PathProgramCache]: Analyzing trace with hash -233646383, now seen corresponding path program 4 times [2024-06-21 20:38:35,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:35,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402082986] [2024-06-21 20:38:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:36,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402082986] [2024-06-21 20:38:36,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402082986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:36,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:36,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:36,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004878015] [2024-06-21 20:38:36,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:36,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:36,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:36,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 174 transitions, 1334 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:36,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:36,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:36,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:37,186 INFO L124 PetriNetUnfolderBase]: 2236/3465 cut-off events. [2024-06-21 20:38:37,186 INFO L125 PetriNetUnfolderBase]: For 278268/278271 co-relation queries the response was YES. [2024-06-21 20:38:37,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26620 conditions, 3465 events. 2236/3465 cut-off events. For 278268/278271 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17912 event pairs, 588 based on Foata normal form. 6/3468 useless extension candidates. Maximal degree in co-relation 26549. Up to 3124 conditions per place. [2024-06-21 20:38:37,210 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 52 changer transitions 0/207 dead transitions. [2024-06-21 20:38:37,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 1870 flow [2024-06-21 20:38:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:38:37,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:38:37,212 INFO L175 Difference]: Start difference. First operand has 155 places, 174 transitions, 1334 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:38:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 1870 flow [2024-06-21 20:38:37,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 207 transitions, 1827 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:37,346 INFO L231 Difference]: Finished difference. Result has 156 places, 176 transitions, 1460 flow [2024-06-21 20:38:37,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=156, PETRI_TRANSITIONS=176} [2024-06-21 20:38:37,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 20:38:37,347 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 176 transitions, 1460 flow [2024-06-21 20:38:37,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:37,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:37,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:38:37,347 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:37,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash -239008763, now seen corresponding path program 5 times [2024-06-21 20:38:37,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:37,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771392935] [2024-06-21 20:38:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:38,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:38,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771392935] [2024-06-21 20:38:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771392935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:38,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389195528] [2024-06-21 20:38:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:38,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:38,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:38,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 176 transitions, 1460 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:38,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:38,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:38,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:39,136 INFO L124 PetriNetUnfolderBase]: 2253/3492 cut-off events. [2024-06-21 20:38:39,136 INFO L125 PetriNetUnfolderBase]: For 290988/290991 co-relation queries the response was YES. [2024-06-21 20:38:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3492 events. 2253/3492 cut-off events. For 290988/290991 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18163 event pairs, 593 based on Foata normal form. 6/3495 useless extension candidates. Maximal degree in co-relation 27253. Up to 3151 conditions per place. [2024-06-21 20:38:39,163 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-21 20:38:39,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 209 transitions, 2004 flow [2024-06-21 20:38:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:38:39,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:38:39,165 INFO L175 Difference]: Start difference. First operand has 156 places, 176 transitions, 1460 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:38:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 209 transitions, 2004 flow [2024-06-21 20:38:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 1853 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:39,332 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1480 flow [2024-06-21 20:38:39,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1480, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-21 20:38:39,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 20:38:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1480 flow [2024-06-21 20:38:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:39,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:39,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:39,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:38:39,332 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:39,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:39,333 INFO L85 PathProgramCache]: Analyzing trace with hash -239156633, now seen corresponding path program 6 times [2024-06-21 20:38:39,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:39,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656998307] [2024-06-21 20:38:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:39,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656998307] [2024-06-21 20:38:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656998307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:40,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:40,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61153496] [2024-06-21 20:38:40,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:40,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1480 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:41,049 INFO L124 PetriNetUnfolderBase]: 2270/3519 cut-off events. [2024-06-21 20:38:41,049 INFO L125 PetriNetUnfolderBase]: For 303247/303250 co-relation queries the response was YES. [2024-06-21 20:38:41,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27803 conditions, 3519 events. 2270/3519 cut-off events. For 303247/303250 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18322 event pairs, 588 based on Foata normal form. 6/3522 useless extension candidates. Maximal degree in co-relation 27730. Up to 3119 conditions per place. [2024-06-21 20:38:41,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 56 changer transitions 0/212 dead transitions. [2024-06-21 20:38:41,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2036 flow [2024-06-21 20:38:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:38:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:38:41,083 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1480 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:38:41,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2036 flow [2024-06-21 20:38:41,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 1883 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:41,289 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1512 flow [2024-06-21 20:38:41,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1512, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-21 20:38:41,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 20:38:41,289 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1512 flow [2024-06-21 20:38:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:41,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:41,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:38:41,290 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:41,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash 781151836, now seen corresponding path program 1 times [2024-06-21 20:38:41,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:41,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171426068] [2024-06-21 20:38:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:41,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171426068] [2024-06-21 20:38:42,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171426068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:42,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:42,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226711567] [2024-06-21 20:38:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:42,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:42,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:42,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1512 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:42,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:42,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:42,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:42,831 INFO L124 PetriNetUnfolderBase]: 1938/3160 cut-off events. [2024-06-21 20:38:42,831 INFO L125 PetriNetUnfolderBase]: For 309840/309854 co-relation queries the response was YES. [2024-06-21 20:38:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26126 conditions, 3160 events. 1938/3160 cut-off events. For 309840/309854 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17541 event pairs, 563 based on Foata normal form. 4/3143 useless extension candidates. Maximal degree in co-relation 26052. Up to 2782 conditions per place. [2024-06-21 20:38:42,860 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 150 selfloop transitions, 16 changer transitions 0/199 dead transitions. [2024-06-21 20:38:42,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 199 transitions, 1922 flow [2024-06-21 20:38:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:38:42,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:38:42,861 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1512 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:38:42,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 199 transitions, 1922 flow [2024-06-21 20:38:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 199 transitions, 1755 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:43,046 INFO L231 Difference]: Finished difference. Result has 160 places, 183 transitions, 1427 flow [2024-06-21 20:38:43,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1427, PETRI_PLACES=160, PETRI_TRANSITIONS=183} [2024-06-21 20:38:43,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 20:38:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 183 transitions, 1427 flow [2024-06-21 20:38:43,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:43,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:43,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:38:43,047 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:43,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1094922539, now seen corresponding path program 7 times [2024-06-21 20:38:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4274160] [2024-06-21 20:38:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4274160] [2024-06-21 20:38:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4274160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:43,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624479869] [2024-06-21 20:38:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:43,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:44,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:44,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 183 transitions, 1427 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:44,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:44,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:44,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:44,901 INFO L124 PetriNetUnfolderBase]: 2297/3559 cut-off events. [2024-06-21 20:38:44,901 INFO L125 PetriNetUnfolderBase]: For 325295/325295 co-relation queries the response was YES. [2024-06-21 20:38:44,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28617 conditions, 3559 events. 2297/3559 cut-off events. For 325295/325295 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18565 event pairs, 598 based on Foata normal form. 4/3559 useless extension candidates. Maximal degree in co-relation 28542. Up to 3219 conditions per place. [2024-06-21 20:38:44,928 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 54 changer transitions 0/213 dead transitions. [2024-06-21 20:38:44,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 1979 flow [2024-06-21 20:38:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:38:44,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:38:44,929 INFO L175 Difference]: Start difference. First operand has 160 places, 183 transitions, 1427 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:38:44,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 1979 flow [2024-06-21 20:38:45,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 213 transitions, 1919 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:45,158 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 1552 flow [2024-06-21 20:38:45,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1552, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-21 20:38:45,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 20:38:45,159 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 1552 flow [2024-06-21 20:38:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:45,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:45,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:38:45,159 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:45,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1803695051, now seen corresponding path program 8 times [2024-06-21 20:38:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401852814] [2024-06-21 20:38:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:45,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:46,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401852814] [2024-06-21 20:38:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401852814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391723642] [2024-06-21 20:38:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 1552 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:46,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:46,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:47,088 INFO L124 PetriNetUnfolderBase]: 2314/3586 cut-off events. [2024-06-21 20:38:47,089 INFO L125 PetriNetUnfolderBase]: For 339636/339636 co-relation queries the response was YES. [2024-06-21 20:38:47,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 3586 events. 2314/3586 cut-off events. For 339636/339636 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18722 event pairs, 598 based on Foata normal form. 4/3586 useless extension candidates. Maximal degree in co-relation 29288. Up to 3246 conditions per place. [2024-06-21 20:38:47,122 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 51 changer transitions 0/215 dead transitions. [2024-06-21 20:38:47,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2112 flow [2024-06-21 20:38:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:38:47,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:38:47,123 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 1552 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:38:47,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2112 flow [2024-06-21 20:38:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 1945 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:47,328 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1568 flow [2024-06-21 20:38:47,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1568, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-21 20:38:47,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 20:38:47,329 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1568 flow [2024-06-21 20:38:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:47,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:47,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:47,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:38:47,329 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:47,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:47,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1809057431, now seen corresponding path program 9 times [2024-06-21 20:38:47,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:47,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386656235] [2024-06-21 20:38:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:47,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:48,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:48,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386656235] [2024-06-21 20:38:48,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386656235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:48,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:48,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351713769] [2024-06-21 20:38:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:48,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:48,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1568 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:48,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:48,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:48,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:49,169 INFO L124 PetriNetUnfolderBase]: 2331/3613 cut-off events. [2024-06-21 20:38:49,169 INFO L125 PetriNetUnfolderBase]: For 353029/353029 co-relation queries the response was YES. [2024-06-21 20:38:49,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29832 conditions, 3613 events. 2331/3613 cut-off events. For 353029/353029 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18885 event pairs, 603 based on Foata normal form. 4/3613 useless extension candidates. Maximal degree in co-relation 29755. Up to 3273 conditions per place. [2024-06-21 20:38:49,203 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-21 20:38:49,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 217 transitions, 2136 flow [2024-06-21 20:38:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:38:49,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:38:49,204 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1568 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:38:49,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 217 transitions, 2136 flow [2024-06-21 20:38:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1971 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:49,383 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 1592 flow [2024-06-21 20:38:49,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1592, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-21 20:38:49,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 20:38:49,384 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 1592 flow [2024-06-21 20:38:49,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:49,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:49,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:49,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:38:49,384 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:49,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1809205301, now seen corresponding path program 10 times [2024-06-21 20:38:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992317182] [2024-06-21 20:38:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992317182] [2024-06-21 20:38:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992317182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:50,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128584663] [2024-06-21 20:38:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:50,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:50,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 1592 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:50,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:50,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:50,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:51,156 INFO L124 PetriNetUnfolderBase]: 2323/3601 cut-off events. [2024-06-21 20:38:51,156 INFO L125 PetriNetUnfolderBase]: For 359537/359537 co-relation queries the response was YES. [2024-06-21 20:38:51,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29722 conditions, 3601 events. 2323/3601 cut-off events. For 359537/359537 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18812 event pairs, 596 based on Foata normal form. 4/3601 useless extension candidates. Maximal degree in co-relation 29644. Up to 3184 conditions per place. [2024-06-21 20:38:51,186 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 59 changer transitions 0/220 dead transitions. [2024-06-21 20:38:51,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 220 transitions, 2172 flow [2024-06-21 20:38:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:38:51,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:38:51,188 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 1592 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:38:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 220 transitions, 2172 flow [2024-06-21 20:38:51,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 220 transitions, 2001 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:51,418 INFO L231 Difference]: Finished difference. Result has 170 places, 191 transitions, 1628 flow [2024-06-21 20:38:51,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1628, PETRI_PLACES=170, PETRI_TRANSITIONS=191} [2024-06-21 20:38:51,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-21 20:38:51,419 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 191 transitions, 1628 flow [2024-06-21 20:38:51,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:51,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:51,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:38:51,419 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:51,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1660257626, now seen corresponding path program 2 times [2024-06-21 20:38:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:51,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300463667] [2024-06-21 20:38:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:52,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300463667] [2024-06-21 20:38:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300463667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:52,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:52,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734277237] [2024-06-21 20:38:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:52,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 191 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:52,969 INFO L124 PetriNetUnfolderBase]: 1976/3214 cut-off events. [2024-06-21 20:38:52,970 INFO L125 PetriNetUnfolderBase]: For 362552/362558 co-relation queries the response was YES. [2024-06-21 20:38:52,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27645 conditions, 3214 events. 1976/3214 cut-off events. For 362552/362558 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17907 event pairs, 573 based on Foata normal form. 7/3197 useless extension candidates. Maximal degree in co-relation 27566. Up to 2816 conditions per place. [2024-06-21 20:38:52,999 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 28 changer transitions 0/210 dead transitions. [2024-06-21 20:38:52,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 210 transitions, 2208 flow [2024-06-21 20:38:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:38:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:38:53,000 INFO L175 Difference]: Start difference. First operand has 170 places, 191 transitions, 1628 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:38:53,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 210 transitions, 2208 flow [2024-06-21 20:38:53,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 210 transitions, 2019 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:53,238 INFO L231 Difference]: Finished difference. Result has 171 places, 199 transitions, 1618 flow [2024-06-21 20:38:53,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=171, PETRI_TRANSITIONS=199} [2024-06-21 20:38:53,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 20:38:53,239 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 199 transitions, 1618 flow [2024-06-21 20:38:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:53,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:53,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:38:53,239 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:53,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1659782396, now seen corresponding path program 3 times [2024-06-21 20:38:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:53,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111941316] [2024-06-21 20:38:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111941316] [2024-06-21 20:38:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111941316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:54,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243431495] [2024-06-21 20:38:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:54,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:54,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 199 transitions, 1618 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:54,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:54,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:54,692 INFO L124 PetriNetUnfolderBase]: 1973/3210 cut-off events. [2024-06-21 20:38:54,692 INFO L125 PetriNetUnfolderBase]: For 372258/372264 co-relation queries the response was YES. [2024-06-21 20:38:54,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27746 conditions, 3210 events. 1973/3210 cut-off events. For 372258/372264 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17886 event pairs, 573 based on Foata normal form. 7/3193 useless extension candidates. Maximal degree in co-relation 27665. Up to 2825 conditions per place. [2024-06-21 20:38:54,722 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 152 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-21 20:38:54,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 1995 flow [2024-06-21 20:38:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:38:54,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:38:54,723 INFO L175 Difference]: Start difference. First operand has 171 places, 199 transitions, 1618 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:38:54,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 1995 flow [2024-06-21 20:38:55,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 210 transitions, 1906 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:55,008 INFO L231 Difference]: Finished difference. Result has 175 places, 200 transitions, 1586 flow [2024-06-21 20:38:55,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1586, PETRI_PLACES=175, PETRI_TRANSITIONS=200} [2024-06-21 20:38:55,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 20:38:55,009 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 200 transitions, 1586 flow [2024-06-21 20:38:55,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:55,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:55,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:38:55,009 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:55,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1423611810, now seen corresponding path program 1 times [2024-06-21 20:38:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:55,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636412185] [2024-06-21 20:38:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636412185] [2024-06-21 20:38:55,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636412185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:55,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:55,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419107594] [2024-06-21 20:38:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:55,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:55,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 200 transitions, 1586 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:56,389 INFO L124 PetriNetUnfolderBase]: 2191/3474 cut-off events. [2024-06-21 20:38:56,389 INFO L125 PetriNetUnfolderBase]: For 387431/387431 co-relation queries the response was YES. [2024-06-21 20:38:56,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29501 conditions, 3474 events. 2191/3474 cut-off events. For 387431/387431 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18614 event pairs, 539 based on Foata normal form. 1/3474 useless extension candidates. Maximal degree in co-relation 29418. Up to 3196 conditions per place. [2024-06-21 20:38:56,424 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 195 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-21 20:38:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 219 transitions, 2102 flow [2024-06-21 20:38:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:38:56,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:38:56,426 INFO L175 Difference]: Start difference. First operand has 175 places, 200 transitions, 1586 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:38:56,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 219 transitions, 2102 flow [2024-06-21 20:38:56,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 219 transitions, 2056 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:56,643 INFO L231 Difference]: Finished difference. Result has 177 places, 203 transitions, 1638 flow [2024-06-21 20:38:56,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1638, PETRI_PLACES=177, PETRI_TRANSITIONS=203} [2024-06-21 20:38:56,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 20:38:56,644 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 203 transitions, 1638 flow [2024-06-21 20:38:56,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:56,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:56,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:38:56,644 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:56,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash 260186620, now seen corresponding path program 2 times [2024-06-21 20:38:56,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204085449] [2024-06-21 20:38:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:57,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204085449] [2024-06-21 20:38:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204085449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:57,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488014398] [2024-06-21 20:38:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:57,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:57,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 203 transitions, 1638 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:57,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:57,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:57,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:58,030 INFO L124 PetriNetUnfolderBase]: 2196/3481 cut-off events. [2024-06-21 20:38:58,031 INFO L125 PetriNetUnfolderBase]: For 399778/399778 co-relation queries the response was YES. [2024-06-21 20:38:58,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30035 conditions, 3481 events. 2196/3481 cut-off events. For 399778/399778 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18667 event pairs, 539 based on Foata normal form. 1/3481 useless extension candidates. Maximal degree in co-relation 29951. Up to 3197 conditions per place. [2024-06-21 20:38:58,063 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 190 selfloop transitions, 19 changer transitions 0/219 dead transitions. [2024-06-21 20:38:58,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 2152 flow [2024-06-21 20:38:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:38:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 20:38:58,064 INFO L175 Difference]: Start difference. First operand has 177 places, 203 transitions, 1638 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:38:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 2152 flow [2024-06-21 20:38:58,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 219 transitions, 2076 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:58,293 INFO L231 Difference]: Finished difference. Result has 179 places, 206 transitions, 1676 flow [2024-06-21 20:38:58,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1676, PETRI_PLACES=179, PETRI_TRANSITIONS=206} [2024-06-21 20:38:58,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-21 20:38:58,294 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 206 transitions, 1676 flow [2024-06-21 20:38:58,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:58,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:58,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:58,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:38:58,294 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:58,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1423791548, now seen corresponding path program 1 times [2024-06-21 20:38:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:58,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179196391] [2024-06-21 20:38:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:58,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:59,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179196391] [2024-06-21 20:38:59,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179196391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:59,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:59,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:59,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372130871] [2024-06-21 20:38:59,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:59,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:59,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:59,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:59,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 206 transitions, 1676 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:59,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:59,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:59,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:59,844 INFO L124 PetriNetUnfolderBase]: 2083/3374 cut-off events. [2024-06-21 20:38:59,844 INFO L125 PetriNetUnfolderBase]: For 412767/412767 co-relation queries the response was YES. [2024-06-21 20:38:59,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29571 conditions, 3374 events. 2083/3374 cut-off events. For 412767/412767 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18586 event pairs, 533 based on Foata normal form. 3/3376 useless extension candidates. Maximal degree in co-relation 29486. Up to 2933 conditions per place. [2024-06-21 20:38:59,940 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 176 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-21 20:38:59,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 223 transitions, 2138 flow [2024-06-21 20:38:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:38:59,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:38:59,941 INFO L175 Difference]: Start difference. First operand has 179 places, 206 transitions, 1676 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:38:59,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 223 transitions, 2138 flow [2024-06-21 20:39:00,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 223 transitions, 2046 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:00,240 INFO L231 Difference]: Finished difference. Result has 181 places, 209 transitions, 1672 flow [2024-06-21 20:39:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1672, PETRI_PLACES=181, PETRI_TRANSITIONS=209} [2024-06-21 20:39:00,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 20:39:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 209 transitions, 1672 flow [2024-06-21 20:39:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:39:00,242 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:00,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1660263578, now seen corresponding path program 2 times [2024-06-21 20:39:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804282797] [2024-06-21 20:39:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:01,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804282797] [2024-06-21 20:39:01,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804282797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:01,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891918791] [2024-06-21 20:39:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:01,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:01,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:01,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 209 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:01,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:01,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:01,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:01,774 INFO L124 PetriNetUnfolderBase]: 2093/3391 cut-off events. [2024-06-21 20:39:01,774 INFO L125 PetriNetUnfolderBase]: For 424802/424805 co-relation queries the response was YES. [2024-06-21 20:39:01,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30135 conditions, 3391 events. 2093/3391 cut-off events. For 424802/424805 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18737 event pairs, 537 based on Foata normal form. 5/3394 useless extension candidates. Maximal degree in co-relation 30049. Up to 2915 conditions per place. [2024-06-21 20:39:01,804 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 166 selfloop transitions, 29 changer transitions 0/228 dead transitions. [2024-06-21 20:39:01,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 228 transitions, 2322 flow [2024-06-21 20:39:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:39:01,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:39:01,806 INFO L175 Difference]: Start difference. First operand has 181 places, 209 transitions, 1672 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:39:01,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 228 transitions, 2322 flow [2024-06-21 20:39:02,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 228 transitions, 2256 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:02,071 INFO L231 Difference]: Finished difference. Result has 183 places, 215 transitions, 1785 flow [2024-06-21 20:39:02,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1785, PETRI_PLACES=183, PETRI_TRANSITIONS=215} [2024-06-21 20:39:02,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-21 20:39:02,071 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 215 transitions, 1785 flow [2024-06-21 20:39:02,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:02,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:02,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:02,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:39:02,072 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:02,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:02,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1659966660, now seen corresponding path program 3 times [2024-06-21 20:39:02,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:02,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884245728] [2024-06-21 20:39:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:02,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:02,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:02,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884245728] [2024-06-21 20:39:02,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884245728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:02,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:02,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370742997] [2024-06-21 20:39:02,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:02,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:02,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:02,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:03,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:03,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 215 transitions, 1785 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:03,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:03,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:03,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:03,568 INFO L124 PetriNetUnfolderBase]: 2213/3511 cut-off events. [2024-06-21 20:39:03,569 INFO L125 PetriNetUnfolderBase]: For 436683/436686 co-relation queries the response was YES. [2024-06-21 20:39:03,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31512 conditions, 3511 events. 