./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.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/mix001.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/mix001.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix001.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 20:29:53,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:29:54,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:29:54,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:29:54,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:29:54,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:29:54,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:29:54,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:29:54,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:29:54,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:29:54,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:29:54,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:29:54,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:29:54,060 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:29:54,060 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:29:54,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:29:54,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:29:54,061 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:29:54,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:29:54,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:29:54,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:29:54,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:29:54,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:29:54,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:29:54,063 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:29:54,063 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:29:54,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:29:54,064 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:29:54,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:29:54,065 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:29:54,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:29:54,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:29:54,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:29:54,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:29:54,067 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:29:54,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:29:54,067 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:29:54,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:29:54,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:29:54,068 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:29:54,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:29:54,069 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:29:54,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:29:54,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:29:54,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:29:54,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:29:54,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:29:54,371 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:29:54,372 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:29:54,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix001.opt.yml/witness.yml [2024-06-21 20:29:54,578 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:29:54,579 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:29:54,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-21 20:29:55,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:29:56,006 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:29:56,006 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-21 20:29:56,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb1c7add/746910f8dc2a4a68a5ed50d064ca0877/FLAG99d9e796c [2024-06-21 20:29:56,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb1c7add/746910f8dc2a4a68a5ed50d064ca0877 [2024-06-21 20:29:56,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:29:56,036 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:29:56,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:29:56,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:29:56,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:29:56,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:29:54" (1/2) ... [2024-06-21 20:29:56,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623b81a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:29:56, skipping insertion in model container [2024-06-21 20:29:56,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:29:54" (1/2) ... [2024-06-21 20:29:56,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@630287c1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:29:56, skipping insertion in model container [2024-06-21 20:29:56,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:29:56" (2/2) ... [2024-06-21 20:29:56,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623b81a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56, skipping insertion in model container [2024-06-21 20:29:56,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:29:56" (2/2) ... [2024-06-21 20:29:56,047 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:29:56,152 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:29:56,153 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:29:56,153 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:29:56,153 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:29:56,154 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:29:56,154 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 20:29:56,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:29:56,518 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:29:56,533 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:29:56,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:29:56,718 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:29:56,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56 WrapperNode [2024-06-21 20:29:56,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:29:56,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:29:56,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:29:56,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:29:56,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,752 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,807 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 20:29:56,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:29:56,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:29:56,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:29:56,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:29:56,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,910 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 20:29:56,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:29:56,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:29:56,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:29:56,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:29:56,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (1/1) ... [2024-06-21 20:29:56,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:29:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:29:56,993 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 20:29:57,014 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 20:29:57,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:29:57,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:29:57,037 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:29:57,037 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:29:57,038 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:29:57,038 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:29:57,038 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:29:57,038 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:29:57,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:29:57,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:29:57,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:29:57,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:29:57,041 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 20:29:57,204 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:29:57,206 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:29:57,570 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:29:57,570 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:29:57,808 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:29:57,809 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:29:57,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:29:57 BoogieIcfgContainer [2024-06-21 20:29:57,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:29:57,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:29:57,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:29:57,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:29:57,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:29:54" (1/4) ... [2024-06-21 20:29:57,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1308a5ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:29:57, skipping insertion in model container [2024-06-21 20:29:57,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:29:56" (2/4) ... [2024-06-21 20:29:57,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1308a5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:29:57, skipping insertion in model container [2024-06-21 20:29:57,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:29:56" (3/4) ... [2024-06-21 20:29:57,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1308a5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:29:57, skipping insertion in model container [2024-06-21 20:29:57,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:29:57" (4/4) ... [2024-06-21 20:29:57,817 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.opt.i [2024-06-21 20:29:57,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:29:57,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:29:57,833 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:29:57,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:29:57,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:29:57,953 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 20:29:57,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:29:57,956 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 5. Compared 77 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 20:29:57,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:29:57,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 20:29:57,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:29:57,980 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;@39842647, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:29:57,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:29:57,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:29:57,986 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:29:57,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:29:57,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:57,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:29:57,987 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 20:29:57,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 402627273, now seen corresponding path program 1 times [2024-06-21 20:29:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:58,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585451169] [2024-06-21 20:29:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:59,352 INFO 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 20:29:59,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585451169] [2024-06-21 20:29:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585451169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:59,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:59,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:29:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596638174] [2024-06-21 20:29:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:59,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:29:59,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:29:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:29:59,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-21 20:29:59,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:59,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:59,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-21 20:29:59,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:59,806 INFO L124 PetriNetUnfolderBase]: 869/1413 cut-off events. [2024-06-21 20:29:59,807 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 20:29:59,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 1413 events. 869/1413 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7439 event pairs, 566 based on Foata normal form. 1/1349 useless extension candidates. Maximal degree in co-relation 2779. Up to 1315 conditions per place. [2024-06-21 20:29:59,823 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 20:29:59,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 171 flow [2024-06-21 20:29:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:29:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:29:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-21 20:29:59,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-06-21 20:29:59,837 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 85 transitions. [2024-06-21 20:29:59,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 171 flow [2024-06-21 20:29:59,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:29:59,842 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 20:29:59,844 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 20:29:59,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 20:29:59,848 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 20:29:59,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:59,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:59,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:29:59,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:29:59,849 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 20:29:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash 378898490, now seen corresponding path program 1 times [2024-06-21 20:29:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037829297] [2024-06-21 20:29:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:00,813 INFO 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 20:30:00,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:00,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037829297] [2024-06-21 20:30:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037829297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:00,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:30:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642620118] [2024-06-21 20:30:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:30:00,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:30:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:30:00,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:30:00,898 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 20:30:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:00,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:30:00,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:01,245 INFO L124 PetriNetUnfolderBase]: 1280/1980 cut-off events. [2024-06-21 20:30:01,245 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-06-21 20:30:01,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1980 events. 1280/1980 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10119 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4489. Up to 1897 conditions per place. [2024-06-21 20:30:01,256 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 20:30:01,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-21 20:30:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:30:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:30:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 20:30:01,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 20:30:01,259 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-21 20:30:01,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-21 20:30:01,261 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 20:30:01,262 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 20:30:01,263 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 20:30:01,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 20:30:01,263 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 20:30:01,264 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 20:30:01,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:01,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:30:01,265 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 20:30:01,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1139047968, now seen corresponding path program 1 times [2024-06-21 20:30:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485247782] [2024-06-21 20:30:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:02,308 INFO 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 20:30:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485247782] [2024-06-21 20:30:02,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485247782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:02,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:30:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787719850] [2024-06-21 20:30:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:30:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:30:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:30:02,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:30:02,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:02,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:02,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:30:02,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:02,735 INFO L124 PetriNetUnfolderBase]: 1274/2001 cut-off events. [2024-06-21 20:30:02,735 INFO L125 PetriNetUnfolderBase]: For 1129/1129 co-relation queries the response was YES. [2024-06-21 20:30:02,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5030 conditions, 2001 events. 