2213/3511 cut-off events. For 436683/436686 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18906 event pairs, 546 based on Foata normal form. 3/3511 useless extension candidates. Maximal degree in co-relation 31425. Up to 3212 conditions per place. [2024-06-21 20:39:03,600 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 192 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-21 20:39:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 228 transitions, 2319 flow [2024-06-21 20:39:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:39:03,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 20:39:03,601 INFO L175 Difference]: Start difference. First operand has 183 places, 215 transitions, 1785 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:39:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 228 transitions, 2319 flow [2024-06-21 20:39:03,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 228 transitions, 2247 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:39:03,871 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 1851 flow [2024-06-21 20:39:03,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1851, PETRI_PLACES=187, PETRI_TRANSITIONS=218} [2024-06-21 20:39:03,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-21 20:39:03,872 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 1851 flow [2024-06-21 20:39:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:03,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:03,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:03,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:39:03,873 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:03,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 266673618, now seen corresponding path program 3 times [2024-06-21 20:39:03,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:03,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319602900] [2024-06-21 20:39:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319602900] [2024-06-21 20:39:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319602900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433341627] [2024-06-21 20:39:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:04,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:04,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:05,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:05,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 218 transitions, 1851 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:05,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:05,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:05,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:05,578 INFO L124 PetriNetUnfolderBase]: 2084/3379 cut-off events. [2024-06-21 20:39:05,578 INFO L125 PetriNetUnfolderBase]: For 442605/442608 co-relation queries the response was YES. [2024-06-21 20:39:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 3379 events. 2084/3379 cut-off events. For 442605/442608 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18759 event pairs, 535 based on Foata normal form. 4/3381 useless extension candidates. Maximal degree in co-relation 30591. Up to 2934 conditions per place. [2024-06-21 20:39:05,609 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-21 20:39:05,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 231 transitions, 2317 flow [2024-06-21 20:39:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:39:05,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:39:05,610 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 1851 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:39:05,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 231 transitions, 2317 flow [2024-06-21 20:39:05,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 231 transitions, 2201 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:05,901 INFO L231 Difference]: Finished difference. Result has 189 places, 221 transitions, 1833 flow [2024-06-21 20:39:05,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1833, PETRI_PLACES=189, PETRI_TRANSITIONS=221} [2024-06-21 20:39:05,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 20:39:05,902 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 221 transitions, 1833 flow [2024-06-21 20:39:05,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:05,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:05,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:39:05,902 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:05,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 94647120, now seen corresponding path program 1 times [2024-06-21 20:39:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:05,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427892212] [2024-06-21 20:39:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:06,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427892212] [2024-06-21 20:39:06,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427892212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:06,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:06,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304255326] [2024-06-21 20:39:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:06,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 221 transitions, 1833 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:06,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:07,838 INFO L124 PetriNetUnfolderBase]: 2527/3952 cut-off events. [2024-06-21 20:39:07,838 INFO L125 PetriNetUnfolderBase]: For 534589/534589 co-relation queries the response was YES. [2024-06-21 20:39:07,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36222 conditions, 3952 events. 2527/3952 cut-off events. For 534589/534589 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21446 event pairs, 480 based on Foata normal form. 16/3967 useless extension candidates. Maximal degree in co-relation 36132. Up to 3303 conditions per place. [2024-06-21 20:39:07,876 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-21 20:39:07,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 278 transitions, 2893 flow [2024-06-21 20:39:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:39:07,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 20:39:07,877 INFO L175 Difference]: Start difference. First operand has 189 places, 221 transitions, 1833 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:39:07,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 278 transitions, 2893 flow [2024-06-21 20:39:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 278 transitions, 2821 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:08,136 INFO L231 Difference]: Finished difference. Result has 195 places, 223 transitions, 1939 flow [2024-06-21 20:39:08,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=195, PETRI_TRANSITIONS=223} [2024-06-21 20:39:08,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 20:39:08,137 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 223 transitions, 1939 flow [2024-06-21 20:39:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:08,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:39:08,137 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1454781616, now seen corresponding path program 2 times [2024-06-21 20:39:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112418952] [2024-06-21 20:39:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112418952] [2024-06-21 20:39:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112418952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:09,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:09,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607691765] [2024-06-21 20:39:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:09,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:09,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 223 transitions, 1939 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:09,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:09,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:09,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:10,217 INFO L124 PetriNetUnfolderBase]: 2585/4051 cut-off events. [2024-06-21 20:39:10,217 INFO L125 PetriNetUnfolderBase]: For 550434/550434 co-relation queries the response was YES. [2024-06-21 20:39:10,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37282 conditions, 4051 events. 2585/4051 cut-off events. For 550434/550434 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22105 event pairs, 629 based on Foata normal form. 16/4066 useless extension candidates. Maximal degree in co-relation 37191. Up to 3487 conditions per place. [2024-06-21 20:39:10,254 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 25 changer transitions 0/274 dead transitions. [2024-06-21 20:39:10,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 274 transitions, 2929 flow [2024-06-21 20:39:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 20:39:10,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:39:10,255 INFO L175 Difference]: Start difference. First operand has 195 places, 223 transitions, 1939 flow. Second operand 10 states and 200 transitions. [2024-06-21 20:39:10,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 274 transitions, 2929 flow [2024-06-21 20:39:10,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 274 transitions, 2847 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:10,624 INFO L231 Difference]: Finished difference. Result has 198 places, 224 transitions, 1971 flow [2024-06-21 20:39:10,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1971, PETRI_PLACES=198, PETRI_TRANSITIONS=224} [2024-06-21 20:39:10,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 20:39:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 224 transitions, 1971 flow [2024-06-21 20:39:10,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:39:10,625 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1450020016, now seen corresponding path program 3 times [2024-06-21 20:39:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075683197] [2024-06-21 20:39:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:11,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:11,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075683197] [2024-06-21 20:39:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075683197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:11,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:11,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:11,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275403143] [2024-06-21 20:39:11,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:11,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:11,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:11,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:11,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 224 transitions, 1971 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:11,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:11,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:11,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:12,736 INFO L124 PetriNetUnfolderBase]: 2635/4147 cut-off events. [2024-06-21 20:39:12,736 INFO L125 PetriNetUnfolderBase]: For 572352/572352 co-relation queries the response was YES. [2024-06-21 20:39:12,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37545 conditions, 4147 events. 2635/4147 cut-off events. For 572352/572352 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22890 event pairs, 676 based on Foata normal form. 20/4166 useless extension candidates. Maximal degree in co-relation 37452. Up to 3780 conditions per place. [2024-06-21 20:39:12,777 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-21 20:39:12,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 268 transitions, 2693 flow [2024-06-21 20:39:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 20:39:12,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 20:39:12,779 INFO L175 Difference]: Start difference. First operand has 198 places, 224 transitions, 1971 flow. Second operand 10 states and 192 transitions. [2024-06-21 20:39:12,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 268 transitions, 2693 flow [2024-06-21 20:39:13,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 2597 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:13,255 INFO L231 Difference]: Finished difference. Result has 200 places, 225 transitions, 1982 flow [2024-06-21 20:39:13,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1982, PETRI_PLACES=200, PETRI_TRANSITIONS=225} [2024-06-21 20:39:13,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 20:39:13,256 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 225 transitions, 1982 flow [2024-06-21 20:39:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:13,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:39:13,256 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2054999932, now seen corresponding path program 4 times [2024-06-21 20:39:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354690362] [2024-06-21 20:39:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:14,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:14,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354690362] [2024-06-21 20:39:14,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354690362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:14,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:14,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104091868] [2024-06-21 20:39:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:14,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 225 transitions, 1982 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:14,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:15,328 INFO L124 PetriNetUnfolderBase]: 2607/4103 cut-off events. [2024-06-21 20:39:15,328 INFO L125 PetriNetUnfolderBase]: For 547373/547373 co-relation queries the response was YES. [2024-06-21 20:39:15,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36156 conditions, 4103 events. 2607/4103 cut-off events. For 547373/547373 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 22549 event pairs, 636 based on Foata normal form. 16/4118 useless extension candidates. Maximal degree in co-relation 36062. Up to 3626 conditions per place. [2024-06-21 20:39:15,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 23 changer transitions 0/272 dead transitions. [2024-06-21 20:39:15,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 272 transitions, 2674 flow [2024-06-21 20:39:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:39:15,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:39:15,369 INFO L175 Difference]: Start difference. First operand has 200 places, 225 transitions, 1982 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:39:15,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 272 transitions, 2674 flow [2024-06-21 20:39:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 272 transitions, 2575 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:15,752 INFO L231 Difference]: Finished difference. Result has 202 places, 225 transitions, 1935 flow [2024-06-21 20:39:15,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1935, PETRI_PLACES=202, PETRI_TRANSITIONS=225} [2024-06-21 20:39:15,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-21 20:39:15,753 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 225 transitions, 1935 flow [2024-06-21 20:39:15,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:15,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:15,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:15,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:39:15,753 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:15,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1647609102, now seen corresponding path program 5 times [2024-06-21 20:39:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:15,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601923339] [2024-06-21 20:39:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601923339] [2024-06-21 20:39:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601923339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776448043] [2024-06-21 20:39:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:16,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:16,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 225 transitions, 1935 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:16,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:16,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:16,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:17,880 INFO L124 PetriNetUnfolderBase]: 2682/4223 cut-off events. [2024-06-21 20:39:17,880 INFO L125 PetriNetUnfolderBase]: For 567678/567681 co-relation queries the response was YES. [2024-06-21 20:39:17,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36876 conditions, 4223 events. 2682/4223 cut-off events. For 567678/567681 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23460 event pairs, 624 based on Foata normal form. 20/4240 useless extension candidates. Maximal degree in co-relation 36781. Up to 3458 conditions per place. [2024-06-21 20:39:17,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 175 selfloop transitions, 88 changer transitions 0/268 dead transitions. [2024-06-21 20:39:17,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 268 transitions, 2659 flow [2024-06-21 20:39:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:39:17,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 20:39:17,925 INFO L175 Difference]: Start difference. First operand has 202 places, 225 transitions, 1935 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:39:17,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 268 transitions, 2659 flow [2024-06-21 20:39:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 268 transitions, 2590 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:18,301 INFO L231 Difference]: Finished difference. Result has 203 places, 226 transitions, 2109 flow [2024-06-21 20:39:18,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2109, PETRI_PLACES=203, PETRI_TRANSITIONS=226} [2024-06-21 20:39:18,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 20:39:18,301 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 226 transitions, 2109 flow [2024-06-21 20:39:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:18,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:18,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:39:18,302 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:18,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:18,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2136845734, now seen corresponding path program 6 times [2024-06-21 20:39:18,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:18,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225011477] [2024-06-21 20:39:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:19,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225011477] [2024-06-21 20:39:19,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225011477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:19,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:19,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:19,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391686133] [2024-06-21 20:39:19,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:19,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:19,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:19,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:19,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 226 transitions, 2109 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:19,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:19,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:20,584 INFO L124 PetriNetUnfolderBase]: 2757/4358 cut-off events. [2024-06-21 20:39:20,584 INFO L125 PetriNetUnfolderBase]: For 592399/592402 co-relation queries the response was YES. [2024-06-21 20:39:20,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38328 conditions, 4358 events. 2757/4358 cut-off events. For 592399/592402 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24549 event pairs, 648 based on Foata normal form. 20/4375 useless extension candidates. Maximal degree in co-relation 38232. Up to 3583 conditions per place. [2024-06-21 20:39:20,624 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 86 changer transitions 0/270 dead transitions. [2024-06-21 20:39:20,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 270 transitions, 2843 flow [2024-06-21 20:39:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:39:20,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 20:39:20,625 INFO L175 Difference]: Start difference. First operand has 203 places, 226 transitions, 2109 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:39:20,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 270 transitions, 2843 flow [2024-06-21 20:39:21,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 270 transitions, 2632 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:21,057 INFO L231 Difference]: Finished difference. Result has 205 places, 227 transitions, 2139 flow [2024-06-21 20:39:21,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2139, PETRI_PLACES=205, PETRI_TRANSITIONS=227} [2024-06-21 20:39:21,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-21 20:39:21,058 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 227 transitions, 2139 flow [2024-06-21 20:39:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:21,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:21,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:39:21,058 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:21,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2136668104, now seen corresponding path program 7 times [2024-06-21 20:39:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:21,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313353] [2024-06-21 20:39:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313353] [2024-06-21 20:39:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:22,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:22,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112373367] [2024-06-21 20:39:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:22,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:22,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:22,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:22,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 227 transitions, 2139 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:22,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:22,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:22,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:23,325 INFO L124 PetriNetUnfolderBase]: 2815/4451 cut-off events. [2024-06-21 20:39:23,325 INFO L125 PetriNetUnfolderBase]: For 601441/601444 co-relation queries the response was YES. [2024-06-21 20:39:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38969 conditions, 4451 events. 2815/4451 cut-off events. For 601441/601444 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25196 event pairs, 625 based on Foata normal form. 16/4464 useless extension candidates. Maximal degree in co-relation 38872. Up to 3451 conditions per place. [2024-06-21 20:39:23,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 89 changer transitions 0/274 dead transitions. [2024-06-21 20:39:23,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 274 transitions, 2897 flow [2024-06-21 20:39:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 20:39:23,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 20:39:23,369 INFO L175 Difference]: Start difference. First operand has 205 places, 227 transitions, 2139 flow. Second operand 10 states and 206 transitions. [2024-06-21 20:39:23,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 274 transitions, 2897 flow [2024-06-21 20:39:23,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 274 transitions, 2688 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:23,871 INFO L231 Difference]: Finished difference. Result has 207 places, 228 transitions, 2178 flow [2024-06-21 20:39:23,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2178, PETRI_PLACES=207, PETRI_TRANSITIONS=228} [2024-06-21 20:39:23,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 20:39:23,871 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 228 transitions, 2178 flow [2024-06-21 20:39:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:23,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:23,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:39:23,872 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1970611954, now seen corresponding path program 8 times [2024-06-21 20:39:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2674012] [2024-06-21 20:39:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2674012] [2024-06-21 20:39:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2674012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:24,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965256876] [2024-06-21 20:39:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:24,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:24,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 228 transitions, 2178 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:24,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:24,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:26,116 INFO L124 PetriNetUnfolderBase]: 2890/4591 cut-off events. [2024-06-21 20:39:26,116 INFO L125 PetriNetUnfolderBase]: For 629293/629296 co-relation queries the response was YES. [2024-06-21 20:39:26,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39969 conditions, 4591 events. 2890/4591 cut-off events. For 629293/629296 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26373 event pairs, 678 based on Foata normal form. 20/4608 useless extension candidates. Maximal degree in co-relation 39871. Up to 3806 conditions per place. [2024-06-21 20:39:26,160 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 182 selfloop transitions, 85 changer transitions 0/272 dead transitions. [2024-06-21 20:39:26,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 272 transitions, 2920 flow [2024-06-21 20:39:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 20:39:26,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:39:26,161 INFO L175 Difference]: Start difference. First operand has 207 places, 228 transitions, 2178 flow. Second operand 10 states and 205 transitions. [2024-06-21 20:39:26,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 272 transitions, 2920 flow [2024-06-21 20:39:26,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 2692 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:26,615 INFO L231 Difference]: Finished difference. Result has 209 places, 229 transitions, 2193 flow [2024-06-21 20:39:26,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2193, PETRI_PLACES=209, PETRI_TRANSITIONS=229} [2024-06-21 20:39:26,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-21 20:39:26,616 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 229 transitions, 2193 flow [2024-06-21 20:39:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:26,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:26,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:39:26,616 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:26,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1824745272, now seen corresponding path program 9 times [2024-06-21 20:39:26,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:26,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221450426] [2024-06-21 20:39:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:27,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221450426] [2024-06-21 20:39:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221450426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:27,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:27,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:27,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207924121] [2024-06-21 20:39:27,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:27,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:27,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:27,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 229 transitions, 2193 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:27,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:27,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:27,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:28,786 INFO L124 PetriNetUnfolderBase]: 2948/4704 cut-off events. [2024-06-21 20:39:28,787 INFO L125 PetriNetUnfolderBase]: For 639303/639306 co-relation queries the response was YES. [2024-06-21 20:39:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40581 conditions, 4704 events. 2948/4704 cut-off events. For 639303/639306 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27309 event pairs, 683 based on Foata normal form. 16/4717 useless extension candidates. Maximal degree in co-relation 40482. Up to 3794 conditions per place. [2024-06-21 20:39:28,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 87 changer transitions 0/277 dead transitions. [2024-06-21 20:39:28,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 277 transitions, 2965 flow [2024-06-21 20:39:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 20:39:28,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-21 20:39:28,831 INFO L175 Difference]: Start difference. First operand has 209 places, 229 transitions, 2193 flow. Second operand 10 states and 209 transitions. [2024-06-21 20:39:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 277 transitions, 2965 flow [2024-06-21 20:39:29,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 277 transitions, 2754 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:29,259 INFO L231 Difference]: Finished difference. Result has 211 places, 230 transitions, 2230 flow [2024-06-21 20:39:29,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2230, PETRI_PLACES=211, PETRI_TRANSITIONS=230} [2024-06-21 20:39:29,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 20:39:29,259 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 230 transitions, 2230 flow [2024-06-21 20:39:29,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:29,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:29,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:29,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:39:29,260 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1762004188, now seen corresponding path program 10 times [2024-06-21 20:39:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:29,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600678164] [2024-06-21 20:39:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:29,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:30,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600678164] [2024-06-21 20:39:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600678164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:30,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:30,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693449063] [2024-06-21 20:39:30,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:30,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 230 transitions, 2230 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:30,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:30,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:30,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:31,434 INFO L124 PetriNetUnfolderBase]: 3006/4797 cut-off events. [2024-06-21 20:39:31,434 INFO L125 PetriNetUnfolderBase]: For 656539/656542 co-relation queries the response was YES. [2024-06-21 20:39:31,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41241 conditions, 4797 events. 3006/4797 cut-off events. For 656539/656542 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27980 event pairs, 679 based on Foata normal form. 16/4810 useless extension candidates. Maximal degree in co-relation 41141. Up to 3409 conditions per place. [2024-06-21 20:39:31,481 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 94 changer transitions 0/278 dead transitions. [2024-06-21 20:39:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 278 transitions, 3004 flow [2024-06-21 20:39:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 20:39:31,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2024-06-21 20:39:31,482 INFO L175 Difference]: Start difference. First operand has 211 places, 230 transitions, 2230 flow. Second operand 10 states and 208 transitions. [2024-06-21 20:39:31,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 278 transitions, 3004 flow [2024-06-21 20:39:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 278 transitions, 2776 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:32,023 INFO L231 Difference]: Finished difference. Result has 213 places, 231 transitions, 2266 flow [2024-06-21 20:39:32,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2266, PETRI_PLACES=213, PETRI_TRANSITIONS=231} [2024-06-21 20:39:32,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 20:39:32,024 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 231 transitions, 2266 flow [2024-06-21 20:39:32,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:32,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:32,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:39:32,024 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:32,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash -529552313, now seen corresponding path program 1 times [2024-06-21 20:39:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633078172] [2024-06-21 20:39:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:32,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633078172] [2024-06-21 20:39:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633078172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:32,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247098621] [2024-06-21 20:39:32,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:32,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:32,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:32,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 231 transitions, 2266 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:32,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:32,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:32,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:33,650 INFO L124 PetriNetUnfolderBase]: 2828/4605 cut-off events. [2024-06-21 20:39:33,651 INFO L125 PetriNetUnfolderBase]: For 628794/628797 co-relation queries the response was YES. [2024-06-21 20:39:33,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39821 conditions, 4605 events. 2828/4605 cut-off events. For 628794/628797 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27757 event pairs, 761 based on Foata normal form. 3/4570 useless extension candidates. Maximal degree in co-relation 39720. Up to 4192 conditions per place. [2024-06-21 20:39:33,704 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 205 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-06-21 20:39:33,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 253 transitions, 2812 flow [2024-06-21 20:39:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:39:33,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:39:33,705 INFO L175 Difference]: Start difference. First operand has 213 places, 231 transitions, 2266 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:39:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 253 transitions, 2812 flow [2024-06-21 20:39:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 253 transitions, 2568 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:34,335 INFO L231 Difference]: Finished difference. Result has 212 places, 234 transitions, 2122 flow [2024-06-21 20:39:34,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2122, PETRI_PLACES=212, PETRI_TRANSITIONS=234} [2024-06-21 20:39:34,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-21 20:39:34,336 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 234 transitions, 2122 flow [2024-06-21 20:39:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:34,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:34,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:39:34,336 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:34,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash -21382313, now seen corresponding path program 2 times [2024-06-21 20:39:34,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300263858] [2024-06-21 20:39:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:35,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:35,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300263858] [2024-06-21 20:39:35,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300263858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:35,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:35,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:35,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184156666] [2024-06-21 20:39:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:35,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:35,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:35,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:35,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 234 transitions, 2122 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:35,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:35,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:35,999 INFO L124 PetriNetUnfolderBase]: 2841/4620 cut-off events. [2024-06-21 20:39:35,999 INFO L125 PetriNetUnfolderBase]: For 636644/636647 co-relation queries the response was YES. [2024-06-21 20:39:36,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39668 conditions, 4620 events. 2841/4620 cut-off events. For 636644/636647 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27830 event pairs, 756 based on Foata normal form. 3/4585 useless extension candidates. Maximal degree in co-relation 39566. Up to 4200 conditions per place. [2024-06-21 20:39:36,042 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-06-21 20:39:36,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 259 transitions, 2899 flow [2024-06-21 20:39:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:39:36,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:39:36,043 INFO L175 Difference]: Start difference. First operand has 212 places, 234 transitions, 2122 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:39:36,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 259 transitions, 2899 flow [2024-06-21 20:39:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 259 transitions, 2821 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:36,511 INFO L231 Difference]: Finished difference. Result has 215 places, 242 transitions, 2248 flow [2024-06-21 20:39:36,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=215, PETRI_TRANSITIONS=242} [2024-06-21 20:39:36,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-21 20:39:36,512 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 242 transitions, 2248 flow [2024-06-21 20:39:36,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:36,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:36,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:36,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:39:36,512 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:36,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1647362838, now seen corresponding path program 1 times [2024-06-21 20:39:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:36,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216325296] [2024-06-21 20:39:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216325296] [2024-06-21 20:39:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216325296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:37,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313555642] [2024-06-21 20:39:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:37,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:37,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:37,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 242 transitions, 2248 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:37,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:37,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:37,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:38,718 INFO L124 PetriNetUnfolderBase]: 3041/4859 cut-off events. [2024-06-21 20:39:38,718 INFO L125 PetriNetUnfolderBase]: For 670614/670617 co-relation queries the response was YES. [2024-06-21 20:39:38,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41857 conditions, 4859 events. 3041/4859 cut-off events. For 670614/670617 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28494 event pairs, 738 based on Foata normal form. 4/4860 useless extension candidates. Maximal degree in co-relation 41753. Up to 4452 conditions per place. [2024-06-21 20:39:38,767 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-21 20:39:38,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 283 transitions, 2995 flow [2024-06-21 20:39:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 20:39:38,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 20:39:38,768 INFO L175 Difference]: Start difference. First operand has 215 places, 242 transitions, 2248 flow. Second operand 10 states and 193 transitions. [2024-06-21 20:39:38,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 283 transitions, 2995 flow [2024-06-21 20:39:39,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 283 transitions, 2913 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:39:39,285 INFO L231 Difference]: Finished difference. Result has 223 places, 247 transitions, 2372 flow [2024-06-21 20:39:39,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2372, PETRI_PLACES=223, PETRI_TRANSITIONS=247} [2024-06-21 20:39:39,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-21 20:39:39,285 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 247 transitions, 2372 flow [2024-06-21 20:39:39,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:39,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:39,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:39:39,286 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:39,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:39,286 INFO L85 PathProgramCache]: Analyzing trace with hash -13963083, now seen corresponding path program 1 times [2024-06-21 20:39:39,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:39,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385417306] [2024-06-21 20:39:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:39,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:40,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385417306] [2024-06-21 20:39:40,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385417306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:40,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418992590] [2024-06-21 20:39:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:40,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:40,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 247 transitions, 2372 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:40,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:40,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:40,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:41,317 INFO L124 PetriNetUnfolderBase]: 2708/4470 cut-off events. [2024-06-21 20:39:41,317 INFO L125 PetriNetUnfolderBase]: For 675608/675620 co-relation queries the response was YES. [2024-06-21 20:39:41,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40374 conditions, 4470 events. 