1274/2001 cut-off events. For 1129/1129 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10378 event pairs, 608 based on Foata normal form. 3/2000 useless extension candidates. Maximal degree in co-relation 5016. Up to 1873 conditions per place. [2024-06-21 20:30:02,749 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-21 20:30:02,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 320 flow [2024-06-21 20:30:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:30:02,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:30:02,751 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:30:02,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 320 flow [2024-06-21 20:30:02,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 306 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:02,754 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-21 20:30:02,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 20:30:02,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 20:30:02,755 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-21 20:30:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:02,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:02,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:02,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:30:02,756 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 20:30:02,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:02,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1246507511, now seen corresponding path program 1 times [2024-06-21 20:30:02,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:02,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643746634] [2024-06-21 20:30:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:02,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:03,573 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 20:30:03,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643746634] [2024-06-21 20:30:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643746634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:03,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:03,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:30:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174647207] [2024-06-21 20:30:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:03,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:30:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:30:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:30:03,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:30:03,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 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 20:30:03,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:30:03,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:04,220 INFO L124 PetriNetUnfolderBase]: 1546/2453 cut-off events. [2024-06-21 20:30:04,220 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-06-21 20:30:04,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 2453 events. 1546/2453 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12789 event pairs, 853 based on Foata normal form. 2/2408 useless extension candidates. Maximal degree in co-relation 6586. Up to 2282 conditions per place. [2024-06-21 20:30:04,236 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 20:30:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 316 flow [2024-06-21 20:30:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 20:30:04,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-21 20:30:04,241 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 5 states and 106 transitions. [2024-06-21 20:30:04,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 316 flow [2024-06-21 20:30:04,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:04,246 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 196 flow [2024-06-21 20:30:04,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 20:30:04,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 20:30:04,248 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 196 flow [2024-06-21 20:30:04,248 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 20:30:04,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:04,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:30:04,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:04,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1159347704, now seen corresponding path program 1 times [2024-06-21 20:30:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728443680] [2024-06-21 20:30:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:05,773 INFO 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 20:30:05,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728443680] [2024-06-21 20:30:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728443680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:05,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:05,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072619874] [2024-06-21 20:30:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:05,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:30:05,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:05,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:05,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:30:05,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:06,408 INFO L124 PetriNetUnfolderBase]: 1763/2718 cut-off events. [2024-06-21 20:30:06,411 INFO L125 PetriNetUnfolderBase]: For 4298/4298 co-relation queries the response was YES. [2024-06-21 20:30:06,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7977 conditions, 2718 events. 1763/2718 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13851 event pairs, 617 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 7960. Up to 2517 conditions per place. [2024-06-21 20:30:06,428 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-21 20:30:06,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 450 flow [2024-06-21 20:30:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:30:06,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-21 20:30:06,430 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 196 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:30:06,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 450 flow [2024-06-21 20:30:06,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 430 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:06,436 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 243 flow [2024-06-21 20:30:06,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-21 20:30:06,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 20:30:06,440 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 243 flow [2024-06-21 20:30:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:06,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:30:06,446 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 20:30:06,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:06,447 INFO L85 PathProgramCache]: Analyzing trace with hash 19203124, now seen corresponding path program 1 times [2024-06-21 20:30:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532135322] [2024-06-21 20:30:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:07,305 INFO 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 20:30:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532135322] [2024-06-21 20:30:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532135322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145016904] [2024-06-21 20:30:07,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:07,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:30:07,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:30:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:08,058 INFO L124 PetriNetUnfolderBase]: 1517/2438 cut-off events. [2024-06-21 20:30:08,058 INFO L125 PetriNetUnfolderBase]: For 5121/5121 co-relation queries the response was YES. [2024-06-21 20:30:08,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2438 events. 1517/2438 cut-off events. For 5121/5121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12847 event pairs, 653 based on Foata normal form. 4/2432 useless extension candidates. Maximal degree in co-relation 7607. Up to 2235 conditions per place. [2024-06-21 20:30:08,079 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-21 20:30:08,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 425 flow [2024-06-21 20:30:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 20:30:08,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-21 20:30:08,080 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 243 flow. Second operand 6 states and 125 transitions. [2024-06-21 20:30:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 425 flow [2024-06-21 20:30:08,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:08,085 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-21 20:30:08,086 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 20:30:08,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 20:30:08,088 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-21 20:30:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:08,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:08,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:08,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:30:08,089 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 20:30:08,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash -408779306, now seen corresponding path program 1 times [2024-06-21 20:30:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:08,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581786280] [2024-06-21 20:30:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:08,932 INFO 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 20:30:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581786280] [2024-06-21 20:30:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581786280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:08,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:08,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:08,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653199317] [2024-06-21 20:30:08,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:08,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:08,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:08,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:08,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:08,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:09,647 INFO L124 PetriNetUnfolderBase]: 1880/2837 cut-off events. [2024-06-21 20:30:09,647 INFO L125 PetriNetUnfolderBase]: For 8266/8272 co-relation queries the response was YES. [2024-06-21 20:30:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 2837 events. 1880/2837 cut-off events. For 8266/8272 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13942 event pairs, 777 based on Foata normal form. 6/2841 useless extension candidates. Maximal degree in co-relation 9580. Up to 2734 conditions per place. [2024-06-21 20:30:09,672 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 20:30:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 526 flow [2024-06-21 20:30:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:30:09,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 20:30:09,674 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:30:09,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 526 flow [2024-06-21 20:30:09,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 494 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:09,679 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-21 20:30:09,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-21 20:30:09,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 20:30:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-21 20:30:09,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:09,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:09,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:09,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:30:09,681 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 20:30:09,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 628357624, now seen corresponding path program 2 times [2024-06-21 20:30:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233680605] [2024-06-21 20:30:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:10,471 INFO 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 20:30:10,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:10,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233680605] [2024-06-21 20:30:10,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233680605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:10,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:10,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:10,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733068572] [2024-06-21 20:30:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:10,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:10,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:10,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:10,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:10,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:10,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:10,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:11,207 INFO L124 PetriNetUnfolderBase]: 1875/2831 cut-off events. [2024-06-21 20:30:11,207 INFO L125 PetriNetUnfolderBase]: For 10712/10725 co-relation queries the response was YES. [2024-06-21 20:30:11,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2831 events. 1875/2831 cut-off events. For 10712/10725 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13937 event pairs, 780 based on Foata normal form. 12/2841 useless extension candidates. Maximal degree in co-relation 10155. Up to 2729 conditions per place. [2024-06-21 20:30:11,225 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 20:30:11,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 494 flow [2024-06-21 20:30:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 20:30:11,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:30:11,229 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 6 states and 116 transitions. [2024-06-21 20:30:11,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 494 flow [2024-06-21 20:30:11,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 458 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:11,238 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 322 flow [2024-06-21 20:30:11,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 20:30:11,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-21 20:30:11,240 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 322 flow [2024-06-21 20:30:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:11,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:11,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:30:11,240 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 20:30:11,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1745515442, now seen corresponding path program 1 times [2024-06-21 20:30:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994856143] [2024-06-21 20:30:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:12,069 INFO 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 20:30:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994856143] [2024-06-21 20:30:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994856143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:12,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:12,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:12,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355694790] [2024-06-21 20:30:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:12,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:12,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 322 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 20:30:12,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:12,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:12,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:12,832 INFO L124 PetriNetUnfolderBase]: 1972/2980 cut-off events. [2024-06-21 20:30:12,832 INFO L125 PetriNetUnfolderBase]: For 13141/13151 co-relation queries the response was YES. [2024-06-21 20:30:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 2980 events. 1972/2980 cut-off events. For 13141/13151 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14660 event pairs, 755 based on Foata normal form. 10/2988 useless extension candidates. Maximal degree in co-relation 11076. Up to 2769 conditions per place. [2024-06-21 20:30:12,851 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 41 changer transitions 0/120 dead transitions. [2024-06-21 20:30:12,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 120 transitions, 942 flow [2024-06-21 20:30:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:30:12,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 20:30:12,853 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 322 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:30:12,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 120 transitions, 942 flow [2024-06-21 20:30:12,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 877 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:12,863 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 604 flow [2024-06-21 20:30:12,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2024-06-21 20:30:12,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-21 20:30:12,864 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 604 flow [2024-06-21 20:30:12,864 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 20:30:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:30:12,865 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 20:30:12,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 212595122, now seen corresponding path program 2 times [2024-06-21 20:30:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:12,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747964943] [2024-06-21 20:30:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:12,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:13,729 INFO 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 20:30:13,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:13,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747964943] [2024-06-21 20:30:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747964943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:13,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:13,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:13,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316084690] [2024-06-21 20:30:13,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:13,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:13,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:13,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 604 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 20:30:13,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:13,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:13,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:14,489 INFO L124 PetriNetUnfolderBase]: 1988/3002 cut-off events. [2024-06-21 20:30:14,490 INFO L125 PetriNetUnfolderBase]: For 16689/16703 co-relation queries the response was YES. [2024-06-21 20:30:14,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12115 conditions, 3002 events. 1988/3002 cut-off events. For 16689/16703 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14773 event pairs, 760 based on Foata normal form. 16/3016 useless extension candidates. Maximal degree in co-relation 12087. Up to 2787 conditions per place. [2024-06-21 20:30:14,510 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 49 changer transitions 0/120 dead transitions. [2024-06-21 20:30:14,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 1032 flow [2024-06-21 20:30:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 20:30:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 20:30:14,512 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 604 flow. Second operand 7 states and 142 transitions. [2024-06-21 20:30:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 1032 flow [2024-06-21 20:30:14,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 998 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:14,528 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 753 flow [2024-06-21 20:30:14,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-21 20:30:14,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 20:30:14,529 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 753 flow [2024-06-21 20:30:14,529 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 20:30:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:14,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:30:14,530 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 20:30:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 212745069, now seen corresponding path program 1 times [2024-06-21 20:30:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218367482] [2024-06-21 20:30:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:15,342 INFO 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 20:30:15,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:15,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218367482] [2024-06-21 20:30:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218367482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:15,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:15,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796764702] [2024-06-21 20:30:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:15,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:15,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:15,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 753 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 20:30:15,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:15,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:15,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:16,093 INFO L124 PetriNetUnfolderBase]: 2010/3039 cut-off events. [2024-06-21 20:30:16,093 INFO L125 PetriNetUnfolderBase]: For 19411/19419 co-relation queries the response was YES. [2024-06-21 20:30:16,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12587 conditions, 3039 events. 2010/3039 cut-off events. For 19411/19419 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14922 event pairs, 710 based on Foata normal form. 12/3046 useless extension candidates. Maximal degree in co-relation 12557. Up to 2832 conditions per place. [2024-06-21 20:30:16,113 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-21 20:30:16,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1185 flow [2024-06-21 20:30:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:30:16,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 20:30:16,114 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 753 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:30:16,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1185 flow [2024-06-21 20:30:16,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:16,133 INFO L231 Difference]: Finished difference. Result has 77 places, 98 transitions, 764 flow [2024-06-21 20:30:16,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=77, PETRI_TRANSITIONS=98} [2024-06-21 20:30:16,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 20:30:16,133 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 98 transitions, 764 flow [2024-06-21 20:30:16,134 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 20:30:16,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:16,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:16,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:30:16,134 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 20:30:16,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash 297779230, now seen corresponding path program 3 times [2024-06-21 20:30:16,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:16,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332785956] [2024-06-21 20:30:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:16,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:17,046 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 20:30:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332785956] [2024-06-21 20:30:17,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332785956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:17,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:17,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078867352] [2024-06-21 20:30:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:17,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:17,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 764 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 20:30:17,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:17,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:17,740 INFO L124 PetriNetUnfolderBase]: 2033/3073 cut-off events. [2024-06-21 20:30:17,741 INFO L125 PetriNetUnfolderBase]: For 20435/20438 co-relation queries the response was YES. [2024-06-21 20:30:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13006 conditions, 3073 events. 2033/3073 cut-off events. For 20435/20438 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15146 event pairs, 740 based on Foata normal form. 7/3078 useless extension candidates. Maximal degree in co-relation 12976. Up to 2845 conditions per place. [2024-06-21 20:30:17,761 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 55 changer transitions 0/132 dead transitions. [2024-06-21 20:30:17,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 132 transitions, 1240 flow [2024-06-21 20:30:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:30:17,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:30:17,795 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 764 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:30:17,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 132 transitions, 1240 flow [2024-06-21 20:30:17,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 1201 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:17,811 INFO L231 Difference]: Finished difference. Result has 81 places, 107 transitions, 952 flow [2024-06-21 20:30:17,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=952, PETRI_PLACES=81, PETRI_TRANSITIONS=107} [2024-06-21 20:30:17,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 20:30:17,811 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 107 transitions, 952 flow [2024-06-21 20:30:17,812 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 20:30:17,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:17,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:17,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:30:17,812 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 20:30:17,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1995748686, now seen corresponding path program 4 times [2024-06-21 20:30:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27076360] [2024-06-21 20:30:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:18,657 INFO 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 20:30:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27076360] [2024-06-21 20:30:18,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27076360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:18,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:18,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245099131] [2024-06-21 20:30:18,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:18,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:18,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:18,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 107 transitions, 952 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 20:30:18,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:18,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:18,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:19,387 INFO L124 PetriNetUnfolderBase]: 2022/3061 cut-off events. [2024-06-21 20:30:19,387 INFO L125 PetriNetUnfolderBase]: For 23406/23411 co-relation queries the response was YES. [2024-06-21 20:30:19,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 3061 events. 2022/3061 cut-off events. For 23406/23411 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15031 event pairs, 744 based on Foata normal form. 8/3063 useless extension candidates. Maximal degree in co-relation 13301. Up to 2834 conditions per place. [2024-06-21 20:30:19,405 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 55 changer transitions 0/127 dead transitions. [2024-06-21 20:30:19,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 1264 flow [2024-06-21 20:30:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:30:19,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:30:19,407 INFO L175 Difference]: Start difference. First operand has 81 places, 107 transitions, 952 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:30:19,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 1264 flow [2024-06-21 20:30:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1107 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:19,428 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 920 flow [2024-06-21 20:30:19,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2024-06-21 20:30:19,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 20:30:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 920 flow [2024-06-21 20:30:19,429 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 20:30:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:19,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:19,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:30:19,430 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 20:30:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1274110517, now seen corresponding path program 2 times [2024-06-21 20:30:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834102822] [2024-06-21 20:30:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:20,340 INFO 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 20:30:20,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834102822] [2024-06-21 20:30:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834102822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457331182] [2024-06-21 20:30:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:20,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 920 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 20:30:20,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:20,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:20,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:21,193 INFO L124 PetriNetUnfolderBase]: 2044/3092 cut-off events. [2024-06-21 20:30:21,194 INFO L125 PetriNetUnfolderBase]: For 26515/26528 co-relation queries the response was YES. [2024-06-21 20:30:21,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13688 conditions, 3092 events. 2044/3092 cut-off events. For 26515/26528 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15184 event pairs, 701 based on Foata normal form. 14/3103 useless extension candidates. Maximal degree in co-relation 13655. Up to 2869 conditions per place. [2024-06-21 20:30:21,210 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-21 20:30:21,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1360 flow [2024-06-21 20:30:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:30:21,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:30:21,212 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 920 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:30:21,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1360 flow [2024-06-21 20:30:21,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 138 transitions, 1181 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:30:21,234 INFO L231 Difference]: Finished difference. Result has 83 places, 110 transitions, 850 flow [2024-06-21 20:30:21,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=83, PETRI_TRANSITIONS=110} [2024-06-21 20:30:21,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 20:30:21,235 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 110 transitions, 850 flow [2024-06-21 20:30:21,235 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 20:30:21,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:21,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:21,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:30:21,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:21,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:21,236 INFO L85 PathProgramCache]: Analyzing trace with hash 218316699, now seen corresponding path program 3 times [2024-06-21 20:30:21,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:21,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11517819] [2024-06-21 20:30:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:22,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:22,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11517819] [2024-06-21 20:30:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11517819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:22,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16477670] [2024-06-21 20:30:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:22,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:22,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 110 transitions, 850 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 20:30:22,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:22,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:22,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:22,903 INFO L124 PetriNetUnfolderBase]: 2034/3077 cut-off events. [2024-06-21 20:30:22,904 INFO L125 PetriNetUnfolderBase]: For 28960/28973 co-relation queries the response was YES. [2024-06-21 20:30:22,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 3077 events. 2034/3077 cut-off events. For 28960/28973 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15082 event pairs, 701 based on Foata normal form. 14/3088 useless extension candidates. Maximal degree in co-relation 13678. Up to 2861 conditions per place. [2024-06-21 20:30:22,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 94 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-06-21 20:30:22,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 134 transitions, 1188 flow [2024-06-21 20:30:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:30:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:30:22,918 INFO L175 Difference]: Start difference. First operand has 83 places, 110 transitions, 850 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:30:22,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 134 transitions, 1188 flow [2024-06-21 20:30:22,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 1082 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:22,941 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 822 flow [2024-06-21 20:30:22,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2024-06-21 20:30:22,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-21 20:30:22,942 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 822 flow [2024-06-21 20:30:22,942 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 20:30:22,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:22,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:22,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:30:22,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:22,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash -685239082, now seen corresponding path program 1 times [2024-06-21 20:30:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:22,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670806649] [2024-06-21 20:30:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670806649] [2024-06-21 20:30:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670806649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:23,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:23,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517245310] [2024-06-21 20:30:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:24,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:30:24,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 822 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:30:24,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:24,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:30:24,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:24,342 INFO L124 PetriNetUnfolderBase]: 1432/2444 cut-off events. [2024-06-21 20:30:24,343 INFO L125 PetriNetUnfolderBase]: For 26303/26321 co-relation queries the response was YES. [2024-06-21 20:30:24,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2444 events. 