2708/4470 cut-off events. For 675608/675620 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27308 event pairs, 695 based on Foata normal form. 4/4415 useless extension candidates. Maximal degree in co-relation 40267. Up to 3918 conditions per place. [2024-06-21 20:39:41,361 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 201 selfloop transitions, 21 changer transitions 0/267 dead transitions. [2024-06-21 20:39:41,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 267 transitions, 2906 flow [2024-06-21 20:39:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:39:41,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:39:41,362 INFO L175 Difference]: Start difference. First operand has 223 places, 247 transitions, 2372 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:39:41,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 267 transitions, 2906 flow [2024-06-21 20:39:41,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 267 transitions, 2741 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:41,932 INFO L231 Difference]: Finished difference. Result has 224 places, 250 transitions, 2309 flow [2024-06-21 20:39:41,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2309, PETRI_PLACES=224, PETRI_TRANSITIONS=250} [2024-06-21 20:39:41,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-21 20:39:41,932 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 250 transitions, 2309 flow [2024-06-21 20:39:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:41,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:41,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:41,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:39:41,933 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:41,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 107213716, now seen corresponding path program 11 times [2024-06-21 20:39:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281191760] [2024-06-21 20:39:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281191760] [2024-06-21 20:39:42,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281191760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:42,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:42,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798228581] [2024-06-21 20:39:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:42,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:42,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:43,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:43,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 250 transitions, 2309 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:43,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:43,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:43,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:44,259 INFO L124 PetriNetUnfolderBase]: 3126/4990 cut-off events. [2024-06-21 20:39:44,259 INFO L125 PetriNetUnfolderBase]: For 749394/749394 co-relation queries the response was YES. [2024-06-21 20:39:44,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44163 conditions, 4990 events. 3126/4990 cut-off events. For 749394/749394 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29290 event pairs, 701 based on Foata normal form. 20/5006 useless extension candidates. Maximal degree in co-relation 44055. Up to 4193 conditions per place. [2024-06-21 20:39:44,312 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 87 changer transitions 0/291 dead transitions. [2024-06-21 20:39:44,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 291 transitions, 3101 flow [2024-06-21 20:39:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 20:39:44,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:39:44,313 INFO L175 Difference]: Start difference. First operand has 224 places, 250 transitions, 2309 flow. Second operand 10 states and 200 transitions. [2024-06-21 20:39:44,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 291 transitions, 3101 flow [2024-06-21 20:39:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 291 transitions, 3021 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:44,930 INFO L231 Difference]: Finished difference. Result has 228 places, 251 transitions, 2484 flow [2024-06-21 20:39:44,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2484, PETRI_PLACES=228, PETRI_TRANSITIONS=251} [2024-06-21 20:39:44,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-21 20:39:44,931 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 251 transitions, 2484 flow [2024-06-21 20:39:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:44,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:44,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:39:44,931 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:44,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -79792436, now seen corresponding path program 12 times [2024-06-21 20:39:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692014745] [2024-06-21 20:39:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:45,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:45,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692014745] [2024-06-21 20:39:45,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692014745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:45,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:45,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094512565] [2024-06-21 20:39:45,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:46,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:46,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 251 transitions, 2484 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:46,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:46,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:46,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:47,377 INFO L124 PetriNetUnfolderBase]: 3201/5125 cut-off events. [2024-06-21 20:39:47,377 INFO L125 PetriNetUnfolderBase]: For 782905/782905 co-relation queries the response was YES. [2024-06-21 20:39:47,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45914 conditions, 5125 events. 3201/5125 cut-off events. For 782905/782905 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30367 event pairs, 725 based on Foata normal form. 20/5141 useless extension candidates. Maximal degree in co-relation 45805. Up to 4318 conditions per place. [2024-06-21 20:39:47,428 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 86 changer transitions 0/293 dead transitions. [2024-06-21 20:39:47,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 293 transitions, 3288 flow [2024-06-21 20:39:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:39:47,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 20:39:47,430 INFO L175 Difference]: Start difference. First operand has 228 places, 251 transitions, 2484 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:39:47,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 293 transitions, 3288 flow [2024-06-21 20:39:48,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 293 transitions, 3065 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:48,038 INFO L231 Difference]: Finished difference. Result has 230 places, 252 transitions, 2516 flow [2024-06-21 20:39:48,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2516, PETRI_PLACES=230, PETRI_TRANSITIONS=252} [2024-06-21 20:39:48,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 20:39:48,039 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 252 transitions, 2516 flow [2024-06-21 20:39:48,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:48,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:48,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:48,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:39:48,039 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:48,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 100779976, now seen corresponding path program 13 times [2024-06-21 20:39:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:48,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332121376] [2024-06-21 20:39:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:48,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332121376] [2024-06-21 20:39:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332121376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:48,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:48,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360694097] [2024-06-21 20:39:48,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:48,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:49,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:49,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 252 transitions, 2516 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:49,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:50,392 INFO L124 PetriNetUnfolderBase]: 3259/5228 cut-off events. [2024-06-21 20:39:50,392 INFO L125 PetriNetUnfolderBase]: For 791749/791749 co-relation queries the response was YES. [2024-06-21 20:39:50,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46553 conditions, 5228 events. 3259/5228 cut-off events. For 791749/791749 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 31232 event pairs, 716 based on Foata normal form. 16/5240 useless extension candidates. Maximal degree in co-relation 46443. Up to 4186 conditions per place. [2024-06-21 20:39:50,449 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 203 selfloop transitions, 89 changer transitions 0/297 dead transitions. [2024-06-21 20:39:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 297 transitions, 3344 flow [2024-06-21 20:39:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:39:50,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 20:39:50,450 INFO L175 Difference]: Start difference. First operand has 230 places, 252 transitions, 2516 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:39:50,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 297 transitions, 3344 flow [2024-06-21 20:39:51,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 297 transitions, 3121 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:51,325 INFO L231 Difference]: Finished difference. Result has 232 places, 253 transitions, 2555 flow [2024-06-21 20:39:51,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2555, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2024-06-21 20:39:51,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-21 20:39:51,326 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 2555 flow [2024-06-21 20:39:51,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:51,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:51,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:39:51,326 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:51,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -561532012, now seen corresponding path program 14 times [2024-06-21 20:39:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425326303] [2024-06-21 20:39:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:51,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425326303] [2024-06-21 20:39:52,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425326303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:52,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448912703] [2024-06-21 20:39:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:52,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:52,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 2555 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:52,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:52,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:53,732 INFO L124 PetriNetUnfolderBase]: 3334/5348 cut-off events. [2024-06-21 20:39:53,733 INFO L125 PetriNetUnfolderBase]: For 824738/824738 co-relation queries the response was YES. [2024-06-21 20:39:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47554 conditions, 5348 events. 3334/5348 cut-off events. For 824738/824738 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32155 event pairs, 751 based on Foata normal form. 20/5364 useless extension candidates. Maximal degree in co-relation 47443. Up to 4541 conditions per place. [2024-06-21 20:39:53,792 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 96 changer transitions 0/293 dead transitions. [2024-06-21 20:39:53,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 293 transitions, 3351 flow [2024-06-21 20:39:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:39:53,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:39:53,793 INFO L175 Difference]: Start difference. First operand has 232 places, 253 transitions, 2555 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:39:53,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 293 transitions, 3351 flow [2024-06-21 20:39:54,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 293 transitions, 3109 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:54,463 INFO L231 Difference]: Finished difference. Result has 234 places, 254 transitions, 2592 flow [2024-06-21 20:39:54,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2592, PETRI_PLACES=234, PETRI_TRANSITIONS=254} [2024-06-21 20:39:54,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 20:39:54,464 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 254 transitions, 2592 flow [2024-06-21 20:39:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:54,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:54,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:39:54,464 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:54,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -65453804, now seen corresponding path program 15 times [2024-06-21 20:39:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134527158] [2024-06-21 20:39:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:55,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134527158] [2024-06-21 20:39:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134527158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:55,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025333529] [2024-06-21 20:39:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:55,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:55,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 254 transitions, 2592 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:55,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:55,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:55,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:57,006 INFO L124 PetriNetUnfolderBase]: 3503/5647 cut-off events. [2024-06-21 20:39:57,006 INFO L125 PetriNetUnfolderBase]: For 905290/905290 co-relation queries the response was YES. [2024-06-21 20:39:57,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51501 conditions, 5647 events. 3503/5647 cut-off events. For 905290/905290 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34531 event pairs, 778 based on Foata normal form. 16/5659 useless extension candidates. Maximal degree in co-relation 51389. Up to 4664 conditions per place. [2024-06-21 20:39:57,068 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 91 changer transitions 0/302 dead transitions. [2024-06-21 20:39:57,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 302 transitions, 3810 flow [2024-06-21 20:39:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 20:39:57,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:39:57,069 INFO L175 Difference]: Start difference. First operand has 234 places, 254 transitions, 2592 flow. Second operand 10 states and 205 transitions. [2024-06-21 20:39:57,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 302 transitions, 3810 flow [2024-06-21 20:39:57,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 302 transitions, 3563 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:57,940 INFO L231 Difference]: Finished difference. Result has 236 places, 256 transitions, 2695 flow [2024-06-21 20:39:57,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2695, PETRI_PLACES=236, PETRI_TRANSITIONS=256} [2024-06-21 20:39:57,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 20:39:57,941 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 256 transitions, 2695 flow [2024-06-21 20:39:57,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:57,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:57,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:57,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:39:57,941 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:57,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:57,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1446087078, now seen corresponding path program 16 times [2024-06-21 20:39:57,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:57,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587224520] [2024-06-21 20:39:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:57,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:58,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:58,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587224520] [2024-06-21 20:39:58,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587224520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:58,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:58,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949284734] [2024-06-21 20:39:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:59,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:59,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 256 transitions, 2695 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:59,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:00,479 INFO L124 PetriNetUnfolderBase]: 3467/5586 cut-off events. [2024-06-21 20:40:00,479 INFO L125 PetriNetUnfolderBase]: For 869219/869219 co-relation queries the response was YES. [2024-06-21 20:40:00,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49173 conditions, 5586 events. 3467/5586 cut-off events. For 869219/869219 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34148 event pairs, 766 based on Foata normal form. 20/5602 useless extension candidates. Maximal degree in co-relation 49060. Up to 4764 conditions per place. [2024-06-21 20:40:00,537 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-21 20:40:00,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 296 transitions, 3425 flow [2024-06-21 20:40:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:40:00,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 20:40:00,538 INFO L175 Difference]: Start difference. First operand has 236 places, 256 transitions, 2695 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:40:00,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 296 transitions, 3425 flow [2024-06-21 20:40:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 296 transitions, 3195 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:01,399 INFO L231 Difference]: Finished difference. Result has 240 places, 256 transitions, 2650 flow [2024-06-21 20:40:01,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2650, PETRI_PLACES=240, PETRI_TRANSITIONS=256} [2024-06-21 20:40:01,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-21 20:40:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 256 transitions, 2650 flow [2024-06-21 20:40:01,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:01,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:01,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:40:01,400 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:01,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -175722306, now seen corresponding path program 17 times [2024-06-21 20:40:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:01,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967316771] [2024-06-21 20:40:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967316771] [2024-06-21 20:40:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967316771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:02,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:02,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459108751] [2024-06-21 20:40:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:02,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:02,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:02,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 256 transitions, 2650 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:02,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:02,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:02,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:03,840 INFO L124 PetriNetUnfolderBase]: 3542/5721 cut-off events. [2024-06-21 20:40:03,840 INFO L125 PetriNetUnfolderBase]: For 878885/878885 co-relation queries the response was YES. [2024-06-21 20:40:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49889 conditions, 5721 events. 3542/5721 cut-off events. For 878885/878885 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35288 event pairs, 795 based on Foata normal form. 20/5737 useless extension candidates. Maximal degree in co-relation 49774. Up to 4889 conditions per place. [2024-06-21 20:40:03,904 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 90 changer transitions 0/297 dead transitions. [2024-06-21 20:40:03,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 297 transitions, 3464 flow [2024-06-21 20:40:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:40:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 20:40:03,906 INFO L175 Difference]: Start difference. First operand has 240 places, 256 transitions, 2650 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:40:03,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 297 transitions, 3464 flow [2024-06-21 20:40:04,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 297 transitions, 3281 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:04,697 INFO L231 Difference]: Finished difference. Result has 241 places, 257 transitions, 2738 flow [2024-06-21 20:40:04,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2738, PETRI_PLACES=241, PETRI_TRANSITIONS=257} [2024-06-21 20:40:04,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-21 20:40:04,698 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 257 transitions, 2738 flow [2024-06-21 20:40:04,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:04,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:04,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:04,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:40:04,698 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:04,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash -250787816, now seen corresponding path program 18 times [2024-06-21 20:40:04,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:04,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140345586] [2024-06-21 20:40:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:05,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:05,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140345586] [2024-06-21 20:40:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140345586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:05,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162304262] [2024-06-21 20:40:05,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:05,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:05,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 257 transitions, 2738 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:05,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:05,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:05,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:07,322 INFO L124 PetriNetUnfolderBase]: 3661/5917 cut-off events. [2024-06-21 20:40:07,322 INFO L125 PetriNetUnfolderBase]: For 946491/946491 co-relation queries the response was YES. [2024-06-21 20:40:07,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53103 conditions, 5917 events. 3661/5917 cut-off events. For 946491/946491 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36730 event pairs, 795 based on Foata normal form. 16/5929 useless extension candidates. Maximal degree in co-relation 52987. Up to 4063 conditions per place. [2024-06-21 20:40:07,392 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 102 changer transitions 0/305 dead transitions. [2024-06-21 20:40:07,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 305 transitions, 3978 flow [2024-06-21 20:40:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:40:07,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 20:40:07,394 INFO L175 Difference]: Start difference. First operand has 241 places, 257 transitions, 2738 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:40:07,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 305 transitions, 3978 flow [2024-06-21 20:40:08,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 305 transitions, 3739 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:08,459 INFO L231 Difference]: Finished difference. Result has 243 places, 259 transitions, 2879 flow [2024-06-21 20:40:08,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2879, PETRI_PLACES=243, PETRI_TRANSITIONS=259} [2024-06-21 20:40:08,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-21 20:40:08,460 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 259 transitions, 2879 flow [2024-06-21 20:40:08,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:08,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:08,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:08,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:40:08,460 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:08,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash -103863272, now seen corresponding path program 19 times [2024-06-21 20:40:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176189313] [2024-06-21 20:40:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:09,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176189313] [2024-06-21 20:40:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176189313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:09,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441034627] [2024-06-21 20:40:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:09,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:09,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:09,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 259 transitions, 2879 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:09,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:09,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:09,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:11,053 INFO L124 PetriNetUnfolderBase]: 3711/6013 cut-off events. [2024-06-21 20:40:11,053 INFO L125 PetriNetUnfolderBase]: For 968292/968292 co-relation queries the response was YES. [2024-06-21 20:40:11,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53452 conditions, 6013 events. 3711/6013 cut-off events. For 968292/968292 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 37632 event pairs, 847 based on Foata normal form. 20/6029 useless extension candidates. Maximal degree in co-relation 53335. Up to 5176 conditions per place. [2024-06-21 20:40:11,122 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 89 changer transitions 0/300 dead transitions. [2024-06-21 20:40:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 300 transitions, 3703 flow [2024-06-21 20:40:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:40:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 20:40:11,123 INFO L175 Difference]: Start difference. First operand has 243 places, 259 transitions, 2879 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:40:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 300 transitions, 3703 flow [2024-06-21 20:40:12,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 300 transitions, 3504 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:12,202 INFO L231 Difference]: Finished difference. Result has 247 places, 260 transitions, 2953 flow [2024-06-21 20:40:12,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=247, PETRI_TRANSITIONS=260} [2024-06-21 20:40:12,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 20:40:12,202 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 260 transitions, 2953 flow [2024-06-21 20:40:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:12,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:12,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:12,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:40:12,203 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:12,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -110297012, now seen corresponding path program 20 times [2024-06-21 20:40:12,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:12,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484120828] [2024-06-21 20:40:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:12,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:13,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:13,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484120828] [2024-06-21 20:40:13,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484120828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:13,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949646075] [2024-06-21 20:40:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:13,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:13,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:13,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:13,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 260 transitions, 2953 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:13,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:13,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:13,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:14,805 INFO L124 PetriNetUnfolderBase]: 3683/5969 cut-off events. [2024-06-21 20:40:14,805 INFO L125 PetriNetUnfolderBase]: For 907439/907439 co-relation queries the response was YES. [2024-06-21 20:40:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51565 conditions, 5969 events. 3683/5969 cut-off events. For 907439/907439 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37266 event pairs, 807 based on Foata normal form. 16/5981 useless extension candidates. Maximal degree in co-relation 51446. Up to 4782 conditions per place. [2024-06-21 20:40:14,874 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-21 20:40:14,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 303 transitions, 3711 flow [2024-06-21 20:40:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 20:40:14,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:40:14,875 INFO L175 Difference]: Start difference. First operand has 247 places, 260 transitions, 2953 flow. Second operand 10 states and 200 transitions. [2024-06-21 20:40:14,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 303 transitions, 3711 flow [2024-06-21 20:40:15,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 303 transitions, 3448 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:15,896 INFO L231 Difference]: Finished difference. Result has 249 places, 260 transitions, 2884 flow [2024-06-21 20:40:15,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2884, PETRI_PLACES=249, PETRI_TRANSITIONS=260} [2024-06-21 20:40:15,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 20:40:15,897 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 260 transitions, 2884 flow [2024-06-21 20:40:15,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:15,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:15,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:15,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:40:15,897 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:15,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -537488451, now seen corresponding path program 3 times [2024-06-21 20:40:15,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:15,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255592671] [2024-06-21 20:40:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:16,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:16,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255592671] [2024-06-21 20:40:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255592671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:16,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:16,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504489034] [2024-06-21 20:40:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:16,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 260 transitions, 2884 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:16,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:17,777 INFO L124 PetriNetUnfolderBase]: 3470/5708 cut-off events. [2024-06-21 20:40:17,778 INFO L125 PetriNetUnfolderBase]: For 853444/853449 co-relation queries the response was YES. [2024-06-21 20:40:17,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49560 conditions, 5708 events. 3470/5708 cut-off events. For 853444/853449 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36492 event pairs, 873 based on Foata normal form. 5/5639 useless extension candidates. Maximal degree in co-relation 49440. Up to 5259 conditions per place. [2024-06-21 20:40:17,844 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 229 selfloop transitions, 19 changer transitions 0/277 dead transitions. [2024-06-21 20:40:17,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 277 transitions, 3427 flow [2024-06-21 20:40:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:40:17,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:40:17,845 INFO L175 Difference]: Start difference. First operand has 249 places, 260 transitions, 2884 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:40:17,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 277 transitions, 3427 flow [2024-06-21 20:40:18,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 277 transitions, 3079 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:18,621 INFO L231 Difference]: Finished difference. Result has 246 places, 261 transitions, 2589 flow [2024-06-21 20:40:18,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2589, PETRI_PLACES=246, PETRI_TRANSITIONS=261} [2024-06-21 20:40:18,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-21 20:40:18,622 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 261 transitions, 2589 flow [2024-06-21 20:40:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:18,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:18,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:18,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:40:18,623 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:18,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1187850741, now seen corresponding path program 4 times [2024-06-21 20:40:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962574103] [2024-06-21 20:40:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:19,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:19,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962574103] [2024-06-21 20:40:19,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962574103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:19,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:19,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:40:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900816759] [2024-06-21 20:40:19,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:40:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:40:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:40:19,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:19,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 261 transitions, 2589 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:19,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:19,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:20,470 INFO L124 PetriNetUnfolderBase]: 3475/5715 cut-off events. [2024-06-21 20:40:20,470 INFO L125 PetriNetUnfolderBase]: For 865630/865635 co-relation queries the response was YES. [2024-06-21 20:40:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48679 conditions, 5715 events. 3475/5715 cut-off events. For 865630/865635 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36593 event pairs, 873 based on Foata normal form. 5/5646 useless extension candidates. Maximal degree in co-relation 48559. Up to 5257 conditions per place. [2024-06-21 20:40:20,536 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 27 changer transitions 0/277 dead transitions. [2024-06-21 20:40:20,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 277 transitions, 3181 flow [2024-06-21 20:40:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:40:20,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:20,537 INFO L175 Difference]: Start difference. First operand has 246 places, 261 transitions, 2589 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:40:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 277 transitions, 3181 flow [2024-06-21 20:40:21,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 277 transitions, 3139 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:21,229 INFO L231 Difference]: Finished difference. Result has 248 places, 264 transitions, 2677 flow [2024-06-21 20:40:21,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2677, PETRI_PLACES=248, PETRI_TRANSITIONS=264} [2024-06-21 20:40:21,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 20:40:21,229 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 264 transitions, 2677 flow [2024-06-21 20:40:21,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:21,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:21,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:21,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:40:21,229 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:21,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash -73290062, now seen corresponding path program 2 times [2024-06-21 20:40:21,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:21,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455772908] [2024-06-21 20:40:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455772908] [2024-06-21 20:40:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455772908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:22,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:22,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468564396] [2024-06-21 20:40:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:22,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:22,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 264 transitions, 2677 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:22,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:23,646 INFO L124 PetriNetUnfolderBase]: 3702/6012 cut-off events. [2024-06-21 20:40:23,647 INFO L125 PetriNetUnfolderBase]: For 899807/899812 co-relation queries the response was YES. [2024-06-21 20:40:23,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50911 conditions, 6012 events. 3702/6012 cut-off events. For 899807/899812 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37789 event pairs, 903 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 50790. Up to 5560 conditions per place. [2024-06-21 20:40:23,714 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-21 20:40:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 302 transitions, 3477 flow [2024-06-21 20:40:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 20:40:23,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:23,715 INFO L175 Difference]: Start difference. First operand has 248 places, 264 transitions, 2677 flow. Second operand 10 states and 190 transitions. [2024-06-21 20:40:23,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 302 transitions, 3477 flow [2024-06-21 20:40:24,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 302 transitions, 3369 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:24,460 INFO L231 Difference]: Finished difference. Result has 254 places, 269 transitions, 2800 flow [2024-06-21 20:40:24,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2800, PETRI_PLACES=254, PETRI_TRANSITIONS=269} [2024-06-21 20:40:24,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-21 20:40:24,461 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 269 transitions, 2800 flow [2024-06-21 20:40:24,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:24,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:24,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:24,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:40:24,461 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:24,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash -180769378, now seen corresponding path program 3 times [2024-06-21 20:40:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:24,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951177384] [2024-06-21 20:40:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951177384] [2024-06-21 20:40:25,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951177384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:25,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:25,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415545015] [2024-06-21 20:40:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:25,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 269 transitions, 2800 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:25,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:25,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:26,911 INFO L124 PetriNetUnfolderBase]: 3730/6052 cut-off events. [2024-06-21 20:40:26,911 INFO L125 PetriNetUnfolderBase]: For 924871/924876 co-relation queries the response was YES. [2024-06-21 20:40:26,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52125 conditions, 6052 events. 3730/6052 cut-off events. For 924871/924876 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38014 event pairs, 893 based on Foata normal form. 8/6058 useless extension candidates. Maximal degree in co-relation 52002. Up to 5599 conditions per place. [2024-06-21 20:40:26,978 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 59 changer transitions 0/311 dead transitions. [2024-06-21 20:40:26,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 311 transitions, 3667 flow [2024-06-21 20:40:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 20:40:26,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 20:40:26,979 INFO L175 Difference]: Start difference. First operand has 254 places, 269 transitions, 2800 flow. Second operand 10 states and 187 transitions. [2024-06-21 20:40:26,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 311 transitions, 3667 flow [2024-06-21 20:40:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 311 transitions, 3464 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:27,898 INFO L231 Difference]: Finished difference. Result has 258 places, 279 transitions, 2920 flow [2024-06-21 20:40:27,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2920, PETRI_PLACES=258, PETRI_TRANSITIONS=279} [2024-06-21 20:40:27,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-21 20:40:27,899 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 279 transitions, 2920 flow [2024-06-21 20:40:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:27,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:27,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:27,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:40:27,899 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:27,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash 77133034, now seen corresponding path program 4 times [2024-06-21 20:40:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:27,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546407274] [2024-06-21 20:40:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:27,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546407274] [2024-06-21 20:40:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546407274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:28,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:28,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118660764] [2024-06-21 20:40:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:29,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:29,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 279 transitions, 2920 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:29,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:29,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:30,502 INFO L124 PetriNetUnfolderBase]: 3747/6087 cut-off events. [2024-06-21 20:40:30,503 INFO L125 PetriNetUnfolderBase]: For 947201/947206 co-relation queries the response was YES. [2024-06-21 20:40:30,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53042 conditions, 6087 events. 3747/6087 cut-off events. For 947201/947206 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38318 event pairs, 908 based on Foata normal form. 8/6093 useless extension candidates. Maximal degree in co-relation 52917. Up to 5626 conditions per place. [2024-06-21 20:40:30,567 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 55 changer transitions 0/314 dead transitions. [2024-06-21 20:40:30,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 314 transitions, 3737 flow [2024-06-21 20:40:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:40:30,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 20:40:30,569 INFO L175 Difference]: Start difference. First operand has 258 places, 279 transitions, 2920 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:40:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 314 transitions, 3737 flow [2024-06-21 20:40:31,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 314 transitions, 3556 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:31,365 INFO L231 Difference]: Finished difference. Result has 264 places, 282 transitions, 2985 flow [2024-06-21 20:40:31,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2985, PETRI_PLACES=264, PETRI_TRANSITIONS=282} [2024-06-21 20:40:31,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 20:40:31,366 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 282 transitions, 2985 flow [2024-06-21 20:40:31,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:31,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:31,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:40:31,366 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:31,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -265710358, now seen corresponding path program 5 times [2024-06-21 20:40:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:31,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344625988] [2024-06-21 20:40:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:32,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344625988] [2024-06-21 20:40:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344625988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51336010] [2024-06-21 20:40:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:32,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:32,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 282 transitions, 2985 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:32,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:32,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:34,038 INFO L124 PetriNetUnfolderBase]: 3764/6106 cut-off events. [2024-06-21 20:40:34,038 INFO L125 PetriNetUnfolderBase]: For 966467/966472 co-relation queries the response was YES. [2024-06-21 20:40:34,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52545 conditions, 6106 events. 3764/6106 cut-off events. For 966467/966472 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38385 event pairs, 836 based on Foata normal form. 8/6112 useless extension candidates. Maximal degree in co-relation 52418. Up to 5534 conditions per place. [2024-06-21 20:40:34,109 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-21 20:40:34,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 321 transitions, 4259 flow [2024-06-21 20:40:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 20:40:34,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:34,110 INFO L175 Difference]: Start difference. First operand has 264 places, 282 transitions, 2985 flow. Second operand 10 states and 190 transitions. [2024-06-21 20:40:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 321 transitions, 4259 flow [2024-06-21 20:40:35,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 321 transitions, 4044 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:35,119 INFO L231 Difference]: Finished difference. Result has 267 places, 286 transitions, 3147 flow [2024-06-21 20:40:35,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3147, PETRI_PLACES=267, PETRI_TRANSITIONS=286} [2024-06-21 20:40:35,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-21 20:40:35,120 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 3147 flow [2024-06-21 20:40:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:40:35,120 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:35,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -561285748, now seen corresponding path program 6 times [2024-06-21 20:40:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509824104] [2024-06-21 20:40:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:36,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:36,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509824104] [2024-06-21 20:40:36,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509824104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:36,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:36,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181825346] [2024-06-21 20:40:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:36,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:36,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:36,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:36,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 286 transitions, 3147 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:36,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:36,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:36,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:37,664 INFO L124 PetriNetUnfolderBase]: 3756/6102 cut-off events. [2024-06-21 20:40:37,664 INFO L125 PetriNetUnfolderBase]: For 969798/969803 co-relation queries the response was YES. [2024-06-21 20:40:37,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52279 conditions, 6102 events. 3756/6102 cut-off events. For 969798/969803 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38418 event pairs, 906 based on Foata normal form. 8/6108 useless extension candidates. Maximal degree in co-relation 52151. Up to 5641 conditions per place. [2024-06-21 20:40:37,737 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 256 selfloop transitions, 57 changer transitions 0/318 dead transitions. [2024-06-21 20:40:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 318 transitions, 3853 flow [2024-06-21 20:40:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 20:40:37,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 20:40:37,738 INFO L175 Difference]: Start difference. First operand has 267 places, 286 transitions, 3147 flow. Second operand 10 states and 188 transitions. [2024-06-21 20:40:37,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 318 transitions, 3853 flow [2024-06-21 20:40:39,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 318 transitions, 3583 flow, removed 99 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:39,060 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 2998 flow [2024-06-21 20:40:39,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2998, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2024-06-21 20:40:39,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 20:40:39,061 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2998 flow [2024-06-21 20:40:39,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:39,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:39,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:39,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:40:39,061 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:39,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash -80647691, now seen corresponding path program 5 times [2024-06-21 20:40:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107715595] [2024-06-21 20:40:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:39,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107715595] [2024-06-21 20:40:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107715595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:39,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:39,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141408434] [2024-06-21 20:40:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:39,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:39,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:39,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:39,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2998 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:39,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:39,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:39,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:41,087 INFO L124 PetriNetUnfolderBase]: 3551/5862 cut-off events. [2024-06-21 20:40:41,088 INFO L125 PetriNetUnfolderBase]: For 967056/967064 co-relation queries the response was YES. [2024-06-21 20:40:41,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50866 conditions, 5862 events. 3551/5862 cut-off events. For 967056/967064 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37884 event pairs, 886 based on Foata normal form. 7/5792 useless extension candidates. Maximal degree in co-relation 50736. Up to 5354 conditions per place. [2024-06-21 20:40:41,164 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 44 changer transitions 0/306 dead transitions. [2024-06-21 20:40:41,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 306 transitions, 3961 flow [2024-06-21 20:40:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:40:41,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:41,166 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 2998 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:40:41,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 306 transitions, 3961 flow [2024-06-21 20:40:42,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 306 transitions, 3772 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 20:40:42,570 INFO L231 Difference]: Finished difference. Result has 266 places, 295 transitions, 3130 flow [2024-06-21 20:40:42,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3130, PETRI_PLACES=266, PETRI_TRANSITIONS=295} [2024-06-21 20:40:42,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 20:40:42,570 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 295 transitions, 3130 flow [2024-06-21 20:40:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:42,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:42,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:40:42,570 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:42,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1126008525, now seen corresponding path program 6 times [2024-06-21 20:40:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:42,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79201255] [2024-06-21 20:40:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:42,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79201255] [2024-06-21 20:40:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79201255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:43,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:43,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:43,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574931493] [2024-06-21 20:40:43,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:43,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:43,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:43,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:43,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 295 transitions, 3130 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:43,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:43,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:43,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:44,511 INFO L124 PetriNetUnfolderBase]: 3548/5868 cut-off events. [2024-06-21 20:40:44,511 INFO L125 PetriNetUnfolderBase]: For 983572/983580 co-relation queries the response was YES. [2024-06-21 20:40:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50983 conditions, 5868 events. 3548/5868 cut-off events. For 983572/983580 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38029 event pairs, 896 based on Foata normal form. 7/5798 useless extension candidates. Maximal degree in co-relation 50855. Up to 5351 conditions per place. [2024-06-21 20:40:44,582 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 44 changer transitions 0/305 dead transitions. [2024-06-21 20:40:44,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 305 transitions, 3706 flow [2024-06-21 20:40:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:40:44,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 20:40:44,583 INFO L175 Difference]: Start difference. First operand has 266 places, 295 transitions, 3130 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:40:44,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 305 transitions, 3706 flow [2024-06-21 20:40:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 305 transitions, 3538 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-21 20:40:46,162 INFO L231 Difference]: Finished difference. Result has 271 places, 295 transitions, 3056 flow [2024-06-21 20:40:46,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3056, PETRI_PLACES=271, PETRI_TRANSITIONS=295} [2024-06-21 20:40:46,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 20:40:46,163 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 295 transitions, 3056 flow [2024-06-21 20:40:46,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:46,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:46,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:40:46,163 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:46,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:46,163 INFO L85 PathProgramCache]: Analyzing trace with hash -71619561, now seen corresponding path program 2 times [2024-06-21 20:40:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:46,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392576208] [2024-06-21 20:40:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:47,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:47,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392576208] [2024-06-21 20:40:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392576208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:47,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417723785] [2024-06-21 20:40:47,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:47,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:40:47,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 295 transitions, 3056 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:47,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:47,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:40:47,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:48,344 INFO L124 PetriNetUnfolderBase]: 3411/5724 cut-off events. [2024-06-21 20:40:48,344 INFO L125 PetriNetUnfolderBase]: For 1034281/1034305 co-relation queries the response was YES. [2024-06-21 20:40:48,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50053 conditions, 5724 events. 3411/5724 cut-off events. For 1034281/1034305 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38015 event pairs, 874 based on Foata normal form. 6/5644 useless extension candidates. Maximal degree in co-relation 49923. Up to 5028 conditions per place. [2024-06-21 20:40:48,419 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 44 changer transitions 0/320 dead transitions. [2024-06-21 20:40:48,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 320 transitions, 4182 flow [2024-06-21 20:40:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:40:48,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:40:48,420 INFO L175 Difference]: Start difference. First operand has 271 places, 295 transitions, 3056 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:40:48,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 320 transitions, 4182 flow [2024-06-21 20:40:49,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 320 transitions, 4062 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:49,676 INFO L231 Difference]: Finished difference. Result has 273 places, 304 transitions, 3204 flow [2024-06-21 20:40:49,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3204, PETRI_PLACES=273, PETRI_TRANSITIONS=304} [2024-06-21 20:40:49,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 20:40:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 304 transitions, 3204 flow [2024-06-21 20:40:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:49,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:49,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:40:49,677 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash -71114571, now seen corresponding path program 3 times [2024-06-21 20:40:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433797016] [2024-06-21 20:40:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433797016] [2024-06-21 20:40:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433797016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:50,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:50,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:50,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453902243] [2024-06-21 20:40:50,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:50,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:50,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:50,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:51,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:40:51,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 3204 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:51,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:51,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:40:51,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:52,276 INFO L124 PetriNetUnfolderBase]: 3395/5716 cut-off events. [2024-06-21 20:40:52,277 INFO L125 PetriNetUnfolderBase]: For 1038801/1038837 co-relation queries the response was YES. [2024-06-21 20:40:52,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50323 conditions, 5716 events. 3395/5716 cut-off events. For 1038801/1038837 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37979 event pairs, 871 based on Foata normal form. 4/5636 useless extension candidates. Maximal degree in co-relation 50193. Up to 5094 conditions per place. [2024-06-21 20:40:52,341 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 245 selfloop transitions, 17 changer transitions 0/321 dead transitions. [2024-06-21 20:40:52,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 321 transitions, 3839 flow [2024-06-21 20:40:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:40:52,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:40:52,342 INFO L175 Difference]: Start difference. First operand has 273 places, 304 transitions, 3204 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:40:52,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 321 transitions, 3839 flow [2024-06-21 20:40:53,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 321 transitions, 3748 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:40:53,402 INFO L231 Difference]: Finished difference. Result has 279 places, 310 transitions, 3252 flow [2024-06-21 20:40:53,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3252, PETRI_PLACES=279, PETRI_TRANSITIONS=310} [2024-06-21 20:40:53,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 20:40:53,402 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 310 transitions, 3252 flow [2024-06-21 20:40:53,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:53,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:53,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:53,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:40:53,402 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:53,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -86351691, now seen corresponding path program 4 times [2024-06-21 20:40:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:53,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367335410] [2024-06-21 20:40:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367335410] [2024-06-21 20:40:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367335410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:54,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38573604] [2024-06-21 20:40:54,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:54,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:40:54,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 310 transitions, 3252 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:54,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:54,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:40:54,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:55,648 INFO L124 PetriNetUnfolderBase]: 3398/5709 cut-off events. [2024-06-21 20:40:55,648 INFO L125 PetriNetUnfolderBase]: For 1058074/1058106 co-relation queries the response was YES. [2024-06-21 20:40:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50375 conditions, 5709 events. 3398/5709 cut-off events. For 1058074/1058106 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37961 event pairs, 877 based on Foata normal form. 8/5631 useless extension candidates. Maximal degree in co-relation 50242. Up to 5072 conditions per place. [2024-06-21 20:40:55,717 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 238 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-21 20:40:55,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 325 transitions, 3874 flow [2024-06-21 20:40:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:40:55,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:55,719 INFO L175 Difference]: Start difference. First operand has 279 places, 310 transitions, 3252 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:40:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 325 transitions, 3874 flow [2024-06-21 20:40:57,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 325 transitions, 3796 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:40:57,051 INFO L231 Difference]: Finished difference. Result has 283 places, 313 transitions, 3298 flow [2024-06-21 20:40:57,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3298, PETRI_PLACES=283, PETRI_TRANSITIONS=313} [2024-06-21 20:40:57,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 20:40:57,052 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 313 transitions, 3298 flow [2024-06-21 20:40:57,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:57,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:57,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:57,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:40:57,055 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:57,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1182144757, now seen corresponding path program 1 times [2024-06-21 20:40:57,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:57,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900446581] [2024-06-21 20:40:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:57,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:57,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900446581] [2024-06-21 20:40:57,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900446581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:57,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:57,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:57,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324574452] [2024-06-21 20:40:57,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:57,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:57,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 313 transitions, 3298 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:57,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:57,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:57,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:59,142 INFO L124 PetriNetUnfolderBase]: 3675/6080 cut-off events. [2024-06-21 20:40:59,142 INFO L125 PetriNetUnfolderBase]: For 1076424/1076428 co-relation queries the response was YES. [2024-06-21 20:40:59,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52961 conditions, 6080 events. 3675/6080 cut-off events. For 1076424/1076428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39408 event pairs, 896 based on Foata normal form. 6/6077 useless extension candidates. Maximal degree in co-relation 52826. Up to 5634 conditions per place. [2024-06-21 20:40:59,221 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 310 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-21 20:40:59,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 337 transitions, 4070 flow [2024-06-21 20:40:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:40:59,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:59,222 INFO L175 Difference]: Start difference. First operand has 283 places, 313 transitions, 3298 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:40:59,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 337 transitions, 4070 flow [2024-06-21 20:41:00,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 337 transitions, 3978 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:00,888 INFO L231 Difference]: Finished difference. Result has 285 places, 316 transitions, 3316 flow [2024-06-21 20:41:00,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=285, PETRI_TRANSITIONS=316} [2024-06-21 20:41:00,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 20:41:00,889 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 316 transitions, 3316 flow [2024-06-21 20:41:00,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:00,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:00,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:00,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:41:00,889 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:00,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1187656867, now seen corresponding path program 2 times [2024-06-21 20:41:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599764957] [2024-06-21 20:41:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:01,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:01,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599764957] [2024-06-21 20:41:01,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599764957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:01,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:01,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:01,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139156046] [2024-06-21 20:41:01,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:01,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:01,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:01,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:01,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 316 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:01,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:01,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:01,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:03,031 INFO L124 PetriNetUnfolderBase]: 3685/6096 cut-off events. [2024-06-21 20:41:03,031 INFO L125 PetriNetUnfolderBase]: For 1096553/1096557 co-relation queries the response was YES. [2024-06-21 20:41:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53649 conditions, 6096 events. 3685/6096 cut-off events. For 1096553/1096557 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39497 event pairs, 896 based on Foata normal form. 6/6093 useless extension candidates. Maximal degree in co-relation 53513. Up to 5639 conditions per place. [2024-06-21 20:41:03,108 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 22 changer transitions 0/338 dead transitions. [2024-06-21 20:41:03,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 338 transitions, 4092 flow [2024-06-21 20:41:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:41:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:41:03,110 INFO L175 Difference]: Start difference. First operand has 285 places, 316 transitions, 3316 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:41:03,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 338 transitions, 4092 flow [2024-06-21 20:41:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 338 transitions, 4004 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:04,815 INFO L231 Difference]: Finished difference. Result has 287 places, 319 transitions, 3354 flow [2024-06-21 20:41:04,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3354, PETRI_PLACES=287, PETRI_TRANSITIONS=319} [2024-06-21 20:41:04,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-21 20:41:04,816 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 319 transitions, 3354 flow [2024-06-21 20:41:04,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:04,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:04,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:04,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:41:04,816 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:04,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash -524349628, now seen corresponding path program 1 times [2024-06-21 20:41:04,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:04,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679191119] [2024-06-21 20:41:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:04,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:05,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:05,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679191119] [2024-06-21 20:41:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679191119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:05,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:05,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071250018] [2024-06-21 20:41:05,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:05,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:05,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 319 transitions, 3354 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:05,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:05,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:05,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:07,012 INFO L124 PetriNetUnfolderBase]: 3690/6105 cut-off events. [2024-06-21 20:41:07,012 INFO L125 PetriNetUnfolderBase]: For 1118362/1118366 co-relation queries the response was YES. [2024-06-21 20:41:07,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54312 conditions, 6105 events. 3690/6105 cut-off events. For 1118362/1118366 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39536 event pairs, 895 based on Foata normal form. 6/6102 useless extension candidates. Maximal degree in co-relation 54175. Up to 5664 conditions per place. [2024-06-21 20:41:07,093 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 17 changer transitions 0/339 dead transitions. [2024-06-21 20:41:07,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 339 transitions, 4128 flow [2024-06-21 20:41:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:41:07,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:41:07,094 INFO L175 Difference]: Start difference. First operand has 287 places, 319 transitions, 3354 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:41:07,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 339 transitions, 4128 flow [2024-06-21 20:41:08,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 339 transitions, 4024 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:08,697 INFO L231 Difference]: Finished difference. Result has 289 places, 322 transitions, 3370 flow [2024-06-21 20:41:08,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3370, PETRI_PLACES=289, PETRI_TRANSITIONS=322} [2024-06-21 20:41:08,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-21 20:41:08,697 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 322 transitions, 3370 flow [2024-06-21 20:41:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:08,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:08,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:41:08,698 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:08,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:08,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1187858677, now seen corresponding path program 3 times [2024-06-21 20:41:08,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:08,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440654495] [2024-06-21 20:41:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:08,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:09,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440654495] [2024-06-21 20:41:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440654495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:09,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:09,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432361076] [2024-06-21 20:41:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:09,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:09,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 322 transitions, 3370 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:09,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:09,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:10,945 INFO L124 PetriNetUnfolderBase]: 3700/6121 cut-off events. [2024-06-21 20:41:10,946 INFO L125 PetriNetUnfolderBase]: For 1137767/1137771 co-relation queries the response was YES. [2024-06-21 20:41:11,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54820 conditions, 6121 events. 3700/6121 cut-off events. For 1137767/1137771 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39673 event pairs, 895 based on Foata normal form. 6/6118 useless extension candidates. Maximal degree in co-relation 54682. Up to 5648 conditions per place. [2024-06-21 20:41:11,032 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 302 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-06-21 20:41:11,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 341 transitions, 4152 flow [2024-06-21 20:41:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:41:11,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:41:11,033 INFO L175 Difference]: Start difference. First operand has 289 places, 322 transitions, 3370 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:41:11,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 341 transitions, 4152 flow [2024-06-21 20:41:12,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 341 transitions, 4054 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:12,896 INFO L231 Difference]: Finished difference. Result has 291 places, 325 transitions, 3420 flow [2024-06-21 20:41:12,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3420, PETRI_PLACES=291, PETRI_TRANSITIONS=325} [2024-06-21 20:41:12,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-21 20:41:12,896 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 325 transitions, 3420 flow [2024-06-21 20:41:12,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:12,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:12,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:41:12,897 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:12,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1187858894, now seen corresponding path program 2 times [2024-06-21 20:41:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972069079] [2024-06-21 20:41:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972069079] [2024-06-21 20:41:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972069079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161888238] [2024-06-21 20:41:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:13,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:13,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 325 transitions, 3420 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:13,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:13,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:13,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:15,139 INFO L124 PetriNetUnfolderBase]: 3708/6133 cut-off events. [2024-06-21 20:41:15,139 INFO L125 PetriNetUnfolderBase]: For 1168338/1168343 co-relation queries the response was YES. [2024-06-21 20:41:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55602 conditions, 6133 events. 3708/6133 cut-off events. For 1168338/1168343 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39779 event pairs, 895 based on Foata normal form. 7/6129 useless extension candidates. Maximal degree in co-relation 55463. Up to 5681 conditions per place. [2024-06-21 20:41:15,210 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 22 changer transitions 0/343 dead transitions. [2024-06-21 20:41:15,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 343 transitions, 4212 flow [2024-06-21 20:41:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:41:15,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:41:15,211 INFO L175 Difference]: Start difference. First operand has 291 places, 325 transitions, 3420 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:41:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 343 transitions, 4212 flow [2024-06-21 20:41:16,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 343 transitions, 4086 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:16,855 INFO L231 Difference]: Finished difference. Result has 293 places, 328 transitions, 3432 flow [2024-06-21 20:41:16,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3432, PETRI_PLACES=293, PETRI_TRANSITIONS=328} [2024-06-21 20:41:16,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 20:41:16,855 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 328 transitions, 3432 flow [2024-06-21 20:41:16,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:16,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:16,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:16,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:41:16,856 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:16,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash -524140378, now seen corresponding path program 3 times [2024-06-21 20:41:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338240918] [2024-06-21 20:41:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338240918] [2024-06-21 20:41:17,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338240918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:17,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:17,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:17,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071236866] [2024-06-21 20:41:17,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:17,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:17,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:17,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:17,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:17,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 328 transitions, 3432 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:17,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:17,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:17,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:19,121 INFO L124 PetriNetUnfolderBase]: 3713/6140 cut-off events. [2024-06-21 20:41:19,121 INFO L125 PetriNetUnfolderBase]: For 1181994/1181999 co-relation queries the response was YES. [2024-06-21 20:41:19,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56012 conditions, 6140 events. 