1432/2444 cut-off events. For 26303/26321 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13787 event pairs, 585 based on Foata normal form. 19/2462 useless extension candidates. Maximal degree in co-relation 10689. Up to 2059 conditions per place. [2024-06-21 20:30:24,356 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 69 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2024-06-21 20:30:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1020 flow [2024-06-21 20:30:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-21 20:30:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-21 20:30:24,359 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 822 flow. Second operand 5 states and 109 transitions. [2024-06-21 20:30:24,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1020 flow [2024-06-21 20:30:24,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 937 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:30:24,407 INFO L231 Difference]: Finished difference. Result has 84 places, 113 transitions, 787 flow [2024-06-21 20:30:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=787, PETRI_PLACES=84, PETRI_TRANSITIONS=113} [2024-06-21 20:30:24,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 20:30:24,408 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 113 transitions, 787 flow [2024-06-21 20:30:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:30:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:30:24,409 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 20:30:24,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -247806069, now seen corresponding path program 1 times [2024-06-21 20:30:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:24,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864568961] [2024-06-21 20:30:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:25,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:25,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864568961] [2024-06-21 20:30:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864568961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:25,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999241582] [2024-06-21 20:30:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:25,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:25,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 113 transitions, 787 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 20:30:25,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:25,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:25,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:26,234 INFO L124 PetriNetUnfolderBase]: 2042/3089 cut-off events. [2024-06-21 20:30:26,235 INFO L125 PetriNetUnfolderBase]: For 34752/34756 co-relation queries the response was YES. [2024-06-21 20:30:26,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14361 conditions, 3089 events. 2042/3089 cut-off events. For 34752/34756 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15184 event pairs, 707 based on Foata normal form. 6/3094 useless extension candidates. Maximal degree in co-relation 14326. Up to 2929 conditions per place. [2024-06-21 20:30:26,251 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2024-06-21 20:30:26,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1217 flow [2024-06-21 20:30:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:30:26,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:30:26,253 INFO L175 Difference]: Start difference. First operand has 84 places, 113 transitions, 787 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:30:26,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1217 flow [2024-06-21 20:30:26,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1191 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:26,274 INFO L231 Difference]: Finished difference. Result has 89 places, 116 transitions, 855 flow [2024-06-21 20:30:26,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=89, PETRI_TRANSITIONS=116} [2024-06-21 20:30:26,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-21 20:30:26,275 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 116 transitions, 855 flow [2024-06-21 20:30:26,275 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 20:30:26,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:26,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:30:26,276 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 20:30:26,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 636581575, now seen corresponding path program 1 times [2024-06-21 20:30:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197340947] [2024-06-21 20:30:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:27,195 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 20:30:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197340947] [2024-06-21 20:30:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197340947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:27,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:27,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102381031] [2024-06-21 20:30:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:27,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:27,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 116 transitions, 855 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 20:30:27,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:27,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:27,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:28,089 INFO L124 PetriNetUnfolderBase]: 2064/3122 cut-off events. [2024-06-21 20:30:28,089 INFO L125 PetriNetUnfolderBase]: For 39985/39989 co-relation queries the response was YES. [2024-06-21 20:30:28,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15185 conditions, 3122 events. 2064/3122 cut-off events. For 39985/39989 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15332 event pairs, 640 based on Foata normal form. 8/3125 useless extension candidates. Maximal degree in co-relation 15149. Up to 2710 conditions per place. [2024-06-21 20:30:28,107 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2024-06-21 20:30:28,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 158 transitions, 1399 flow [2024-06-21 20:30:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:30:28,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 20:30:28,110 INFO L175 Difference]: Start difference. First operand has 89 places, 116 transitions, 855 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:30:28,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 158 transitions, 1399 flow [2024-06-21 20:30:28,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1329 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:30:28,136 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 995 flow [2024-06-21 20:30:28,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=995, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-21 20:30:28,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-21 20:30:28,137 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 995 flow [2024-06-21 20:30:28,137 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 20:30:28,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:28,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:28,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:30:28,138 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 20:30:28,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1999484329, now seen corresponding path program 2 times [2024-06-21 20:30:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:28,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895501218] [2024-06-21 20:30:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:28,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:29,055 INFO 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 20:30:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895501218] [2024-06-21 20:30:29,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895501218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:29,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:29,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:29,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384198638] [2024-06-21 20:30:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:29,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:29,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:29,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:29,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 995 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 20:30:29,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:29,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:29,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:29,906 INFO L124 PetriNetUnfolderBase]: 2075/3145 cut-off events. [2024-06-21 20:30:29,906 INFO L125 PetriNetUnfolderBase]: For 45325/45332 co-relation queries the response was YES. [2024-06-21 20:30:29,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 3145 events. 2075/3145 cut-off events. For 45325/45332 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15561 event pairs, 691 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 15989. Up to 2827 conditions per place. [2024-06-21 20:30:29,922 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-21 20:30:29,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 161 transitions, 1561 flow [2024-06-21 20:30:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:30:29,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:30:29,924 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 995 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:30:29,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 161 transitions, 1561 flow [2024-06-21 20:30:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 161 transitions, 1484 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:29,951 INFO L231 Difference]: Finished difference. Result has 95 places, 128 transitions, 1136 flow [2024-06-21 20:30:29,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=95, PETRI_TRANSITIONS=128} [2024-06-21 20:30:29,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 20:30:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 1136 flow [2024-06-21 20:30:29,952 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 20:30:29,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:29,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:29,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:30:29,953 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 20:30:29,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1994842513, now seen corresponding path program 2 times [2024-06-21 20:30:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:29,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375603898] [2024-06-21 20:30:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:30,949 INFO 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 20:30:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:30,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375603898] [2024-06-21 20:30:30,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375603898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:30,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:30,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595959004] [2024-06-21 20:30:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:30,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:31,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:31,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 1136 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 20:30:31,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:31,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:31,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:31,820 INFO L124 PetriNetUnfolderBase]: 2129/3223 cut-off events. [2024-06-21 20:30:31,820 INFO L125 PetriNetUnfolderBase]: For 52372/52372 co-relation queries the response was YES. [2024-06-21 20:30:31,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17135 conditions, 3223 events. 2129/3223 cut-off events. For 52372/52372 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15938 event pairs, 647 based on Foata normal form. 4/3222 useless extension candidates. Maximal degree in co-relation 17096. Up to 2772 conditions per place. [2024-06-21 20:30:31,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 66 changer transitions 0/170 dead transitions. [2024-06-21 20:30:31,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 170 transitions, 1776 flow [2024-06-21 20:30:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 20:30:31,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:30:31,837 INFO L175 Difference]: Start difference. First operand has 95 places, 128 transitions, 1136 flow. Second operand 8 states and 168 transitions. [2024-06-21 20:30:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 170 transitions, 1776 flow [2024-06-21 20:30:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1695 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:31,865 INFO L231 Difference]: Finished difference. Result has 99 places, 134 transitions, 1261 flow [2024-06-21 20:30:31,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1261, PETRI_PLACES=99, PETRI_TRANSITIONS=134} [2024-06-21 20:30:31,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 20:30:31,866 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 134 transitions, 1261 flow [2024-06-21 20:30:31,866 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 20:30:31,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:31,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:30:31,866 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 20:30:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 641223019, now seen corresponding path program 3 times [2024-06-21 20:30:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611031343] [2024-06-21 20:30:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:32,751 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 20:30:32,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611031343] [2024-06-21 20:30:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611031343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:32,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790658348] [2024-06-21 20:30:32,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:32,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:32,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:32,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:32,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 1261 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 20:30:32,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:32,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:32,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:33,584 INFO L124 PetriNetUnfolderBase]: 2140/3244 cut-off events. [2024-06-21 20:30:33,584 INFO L125 PetriNetUnfolderBase]: For 57160/57163 co-relation queries the response was YES. [2024-06-21 20:30:33,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17726 conditions, 3244 events. 2140/3244 cut-off events. For 57160/57163 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16153 event pairs, 705 based on Foata normal form. 4/3246 useless extension candidates. Maximal degree in co-relation 17685. Up to 2917 conditions per place. [2024-06-21 20:30:33,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-21 20:30:33,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 167 transitions, 1795 flow [2024-06-21 20:30:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:30:33,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:30:33,604 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 1261 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:30:33,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 167 transitions, 1795 flow [2024-06-21 20:30:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 167 transitions, 1693 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:33,648 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1331 flow [2024-06-21 20:30:33,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-21 20:30:33,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-21 20:30:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1331 flow [2024-06-21 20:30:33,650 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 20:30:33,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:33,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:33,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:30:33,650 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 20:30:33,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1994836003, now seen corresponding path program 3 times [2024-06-21 20:30:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580064925] [2024-06-21 20:30:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:33,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:34,560 INFO 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 20:30:34,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580064925] [2024-06-21 20:30:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580064925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:34,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:34,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:34,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77253027] [2024-06-21 20:30:34,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:34,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:34,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1331 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 20:30:34,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:34,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:35,460 INFO L124 PetriNetUnfolderBase]: 2130/3230 cut-off events. [2024-06-21 20:30:35,460 INFO L125 PetriNetUnfolderBase]: For 61979/61979 co-relation queries the response was YES. [2024-06-21 20:30:35,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17800 conditions, 3230 events. 2130/3230 cut-off events. For 61979/61979 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16027 event pairs, 647 based on Foata normal form. 4/3229 useless extension candidates. Maximal degree in co-relation 17758. Up to 2780 conditions per place. [2024-06-21 20:30:35,478 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 69 changer transitions 0/169 dead transitions. [2024-06-21 20:30:35,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 1831 flow [2024-06-21 20:30:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:30:35,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:30:35,480 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1331 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:30:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 1831 flow [2024-06-21 20:30:35,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 1697 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:35,519 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1343 flow [2024-06-21 20:30:35,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1343, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-21 20:30:35,519 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-21 20:30:35,520 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1343 flow [2024-06-21 20:30:35,520 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 20:30:35,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:35,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:35,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:30:35,520 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 20:30:35,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1738658945, now seen corresponding path program 4 times [2024-06-21 20:30:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:35,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401912388] [2024-06-21 20:30:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:36,443 INFO 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 20:30:36,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:36,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401912388] [2024-06-21 20:30:36,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401912388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:36,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:36,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852225425] [2024-06-21 20:30:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:36,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:36,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1343 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 20:30:36,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:36,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:36,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:37,389 INFO L124 PetriNetUnfolderBase]: 2184/3316 cut-off events. [2024-06-21 20:30:37,389 INFO L125 PetriNetUnfolderBase]: For 69430/69435 co-relation queries the response was YES. [2024-06-21 20:30:37,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18581 conditions, 3316 events. 2184/3316 cut-off events. For 69430/69435 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16526 event pairs, 645 based on Foata normal form. 8/3318 useless extension candidates. Maximal degree in co-relation 18538. Up to 2826 conditions per place. [2024-06-21 20:30:37,409 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 72 changer transitions 0/176 dead transitions. [2024-06-21 20:30:37,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 176 transitions, 2029 flow [2024-06-21 20:30:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:30:37,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:30:37,411 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1343 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:30:37,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 176 transitions, 2029 flow [2024-06-21 20:30:37,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 176 transitions, 1864 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:30:37,452 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1412 flow [2024-06-21 20:30:37,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-21 20:30:37,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 20:30:37,453 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1412 flow [2024-06-21 20:30:37,453 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 20:30:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:30:37,454 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 20:30:37,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash 842715303, now seen corresponding path program 5 times [2024-06-21 20:30:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112261650] [2024-06-21 20:30:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:38,346 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 20:30:38,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112261650] [2024-06-21 20:30:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112261650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:38,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:38,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80088921] [2024-06-21 20:30:38,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:38,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:38,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:38,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1412 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 20:30:38,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:38,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:38,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:39,252 INFO L124 PetriNetUnfolderBase]: 2174/3302 cut-off events. [2024-06-21 20:30:39,252 INFO L125 PetriNetUnfolderBase]: For 73956/73961 co-relation queries the response was YES. [2024-06-21 20:30:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18668 conditions, 3302 events. 2174/3302 cut-off events. For 73956/73961 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16473 event pairs, 641 based on Foata normal form. 8/3304 useless extension candidates. Maximal degree in co-relation 18624. Up to 2818 conditions per place. [2024-06-21 20:30:39,268 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 73 changer transitions 0/175 dead transitions. [2024-06-21 20:30:39,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 175 transitions, 1938 flow [2024-06-21 20:30:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:30:39,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:30:39,269 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1412 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:30:39,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 175 transitions, 1938 flow [2024-06-21 20:30:39,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1754 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:39,316 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1384 flow [2024-06-21 20:30:39,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1384, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-21 20:30:39,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 20:30:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1384 flow [2024-06-21 20:30:39,316 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 20:30:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:30:39,317 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 20:30:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 116446645, now seen corresponding path program 4 times [2024-06-21 20:30:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157209117] [2024-06-21 20:30:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:40,210 INFO 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 20:30:40,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157209117] [2024-06-21 20:30:40,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157209117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:40,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:40,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348353137] [2024-06-21 20:30:40,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:40,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:40,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:40,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:40,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1384 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 20:30:40,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:40,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:40,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:41,052 INFO L124 PetriNetUnfolderBase]: 2169/3291 cut-off events. [2024-06-21 20:30:41,052 INFO L125 PetriNetUnfolderBase]: For 78042/78042 co-relation queries the response was YES. [2024-06-21 20:30:41,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18799 conditions, 3291 events. 2169/3291 cut-off events. For 78042/78042 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16411 event pairs, 719 based on Foata normal form. 2/3285 useless extension candidates. Maximal degree in co-relation 18754. Up to 2962 conditions per place. [2024-06-21 20:30:41,073 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-21 20:30:41,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 1788 flow [2024-06-21 20:30:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:30:41,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:30:41,075 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1384 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:30:41,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 1788 flow [2024-06-21 20:30:41,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1594 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:30:41,130 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1322 flow [2024-06-21 20:30:41,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-21 20:30:41,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-21 20:30:41,131 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1322 flow [2024-06-21 20:30:41,131 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 20:30:41,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:41,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:41,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:30:41,132 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:41,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash 124727551, now seen corresponding path program 6 times [2024-06-21 20:30:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:41,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140058919] [2024-06-21 20:30:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:41,951 INFO 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 20:30:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:41,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140058919] [2024-06-21 20:30:41,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140058919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:41,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:41,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923525891] [2024-06-21 20:30:41,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:42,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:42,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1322 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 20:30:42,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:42,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:42,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:42,893 INFO L124 PetriNetUnfolderBase]: 2159/3279 cut-off events. [2024-06-21 20:30:42,893 INFO L125 PetriNetUnfolderBase]: For 82970/82975 co-relation queries the response was YES. [2024-06-21 20:30:42,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18730 conditions, 3279 events. 2159/3279 cut-off events. For 82970/82975 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16298 event pairs, 648 based on Foata normal form. 8/3281 useless extension candidates. Maximal degree in co-relation 18684. Up to 2803 conditions per place. [2024-06-21 20:30:42,914 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 80 changer transitions 0/170 dead transitions. [2024-06-21 20:30:42,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 170 transitions, 1734 flow [2024-06-21 20:30:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:30:42,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:30:42,916 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1322 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:30:42,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 170 transitions, 1734 flow [2024-06-21 20:30:42,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 170 transitions, 1534 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:30:42,972 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1290 flow [2024-06-21 20:30:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-21 20:30:42,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-21 20:30:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1290 flow [2024-06-21 20:30:42,973 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 20:30:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:42,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:42,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:30:42,974 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 20:30:42,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash 125035381, now seen corresponding path program 1 times [2024-06-21 20:30:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719207598] [2024-06-21 20:30:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:44,156 INFO 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 20:30:44,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:44,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719207598] [2024-06-21 20:30:44,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719207598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:44,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:44,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:44,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648830111] [2024-06-21 20:30:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:30:44,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:44,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:44,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:30:44,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:44,975 INFO L124 PetriNetUnfolderBase]: 1767/2844 cut-off events. [2024-06-21 20:30:44,975 INFO L125 PetriNetUnfolderBase]: For 76001/76026 co-relation queries the response was YES. [2024-06-21 20:30:44,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16182 conditions, 2844 events. 1767/2844 cut-off events. For 76001/76026 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15163 event pairs, 548 based on Foata normal form. 29/2844 useless extension candidates. Maximal degree in co-relation 16135. Up to 2543 conditions per place. [2024-06-21 20:30:44,993 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 16 changer transitions 0/172 dead transitions. [2024-06-21 20:30:44,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 1729 flow [2024-06-21 20:30:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:30:44,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:30:44,995 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1290 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:30:44,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 1729 flow [2024-06-21 20:30:45,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1525 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:30:45,057 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1190 flow [2024-06-21 20:30:45,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-21 20:30:45,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 20:30:45,058 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1190 flow [2024-06-21 20:30:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:45,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:45,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:30:45,058 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:45,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 232426522, now seen corresponding path program 1 times [2024-06-21 20:30:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464901032] [2024-06-21 20:30:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464901032] [2024-06-21 20:30:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464901032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:46,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:46,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:46,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602532383] [2024-06-21 20:30:46,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:46,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:46,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:46,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:30:46,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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 20:30:46,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:46,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:30:46,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:46,754 INFO L124 PetriNetUnfolderBase]: 1496/2571 cut-off events. [2024-06-21 20:30:46,754 INFO L125 PetriNetUnfolderBase]: For 78241/78259 co-relation queries the response was YES. [2024-06-21 20:30:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 2571 events. 1496/2571 cut-off events. For 78241/78259 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14681 event pairs, 532 based on Foata normal form. 20/2586 useless extension candidates. Maximal degree in co-relation 14758. Up to 2112 conditions per place. [2024-06-21 20:30:46,772 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 96 selfloop transitions, 11 changer transitions 0/161 dead transitions. [2024-06-21 20:30:46,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 1458 flow [2024-06-21 20:30:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 20:30:46,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 20:30:46,773 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1190 flow. Second operand 6 states and 128 transitions. [2024-06-21 20:30:46,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 1458 flow [2024-06-21 20:30:46,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1399 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:46,825 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1191 flow [2024-06-21 20:30:46,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-21 20:30:46,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 20:30:46,826 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1191 flow [2024-06-21 20:30:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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 20:30:46,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:46,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:30:46,827 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 20:30:46,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 907948120, now seen corresponding path program 1 times [2024-06-21 20:30:46,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347033336] [2024-06-21 20:30:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:48,022 INFO 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 20:30:48,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347033336] [2024-06-21 20:30:48,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347033336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:48,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:48,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24841144] [2024-06-21 20:30:48,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:48,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:48,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:48,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1191 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 20:30:48,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:48,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:48,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:48,881 INFO L124 PetriNetUnfolderBase]: 2164/3290 cut-off events. [2024-06-21 20:30:48,881 INFO L125 PetriNetUnfolderBase]: For 99109/99113 co-relation queries the response was YES. [2024-06-21 20:30:48,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19648 conditions, 3290 events. 