3713/6140 cut-off events. For 1181994/1181999 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39834 event pairs, 895 based on Foata normal form. 7/6137 useless extension candidates. Maximal degree in co-relation 55872. Up to 5682 conditions per place. [2024-06-21 20:41:19,201 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 29 changer transitions 0/350 dead transitions. [2024-06-21 20:41:19,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 350 transitions, 4332 flow [2024-06-21 20:41:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:41:19,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:41:19,202 INFO L175 Difference]: Start difference. First operand has 293 places, 328 transitions, 3432 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:41:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 350 transitions, 4332 flow [2024-06-21 20:41:21,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 350 transitions, 4154 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:21,072 INFO L231 Difference]: Finished difference. Result has 296 places, 336 transitions, 3529 flow [2024-06-21 20:41:21,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3529, PETRI_PLACES=296, PETRI_TRANSITIONS=336} [2024-06-21 20:41:21,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-21 20:41:21,073 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 336 transitions, 3529 flow [2024-06-21 20:41:21,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:21,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:21,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:41:21,073 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1111082242, now seen corresponding path program 4 times [2024-06-21 20:41:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87648038] [2024-06-21 20:41:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87648038] [2024-06-21 20:41:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87648038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:22,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:22,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:22,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772875445] [2024-06-21 20:41:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:22,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:22,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 336 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:22,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:22,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:23,446 INFO L124 PetriNetUnfolderBase]: 3718/6149 cut-off events. [2024-06-21 20:41:23,446 INFO L125 PetriNetUnfolderBase]: For 1205693/1205706 co-relation queries the response was YES. [2024-06-21 20:41:23,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56496 conditions, 6149 events. 3718/6149 cut-off events. For 1205693/1205706 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39910 event pairs, 903 based on Foata normal form. 8/6145 useless extension candidates. Maximal degree in co-relation 56354. Up to 5659 conditions per place. [2024-06-21 20:41:23,528 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 297 selfloop transitions, 50 changer transitions 0/357 dead transitions. [2024-06-21 20:41:23,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 357 transitions, 4669 flow [2024-06-21 20:41:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:41:23,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:41:23,529 INFO L175 Difference]: Start difference. First operand has 296 places, 336 transitions, 3529 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:41:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 357 transitions, 4669 flow [2024-06-21 20:41:25,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 357 transitions, 4561 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:25,628 INFO L231 Difference]: Finished difference. Result has 301 places, 345 transitions, 3748 flow [2024-06-21 20:41:25,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3748, PETRI_PLACES=301, PETRI_TRANSITIONS=345} [2024-06-21 20:41:25,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-21 20:41:25,628 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 345 transitions, 3748 flow [2024-06-21 20:41:25,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:25,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:25,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:25,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:41:25,629 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:25,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -80632098, now seen corresponding path program 5 times [2024-06-21 20:41:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:25,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537204922] [2024-06-21 20:41:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:26,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537204922] [2024-06-21 20:41:26,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537204922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:26,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:26,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798568825] [2024-06-21 20:41:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:26,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:26,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 345 transitions, 3748 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:26,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:26,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:28,015 INFO L124 PetriNetUnfolderBase]: 3725/6160 cut-off events. [2024-06-21 20:41:28,015 INFO L125 PetriNetUnfolderBase]: For 1230211/1230224 co-relation queries the response was YES. [2024-06-21 20:41:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57145 conditions, 6160 events. 3725/6160 cut-off events. For 1230211/1230224 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39973 event pairs, 903 based on Foata normal form. 8/6157 useless extension candidates. Maximal degree in co-relation 57000. Up to 5690 conditions per place. [2024-06-21 20:41:28,091 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 316 selfloop transitions, 34 changer transitions 0/360 dead transitions. [2024-06-21 20:41:28,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 360 transitions, 4788 flow [2024-06-21 20:41:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:41:28,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:41:28,092 INFO L175 Difference]: Start difference. First operand has 301 places, 345 transitions, 3748 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:41:28,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 360 transitions, 4788 flow [2024-06-21 20:41:30,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 360 transitions, 4650 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:30,146 INFO L231 Difference]: Finished difference. Result has 306 places, 348 transitions, 3782 flow [2024-06-21 20:41:30,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3782, PETRI_PLACES=306, PETRI_TRANSITIONS=348} [2024-06-21 20:41:30,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 20:41:30,146 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 348 transitions, 3782 flow [2024-06-21 20:41:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:30,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:30,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:41:30,147 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:30,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -80639755, now seen corresponding path program 4 times [2024-06-21 20:41:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:30,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53785838] [2024-06-21 20:41:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:31,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53785838] [2024-06-21 20:41:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53785838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:31,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:31,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:31,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732261209] [2024-06-21 20:41:31,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:31,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:31,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:31,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:31,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 348 transitions, 3782 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:31,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:31,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:31,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:32,528 INFO L124 PetriNetUnfolderBase]: 3727/6165 cut-off events. [2024-06-21 20:41:32,528 INFO L125 PetriNetUnfolderBase]: For 1245803/1245816 co-relation queries the response was YES. [2024-06-21 20:41:32,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57170 conditions, 6165 events. 3727/6165 cut-off events. For 1245803/1245816 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40002 event pairs, 907 based on Foata normal form. 7/6161 useless extension candidates. Maximal degree in co-relation 57023. Up to 5671 conditions per place. [2024-06-21 20:41:32,612 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 38 changer transitions 0/364 dead transitions. [2024-06-21 20:41:32,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 364 transitions, 4614 flow [2024-06-21 20:41:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:41:32,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:41:32,613 INFO L175 Difference]: Start difference. First operand has 306 places, 348 transitions, 3782 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:41:32,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 364 transitions, 4614 flow [2024-06-21 20:41:34,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 364 transitions, 4424 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 20:41:34,728 INFO L231 Difference]: Finished difference. Result has 307 places, 351 transitions, 3770 flow [2024-06-21 20:41:34,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=307, PETRI_TRANSITIONS=351} [2024-06-21 20:41:34,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 20:41:34,729 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 351 transitions, 3770 flow [2024-06-21 20:41:34,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:34,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:34,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:41:34,729 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -80639538, now seen corresponding path program 6 times [2024-06-21 20:41:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806250892] [2024-06-21 20:41:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:35,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:35,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806250892] [2024-06-21 20:41:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806250892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:35,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:35,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:35,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799248638] [2024-06-21 20:41:35,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:35,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:35,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 351 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:35,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:35,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:35,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:37,107 INFO L124 PetriNetUnfolderBase]: 3726/6164 cut-off events. [2024-06-21 20:41:37,107 INFO L125 PetriNetUnfolderBase]: For 1262529/1262542 co-relation queries the response was YES. [2024-06-21 20:41:37,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57494 conditions, 6164 events. 3726/6164 cut-off events. For 1262529/1262542 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40016 event pairs, 902 based on Foata normal form. 10/6163 useless extension candidates. Maximal degree in co-relation 57347. Up to 5698 conditions per place. [2024-06-21 20:41:37,195 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 324 selfloop transitions, 31 changer transitions 0/365 dead transitions. [2024-06-21 20:41:37,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 365 transitions, 4604 flow [2024-06-21 20:41:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:41:37,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 20:41:37,196 INFO L175 Difference]: Start difference. First operand has 307 places, 351 transitions, 3770 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:41:37,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 365 transitions, 4604 flow [2024-06-21 20:41:39,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 365 transitions, 4376 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:39,422 INFO L231 Difference]: Finished difference. Result has 309 places, 354 transitions, 3716 flow [2024-06-21 20:41:39,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=309, PETRI_TRANSITIONS=354} [2024-06-21 20:41:39,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 20:41:39,423 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 354 transitions, 3716 flow [2024-06-21 20:41:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:39,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:39,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:41:39,423 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:39,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash -71096715, now seen corresponding path program 1 times [2024-06-21 20:41:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105950658] [2024-06-21 20:41:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:41,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:41,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105950658] [2024-06-21 20:41:41,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105950658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:41,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:41,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:41,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929721924] [2024-06-21 20:41:41,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:41,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:41,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:41,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:41:41,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 354 transitions, 3716 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:41,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:41,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:41:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:42,374 INFO L124 PetriNetUnfolderBase]: 3492/5853 cut-off events. [2024-06-21 20:41:42,374 INFO L125 PetriNetUnfolderBase]: For 1255998/1256028 co-relation queries the response was YES. [2024-06-21 20:41:42,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55735 conditions, 5853 events. 3492/5853 cut-off events. For 1255998/1256028 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38696 event pairs, 872 based on Foata normal form. 6/5776 useless extension candidates. Maximal degree in co-relation 55587. Up to 5179 conditions per place. [2024-06-21 20:41:42,459 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 283 selfloop transitions, 19 changer transitions 0/369 dead transitions. [2024-06-21 20:41:42,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 369 transitions, 4422 flow [2024-06-21 20:41:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:41:42,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:41:42,460 INFO L175 Difference]: Start difference. First operand has 309 places, 354 transitions, 3716 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:41:42,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 369 transitions, 4422 flow [2024-06-21 20:41:44,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 369 transitions, 4276 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:44,470 INFO L231 Difference]: Finished difference. Result has 312 places, 356 transitions, 3689 flow [2024-06-21 20:41:44,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3689, PETRI_PLACES=312, PETRI_TRANSITIONS=356} [2024-06-21 20:41:44,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 20:41:44,470 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 356 transitions, 3689 flow [2024-06-21 20:41:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:44,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:44,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:44,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:41:44,471 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:44,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 38513199, now seen corresponding path program 1 times [2024-06-21 20:41:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364188231] [2024-06-21 20:41:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:45,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364188231] [2024-06-21 20:41:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364188231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:45,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:45,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219829383] [2024-06-21 20:41:45,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:45,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:45,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:45,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 356 transitions, 3689 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:45,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:45,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:45,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:46,796 INFO L124 PetriNetUnfolderBase]: 3735/6149 cut-off events. [2024-06-21 20:41:46,796 INFO L125 PetriNetUnfolderBase]: For 1279686/1279686 co-relation queries the response was YES. [2024-06-21 20:41:46,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58155 conditions, 6149 events. 3735/6149 cut-off events. For 1279686/1279686 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39809 event pairs, 887 based on Foata normal form. 2/6076 useless extension candidates. Maximal degree in co-relation 58006. Up to 5587 conditions per place. [2024-06-21 20:41:46,882 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 22 changer transitions 0/394 dead transitions. [2024-06-21 20:41:46,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 394 transitions, 4646 flow [2024-06-21 20:41:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:41:46,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:41:46,883 INFO L175 Difference]: Start difference. First operand has 312 places, 356 transitions, 3689 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:41:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 394 transitions, 4646 flow [2024-06-21 20:41:49,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 394 transitions, 4511 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 20:41:49,628 INFO L231 Difference]: Finished difference. Result has 316 places, 369 transitions, 3806 flow [2024-06-21 20:41:49,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3806, PETRI_PLACES=316, PETRI_TRANSITIONS=369} [2024-06-21 20:41:49,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 20:41:49,628 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 369 transitions, 3806 flow [2024-06-21 20:41:49,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:49,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:49,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:41:49,629 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:49,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -725141793, now seen corresponding path program 2 times [2024-06-21 20:41:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:49,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326639128] [2024-06-21 20:41:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:50,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:50,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326639128] [2024-06-21 20:41:50,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326639128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:50,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:50,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:50,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684504963] [2024-06-21 20:41:50,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:50,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:50,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 369 transitions, 3806 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:50,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:50,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:50,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:51,873 INFO L124 PetriNetUnfolderBase]: 3799/6255 cut-off events. [2024-06-21 20:41:51,874 INFO L125 PetriNetUnfolderBase]: For 1304019/1304023 co-relation queries the response was YES. [2024-06-21 20:41:51,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 6255 events. 3799/6255 cut-off events. For 1304019/1304023 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40608 event pairs, 979 based on Foata normal form. 6/6188 useless extension candidates. Maximal degree in co-relation 59035. Up to 5661 conditions per place. [2024-06-21 20:41:51,962 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 35 changer transitions 0/416 dead transitions. [2024-06-21 20:41:51,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 416 transitions, 4903 flow [2024-06-21 20:41:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:41:51,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:41:51,963 INFO L175 Difference]: Start difference. First operand has 316 places, 369 transitions, 3806 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:41:51,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 416 transitions, 4903 flow [2024-06-21 20:41:54,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 416 transitions, 4769 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 20:41:54,133 INFO L231 Difference]: Finished difference. Result has 325 places, 385 transitions, 4040 flow [2024-06-21 20:41:54,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4040, PETRI_PLACES=325, PETRI_TRANSITIONS=385} [2024-06-21 20:41:54,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 20:41:54,133 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 385 transitions, 4040 flow [2024-06-21 20:41:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:54,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:54,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:41:54,133 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:54,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1570149547, now seen corresponding path program 3 times [2024-06-21 20:41:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905749644] [2024-06-21 20:41:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905749644] [2024-06-21 20:41:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905749644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389227516] [2024-06-21 20:41:54,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:55,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 385 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:55,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:55,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:55,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:56,494 INFO L124 PetriNetUnfolderBase]: 3884/6392 cut-off events. [2024-06-21 20:41:56,494 INFO L125 PetriNetUnfolderBase]: For 1322963/1322965 co-relation queries the response was YES. [2024-06-21 20:41:56,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60679 conditions, 6392 events. 3884/6392 cut-off events. For 1322963/1322965 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41500 event pairs, 893 based on Foata normal form. 4/6323 useless extension candidates. Maximal degree in co-relation 60523. Up to 5764 conditions per place. [2024-06-21 20:41:56,597 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 49 changer transitions 0/438 dead transitions. [2024-06-21 20:41:56,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 438 transitions, 5317 flow [2024-06-21 20:41:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:41:56,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:41:56,598 INFO L175 Difference]: Start difference. First operand has 325 places, 385 transitions, 4040 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:41:56,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 438 transitions, 5317 flow [2024-06-21 20:41:59,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 438 transitions, 5133 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:59,231 INFO L231 Difference]: Finished difference. Result has 332 places, 410 transitions, 4429 flow [2024-06-21 20:41:59,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4429, PETRI_PLACES=332, PETRI_TRANSITIONS=410} [2024-06-21 20:41:59,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 20:41:59,231 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 410 transitions, 4429 flow [2024-06-21 20:41:59,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:59,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:59,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:41:59,231 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:59,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -818376145, now seen corresponding path program 4 times [2024-06-21 20:41:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624919423] [2024-06-21 20:41:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:59,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:00,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:00,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624919423] [2024-06-21 20:42:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624919423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:00,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847353031] [2024-06-21 20:42:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:00,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:00,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:00,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 410 transitions, 4429 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:00,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:00,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:00,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:01,613 INFO L124 PetriNetUnfolderBase]: 3897/6416 cut-off events. [2024-06-21 20:42:01,613 INFO L125 PetriNetUnfolderBase]: For 1347640/1347642 co-relation queries the response was YES. [2024-06-21 20:42:01,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61460 conditions, 6416 events. 3897/6416 cut-off events. For 1347640/1347642 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41767 event pairs, 1199 based on Foata normal form. 4/6343 useless extension candidates. Maximal degree in co-relation 61300. Up to 5836 conditions per place. [2024-06-21 20:42:01,720 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 43 changer transitions 0/440 dead transitions. [2024-06-21 20:42:01,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 440 transitions, 5406 flow [2024-06-21 20:42:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:42:01,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:42:01,721 INFO L175 Difference]: Start difference. First operand has 332 places, 410 transitions, 4429 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:42:01,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 440 transitions, 5406 flow [2024-06-21 20:42:04,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 440 transitions, 5311 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:42:04,539 INFO L231 Difference]: Finished difference. Result has 339 places, 415 transitions, 4534 flow [2024-06-21 20:42:04,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4534, PETRI_PLACES=339, PETRI_TRANSITIONS=415} [2024-06-21 20:42:04,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-21 20:42:04,539 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 415 transitions, 4534 flow [2024-06-21 20:42:04,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:04,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:04,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:42:04,540 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:04,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 899401059, now seen corresponding path program 5 times [2024-06-21 20:42:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:04,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990122890] [2024-06-21 20:42:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990122890] [2024-06-21 20:42:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990122890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:05,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:05,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592832250] [2024-06-21 20:42:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:05,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:05,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 415 transitions, 4534 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:05,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:05,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:05,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:06,807 INFO L124 PetriNetUnfolderBase]: 3962/6517 cut-off events. [2024-06-21 20:42:06,807 INFO L125 PetriNetUnfolderBase]: For 1369978/1369980 co-relation queries the response was YES. [2024-06-21 20:42:06,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62322 conditions, 6517 events. 3962/6517 cut-off events. For 1369978/1369980 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42294 event pairs, 1010 based on Foata normal form. 4/6474 useless extension candidates. Maximal degree in co-relation 62160. Up to 5775 conditions per place. [2024-06-21 20:42:06,900 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 65 changer transitions 0/460 dead transitions. [2024-06-21 20:42:06,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 460 transitions, 5683 flow [2024-06-21 20:42:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:42:06,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:42:06,902 INFO L175 Difference]: Start difference. First operand has 339 places, 415 transitions, 4534 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:42:06,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 460 transitions, 5683 flow [2024-06-21 20:42:09,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 460 transitions, 5536 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:09,203 INFO L231 Difference]: Finished difference. Result has 343 places, 430 transitions, 4779 flow [2024-06-21 20:42:09,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4779, PETRI_PLACES=343, PETRI_TRANSITIONS=430} [2024-06-21 20:42:09,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 20:42:09,204 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 430 transitions, 4779 flow [2024-06-21 20:42:09,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:09,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:09,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:42:09,204 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:09,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1670562097, now seen corresponding path program 1 times [2024-06-21 20:42:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:09,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551923743] [2024-06-21 20:42:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:09,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551923743] [2024-06-21 20:42:09,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551923743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:09,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:09,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:09,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336662947] [2024-06-21 20:42:09,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:10,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:10,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 430 transitions, 4779 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:10,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:10,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:10,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:11,731 INFO L124 PetriNetUnfolderBase]: 3984/6556 cut-off events. [2024-06-21 20:42:11,731 INFO L125 PetriNetUnfolderBase]: For 1395490/1395493 co-relation queries the response was YES. [2024-06-21 20:42:11,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63304 conditions, 6556 events. 3984/6556 cut-off events. For 1395490/1395493 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42848 event pairs, 1206 based on Foata normal form. 4/6484 useless extension candidates. Maximal degree in co-relation 63140. Up to 5944 conditions per place. [2024-06-21 20:42:11,820 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 384 selfloop transitions, 51 changer transitions 0/472 dead transitions. [2024-06-21 20:42:11,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 472 transitions, 5925 flow [2024-06-21 20:42:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 20:42:11,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 20:42:11,821 INFO L175 Difference]: Start difference. First operand has 343 places, 430 transitions, 4779 flow. Second operand 11 states and 210 transitions. [2024-06-21 20:42:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 472 transitions, 5925 flow [2024-06-21 20:42:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 472 transitions, 5742 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:14,155 INFO L231 Difference]: Finished difference. Result has 348 places, 440 transitions, 4885 flow [2024-06-21 20:42:14,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4885, PETRI_PLACES=348, PETRI_TRANSITIONS=440} [2024-06-21 20:42:14,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-21 20:42:14,156 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 440 transitions, 4885 flow [2024-06-21 20:42:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:14,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:14,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:14,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:42:14,156 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:14,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:14,156 INFO L85 PathProgramCache]: Analyzing trace with hash 583889201, now seen corresponding path program 2 times [2024-06-21 20:42:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:14,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672919338] [2024-06-21 20:42:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:14,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:14,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672919338] [2024-06-21 20:42:14,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672919338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:14,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:14,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494655793] [2024-06-21 20:42:14,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:15,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:15,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 440 transitions, 4885 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:15,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:15,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:15,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:16,702 INFO L124 PetriNetUnfolderBase]: 3997/6574 cut-off events. [2024-06-21 20:42:16,703 INFO L125 PetriNetUnfolderBase]: For 1427181/1427184 co-relation queries the response was YES. [2024-06-21 20:42:16,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64337 conditions, 6574 events. 3997/6574 cut-off events. For 1427181/1427184 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42982 event pairs, 1203 based on Foata normal form. 4/6502 useless extension candidates. Maximal degree in co-relation 64172. Up to 5948 conditions per place. [2024-06-21 20:42:16,798 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 381 selfloop transitions, 60 changer transitions 0/478 dead transitions. [2024-06-21 20:42:16,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 478 transitions, 6329 flow [2024-06-21 20:42:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 20:42:16,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 20:42:16,799 INFO L175 Difference]: Start difference. First operand has 348 places, 440 transitions, 4885 flow. Second operand 11 states and 211 transitions. [2024-06-21 20:42:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 478 transitions, 6329 flow [2024-06-21 20:42:19,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 478 transitions, 6133 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:19,647 INFO L231 Difference]: Finished difference. Result has 352 places, 446 transitions, 5033 flow [2024-06-21 20:42:19,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5033, PETRI_PLACES=352, PETRI_TRANSITIONS=446} [2024-06-21 20:42:19,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-21 20:42:19,647 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 446 transitions, 5033 flow [2024-06-21 20:42:19,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:19,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:19,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:19,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:42:19,648 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1559674027, now seen corresponding path program 6 times [2024-06-21 20:42:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247818125] [2024-06-21 20:42:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:20,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247818125] [2024-06-21 20:42:20,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247818125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:20,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:20,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:20,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200373925] [2024-06-21 20:42:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:20,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:20,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:20,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 446 transitions, 5033 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:20,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:22,156 INFO L124 PetriNetUnfolderBase]: 4024/6610 cut-off events. [2024-06-21 20:42:22,156 INFO L125 PetriNetUnfolderBase]: For 1454958/1454960 co-relation queries the response was YES. [2024-06-21 20:42:22,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65191 conditions, 6610 events. 4024/6610 cut-off events. For 1454958/1454960 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43053 event pairs, 928 based on Foata normal form. 4/6541 useless extension candidates. Maximal degree in co-relation 65025. Up to 6017 conditions per place. [2024-06-21 20:42:22,256 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 47 changer transitions 0/479 dead transitions. [2024-06-21 20:42:22,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 479 transitions, 6148 flow [2024-06-21 20:42:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:42:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:42:22,258 INFO L175 Difference]: Start difference. First operand has 352 places, 446 transitions, 5033 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:42:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 479 transitions, 6148 flow [2024-06-21 20:42:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 479 transitions, 5965 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:25,380 INFO L231 Difference]: Finished difference. Result has 355 places, 456 transitions, 5134 flow [2024-06-21 20:42:25,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5134, PETRI_PLACES=355, PETRI_TRANSITIONS=456} [2024-06-21 20:42:25,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 20:42:25,380 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 456 transitions, 5134 flow [2024-06-21 20:42:25,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:25,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:25,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:25,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:42:25,380 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:25,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2080408967, now seen corresponding path program 7 times [2024-06-21 20:42:25,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:25,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141574544] [2024-06-21 20:42:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:26,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:26,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141574544] [2024-06-21 20:42:26,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141574544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:26,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:26,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:26,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344449886] [2024-06-21 20:42:26,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:26,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:26,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:26,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 456 transitions, 5134 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:26,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:26,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:26,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:28,059 INFO L124 PetriNetUnfolderBase]: 4042/6631 cut-off events. [2024-06-21 20:42:28,059 INFO L125 PetriNetUnfolderBase]: For 1478293/1478293 co-relation queries the response was YES. [2024-06-21 20:42:28,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65812 conditions, 6631 events. 