2164/3290 cut-off events. For 99109/99113 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16358 event pairs, 651 based on Foata normal form. 8/3297 useless extension candidates. Maximal degree in co-relation 19598. Up to 3090 conditions per place. [2024-06-21 20:30:48,901 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2024-06-21 20:30:48,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1735 flow [2024-06-21 20:30:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:30:48,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:30:48,902 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1191 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:30:48,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1735 flow [2024-06-21 20:30:48,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:48,957 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1265 flow [2024-06-21 20:30:48,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-21 20:30:48,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 20:30:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1265 flow [2024-06-21 20:30:48,959 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 20:30:48,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:48,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:30:48,959 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 20:30:48,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1874003080, now seen corresponding path program 2 times [2024-06-21 20:30:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:48,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668743186] [2024-06-21 20:30:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:49,986 INFO 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 20:30:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668743186] [2024-06-21 20:30:49,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668743186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:49,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:49,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811435976] [2024-06-21 20:30:49,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:49,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:49,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:50,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:50,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1265 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 20:30:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:50,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:50,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:51,017 INFO L124 PetriNetUnfolderBase]: 2218/3389 cut-off events. [2024-06-21 20:30:51,017 INFO L125 PetriNetUnfolderBase]: For 108818/108825 co-relation queries the response was YES. [2024-06-21 20:30:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20865 conditions, 3389 events. 2218/3389 cut-off events. For 108818/108825 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17119 event pairs, 596 based on Foata normal form. 8/3393 useless extension candidates. Maximal degree in co-relation 20814. Up to 2658 conditions per place. [2024-06-21 20:30:51,039 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 116 selfloop transitions, 86 changer transitions 0/207 dead transitions. [2024-06-21 20:30:51,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 207 transitions, 2179 flow [2024-06-21 20:30:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 20:30:51,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-21 20:30:51,040 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1265 flow. Second operand 9 states and 191 transitions. [2024-06-21 20:30:51,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 207 transitions, 2179 flow [2024-06-21 20:30:51,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 207 transitions, 2091 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:30:51,117 INFO L231 Difference]: Finished difference. Result has 120 places, 163 transitions, 1513 flow [2024-06-21 20:30:51,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1513, PETRI_PLACES=120, PETRI_TRANSITIONS=163} [2024-06-21 20:30:51,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-21 20:30:51,118 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 163 transitions, 1513 flow [2024-06-21 20:30:51,118 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 20:30:51,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:51,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:30:51,118 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 20:30:51,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1740806174, now seen corresponding path program 3 times [2024-06-21 20:30:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:51,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867770166] [2024-06-21 20:30:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:52,094 INFO 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 20:30:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867770166] [2024-06-21 20:30:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867770166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552915405] [2024-06-21 20:30:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:52,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:52,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:52,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:52,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 163 transitions, 1513 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 20:30:52,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:52,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:52,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:53,148 INFO L124 PetriNetUnfolderBase]: 2208/3375 cut-off events. [2024-06-21 20:30:53,149 INFO L125 PetriNetUnfolderBase]: For 116416/116423 co-relation queries the response was YES. [2024-06-21 20:30:53,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21400 conditions, 3375 events. 2208/3375 cut-off events. For 116416/116423 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17031 event pairs, 596 based on Foata normal form. 8/3379 useless extension candidates. Maximal degree in co-relation 21348. Up to 2650 conditions per place. [2024-06-21 20:30:53,169 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-06-21 20:30:53,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2159 flow [2024-06-21 20:30:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 20:30:53,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 20:30:53,171 INFO L175 Difference]: Start difference. First operand has 120 places, 163 transitions, 1513 flow. Second operand 9 states and 187 transitions. [2024-06-21 20:30:53,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2159 flow [2024-06-21 20:30:53,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 204 transitions, 2015 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:53,235 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1551 flow [2024-06-21 20:30:53,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1551, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-21 20:30:53,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 20:30:53,236 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1551 flow [2024-06-21 20:30:53,236 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 20:30:53,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:53,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:30:53,236 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 20:30:53,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1596915644, now seen corresponding path program 4 times [2024-06-21 20:30:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829101329] [2024-06-21 20:30:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:54,229 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 20:30:54,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829101329] [2024-06-21 20:30:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829101329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:54,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178679052] [2024-06-21 20:30:54,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:54,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:54,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1551 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 20:30:54,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:54,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:54,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:55,307 INFO L124 PetriNetUnfolderBase]: 2294/3524 cut-off events. [2024-06-21 20:30:55,307 INFO L125 PetriNetUnfolderBase]: For 128227/128230 co-relation queries the response was YES. [2024-06-21 20:30:55,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22870 conditions, 3524 events. 2294/3524 cut-off events. For 128227/128230 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17979 event pairs, 610 based on Foata normal form. 4/3524 useless extension candidates. Maximal degree in co-relation 22816. Up to 2723 conditions per place. [2024-06-21 20:30:55,331 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 120 selfloop transitions, 90 changer transitions 0/215 dead transitions. [2024-06-21 20:30:55,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 215 transitions, 2623 flow [2024-06-21 20:30:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 20:30:55,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 20:30:55,333 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1551 flow. Second operand 9 states and 192 transitions. [2024-06-21 20:30:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 215 transitions, 2623 flow [2024-06-21 20:30:55,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 215 transitions, 2421 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:30:55,409 INFO L231 Difference]: Finished difference. Result has 126 places, 172 transitions, 1705 flow [2024-06-21 20:30:55,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1705, PETRI_PLACES=126, PETRI_TRANSITIONS=172} [2024-06-21 20:30:55,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 20:30:55,409 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 172 transitions, 1705 flow [2024-06-21 20:30:55,410 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 20:30:55,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:55,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:55,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:30:55,410 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 20:30:55,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash 913454650, now seen corresponding path program 5 times [2024-06-21 20:30:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:55,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485478692] [2024-06-21 20:30:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:56,390 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 20:30:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485478692] [2024-06-21 20:30:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485478692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:56,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:56,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766859002] [2024-06-21 20:30:56,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:56,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:56,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:56,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 172 transitions, 1705 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 20:30:56,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:56,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:56,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:57,441 INFO L124 PetriNetUnfolderBase]: 2284/3510 cut-off events. [2024-06-21 20:30:57,442 INFO L125 PetriNetUnfolderBase]: For 133980/133983 co-relation queries the response was YES. [2024-06-21 20:30:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22866 conditions, 3510 events. 2284/3510 cut-off events. For 133980/133983 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17905 event pairs, 608 based on Foata normal form. 4/3510 useless extension candidates. Maximal degree in co-relation 22811. Up to 2715 conditions per place. [2024-06-21 20:30:57,465 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 91 changer transitions 0/213 dead transitions. [2024-06-21 20:30:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 213 transitions, 2493 flow [2024-06-21 20:30:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 20:30:57,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:30:57,467 INFO L175 Difference]: Start difference. First operand has 126 places, 172 transitions, 1705 flow. Second operand 9 states and 189 transitions. [2024-06-21 20:30:57,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 213 transitions, 2493 flow [2024-06-21 20:30:57,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 213 transitions, 2307 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:57,573 INFO L231 Difference]: Finished difference. Result has 131 places, 172 transitions, 1709 flow [2024-06-21 20:30:57,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1709, PETRI_PLACES=131, PETRI_TRANSITIONS=172} [2024-06-21 20:30:57,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 20:30:57,573 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 172 transitions, 1709 flow [2024-06-21 20:30:57,573 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 20:30:57,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:57,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:30:57,574 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 913662040, now seen corresponding path program 6 times [2024-06-21 20:30:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229383812] [2024-06-21 20:30:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:58,577 INFO 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 20:30:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229383812] [2024-06-21 20:30:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229383812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:58,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:58,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:30:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825804611] [2024-06-21 20:30:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:30:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:30:58,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:30:58,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:30:58,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 172 transitions, 1709 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 20:30:58,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:58,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:30:58,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:59,616 INFO L124 PetriNetUnfolderBase]: 2274/3496 cut-off events. [2024-06-21 20:30:59,616 INFO L125 PetriNetUnfolderBase]: For 139611/139614 co-relation queries the response was YES. [2024-06-21 20:30:59,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22806 conditions, 3496 events. 2274/3496 cut-off events. For 139611/139614 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17865 event pairs, 613 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 22750. Up to 2707 conditions per place. [2024-06-21 20:30:59,637 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 95 changer transitions 0/209 dead transitions. [2024-06-21 20:30:59,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 2359 flow [2024-06-21 20:30:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:30:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:30:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:30:59,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 20:30:59,639 INFO L175 Difference]: Start difference. First operand has 131 places, 172 transitions, 1709 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:30:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 2359 flow [2024-06-21 20:30:59,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2147 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:30:59,731 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1695 flow [2024-06-21 20:30:59,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1695, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-21 20:30:59,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 20:30:59,732 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1695 flow [2024-06-21 20:30:59,732 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 20:30:59,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:59,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:30:59,733 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:59,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1385172137, now seen corresponding path program 1 times [2024-06-21 20:30:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927867618] [2024-06-21 20:30:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:00,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927867618] [2024-06-21 20:31:00,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927867618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:00,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:00,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:00,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384992070] [2024-06-21 20:31:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:00,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:00,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1695 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 20:31:00,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:00,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:00,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:01,211 INFO L124 PetriNetUnfolderBase]: 1963/3164 cut-off events. [2024-06-21 20:31:01,211 INFO L125 PetriNetUnfolderBase]: For 144148/144152 co-relation queries the response was YES. [2024-06-21 20:31:01,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21323 conditions, 3164 events. 