4042/6631 cut-off events. For 1478293/1478293 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43078 event pairs, 930 based on Foata normal form. 2/6560 useless extension candidates. Maximal degree in co-relation 65643. Up to 6036 conditions per place. [2024-06-21 20:42:28,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 52 changer transitions 0/484 dead transitions. [2024-06-21 20:42:28,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 484 transitions, 6252 flow [2024-06-21 20:42:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:42:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:42:28,166 INFO L175 Difference]: Start difference. First operand has 355 places, 456 transitions, 5134 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:42:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 484 transitions, 6252 flow [2024-06-21 20:42:31,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 484 transitions, 6095 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:31,501 INFO L231 Difference]: Finished difference. Result has 360 places, 464 transitions, 5281 flow [2024-06-21 20:42:31,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5281, PETRI_PLACES=360, PETRI_TRANSITIONS=464} [2024-06-21 20:42:31,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-21 20:42:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 464 transitions, 5281 flow [2024-06-21 20:42:31,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:31,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:31,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:42:31,502 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 220033031, now seen corresponding path program 3 times [2024-06-21 20:42:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615765291] [2024-06-21 20:42:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615765291] [2024-06-21 20:42:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615765291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:32,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:32,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:32,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417608659] [2024-06-21 20:42:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:32,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:32,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:32,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:32,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 464 transitions, 5281 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:32,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:32,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:32,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:34,012 INFO L124 PetriNetUnfolderBase]: 4082/6694 cut-off events. [2024-06-21 20:42:34,012 INFO L125 PetriNetUnfolderBase]: For 1501146/1501148 co-relation queries the response was YES. [2024-06-21 20:42:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66593 conditions, 6694 events. 4082/6694 cut-off events. For 1501146/1501148 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43601 event pairs, 930 based on Foata normal form. 4/6625 useless extension candidates. Maximal degree in co-relation 66421. Up to 6092 conditions per place. [2024-06-21 20:42:34,120 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 55 changer transitions 0/507 dead transitions. [2024-06-21 20:42:34,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 507 transitions, 6637 flow [2024-06-21 20:42:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:42:34,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:42:34,121 INFO L175 Difference]: Start difference. First operand has 360 places, 464 transitions, 5281 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:42:34,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 507 transitions, 6637 flow [2024-06-21 20:42:37,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 507 transitions, 6457 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 20:42:37,454 INFO L231 Difference]: Finished difference. Result has 365 places, 482 transitions, 5602 flow [2024-06-21 20:42:37,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5602, PETRI_PLACES=365, PETRI_TRANSITIONS=482} [2024-06-21 20:42:37,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 20:42:37,454 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 482 transitions, 5602 flow [2024-06-21 20:42:37,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:37,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:42:37,455 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:37,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1559671051, now seen corresponding path program 4 times [2024-06-21 20:42:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74024123] [2024-06-21 20:42:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74024123] [2024-06-21 20:42:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74024123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:38,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339092766] [2024-06-21 20:42:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:38,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:38,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 482 transitions, 5602 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:38,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:38,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:39,968 INFO L124 PetriNetUnfolderBase]: 4092/6708 cut-off events. [2024-06-21 20:42:39,968 INFO L125 PetriNetUnfolderBase]: For 1518965/1518967 co-relation queries the response was YES. [2024-06-21 20:42:40,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67281 conditions, 6708 events. 4092/6708 cut-off events. For 1518965/1518967 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43654 event pairs, 929 based on Foata normal form. 3/6638 useless extension candidates. Maximal degree in co-relation 67107. Up to 6092 conditions per place. [2024-06-21 20:42:40,079 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 67 changer transitions 0/514 dead transitions. [2024-06-21 20:42:40,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 514 transitions, 6782 flow [2024-06-21 20:42:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:42:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:42:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 20:42:40,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 20:42:40,080 INFO L175 Difference]: Start difference. First operand has 365 places, 482 transitions, 5602 flow. Second operand 10 states and 192 transitions. [2024-06-21 20:42:40,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 514 transitions, 6782 flow [2024-06-21 20:42:43,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 514 transitions, 6522 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:43,827 INFO L231 Difference]: Finished difference. Result has 369 places, 488 transitions, 5635 flow [2024-06-21 20:42:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5635, PETRI_PLACES=369, PETRI_TRANSITIONS=488} [2024-06-21 20:42:43,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 20:42:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 488 transitions, 5635 flow [2024-06-21 20:42:43,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:43,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:43,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:43,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:42:43,828 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:43,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1641073257, now seen corresponding path program 5 times [2024-06-21 20:42:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877428337] [2024-06-21 20:42:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:44,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877428337] [2024-06-21 20:42:44,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877428337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:44,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316118506] [2024-06-21 20:42:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:44,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:44,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:44,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:44,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 488 transitions, 5635 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:44,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:44,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:44,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:46,554 INFO L124 PetriNetUnfolderBase]: 4147/6794 cut-off events. [2024-06-21 20:42:46,554 INFO L125 PetriNetUnfolderBase]: For 1545166/1545169 co-relation queries the response was YES. [2024-06-21 20:42:46,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68390 conditions, 6794 events. 4147/6794 cut-off events. For 1545166/1545169 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44250 event pairs, 933 based on Foata normal form. 3/6723 useless extension candidates. Maximal degree in co-relation 68215. Up to 6088 conditions per place. [2024-06-21 20:42:46,665 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 84 changer transitions 0/536 dead transitions. [2024-06-21 20:42:46,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 536 transitions, 7062 flow [2024-06-21 20:42:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:42:46,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 20:42:46,666 INFO L175 Difference]: Start difference. First operand has 369 places, 488 transitions, 5635 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:42:46,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 536 transitions, 7062 flow [2024-06-21 20:42:49,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 536 transitions, 6826 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 20:42:49,875 INFO L231 Difference]: Finished difference. Result has 372 places, 509 transitions, 5942 flow [2024-06-21 20:42:49,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5942, PETRI_PLACES=372, PETRI_TRANSITIONS=509} [2024-06-21 20:42:49,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 20:42:49,876 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 509 transitions, 5942 flow [2024-06-21 20:42:49,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:49,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:49,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:49,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:42:49,876 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:49,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1641424983, now seen corresponding path program 1 times [2024-06-21 20:42:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:49,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874967470] [2024-06-21 20:42:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:50,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:50,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874967470] [2024-06-21 20:42:50,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874967470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:50,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:50,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463967825] [2024-06-21 20:42:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:50,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:50,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 509 transitions, 5942 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:50,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:50,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:52,631 INFO L124 PetriNetUnfolderBase]: 4388/7129 cut-off events. [2024-06-21 20:42:52,631 INFO L125 PetriNetUnfolderBase]: For 1579037/1579042 co-relation queries the response was YES. [2024-06-21 20:42:52,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71244 conditions, 7129 events. 4388/7129 cut-off events. For 1579037/1579042 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 45857 event pairs, 1330 based on Foata normal form. 5/7131 useless extension candidates. Maximal degree in co-relation 71066. Up to 6641 conditions per place. [2024-06-21 20:42:52,740 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 490 selfloop transitions, 58 changer transitions 0/553 dead transitions. [2024-06-21 20:42:52,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 553 transitions, 7431 flow [2024-06-21 20:42:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:42:52,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:42:52,741 INFO L175 Difference]: Start difference. First operand has 372 places, 509 transitions, 5942 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:42:52,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 553 transitions, 7431 flow [2024-06-21 20:42:56,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 553 transitions, 7219 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 20:42:56,521 INFO L231 Difference]: Finished difference. Result has 379 places, 528 transitions, 6173 flow [2024-06-21 20:42:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6173, PETRI_PLACES=379, PETRI_TRANSITIONS=528} [2024-06-21 20:42:56,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 20:42:56,521 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 528 transitions, 6173 flow [2024-06-21 20:42:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:56,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:56,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:42:56,522 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:56,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1451640205, now seen corresponding path program 2 times [2024-06-21 20:42:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:56,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352287705] [2024-06-21 20:42:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:57,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352287705] [2024-06-21 20:42:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352287705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:57,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:57,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14223808] [2024-06-21 20:42:57,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:57,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:57,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 528 transitions, 6173 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:57,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:57,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:57,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:59,343 INFO L124 PetriNetUnfolderBase]: 4398/7143 cut-off events. [2024-06-21 20:42:59,343 INFO L125 PetriNetUnfolderBase]: For 1606254/1606259 co-relation queries the response was YES. [2024-06-21 20:42:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72102 conditions, 7143 events. 4398/7143 cut-off events. For 1606254/1606259 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45954 event pairs, 1330 based on Foata normal form. 5/7145 useless extension candidates. Maximal degree in co-relation 71922. Up to 6649 conditions per place. [2024-06-21 20:42:59,452 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 488 selfloop transitions, 63 changer transitions 0/556 dead transitions. [2024-06-21 20:42:59,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 556 transitions, 7524 flow [2024-06-21 20:42:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:42:59,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:42:59,453 INFO L175 Difference]: Start difference. First operand has 379 places, 528 transitions, 6173 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:42:59,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 556 transitions, 7524 flow [2024-06-21 20:43:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 556 transitions, 7270 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:02,741 INFO L231 Difference]: Finished difference. Result has 383 places, 534 transitions, 6226 flow [2024-06-21 20:43:02,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5919, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6226, PETRI_PLACES=383, PETRI_TRANSITIONS=534} [2024-06-21 20:43:02,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 20:43:02,742 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 534 transitions, 6226 flow [2024-06-21 20:43:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:02,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:02,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:43:02,742 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:02,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1451639957, now seen corresponding path program 1 times [2024-06-21 20:43:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:02,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713090406] [2024-06-21 20:43:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:02,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:03,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:03,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713090406] [2024-06-21 20:43:03,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713090406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:03,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:03,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:03,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038035553] [2024-06-21 20:43:03,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:03,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:03,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:03,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:03,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:03,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 534 transitions, 6226 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:03,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:03,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:03,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:05,391 INFO L124 PetriNetUnfolderBase]: 4198/6882 cut-off events. [2024-06-21 20:43:05,391 INFO L125 PetriNetUnfolderBase]: For 1637071/1637077 co-relation queries the response was YES. [2024-06-21 20:43:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70901 conditions, 6882 events. 4198/6882 cut-off events. For 1637071/1637077 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 45013 event pairs, 1247 based on Foata normal form. 6/6811 useless extension candidates. Maximal degree in co-relation 70721. Up to 6262 conditions per place. [2024-06-21 20:43:05,497 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 475 selfloop transitions, 41 changer transitions 0/559 dead transitions. [2024-06-21 20:43:05,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 559 transitions, 7426 flow [2024-06-21 20:43:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:43:05,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:43:05,498 INFO L175 Difference]: Start difference. First operand has 383 places, 534 transitions, 6226 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:43:05,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 559 transitions, 7426 flow [2024-06-21 20:43:09,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 559 transitions, 7190 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:09,170 INFO L231 Difference]: Finished difference. Result has 386 places, 537 transitions, 6158 flow [2024-06-21 20:43:09,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6158, PETRI_PLACES=386, PETRI_TRANSITIONS=537} [2024-06-21 20:43:09,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-21 20:43:09,170 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 537 transitions, 6158 flow [2024-06-21 20:43:09,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:09,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:09,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:09,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:43:09,171 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:09,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:09,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1451640391, now seen corresponding path program 6 times [2024-06-21 20:43:09,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:09,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044436710] [2024-06-21 20:43:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:09,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:09,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044436710] [2024-06-21 20:43:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044436710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:09,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:09,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916248506] [2024-06-21 20:43:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:10,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:10,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 537 transitions, 6158 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:10,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:10,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:10,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:11,810 INFO L124 PetriNetUnfolderBase]: 4204/6876 cut-off events. [2024-06-21 20:43:11,810 INFO L125 PetriNetUnfolderBase]: For 1650625/1650628 co-relation queries the response was YES. [2024-06-21 20:43:11,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71409 conditions, 6876 events. 4204/6876 cut-off events. For 1650625/1650628 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 44715 event pairs, 931 based on Foata normal form. 3/6805 useless extension candidates. Maximal degree in co-relation 71228. Up to 6135 conditions per place. [2024-06-21 20:43:11,929 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 417 selfloop transitions, 102 changer transitions 0/562 dead transitions. [2024-06-21 20:43:11,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 562 transitions, 7430 flow [2024-06-21 20:43:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:43:11,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:43:11,930 INFO L175 Difference]: Start difference. First operand has 386 places, 537 transitions, 6158 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:43:11,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 562 transitions, 7430 flow [2024-06-21 20:43:15,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 562 transitions, 7310 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:15,428 INFO L231 Difference]: Finished difference. Result has 390 places, 540 transitions, 6394 flow [2024-06-21 20:43:15,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6038, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6394, PETRI_PLACES=390, PETRI_TRANSITIONS=540} [2024-06-21 20:43:15,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-21 20:43:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 540 transitions, 6394 flow [2024-06-21 20:43:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:15,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:15,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:15,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:43:15,429 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:15,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2103701166, now seen corresponding path program 1 times [2024-06-21 20:43:15,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:15,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961904776] [2024-06-21 20:43:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:16,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961904776] [2024-06-21 20:43:16,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961904776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:16,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:43:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327661517] [2024-06-21 20:43:16,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:43:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:43:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:43:16,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:16,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 540 transitions, 6394 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:16,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:16,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:19,018 INFO L124 PetriNetUnfolderBase]: 5086/8271 cut-off events. [2024-06-21 20:43:19,018 INFO L125 PetriNetUnfolderBase]: For 1765981/1765984 co-relation queries the response was YES. [2024-06-21 20:43:19,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80370 conditions, 8271 events. 5086/8271 cut-off events. For 1765981/1765984 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55189 event pairs, 931 based on Foata normal form. 12/8280 useless extension candidates. Maximal degree in co-relation 80188. Up to 6471 conditions per place. [2024-06-21 20:43:19,159 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 463 selfloop transitions, 240 changer transitions 0/708 dead transitions. [2024-06-21 20:43:19,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 708 transitions, 9171 flow [2024-06-21 20:43:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-21 20:43:19,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 20:43:19,160 INFO L175 Difference]: Start difference. First operand has 390 places, 540 transitions, 6394 flow. Second operand 12 states and 242 transitions. [2024-06-21 20:43:19,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 708 transitions, 9171 flow [2024-06-21 20:43:23,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 708 transitions, 8837 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:23,497 INFO L231 Difference]: Finished difference. Result has 399 places, 638 transitions, 7596 flow [2024-06-21 20:43:23,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7596, PETRI_PLACES=399, PETRI_TRANSITIONS=638} [2024-06-21 20:43:23,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 20:43:23,497 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 638 transitions, 7596 flow [2024-06-21 20:43:23,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:23,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:23,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:43:23,498 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:23,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1215585001, now seen corresponding path program 7 times [2024-06-21 20:43:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676816312] [2024-06-21 20:43:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676816312] [2024-06-21 20:43:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676816312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:24,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:24,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:24,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998922635] [2024-06-21 20:43:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:24,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 638 transitions, 7596 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:24,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:26,523 INFO L124 PetriNetUnfolderBase]: 4856/7997 cut-off events. [2024-06-21 20:43:26,524 INFO L125 PetriNetUnfolderBase]: For 1757513/1757519 co-relation queries the response was YES. [2024-06-21 20:43:26,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80881 conditions, 7997 events. 4856/7997 cut-off events. For 1757513/1757519 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54505 event pairs, 1000 based on Foata normal form. 7/7931 useless extension candidates. Maximal degree in co-relation 80694. Up to 7249 conditions per place. [2024-06-21 20:43:26,667 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 561 selfloop transitions, 53 changer transitions 0/660 dead transitions. [2024-06-21 20:43:26,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 660 transitions, 9048 flow [2024-06-21 20:43:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:43:26,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:43:26,668 INFO L175 Difference]: Start difference. First operand has 399 places, 638 transitions, 7596 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:43:26,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 660 transitions, 9048 flow [2024-06-21 20:43:31,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 660 transitions, 8730 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:31,755 INFO L231 Difference]: Finished difference. Result has 404 places, 641 transitions, 7546 flow [2024-06-21 20:43:31,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7282, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7546, PETRI_PLACES=404, PETRI_TRANSITIONS=641} [2024-06-21 20:43:31,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-21 20:43:31,756 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 641 transitions, 7546 flow [2024-06-21 20:43:31,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:31,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:31,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:43:31,756 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:31,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1215465031, now seen corresponding path program 8 times [2024-06-21 20:43:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:31,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652799684] [2024-06-21 20:43:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652799684] [2024-06-21 20:43:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652799684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:32,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:32,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:32,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557944082] [2024-06-21 20:43:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:32,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:32,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:32,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:32,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 641 transitions, 7546 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:32,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:32,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:32,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:35,022 INFO L124 PetriNetUnfolderBase]: 4886/8045 cut-off events. [2024-06-21 20:43:35,023 INFO L125 PetriNetUnfolderBase]: For 1765661/1765665 co-relation queries the response was YES. [2024-06-21 20:43:35,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80823 conditions, 8045 events. 4886/8045 cut-off events. For 1765661/1765665 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 54634 event pairs, 987 based on Foata normal form. 4/7975 useless extension candidates. Maximal degree in co-relation 80635. Up to 7108 conditions per place. [2024-06-21 20:43:35,143 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 494 selfloop transitions, 136 changer transitions 0/676 dead transitions. [2024-06-21 20:43:35,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 676 transitions, 9519 flow [2024-06-21 20:43:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:43:35,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:43:35,144 INFO L175 Difference]: Start difference. First operand has 404 places, 641 transitions, 7546 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:43:35,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 676 transitions, 9519 flow [2024-06-21 20:43:39,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 676 transitions, 9277 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:39,139 INFO L231 Difference]: Finished difference. Result has 408 places, 654 transitions, 8043 flow [2024-06-21 20:43:39,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8043, PETRI_PLACES=408, PETRI_TRANSITIONS=654} [2024-06-21 20:43:39,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-21 20:43:39,139 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 654 transitions, 8043 flow [2024-06-21 20:43:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:39,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:39,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:43:39,139 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:39,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1215167927, now seen corresponding path program 2 times [2024-06-21 20:43:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:39,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119142348] [2024-06-21 20:43:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:40,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119142348] [2024-06-21 20:43:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119142348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:40,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:40,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328367059] [2024-06-21 20:43:40,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:40,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:40,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:40,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 654 transitions, 8043 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:40,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:40,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:40,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:42,322 INFO L124 PetriNetUnfolderBase]: 4903/8079 cut-off events. [2024-06-21 20:43:42,322 INFO L125 PetriNetUnfolderBase]: For 1825033/1825042 co-relation queries the response was YES. [2024-06-21 20:43:42,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82066 conditions, 8079 events. 4903/8079 cut-off events. For 1825033/1825042 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55085 event pairs, 1316 based on Foata normal form. 9/8011 useless extension candidates. Maximal degree in co-relation 81875. Up to 7298 conditions per place. [2024-06-21 20:43:42,474 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 580 selfloop transitions, 58 changer transitions 0/684 dead transitions. [2024-06-21 20:43:42,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 684 transitions, 9861 flow [2024-06-21 20:43:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:43:42,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:43:42,475 INFO L175 Difference]: Start difference. First operand has 408 places, 654 transitions, 8043 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:43:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 684 transitions, 9861 flow [2024-06-21 20:43:46,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 684 transitions, 9606 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:46,986 INFO L231 Difference]: Finished difference. Result has 415 places, 664 transitions, 8162 flow [2024-06-21 20:43:46,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8162, PETRI_PLACES=415, PETRI_TRANSITIONS=664} [2024-06-21 20:43:46,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-21 20:43:46,987 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 664 transitions, 8162 flow [2024-06-21 20:43:46,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:46,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:46,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:43:46,988 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:46,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1877607101, now seen corresponding path program 3 times [2024-06-21 20:43:46,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:46,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119108860] [2024-06-21 20:43:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119108860] [2024-06-21 20:43:47,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119108860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:47,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:47,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4039471] [2024-06-21 20:43:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:48,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:48,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 664 transitions, 8162 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:48,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:48,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:50,064 INFO L124 PetriNetUnfolderBase]: 4908/8087 cut-off events. [2024-06-21 20:43:50,064 INFO L125 PetriNetUnfolderBase]: For 1843587/1843596 co-relation queries the response was YES. [2024-06-21 20:43:50,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82286 conditions, 8087 events. 4908/8087 cut-off events. For 1843587/1843596 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 55157 event pairs, 1316 based on Foata normal form. 9/8019 useless extension candidates. Maximal degree in co-relation 82091. Up to 7319 conditions per place. [2024-06-21 20:43:50,200 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 589 selfloop transitions, 51 changer transitions 0/686 dead transitions. [2024-06-21 20:43:50,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 686 transitions, 9609 flow [2024-06-21 20:43:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:43:50,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:43:50,201 INFO L175 Difference]: Start difference. First operand has 415 places, 664 transitions, 8162 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:43:50,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 686 transitions, 9609 flow [2024-06-21 20:43:55,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 686 transitions, 9447 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:55,395 INFO L231 Difference]: Finished difference. Result has 420 places, 667 transitions, 8207 flow [2024-06-21 20:43:55,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=420, PETRI_TRANSITIONS=667} [2024-06-21 20:43:55,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-21 20:43:55,395 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 667 transitions, 8207 flow [2024-06-21 20:43:55,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:55,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:55,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:55,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:43:55,396 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:55,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1686209161, now seen corresponding path program 3 times [2024-06-21 20:43:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:55,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936144603] [2024-06-21 20:43:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:55,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936144603] [2024-06-21 20:43:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936144603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:56,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:56,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027011468] [2024-06-21 20:43:56,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:56,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:56,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:56,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 667 transitions, 8207 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:56,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:56,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:56,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:58,780 INFO L124 PetriNetUnfolderBase]: 5155/8424 cut-off events. [2024-06-21 20:43:58,780 INFO L125 PetriNetUnfolderBase]: For 1867862/1867867 co-relation queries the response was YES. [2024-06-21 20:43:58,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84773 conditions, 8424 events. 5155/8424 cut-off events. For 1867862/1867867 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 56613 event pairs, 1402 based on Foata normal form. 5/8426 useless extension candidates. Maximal degree in co-relation 84576. Up to 7778 conditions per place. [2024-06-21 20:43:58,913 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 612 selfloop transitions, 76 changer transitions 0/693 dead transitions. [2024-06-21 20:43:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 693 transitions, 10207 flow [2024-06-21 20:43:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:43:58,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:43:58,914 INFO L175 Difference]: Start difference. First operand has 420 places, 667 transitions, 8207 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:43:58,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 693 transitions, 10207 flow [2024-06-21 20:44:03,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 693 transitions, 10035 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:03,521 INFO L231 Difference]: Finished difference. Result has 422 places, 673 transitions, 8483 flow [2024-06-21 20:44:03,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8483, PETRI_PLACES=422, PETRI_TRANSITIONS=673} [2024-06-21 20:44:03,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-21 20:44:03,521 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 673 transitions, 8483 flow [2024-06-21 20:44:03,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:03,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:03,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:03,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:44:03,522 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:03,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1215157015, now seen corresponding path program 1 times [2024-06-21 20:44:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:03,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919935353] [2024-06-21 20:44:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919935353] [2024-06-21 20:44:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919935353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:05,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:05,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796590959] [2024-06-21 20:44:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:05,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:05,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 673 transitions, 8483 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:05,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:05,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:05,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:07,711 INFO L124 PetriNetUnfolderBase]: 4699/7805 cut-off events. [2024-06-21 20:44:07,711 INFO L125 PetriNetUnfolderBase]: For 1931120/1931179 co-relation queries the response was YES. [2024-06-21 20:44:07,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81132 conditions, 7805 events. 