1963/3164 cut-off events. For 144148/144152 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17241 event pairs, 609 based on Foata normal form. 5/3154 useless extension candidates. Maximal degree in co-relation 21266. Up to 2782 conditions per place. [2024-06-21 20:31:01,233 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-21 20:31:01,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2071 flow [2024-06-21 20:31:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 20:31:01,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:31:01,234 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1695 flow. Second operand 6 states and 123 transitions. [2024-06-21 20:31:01,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2071 flow [2024-06-21 20:31:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 1850 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:31:01,322 INFO L231 Difference]: Finished difference. Result has 130 places, 175 transitions, 1539 flow [2024-06-21 20:31:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1539, PETRI_PLACES=130, PETRI_TRANSITIONS=175} [2024-06-21 20:31:01,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 20:31:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 175 transitions, 1539 flow [2024-06-21 20:31:01,322 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 20:31:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:31:01,323 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 20:31:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 354573908, now seen corresponding path program 7 times [2024-06-21 20:31:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888174282] [2024-06-21 20:31:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888174282] [2024-06-21 20:31:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888174282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333793263] [2024-06-21 20:31:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:02,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:02,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:02,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 175 transitions, 1539 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 20:31:02,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:02,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:02,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:03,276 INFO L124 PetriNetUnfolderBase]: 2333/3600 cut-off events. [2024-06-21 20:31:03,277 INFO L125 PetriNetUnfolderBase]: For 156901/156901 co-relation queries the response was YES. [2024-06-21 20:31:03,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23789 conditions, 3600 events. 2333/3600 cut-off events. For 156901/156901 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18583 event pairs, 622 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 23731. Up to 2760 conditions per place. [2024-06-21 20:31:03,303 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 96 changer transitions 0/219 dead transitions. [2024-06-21 20:31:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 219 transitions, 2455 flow [2024-06-21 20:31:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 20:31:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:31:03,304 INFO L175 Difference]: Start difference. First operand has 130 places, 175 transitions, 1539 flow. Second operand 9 states and 186 transitions. [2024-06-21 20:31:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 219 transitions, 2455 flow [2024-06-21 20:31:03,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 219 transitions, 2414 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:03,426 INFO L231 Difference]: Finished difference. Result has 135 places, 181 transitions, 1804 flow [2024-06-21 20:31:03,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1804, PETRI_PLACES=135, PETRI_TRANSITIONS=181} [2024-06-21 20:31:03,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 20:31:03,427 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 181 transitions, 1804 flow [2024-06-21 20:31:03,427 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 20:31:03,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:03,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:31:03,428 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 20:31:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 354372098, now seen corresponding path program 8 times [2024-06-21 20:31:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:03,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91710899] [2024-06-21 20:31:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:04,422 INFO 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 20:31:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91710899] [2024-06-21 20:31:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91710899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:04,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492938522] [2024-06-21 20:31:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:04,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 181 transitions, 1804 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 20:31:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:05,488 INFO L124 PetriNetUnfolderBase]: 2355/3637 cut-off events. [2024-06-21 20:31:05,488 INFO L125 PetriNetUnfolderBase]: For 167416/167416 co-relation queries the response was YES. [2024-06-21 20:31:05,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24666 conditions, 3637 events. 2355/3637 cut-off events. For 167416/167416 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18822 event pairs, 615 based on Foata normal form. 4/3633 useless extension candidates. Maximal degree in co-relation 24607. Up to 2779 conditions per place. [2024-06-21 20:31:05,515 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 100 changer transitions 0/223 dead transitions. [2024-06-21 20:31:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 223 transitions, 2695 flow [2024-06-21 20:31:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:31:05,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 20:31:05,516 INFO L175 Difference]: Start difference. First operand has 135 places, 181 transitions, 1804 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:31:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 223 transitions, 2695 flow [2024-06-21 20:31:05,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 223 transitions, 2447 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:05,612 INFO L231 Difference]: Finished difference. Result has 138 places, 184 transitions, 1823 flow [2024-06-21 20:31:05,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1823, PETRI_PLACES=138, PETRI_TRANSITIONS=184} [2024-06-21 20:31:05,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 20:31:05,613 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 184 transitions, 1823 flow [2024-06-21 20:31:05,613 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 20:31:05,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:05,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:05,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:31:05,614 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 20:31:05,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash 354366518, now seen corresponding path program 9 times [2024-06-21 20:31:05,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:05,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743940923] [2024-06-21 20:31:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:05,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:06,527 INFO 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 20:31:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743940923] [2024-06-21 20:31:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743940923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382704209] [2024-06-21 20:31:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:06,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 184 transitions, 1823 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 20:31:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:06,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:07,646 INFO L124 PetriNetUnfolderBase]: 2345/3623 cut-off events. [2024-06-21 20:31:07,647 INFO L125 PetriNetUnfolderBase]: For 172635/172635 co-relation queries the response was YES. [2024-06-21 20:31:07,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24605 conditions, 3623 events. 2345/3623 cut-off events. For 172635/172635 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18743 event pairs, 613 based on Foata normal form. 4/3619 useless extension candidates. Maximal degree in co-relation 24545. Up to 2771 conditions per place. [2024-06-21 20:31:07,671 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-21 20:31:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2517 flow [2024-06-21 20:31:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:31:07,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 20:31:07,673 INFO L175 Difference]: Start difference. First operand has 138 places, 184 transitions, 1823 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:31:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2517 flow [2024-06-21 20:31:07,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 221 transitions, 2219 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:07,767 INFO L231 Difference]: Finished difference. Result has 140 places, 184 transitions, 1737 flow [2024-06-21 20:31:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=140, PETRI_TRANSITIONS=184} [2024-06-21 20:31:07,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-21 20:31:07,767 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 184 transitions, 1737 flow [2024-06-21 20:31:07,767 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 20:31:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:31:07,768 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 20:31:07,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 611074418, now seen corresponding path program 10 times [2024-06-21 20:31:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:07,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251825739] [2024-06-21 20:31:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:08,664 INFO 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 20:31:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251825739] [2024-06-21 20:31:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251825739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137577869] [2024-06-21 20:31:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:08,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:08,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:08,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 184 transitions, 1737 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 20:31:08,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:08,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:08,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:09,635 INFO L124 PetriNetUnfolderBase]: 2335/3609 cut-off events. [2024-06-21 20:31:09,635 INFO L125 PetriNetUnfolderBase]: For 177508/177508 co-relation queries the response was YES. [2024-06-21 20:31:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24466 conditions, 3609 events. 2335/3609 cut-off events. For 177508/177508 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18645 event pairs, 630 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 24405. Up to 2763 conditions per place. [2024-06-21 20:31:09,660 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 110 changer transitions 0/216 dead transitions. [2024-06-21 20:31:09,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 216 transitions, 2263 flow [2024-06-21 20:31:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:31:09,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:31:09,662 INFO L175 Difference]: Start difference. First operand has 140 places, 184 transitions, 1737 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:31:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 216 transitions, 2263 flow [2024-06-21 20:31:09,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 216 transitions, 2033 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:09,766 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1735 flow [2024-06-21 20:31:09,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-21 20:31:09,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 20:31:09,767 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1735 flow [2024-06-21 20:31:09,767 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 20:31:09,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:09,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:31:09,768 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:09,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash -27150797, now seen corresponding path program 2 times [2024-06-21 20:31:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458315757] [2024-06-21 20:31:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458315757] [2024-06-21 20:31:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458315757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685186380] [2024-06-21 20:31:10,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:10,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:10,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1735 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 20:31:10,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:10,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:10,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:11,322 INFO L124 PetriNetUnfolderBase]: 1991/3234 cut-off events. [2024-06-21 20:31:11,322 INFO L125 PetriNetUnfolderBase]: For 181883/181896 co-relation queries the response was YES. [2024-06-21 20:31:11,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22808 conditions, 3234 events. 1991/3234 cut-off events. For 181883/181896 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17802 event pairs, 612 based on Foata normal form. 11/3221 useless extension candidates. Maximal degree in co-relation 22746. Up to 2824 conditions per place. [2024-06-21 20:31:11,349 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 137 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-21 20:31:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2115 flow [2024-06-21 20:31:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:31:11,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:31:11,350 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1735 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:31:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2115 flow [2024-06-21 20:31:11,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1831 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:31:11,475 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 1531 flow [2024-06-21 20:31:11,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-21 20:31:11,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 20:31:11,475 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 1531 flow [2024-06-21 20:31:11,476 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 20:31:11,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:11,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:11,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:31:11,476 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:11,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -189258275, now seen corresponding path program 1 times [2024-06-21 20:31:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:11,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305796161] [2024-06-21 20:31:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:12,299 INFO 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 20:31:12,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:12,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305796161] [2024-06-21 20:31:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305796161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:12,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957125519] [2024-06-21 20:31:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:12,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:12,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 1531 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 20:31:12,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:12,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:12,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:12,922 INFO L124 PetriNetUnfolderBase]: 1972/3209 cut-off events. [2024-06-21 20:31:12,923 INFO L125 PetriNetUnfolderBase]: For 163391/163416 co-relation queries the response was YES. [2024-06-21 20:31:12,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21282 conditions, 3209 events. 