4699/7805 cut-off events. For 1931120/1931179 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 53964 event pairs, 954 based on Foata normal form. 17/7728 useless extension candidates. Maximal degree in co-relation 80934. Up to 6840 conditions per place. [2024-06-21 20:44:07,849 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 540 selfloop transitions, 60 changer transitions 0/702 dead transitions. [2024-06-21 20:44:07,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 702 transitions, 9862 flow [2024-06-21 20:44:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 20:44:07,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 20:44:07,850 INFO L175 Difference]: Start difference. First operand has 422 places, 673 transitions, 8483 flow. Second operand 10 states and 191 transitions. [2024-06-21 20:44:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 702 transitions, 9862 flow [2024-06-21 20:44:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 702 transitions, 9645 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:13,114 INFO L231 Difference]: Finished difference. Result has 429 places, 682 transitions, 8528 flow [2024-06-21 20:44:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8528, PETRI_PLACES=429, PETRI_TRANSITIONS=682} [2024-06-21 20:44:13,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-21 20:44:13,115 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 682 transitions, 8528 flow [2024-06-21 20:44:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:13,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:13,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:44:13,115 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:13,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -777370969, now seen corresponding path program 8 times [2024-06-21 20:44:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541811917] [2024-06-21 20:44:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541811917] [2024-06-21 20:44:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541811917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:14,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:14,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381801240] [2024-06-21 20:44:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:14,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:14,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 682 transitions, 8528 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:14,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:14,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:16,566 INFO L124 PetriNetUnfolderBase]: 4957/8142 cut-off events. [2024-06-21 20:44:16,566 INFO L125 PetriNetUnfolderBase]: For 1951283/1951291 co-relation queries the response was YES. [2024-06-21 20:44:16,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 8142 events. 4957/8142 cut-off events. For 1951283/1951291 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 55479 event pairs, 1301 based on Foata normal form. 10/8075 useless extension candidates. Maximal degree in co-relation 84013. Up to 7371 conditions per place. [2024-06-21 20:44:16,714 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 605 selfloop transitions, 55 changer transitions 0/708 dead transitions. [2024-06-21 20:44:16,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 708 transitions, 10085 flow [2024-06-21 20:44:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:44:16,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:44:16,715 INFO L175 Difference]: Start difference. First operand has 429 places, 682 transitions, 8528 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:44:16,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 708 transitions, 10085 flow [2024-06-21 20:44:22,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 708 transitions, 9934 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:22,335 INFO L231 Difference]: Finished difference. Result has 432 places, 687 transitions, 8676 flow [2024-06-21 20:44:22,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8377, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8676, PETRI_PLACES=432, PETRI_TRANSITIONS=687} [2024-06-21 20:44:22,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-21 20:44:22,336 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 687 transitions, 8676 flow [2024-06-21 20:44:22,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:22,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:22,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:44:22,336 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:22,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -433284919, now seen corresponding path program 9 times [2024-06-21 20:44:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:22,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328522285] [2024-06-21 20:44:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:23,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328522285] [2024-06-21 20:44:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328522285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:23,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285549999] [2024-06-21 20:44:23,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:23,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:23,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 687 transitions, 8676 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:23,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:23,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:23,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:25,505 INFO L124 PetriNetUnfolderBase]: 4965/8143 cut-off events. [2024-06-21 20:44:25,505 INFO L125 PetriNetUnfolderBase]: For 1981052/1981058 co-relation queries the response was YES. [2024-06-21 20:44:25,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84793 conditions, 8143 events. 4965/8143 cut-off events. For 1981052/1981058 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 55357 event pairs, 993 based on Foata normal form. 8/8078 useless extension candidates. Maximal degree in co-relation 84589. Up to 7381 conditions per place. [2024-06-21 20:44:25,654 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 598 selfloop transitions, 59 changer transitions 0/705 dead transitions. [2024-06-21 20:44:25,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 705 transitions, 10164 flow [2024-06-21 20:44:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:44:25,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:44:25,655 INFO L175 Difference]: Start difference. First operand has 432 places, 687 transitions, 8676 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:44:25,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 705 transitions, 10164 flow [2024-06-21 20:44:29,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 705 transitions, 9968 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:29,939 INFO L231 Difference]: Finished difference. Result has 435 places, 689 transitions, 8720 flow [2024-06-21 20:44:29,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8480, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8720, PETRI_PLACES=435, PETRI_TRANSITIONS=689} [2024-06-21 20:44:29,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-21 20:44:29,940 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 689 transitions, 8720 flow [2024-06-21 20:44:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:29,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:29,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:44:29,940 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1219658223, now seen corresponding path program 9 times [2024-06-21 20:44:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656658991] [2024-06-21 20:44:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:30,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656658991] [2024-06-21 20:44:30,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656658991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:30,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:30,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566087455] [2024-06-21 20:44:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:30,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:30,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 689 transitions, 8720 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:30,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:30,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:30,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:32,952 INFO L124 PetriNetUnfolderBase]: 4966/8155 cut-off events. [2024-06-21 20:44:32,953 INFO L125 PetriNetUnfolderBase]: For 2009045/2009057 co-relation queries the response was YES. [2024-06-21 20:44:33,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84878 conditions, 8155 events. 4966/8155 cut-off events. For 2009045/2009057 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 55586 event pairs, 1295 based on Foata normal form. 14/8093 useless extension candidates. Maximal degree in co-relation 84673. Up to 7366 conditions per place. [2024-06-21 20:44:33,100 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 596 selfloop transitions, 71 changer transitions 0/715 dead transitions. [2024-06-21 20:44:33,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 715 transitions, 10322 flow [2024-06-21 20:44:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:44:33,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:44:33,101 INFO L175 Difference]: Start difference. First operand has 435 places, 689 transitions, 8720 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:44:33,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 715 transitions, 10322 flow [2024-06-21 20:44:38,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 715 transitions, 9983 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:38,024 INFO L231 Difference]: Finished difference. Result has 436 places, 692 transitions, 8715 flow [2024-06-21 20:44:38,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8381, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8715, PETRI_PLACES=436, PETRI_TRANSITIONS=692} [2024-06-21 20:44:38,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-21 20:44:38,025 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 692 transitions, 8715 flow [2024-06-21 20:44:38,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:38,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:38,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:38,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:44:38,025 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:38,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -777367993, now seen corresponding path program 10 times [2024-06-21 20:44:38,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:38,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680062418] [2024-06-21 20:44:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:38,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680062418] [2024-06-21 20:44:38,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680062418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:38,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:38,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681670298] [2024-06-21 20:44:38,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:39,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:39,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 692 transitions, 8715 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:39,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:39,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:39,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:41,570 INFO L124 PetriNetUnfolderBase]: 4971/8162 cut-off events. [2024-06-21 20:44:41,570 INFO L125 PetriNetUnfolderBase]: For 2029947/2029959 co-relation queries the response was YES. [2024-06-21 20:44:41,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85430 conditions, 8162 events. 4971/8162 cut-off events. For 2029947/2029959 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55633 event pairs, 1290 based on Foata normal form. 13/8099 useless extension candidates. Maximal degree in co-relation 85226. Up to 7345 conditions per place. [2024-06-21 20:44:41,727 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 576 selfloop transitions, 95 changer transitions 0/719 dead transitions. [2024-06-21 20:44:41,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 719 transitions, 10333 flow [2024-06-21 20:44:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:44:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:44:41,728 INFO L175 Difference]: Start difference. First operand has 436 places, 692 transitions, 8715 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:44:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 719 transitions, 10333 flow [2024-06-21 20:44:46,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 719 transitions, 10071 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:46,947 INFO L231 Difference]: Finished difference. Result has 439 places, 695 transitions, 8833 flow [2024-06-21 20:44:46,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8453, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8833, PETRI_PLACES=439, PETRI_TRANSITIONS=695} [2024-06-21 20:44:46,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 20:44:46,948 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 695 transitions, 8833 flow [2024-06-21 20:44:46,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:46,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:46,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:46,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:44:46,948 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:46,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -669695383, now seen corresponding path program 11 times [2024-06-21 20:44:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560963509] [2024-06-21 20:44:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:47,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:47,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560963509] [2024-06-21 20:44:47,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560963509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:47,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:47,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:47,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340905848] [2024-06-21 20:44:47,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:47,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:47,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:47,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:47,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:47,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 695 transitions, 8833 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:47,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:47,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:47,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:50,074 INFO L124 PetriNetUnfolderBase]: 4983/8179 cut-off events. [2024-06-21 20:44:50,074 INFO L125 PetriNetUnfolderBase]: For 2058707/2058714 co-relation queries the response was YES. [2024-06-21 20:44:50,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86420 conditions, 8179 events. 4983/8179 cut-off events. For 2058707/2058714 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 55576 event pairs, 983 based on Foata normal form. 8/8113 useless extension candidates. Maximal degree in co-relation 86215. Up to 7315 conditions per place. [2024-06-21 20:44:50,218 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 588 selfloop transitions, 88 changer transitions 0/724 dead transitions. [2024-06-21 20:44:50,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 724 transitions, 10637 flow [2024-06-21 20:44:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:44:50,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:44:50,219 INFO L175 Difference]: Start difference. First operand has 439 places, 695 transitions, 8833 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:44:50,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 724 transitions, 10637 flow [2024-06-21 20:44:55,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 724 transitions, 10305 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:55,644 INFO L231 Difference]: Finished difference. Result has 439 places, 701 transitions, 9022 flow [2024-06-21 20:44:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8501, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9022, PETRI_PLACES=439, PETRI_TRANSITIONS=701} [2024-06-21 20:44:55,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 20:44:55,645 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 701 transitions, 9022 flow [2024-06-21 20:44:55,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:55,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:55,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:44:55,645 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:55,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash -441442507, now seen corresponding path program 4 times [2024-06-21 20:44:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:55,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540868337] [2024-06-21 20:44:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:56,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:56,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540868337] [2024-06-21 20:44:56,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540868337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:56,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:56,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:56,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434429564] [2024-06-21 20:44:56,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:56,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:56,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:56,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:56,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:56,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 701 transitions, 9022 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:56,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:56,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:56,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:59,219 INFO L124 PetriNetUnfolderBase]: 5247/8559 cut-off events. [2024-06-21 20:44:59,219 INFO L125 PetriNetUnfolderBase]: For 2054528/2054534 co-relation queries the response was YES. [2024-06-21 20:44:59,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89137 conditions, 8559 events. 5247/8559 cut-off events. For 2054528/2054534 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 57525 event pairs, 1419 based on Foata normal form. 6/8560 useless extension candidates. Maximal degree in co-relation 88932. Up to 7931 conditions per place. [2024-06-21 20:44:59,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 662 selfloop transitions, 68 changer transitions 0/735 dead transitions. [2024-06-21 20:44:59,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 735 transitions, 10983 flow [2024-06-21 20:44:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:44:59,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 20:44:59,358 INFO L175 Difference]: Start difference. First operand has 439 places, 701 transitions, 9022 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:44:59,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 735 transitions, 10983 flow [2024-06-21 20:45:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 735 transitions, 10533 flow, removed 140 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:05,839 INFO L231 Difference]: Finished difference. Result has 443 places, 716 transitions, 9169 flow [2024-06-21 20:45:05,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9169, PETRI_PLACES=443, PETRI_TRANSITIONS=716} [2024-06-21 20:45:05,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-21 20:45:05,840 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 716 transitions, 9169 flow [2024-06-21 20:45:05,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:05,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:05,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:45:05,841 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:05,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -669337147, now seen corresponding path program 5 times [2024-06-21 20:45:05,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:05,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091641175] [2024-06-21 20:45:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:06,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:06,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091641175] [2024-06-21 20:45:06,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091641175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:06,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:06,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:06,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092582190] [2024-06-21 20:45:06,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:06,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:06,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:06,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:06,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 716 transitions, 9169 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:06,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:09,143 INFO L124 PetriNetUnfolderBase]: 5267/8587 cut-off events. [2024-06-21 20:45:09,143 INFO L125 PetriNetUnfolderBase]: For 2083565/2083571 co-relation queries the response was YES. [2024-06-21 20:45:09,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89765 conditions, 8587 events. 5267/8587 cut-off events. For 2083565/2083571 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57710 event pairs, 1416 based on Foata normal form. 6/8588 useless extension candidates. Maximal degree in co-relation 89558. Up to 7941 conditions per place. [2024-06-21 20:45:09,303 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 657 selfloop transitions, 83 changer transitions 0/745 dead transitions. [2024-06-21 20:45:09,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 745 transitions, 11104 flow [2024-06-21 20:45:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:45:09,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 20:45:09,304 INFO L175 Difference]: Start difference. First operand has 443 places, 716 transitions, 9169 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:45:09,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 745 transitions, 11104 flow [2024-06-21 20:45:15,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 745 transitions, 10725 flow, removed 130 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:15,103 INFO L231 Difference]: Finished difference. Result has 447 places, 728 transitions, 9394 flow [2024-06-21 20:45:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9394, PETRI_PLACES=447, PETRI_TRANSITIONS=728} [2024-06-21 20:45:15,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-21 20:45:15,104 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 728 transitions, 9394 flow [2024-06-21 20:45:15,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:15,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:15,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:15,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:45:15,104 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:15,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash -669336899, now seen corresponding path program 4 times [2024-06-21 20:45:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:15,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578730888] [2024-06-21 20:45:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578730888] [2024-06-21 20:45:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578730888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:16,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:16,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191197957] [2024-06-21 20:45:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:16,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:16,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 728 transitions, 9394 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:16,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:16,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:16,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:18,701 INFO L124 PetriNetUnfolderBase]: 5040/8272 cut-off events. [2024-06-21 20:45:18,701 INFO L125 PetriNetUnfolderBase]: For 2135356/2135367 co-relation queries the response was YES. [2024-06-21 20:45:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88340 conditions, 8272 events. 5040/8272 cut-off events. For 2135356/2135367 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 56415 event pairs, 1322 based on Foata normal form. 12/8207 useless extension candidates. Maximal degree in co-relation 88131. Up to 7486 conditions per place. [2024-06-21 20:45:18,845 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 641 selfloop transitions, 57 changer transitions 0/753 dead transitions. [2024-06-21 20:45:18,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 753 transitions, 11066 flow [2024-06-21 20:45:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:45:18,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 20:45:18,846 INFO L175 Difference]: Start difference. First operand has 447 places, 728 transitions, 9394 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:45:18,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 753 transitions, 11066 flow [2024-06-21 20:45:23,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 753 transitions, 10670 flow, removed 133 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:23,506 INFO L231 Difference]: Finished difference. Result has 449 places, 734 transitions, 9318 flow [2024-06-21 20:45:23,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8998, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9318, PETRI_PLACES=449, PETRI_TRANSITIONS=734} [2024-06-21 20:45:23,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-21 20:45:23,507 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 734 transitions, 9318 flow [2024-06-21 20:45:23,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:23,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:23,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:23,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:45:23,508 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:23,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash 166940649, now seen corresponding path program 12 times [2024-06-21 20:45:23,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:23,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594811271] [2024-06-21 20:45:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:23,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:24,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594811271] [2024-06-21 20:45:24,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594811271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:24,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:24,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:24,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582142962] [2024-06-21 20:45:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:24,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:24,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:24,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 734 transitions, 9318 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:24,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:26,671 INFO L124 PetriNetUnfolderBase]: 5053/8277 cut-off events. [2024-06-21 20:45:26,671 INFO L125 PetriNetUnfolderBase]: For 2151388/2151395 co-relation queries the response was YES. [2024-06-21 20:45:26,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88987 conditions, 8277 events. 5053/8277 cut-off events. For 2151388/2151395 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 56129 event pairs, 981 based on Foata normal form. 8/8211 useless extension candidates. Maximal degree in co-relation 88777. Up to 7351 conditions per place. [2024-06-21 20:45:26,826 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 126 changer transitions 0/760 dead transitions. [2024-06-21 20:45:26,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 760 transitions, 11178 flow [2024-06-21 20:45:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:45:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:45:26,827 INFO L175 Difference]: Start difference. First operand has 449 places, 734 transitions, 9318 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:45:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 760 transitions, 11178 flow [2024-06-21 20:45:31,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 760 transitions, 10937 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:31,883 INFO L231 Difference]: Finished difference. Result has 451 places, 740 transitions, 9693 flow [2024-06-21 20:45:31,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9077, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9693, PETRI_PLACES=451, PETRI_TRANSITIONS=740} [2024-06-21 20:45:31,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-21 20:45:31,883 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 740 transitions, 9693 flow [2024-06-21 20:45:31,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:31,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:31,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:45:31,884 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:31,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash -433281943, now seen corresponding path program 13 times [2024-06-21 20:45:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:31,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308367415] [2024-06-21 20:45:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308367415] [2024-06-21 20:45:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308367415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335415654] [2024-06-21 20:45:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:32,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:32,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 740 transitions, 9693 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:32,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:32,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:32,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:35,299 INFO L124 PetriNetUnfolderBase]: 5057/8278 cut-off events. [2024-06-21 20:45:35,299 INFO L125 PetriNetUnfolderBase]: For 2183329/2183335 co-relation queries the response was YES. [2024-06-21 20:45:35,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89862 conditions, 8278 events. 5057/8278 cut-off events. For 2183329/2183335 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 56213 event pairs, 998 based on Foata normal form. 7/8212 useless extension candidates. Maximal degree in co-relation 89651. Up to 7500 conditions per place. [2024-06-21 20:45:35,449 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 642 selfloop transitions, 61 changer transitions 0/758 dead transitions. [2024-06-21 20:45:35,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 758 transitions, 11351 flow [2024-06-21 20:45:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:45:35,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:45:35,450 INFO L175 Difference]: Start difference. First operand has 451 places, 740 transitions, 9693 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:45:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 758 transitions, 11351 flow [2024-06-21 20:45:40,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 758 transitions, 10814 flow, removed 149 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:40,219 INFO L231 Difference]: Finished difference. Result has 453 places, 743 transitions, 9484 flow [2024-06-21 20:45:40,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9156, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9484, PETRI_PLACES=453, PETRI_TRANSITIONS=743} [2024-06-21 20:45:40,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-21 20:45:40,220 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 743 transitions, 9484 flow [2024-06-21 20:45:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:40,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:45:40,221 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:40,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash -433161539, now seen corresponding path program 5 times [2024-06-21 20:45:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:40,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570747066] [2024-06-21 20:45:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:41,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:41,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570747066] [2024-06-21 20:45:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570747066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:41,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925180375] [2024-06-21 20:45:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:41,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:41,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 743 transitions, 9484 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:41,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:41,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:41,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:43,810 INFO L124 PetriNetUnfolderBase]: 5065/8315 cut-off events. [2024-06-21 20:45:43,811 INFO L125 PetriNetUnfolderBase]: For 2210220/2210229 co-relation queries the response was YES. [2024-06-21 20:45:43,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90220 conditions, 8315 events. 5065/8315 cut-off events. For 2210220/2210229 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 56568 event pairs, 1316 based on Foata normal form. 9/8247 useless extension candidates. Maximal degree in co-relation 90008. Up to 7498 conditions per place. [2024-06-21 20:45:43,967 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 637 selfloop transitions, 69 changer transitions 0/761 dead transitions. [2024-06-21 20:45:43,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 761 transitions, 11070 flow [2024-06-21 20:45:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:45:43,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:45:43,968 INFO L175 Difference]: Start difference. First operand has 453 places, 743 transitions, 9484 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:45:43,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 761 transitions, 11070 flow [2024-06-21 20:45:49,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 761 transitions, 10784 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:49,184 INFO L231 Difference]: Finished difference. Result has 455 places, 746 transitions, 9464 flow [2024-06-21 20:45:49,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9464, PETRI_PLACES=455, PETRI_TRANSITIONS=746} [2024-06-21 20:45:49,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-21 20:45:49,185 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 746 transitions, 9464 flow [2024-06-21 20:45:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:49,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:49,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:45:49,185 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -433161973, now seen corresponding path program 14 times [2024-06-21 20:45:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389928560] [2024-06-21 20:45:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:50,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389928560] [2024-06-21 20:45:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389928560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:50,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530632962] [2024-06-21 20:45:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:50,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:50,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 746 transitions, 9464 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:50,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:50,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:50,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:52,613 INFO L124 PetriNetUnfolderBase]: 5078/8325 cut-off events. [2024-06-21 20:45:52,613 INFO L125 PetriNetUnfolderBase]: For 2229696/2229700 co-relation queries the response was YES. [2024-06-21 20:45:52,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91284 conditions, 8325 events. 5078/8325 cut-off events. For 2229696/2229700 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 56523 event pairs, 988 based on Foata normal form. 4/8255 useless extension candidates. Maximal degree in co-relation 91071. Up to 7304 conditions per place. [2024-06-21 20:45:52,765 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 538 selfloop transitions, 175 changer transitions 0/768 dead transitions. [2024-06-21 20:45:52,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 768 transitions, 11638 flow [2024-06-21 20:45:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:45:52,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:45:52,766 INFO L175 Difference]: Start difference. First operand has 455 places, 746 transitions, 9464 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:45:52,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 768 transitions, 11638 flow [2024-06-21 20:45:59,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 768 transitions, 11408 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:59,015 INFO L231 Difference]: Finished difference. Result has 457 places, 752 transitions, 9996 flow [2024-06-21 20:45:59,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9996, PETRI_PLACES=457, PETRI_TRANSITIONS=752} [2024-06-21 20:45:59,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-21 20:45:59,016 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 752 transitions, 9996 flow [2024-06-21 20:45:59,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:59,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:59,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:59,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:45:59,016 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:59,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 173436203, now seen corresponding path program 6 times [2024-06-21 20:45:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:59,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572398520] [2024-06-21 20:45:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:59,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:59,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572398520] [2024-06-21 20:45:59,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572398520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:59,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:59,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275516843] [2024-06-21 20:45:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:00,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:00,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 752 transitions, 9996 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:00,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:00,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:00,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:02,307 INFO L124 PetriNetUnfolderBase]: 5090/8352 cut-off events. [2024-06-21 20:46:02,307 INFO L125 PetriNetUnfolderBase]: For 2302171/2302180 co-relation queries the response was YES. [2024-06-21 20:46:02,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92526 conditions, 8352 events. 5090/8352 cut-off events. For 2302171/2302180 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56886 event pairs, 1317 based on Foata normal form. 9/8284 useless extension candidates. Maximal degree in co-relation 92312. Up to 7503 conditions per place. [2024-06-21 20:46:02,461 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 629 selfloop transitions, 92 changer transitions 0/776 dead transitions. [2024-06-21 20:46:02,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 776 transitions, 12054 flow [2024-06-21 20:46:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:46:02,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 20:46:02,462 INFO L175 Difference]: Start difference. First operand has 457 places, 752 transitions, 9996 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:46:02,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 776 transitions, 12054 flow [2024-06-21 20:46:09,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 776 transitions, 11741 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:09,316 INFO L231 Difference]: Finished difference. Result has 461 places, 760 transitions, 10186 flow [2024-06-21 20:46:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10186, PETRI_PLACES=461, PETRI_TRANSITIONS=760} [2024-06-21 20:46:09,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-21 20:46:09,316 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 760 transitions, 10186 flow [2024-06-21 20:46:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:09,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:09,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:09,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:46:09,317 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:09,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash -932619483, now seen corresponding path program 6 times [2024-06-21 20:46:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:09,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280644312] [2024-06-21 20:46:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:10,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:10,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280644312] [2024-06-21 20:46:10,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280644312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:10,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516487576] [2024-06-21 20:46:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:10,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:10,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:10,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 760 transitions, 10186 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:10,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:10,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:10,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:12,752 INFO L124 PetriNetUnfolderBase]: 5351/8710 cut-off events. [2024-06-21 20:46:12,753 INFO L125 PetriNetUnfolderBase]: For 2304414/2304420 co-relation queries the response was YES. [2024-06-21 20:46:12,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95603 conditions, 8710 events. 