1972/3209 cut-off events. For 163391/163416 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17672 event pairs, 563 based on Foata normal form. 26/3213 useless extension candidates. Maximal degree in co-relation 21219. Up to 2851 conditions per place. [2024-06-21 20:31:12,950 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 173 selfloop transitions, 11 changer transitions 0/202 dead transitions. [2024-06-21 20:31:12,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 1969 flow [2024-06-21 20:31:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:31:12,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:31:12,952 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 1531 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:31:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 1969 flow [2024-06-21 20:31:13,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1911 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:13,068 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1541 flow [2024-06-21 20:31:13,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-21 20:31:13,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-21 20:31:13,069 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1541 flow [2024-06-21 20:31:13,069 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 20:31:13,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:13,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:13,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:31:13,070 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 20:31:13,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -189078785, now seen corresponding path program 2 times [2024-06-21 20:31:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:13,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234101960] [2024-06-21 20:31:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:13,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:13,969 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 20:31:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:13,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234101960] [2024-06-21 20:31:13,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234101960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:13,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:13,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:13,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325761825] [2024-06-21 20:31:13,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:13,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:14,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:14,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1541 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 20:31:14,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:14,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:14,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:14,542 INFO L124 PetriNetUnfolderBase]: 1963/3190 cut-off events. [2024-06-21 20:31:14,542 INFO L125 PetriNetUnfolderBase]: For 170139/170176 co-relation queries the response was YES. [2024-06-21 20:31:14,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21604 conditions, 3190 events. 1963/3190 cut-off events. For 170139/170176 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17562 event pairs, 881 based on Foata normal form. 37/3209 useless extension candidates. Maximal degree in co-relation 21540. Up to 2841 conditions per place. [2024-06-21 20:31:14,625 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 18 changer transitions 0/203 dead transitions. [2024-06-21 20:31:14,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 203 transitions, 1987 flow [2024-06-21 20:31:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:31:14,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 20:31:14,626 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1541 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:31:14,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 203 transitions, 1987 flow [2024-06-21 20:31:14,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 203 transitions, 1939 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:14,743 INFO L231 Difference]: Finished difference. Result has 144 places, 195 transitions, 1600 flow [2024-06-21 20:31:14,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1600, PETRI_PLACES=144, PETRI_TRANSITIONS=195} [2024-06-21 20:31:14,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 20:31:14,744 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 195 transitions, 1600 flow [2024-06-21 20:31:14,745 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 20:31:14,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:14,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:31:14,745 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:14,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -235530566, now seen corresponding path program 1 times [2024-06-21 20:31:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:14,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571899646] [2024-06-21 20:31:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:15,640 INFO 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 20:31:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571899646] [2024-06-21 20:31:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571899646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:15,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:15,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075760719] [2024-06-21 20:31:15,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:15,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:15,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:15,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 195 transitions, 1600 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 20:31:15,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:15,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:15,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:16,629 INFO L124 PetriNetUnfolderBase]: 2436/3774 cut-off events. [2024-06-21 20:31:16,629 INFO L125 PetriNetUnfolderBase]: For 213825/213831 co-relation queries the response was YES. [2024-06-21 20:31:16,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26651 conditions, 3774 events. 2436/3774 cut-off events. For 213825/213831 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19840 event pairs, 902 based on Foata normal form. 10/3783 useless extension candidates. Maximal degree in co-relation 26585. Up to 3430 conditions per place. [2024-06-21 20:31:16,663 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 215 selfloop transitions, 43 changer transitions 0/263 dead transitions. [2024-06-21 20:31:16,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 263 transitions, 2624 flow [2024-06-21 20:31:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:31:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:31:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:31:16,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 20:31:16,664 INFO L175 Difference]: Start difference. First operand has 144 places, 195 transitions, 1600 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:31:16,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 263 transitions, 2624 flow [2024-06-21 20:31:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 263 transitions, 2565 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:16,819 INFO L231 Difference]: Finished difference. Result has 156 places, 218 transitions, 1914 flow [2024-06-21 20:31:16,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1914, PETRI_PLACES=156, PETRI_TRANSITIONS=218} [2024-06-21 20:31:16,819 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 20:31:16,820 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 218 transitions, 1914 flow [2024-06-21 20:31:16,820 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 20:31:16,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:16,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:31:16,820 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 20:31:16,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1415308230, now seen corresponding path program 2 times [2024-06-21 20:31:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987439145] [2024-06-21 20:31:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:17,600 INFO 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 20:31:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987439145] [2024-06-21 20:31:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987439145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:17,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647299441] [2024-06-21 20:31:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:17,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:17,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 218 transitions, 1914 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 20:31:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:18,651 INFO L124 PetriNetUnfolderBase]: 2559/3976 cut-off events. [2024-06-21 20:31:18,652 INFO L125 PetriNetUnfolderBase]: For 237873/237879 co-relation queries the response was YES. [2024-06-21 20:31:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28937 conditions, 3976 events. 2559/3976 cut-off events. For 237873/237879 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21221 event pairs, 866 based on Foata normal form. 10/3985 useless extension candidates. Maximal degree in co-relation 28865. Up to 3559 conditions per place. [2024-06-21 20:31:18,687 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 63 changer transitions 0/291 dead transitions. [2024-06-21 20:31:18,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 291 transitions, 3145 flow [2024-06-21 20:31:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:31:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:31:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-21 20:31:18,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-21 20:31:18,689 INFO L175 Difference]: Start difference. First operand has 156 places, 218 transitions, 1914 flow. Second operand 12 states and 230 transitions. [2024-06-21 20:31:18,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 291 transitions, 3145 flow [2024-06-21 20:31:18,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 291 transitions, 3005 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:18,883 INFO L231 Difference]: Finished difference. Result has 168 places, 242 transitions, 2311 flow [2024-06-21 20:31:18,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2311, PETRI_PLACES=168, PETRI_TRANSITIONS=242} [2024-06-21 20:31:18,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 20:31:18,883 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 242 transitions, 2311 flow [2024-06-21 20:31:18,883 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 20:31:18,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:18,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:31:18,884 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -656795330, now seen corresponding path program 3 times [2024-06-21 20:31:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062523753] [2024-06-21 20:31:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:19,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062523753] [2024-06-21 20:31:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062523753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:19,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038879533] [2024-06-21 20:31:19,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:19,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:19,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 242 transitions, 2311 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 20:31:19,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:19,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:19,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:20,794 INFO L124 PetriNetUnfolderBase]: 2592/4032 cut-off events. [2024-06-21 20:31:20,795 INFO L125 PetriNetUnfolderBase]: For 246575/246579 co-relation queries the response was YES. [2024-06-21 20:31:20,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29969 conditions, 4032 events. 2592/4032 cut-off events. For 246575/246579 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21678 event pairs, 910 based on Foata normal form. 10/4041 useless extension candidates. Maximal degree in co-relation 29892. Up to 3681 conditions per place. [2024-06-21 20:31:20,833 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 229 selfloop transitions, 61 changer transitions 0/295 dead transitions. [2024-06-21 20:31:20,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 295 transitions, 3227 flow [2024-06-21 20:31:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:31:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:31:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-21 20:31:20,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:31:20,836 INFO L175 Difference]: Start difference. First operand has 168 places, 242 transitions, 2311 flow. Second operand 12 states and 224 transitions. [2024-06-21 20:31:20,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 295 transitions, 3227 flow [2024-06-21 20:31:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 295 transitions, 3071 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:21,070 INFO L231 Difference]: Finished difference. Result has 174 places, 252 transitions, 2463 flow [2024-06-21 20:31:21,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2463, PETRI_PLACES=174, PETRI_TRANSITIONS=252} [2024-06-21 20:31:21,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-21 20:31:21,071 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 252 transitions, 2463 flow [2024-06-21 20:31:21,071 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 20:31:21,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:21,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:21,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:31:21,072 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 20:31:21,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1281126198, now seen corresponding path program 4 times [2024-06-21 20:31:21,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:21,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822996732] [2024-06-21 20:31:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:21,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822996732] [2024-06-21 20:31:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822996732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:21,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:21,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173694938] [2024-06-21 20:31:21,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:21,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:21,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 252 transitions, 2463 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 20:31:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:22,836 INFO L124 PetriNetUnfolderBase]: 2761/4297 cut-off events. [2024-06-21 20:31:22,836 INFO L125 PetriNetUnfolderBase]: For 269352/269356 co-relation queries the response was YES. [2024-06-21 20:31:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32173 conditions, 4297 events. 2761/4297 cut-off events. For 269352/269356 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23459 event pairs, 720 based on Foata normal form. 8/4304 useless extension candidates. Maximal degree in co-relation 32094. Up to 3597 conditions per place. [2024-06-21 20:31:22,877 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 220 selfloop transitions, 99 changer transitions 0/324 dead transitions. [2024-06-21 20:31:22,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 324 transitions, 3909 flow [2024-06-21 20:31:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:31:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:31:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:31:22,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 20:31:22,878 INFO L175 Difference]: Start difference. First operand has 174 places, 252 transitions, 2463 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:31:22,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 324 transitions, 3909 flow [2024-06-21 20:31:23,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 324 transitions, 3713 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 20:31:23,193 INFO L231 Difference]: Finished difference. Result has 178 places, 277 transitions, 2916 flow [2024-06-21 20:31:23,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2916, PETRI_PLACES=178, PETRI_TRANSITIONS=277} [2024-06-21 20:31:23,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 20:31:23,194 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 277 transitions, 2916 flow [2024-06-21 20:31:23,194 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 20:31:23,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:23,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:31:23,194 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 20:31:23,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1403439896, now seen corresponding path program 5 times [2024-06-21 20:31:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193053980] [2024-06-21 20:31:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193053980] [2024-06-21 20:31:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193053980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:24,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:24,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:24,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801194580] [2024-06-21 20:31:24,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:24,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:24,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:24,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 277 transitions, 2916 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 20:31:24,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:24,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:25,084 INFO L124 PetriNetUnfolderBase]: 2743/4279 cut-off events. [2024-06-21 20:31:25,085 INFO L125 PetriNetUnfolderBase]: For 279996/280000 co-relation queries the response was YES. [2024-06-21 20:31:25,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32503 conditions, 4279 events. 2743/4279 cut-off events. For 279996/280000 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23405 event pairs, 953 based on Foata normal form. 12/4290 useless extension candidates. Maximal degree in co-relation 32421. Up to 3921 conditions per place. [2024-06-21 20:31:25,127 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 253 selfloop transitions, 55 changer transitions 0/313 dead transitions. [2024-06-21 20:31:25,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 313 transitions, 3679 flow [2024-06-21 20:31:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 20:31:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 20:31:25,129 INFO L175 Difference]: Start difference. First operand has 178 