5351/8710 cut-off events. For 2304414/2304420 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58478 event pairs, 1410 based on Foata normal form. 5/8710 useless extension candidates. Maximal degree in co-relation 95387. Up to 8018 conditions per place. [2024-06-21 20:46:12,927 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 678 selfloop transitions, 106 changer transitions 0/789 dead transitions. [2024-06-21 20:46:12,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 789 transitions, 12589 flow [2024-06-21 20:46:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:46:12,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 20:46:12,928 INFO L175 Difference]: Start difference. First operand has 461 places, 760 transitions, 10186 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:46:12,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 789 transitions, 12589 flow [2024-06-21 20:46:18,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 789 transitions, 12368 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:18,973 INFO L231 Difference]: Finished difference. Result has 467 places, 775 transitions, 10772 flow [2024-06-21 20:46:18,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9972, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10772, PETRI_PLACES=467, PETRI_TRANSITIONS=775} [2024-06-21 20:46:18,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-21 20:46:18,974 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 775 transitions, 10772 flow [2024-06-21 20:46:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:18,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:18,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:46:18,974 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:18,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -988741420, now seen corresponding path program 2 times [2024-06-21 20:46:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388534431] [2024-06-21 20:46:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:20,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:20,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388534431] [2024-06-21 20:46:20,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388534431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:20,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:46:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859456043] [2024-06-21 20:46:20,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:20,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:46:20,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:46:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:46:20,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:20,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 775 transitions, 10772 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:20,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:20,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:20,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:23,524 INFO L124 PetriNetUnfolderBase]: 5556/9039 cut-off events. [2024-06-21 20:46:23,524 INFO L125 PetriNetUnfolderBase]: For 2393636/2393639 co-relation queries the response was YES. [2024-06-21 20:46:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98714 conditions, 9039 events. 5556/9039 cut-off events. For 2393636/2393639 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 61066 event pairs, 1020 based on Foata normal form. 12/9048 useless extension candidates. Maximal degree in co-relation 98495. Up to 6700 conditions per place. [2024-06-21 20:46:23,680 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 569 selfloop transitions, 273 changer transitions 0/847 dead transitions. [2024-06-21 20:46:23,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 847 transitions, 13207 flow [2024-06-21 20:46:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:46:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:46:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:46:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:46:23,682 INFO L175 Difference]: Start difference. First operand has 467 places, 775 transitions, 10772 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:46:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 847 transitions, 13207 flow [2024-06-21 20:46:30,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 847 transitions, 12949 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:30,709 INFO L231 Difference]: Finished difference. Result has 475 places, 797 transitions, 11495 flow [2024-06-21 20:46:30,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10514, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11495, PETRI_PLACES=475, PETRI_TRANSITIONS=797} [2024-06-21 20:46:30,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-21 20:46:30,709 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 797 transitions, 11495 flow [2024-06-21 20:46:30,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:30,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:30,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:30,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:46:30,710 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:30,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash -432853957, now seen corresponding path program 2 times [2024-06-21 20:46:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:30,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272102451] [2024-06-21 20:46:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:32,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272102451] [2024-06-21 20:46:32,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272102451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:32,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595344123] [2024-06-21 20:46:32,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:32,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:46:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 797 transitions, 11495 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:46:32,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:34,862 INFO L124 PetriNetUnfolderBase]: 5057/8389 cut-off events. [2024-06-21 20:46:34,863 INFO L125 PetriNetUnfolderBase]: For 2375485/2375561 co-relation queries the response was YES. [2024-06-21 20:46:34,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95218 conditions, 8389 events. 5057/8389 cut-off events. For 2375485/2375561 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 58420 event pairs, 1008 based on Foata normal form. 26/8311 useless extension candidates. Maximal degree in co-relation 94995. Up to 7318 conditions per place. [2024-06-21 20:46:35,034 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 605 selfloop transitions, 77 changer transitions 0/813 dead transitions. [2024-06-21 20:46:35,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 813 transitions, 12923 flow [2024-06-21 20:46:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:46:35,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:46:35,035 INFO L175 Difference]: Start difference. First operand has 475 places, 797 transitions, 11495 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:46:35,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 813 transitions, 12923 flow [2024-06-21 20:46:41,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 813 transitions, 12389 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:41,470 INFO L231 Difference]: Finished difference. Result has 478 places, 797 transitions, 11125 flow [2024-06-21 20:46:41,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11125, PETRI_PLACES=478, PETRI_TRANSITIONS=797} [2024-06-21 20:46:41,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-21 20:46:41,470 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 797 transitions, 11125 flow [2024-06-21 20:46:41,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:41,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:41,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:46:41,471 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:41,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1617635529, now seen corresponding path program 10 times [2024-06-21 20:46:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:41,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890827814] [2024-06-21 20:46:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:42,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890827814] [2024-06-21 20:46:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890827814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:42,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:42,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:42,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762988381] [2024-06-21 20:46:42,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:42,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:42,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:42,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 797 transitions, 11125 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:42,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:42,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:42,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:45,167 INFO L124 PetriNetUnfolderBase]: 5308/8723 cut-off events. [2024-06-21 20:46:45,167 INFO L125 PetriNetUnfolderBase]: For 2331754/2331769 co-relation queries the response was YES. [2024-06-21 20:46:45,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96259 conditions, 8723 events. 5308/8723 cut-off events. For 2331754/2331769 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 59872 event pairs, 1062 based on Foata normal form. 17/8659 useless extension candidates. Maximal degree in co-relation 96035. Up to 7903 conditions per place. [2024-06-21 20:46:45,333 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 688 selfloop transitions, 64 changer transitions 0/810 dead transitions. [2024-06-21 20:46:45,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 810 transitions, 12799 flow [2024-06-21 20:46:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:46:45,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 20:46:45,335 INFO L175 Difference]: Start difference. First operand has 478 places, 797 transitions, 11125 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:46:45,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 810 transitions, 12799 flow [2024-06-21 20:46:51,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 810 transitions, 12587 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:46:51,848 INFO L231 Difference]: Finished difference. Result has 478 places, 799 transitions, 11182 flow [2024-06-21 20:46:51,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11182, PETRI_PLACES=478, PETRI_TRANSITIONS=799} [2024-06-21 20:46:51,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-21 20:46:51,849 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 799 transitions, 11182 flow [2024-06-21 20:46:51,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:51,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:51,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:46:51,849 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:51,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash -504056249, now seen corresponding path program 15 times [2024-06-21 20:46:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:51,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155428916] [2024-06-21 20:46:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:52,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155428916] [2024-06-21 20:46:52,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155428916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:52,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327286038] [2024-06-21 20:46:52,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:52,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:52,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:52,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:52,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 799 transitions, 11182 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:52,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:52,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:52,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:55,458 INFO L124 PetriNetUnfolderBase]: 5318/8744 cut-off events. [2024-06-21 20:46:55,459 INFO L125 PetriNetUnfolderBase]: For 2321921/2321930 co-relation queries the response was YES. [2024-06-21 20:46:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96693 conditions, 8744 events. 5318/8744 cut-off events. For 2321921/2321930 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 59993 event pairs, 1050 based on Foata normal form. 11/8674 useless extension candidates. Maximal degree in co-relation 96468. Up to 7832 conditions per place. [2024-06-21 20:46:55,613 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 681 selfloop transitions, 85 changer transitions 0/824 dead transitions. [2024-06-21 20:46:55,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 824 transitions, 13168 flow [2024-06-21 20:46:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:46:55,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:46:55,614 INFO L175 Difference]: Start difference. First operand has 478 places, 799 transitions, 11182 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:46:55,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 824 transitions, 13168 flow [2024-06-21 20:47:01,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 824 transitions, 12803 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:01,954 INFO L231 Difference]: Finished difference. Result has 478 places, 805 transitions, 11364 flow [2024-06-21 20:47:01,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11364, PETRI_PLACES=478, PETRI_TRANSITIONS=805} [2024-06-21 20:47:01,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-21 20:47:01,954 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 805 transitions, 11364 flow [2024-06-21 20:47:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:01,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:01,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:01,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:47:01,955 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:01,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -503877503, now seen corresponding path program 7 times [2024-06-21 20:47:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:01,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197328950] [2024-06-21 20:47:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:01,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197328950] [2024-06-21 20:47:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197328950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:02,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270162697] [2024-06-21 20:47:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:02,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:02,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:02,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:02,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 805 transitions, 11364 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:02,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:02,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:05,566 INFO L124 PetriNetUnfolderBase]: 5565/9086 cut-off events. [2024-06-21 20:47:05,566 INFO L125 PetriNetUnfolderBase]: For 2347374/2347380 co-relation queries the response was YES. [2024-06-21 20:47:05,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98971 conditions, 9086 events. 5565/9086 cut-off events. For 2347374/2347380 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 61675 event pairs, 1471 based on Foata normal form. 6/9088 useless extension candidates. Maximal degree in co-relation 98746. Up to 8447 conditions per place. [2024-06-21 20:47:05,747 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 763 selfloop transitions, 63 changer transitions 0/831 dead transitions. [2024-06-21 20:47:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 831 transitions, 13451 flow [2024-06-21 20:47:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:47:05,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:47:05,748 INFO L175 Difference]: Start difference. First operand has 478 places, 805 transitions, 11364 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:47:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 831 transitions, 13451 flow [2024-06-21 20:47:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 831 transitions, 12973 flow, removed 158 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:13,549 INFO L231 Difference]: Finished difference. Result has 480 places, 811 transitions, 11362 flow [2024-06-21 20:47:13,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10886, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11362, PETRI_PLACES=480, PETRI_TRANSITIONS=811} [2024-06-21 20:47:13,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-21 20:47:13,549 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 811 transitions, 11362 flow [2024-06-21 20:47:13,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:13,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:13,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:13,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:47:13,550 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:13,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2005538907, now seen corresponding path program 8 times [2024-06-21 20:47:13,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:13,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858411151] [2024-06-21 20:47:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:13,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858411151] [2024-06-21 20:47:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858411151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:14,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:14,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:14,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878571334] [2024-06-21 20:47:14,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:14,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:14,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 811 transitions, 11362 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:14,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:14,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:14,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:17,454 INFO L124 PetriNetUnfolderBase]: 5575/9100 cut-off events. [2024-06-21 20:47:17,455 INFO L125 PetriNetUnfolderBase]: For 2375656/2375662 co-relation queries the response was YES. [2024-06-21 20:47:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99179 conditions, 9100 events. 5575/9100 cut-off events. For 2375656/2375662 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 61822 event pairs, 1479 based on Foata normal form. 6/9102 useless extension candidates. Maximal degree in co-relation 98953. Up to 8461 conditions per place. [2024-06-21 20:47:17,611 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 764 selfloop transitions, 67 changer transitions 0/836 dead transitions. [2024-06-21 20:47:17,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 836 transitions, 13458 flow [2024-06-21 20:47:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:47:17,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 20:47:17,612 INFO L175 Difference]: Start difference. First operand has 480 places, 811 transitions, 11362 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:47:17,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 836 transitions, 13458 flow [2024-06-21 20:47:25,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 836 transitions, 13054 flow, removed 143 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:25,919 INFO L231 Difference]: Finished difference. Result has 482 places, 817 transitions, 11454 flow [2024-06-21 20:47:25,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10958, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11454, PETRI_PLACES=482, PETRI_TRANSITIONS=817} [2024-06-21 20:47:25,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-21 20:47:25,920 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 817 transitions, 11454 flow [2024-06-21 20:47:25,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:25,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:25,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:47:25,920 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:25,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 517728509, now seen corresponding path program 9 times [2024-06-21 20:47:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:25,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386701519] [2024-06-21 20:47:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:25,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:26,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:26,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386701519] [2024-06-21 20:47:26,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386701519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:26,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:26,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280690560] [2024-06-21 20:47:26,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:26,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:26,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:26,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:26,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 817 transitions, 11454 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:26,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:26,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:26,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:30,162 INFO L124 PetriNetUnfolderBase]: 5569/9092 cut-off events. [2024-06-21 20:47:30,162 INFO L125 PetriNetUnfolderBase]: For 2378188/2378194 co-relation queries the response was YES. [2024-06-21 20:47:30,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98657 conditions, 9092 events. 5569/9092 cut-off events. For 2378188/2378194 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 61770 event pairs, 1469 based on Foata normal form. 6/9094 useless extension candidates. Maximal degree in co-relation 98430. Up to 8435 conditions per place. [2024-06-21 20:47:30,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 748 selfloop transitions, 81 changer transitions 0/834 dead transitions. [2024-06-21 20:47:30,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 834 transitions, 13201 flow [2024-06-21 20:47:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:47:30,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 20:47:30,324 INFO L175 Difference]: Start difference. First operand has 482 places, 817 transitions, 11454 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:47:30,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 834 transitions, 13201 flow [2024-06-21 20:47:36,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 834 transitions, 12571 flow, removed 252 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:36,693 INFO L231 Difference]: Finished difference. Result has 485 places, 817 transitions, 10996 flow [2024-06-21 20:47:36,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10996, PETRI_PLACES=485, PETRI_TRANSITIONS=817} [2024-06-21 20:47:36,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-21 20:47:36,694 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 817 transitions, 10996 flow [2024-06-21 20:47:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:36,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:36,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:36,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:47:36,694 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:36,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:36,694 INFO L85 PathProgramCache]: Analyzing trace with hash 758782649, now seen corresponding path program 10 times [2024-06-21 20:47:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:36,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350249719] [2024-06-21 20:47:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:36,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:37,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350249719] [2024-06-21 20:47:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350249719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:37,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027207088] [2024-06-21 20:47:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 817 transitions, 10996 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:37,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:37,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:40,722 INFO L124 PetriNetUnfolderBase]: 5574/9109 cut-off events. [2024-06-21 20:47:40,722 INFO L125 PetriNetUnfolderBase]: For 2390253/2390259 co-relation queries the response was YES. [2024-06-21 20:47:40,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98590 conditions, 9109 events. 5574/9109 cut-off events. For 2390253/2390259 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 61999 event pairs, 1479 based on Foata normal form. 5/9110 useless extension candidates. Maximal degree in co-relation 98362. Up to 8436 conditions per place. [2024-06-21 20:47:40,880 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 741 selfloop transitions, 90 changer transitions 0/836 dead transitions. [2024-06-21 20:47:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 836 transitions, 12924 flow [2024-06-21 20:47:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:47:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 20:47:40,881 INFO L175 Difference]: Start difference. First operand has 485 places, 817 transitions, 10996 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:47:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 836 transitions, 12924 flow [2024-06-21 20:47:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 836 transitions, 12679 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:47,505 INFO L231 Difference]: Finished difference. Result has 487 places, 820 transitions, 11133 flow [2024-06-21 20:47:47,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11133, PETRI_PLACES=487, PETRI_TRANSITIONS=820} [2024-06-21 20:47:47,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-21 20:47:47,506 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 820 transitions, 11133 flow [2024-06-21 20:47:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:47,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:47:47,507 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:47,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 517728323, now seen corresponding path program 16 times [2024-06-21 20:47:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979001908] [2024-06-21 20:47:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979001908] [2024-06-21 20:47:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979001908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241215770] [2024-06-21 20:47:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:48,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:48,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 820 transitions, 11133 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:48,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:48,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:48,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:51,573 INFO L124 PetriNetUnfolderBase]: 5329/8749 cut-off events. [2024-06-21 20:47:51,573 INFO L125 PetriNetUnfolderBase]: For 2413932/2413941 co-relation queries the response was YES. [2024-06-21 20:47:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96519 conditions, 8749 events. 5329/8749 cut-off events. For 2413932/2413941 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59940 event pairs, 1045 based on Foata normal form. 11/8679 useless extension candidates. Maximal degree in co-relation 96290. Up to 7831 conditions per place. [2024-06-21 20:47:51,755 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 679 selfloop transitions, 95 changer transitions 0/837 dead transitions. [2024-06-21 20:47:51,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 837 transitions, 12774 flow [2024-06-21 20:47:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:47:51,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:47:51,756 INFO L175 Difference]: Start difference. First operand has 487 places, 820 transitions, 11133 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:47:51,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 837 transitions, 12774 flow [2024-06-21 20:47:57,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 837 transitions, 12212 flow, removed 193 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:57,897 INFO L231 Difference]: Finished difference. Result has 489 places, 820 transitions, 10771 flow [2024-06-21 20:47:57,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10571, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10771, PETRI_PLACES=489, PETRI_TRANSITIONS=820} [2024-06-21 20:47:57,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-21 20:47:57,898 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 820 transitions, 10771 flow [2024-06-21 20:47:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:57,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:57,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:47:57,898 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:57,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2050329277, now seen corresponding path program 7 times [2024-06-21 20:47:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:57,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358169154] [2024-06-21 20:47:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358169154] [2024-06-21 20:47:58,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358169154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:58,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:58,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579983975] [2024-06-21 20:47:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:58,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:59,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:59,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 820 transitions, 10771 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:59,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:59,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:59,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:02,109 INFO L124 PetriNetUnfolderBase]: 5322/8756 cut-off events. [2024-06-21 20:48:02,109 INFO L125 PetriNetUnfolderBase]: For 2432626/2432650 co-relation queries the response was YES. [2024-06-21 20:48:02,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95484 conditions, 8756 events. 5322/8756 cut-off events. For 2432626/2432650 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 60360 event pairs, 1386 based on Foata normal form. 24/8701 useless extension candidates. Maximal degree in co-relation 95254. Up to 7951 conditions per place. [2024-06-21 20:48:02,286 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 728 selfloop transitions, 47 changer transitions 0/838 dead transitions. [2024-06-21 20:48:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 838 transitions, 12461 flow [2024-06-21 20:48:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:48:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:48:02,287 INFO L175 Difference]: Start difference. First operand has 489 places, 820 transitions, 10771 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:48:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 838 transitions, 12461 flow [2024-06-21 20:48:09,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 838 transitions, 11853 flow, removed 158 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:09,671 INFO L231 Difference]: Finished difference. Result has 490 places, 822 transitions, 10334 flow [2024-06-21 20:48:09,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10203, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10334, PETRI_PLACES=490, PETRI_TRANSITIONS=822} [2024-06-21 20:48:09,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-21 20:48:09,671 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 822 transitions, 10334 flow [2024-06-21 20:48:09,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:09,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:09,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:09,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:48:09,672 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:09,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1831094237, now seen corresponding path program 11 times [2024-06-21 20:48:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:09,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595393082] [2024-06-21 20:48:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:09,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595393082] [2024-06-21 20:48:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595393082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:10,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:10,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455339805] [2024-06-21 20:48:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:10,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:10,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 822 transitions, 10334 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:13,839 INFO L124 PetriNetUnfolderBase]: 5575/9104 cut-off events. [2024-06-21 20:48:13,839 INFO L125 PetriNetUnfolderBase]: For 2315767/2315773 co-relation queries the response was YES. [2024-06-21 20:48:13,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96426 conditions, 9104 events. 5575/9104 cut-off events. For 2315767/2315773 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 61764 event pairs, 1449 based on Foata normal form. 5/9105 useless extension candidates. Maximal degree in co-relation 96195. Up to 8386 conditions per place. [2024-06-21 20:48:14,016 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 703 selfloop transitions, 134 changer transitions 0/842 dead transitions. [2024-06-21 20:48:14,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 842 transitions, 12736 flow [2024-06-21 20:48:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:48:14,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 20:48:14,017 INFO L175 Difference]: Start difference. First operand has 490 places, 822 transitions, 10334 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:48:14,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 842 transitions, 12736 flow [2024-06-21 20:48:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 842 transitions, 12518 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:21,003 INFO L231 Difference]: Finished difference. Result has 493 places, 828 transitions, 10780 flow [2024-06-21 20:48:21,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10156, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10780, PETRI_PLACES=493, PETRI_TRANSITIONS=828} [2024-06-21 20:48:21,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-21 20:48:21,003 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 828 transitions, 10780 flow [2024-06-21 20:48:21,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:21,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:21,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:21,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:48:21,004 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:21,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash 977335625, now seen corresponding path program 8 times [2024-06-21 20:48:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:21,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537849176] [2024-06-21 20:48:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:22,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537849176] [2024-06-21 20:48:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537849176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:22,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:22,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688244742] [2024-06-21 20:48:22,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:22,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:48:22,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 828 transitions, 10780 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:22,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:22,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:48:22,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:25,265 INFO L124 PetriNetUnfolderBase]: 5351/8796 cut-off events. [2024-06-21 20:48:25,265 INFO L125 PetriNetUnfolderBase]: For 2185797/2185821 co-relation queries the response was YES. [2024-06-21 20:48:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91278 conditions, 8796 events. 5351/8796 cut-off events. For 2185797/2185821 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60560 event pairs, 1384 based on Foata normal form. 23/8740 useless extension candidates. Maximal degree in co-relation 91046. Up to 7943 conditions per place. [2024-06-21 20:48:25,423 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 705 selfloop transitions, 80 changer transitions 0/850 dead transitions. [2024-06-21 20:48:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 850 transitions, 12927 flow [2024-06-21 20:48:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:48:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:48:25,424 INFO L175 Difference]: Start difference. First operand has 493 places, 828 transitions, 10780 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:48:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 850 transitions, 12927 flow [2024-06-21 20:48:32,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 850 transitions, 12582 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:32,192 INFO L231 Difference]: Finished difference. Result has 497 places, 836 transitions, 10870 flow [2024-06-21 20:48:32,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10435, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10870, PETRI_PLACES=497, PETRI_TRANSITIONS=836} [2024-06-21 20:48:32,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-21 20:48:32,192 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 836 transitions, 10870 flow [2024-06-21 20:48:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:32,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:32,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:32,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:48:32,193 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:32,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:32,193 INFO L85 PathProgramCache]: Analyzing trace with hash -491675903, now seen corresponding path program 12 times [2024-06-21 20:48:32,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:32,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694714427] [2024-06-21 20:48:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:33,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:33,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694714427] [2024-06-21 20:48:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694714427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:33,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391597459] [2024-06-21 20:48:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:33,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:33,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:33,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 836 transitions, 10870 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:33,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:33,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:33,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:36,201 INFO L124 PetriNetUnfolderBase]: 5585/9118 cut-off events. [2024-06-21 20:48:36,201 INFO L125 PetriNetUnfolderBase]: For 2175200/2175206 co-relation queries the response was YES. [2024-06-21 20:48:36,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93599 conditions, 9118 events. 5585/9118 cut-off events. For 2175200/2175206 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 61888 event pairs, 1447 based on Foata normal form. 5/9119 useless extension candidates. Maximal degree in co-relation 93365. Up to 8401 conditions per place. [2024-06-21 20:48:36,365 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 715 selfloop transitions, 129 changer transitions 0/849 dead transitions. [2024-06-21 20:48:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 849 transitions, 12614 flow [2024-06-21 20:48:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:48:36,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 20:48:36,366 INFO L175 Difference]: Start difference. First operand has 497 places, 836 transitions, 10870 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:48:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 849 transitions, 12614 flow [2024-06-21 20:48:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 849 transitions, 12297 flow, removed 124 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:44,354 INFO L231 Difference]: Finished difference. Result has 502 places, 836 transitions, 10817 flow [2024-06-21 20:48:44,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10553, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10817, PETRI_PLACES=502, PETRI_TRANSITIONS=836} [2024-06-21 20:48:44,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-21 20:48:44,355 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 836 transitions, 10817 flow [2024-06-21 20:48:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:44,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:44,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:48:44,355 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:44,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 931035203, now seen corresponding path program 17 times [2024-06-21 20:48:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549107610] [2024-06-21 20:48:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549107610] [2024-06-21 20:48:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549107610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:45,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:45,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059724611] [2024-06-21 20:48:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:45,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:48:45,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 836 transitions, 10817 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:45,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:45,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:48:45,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand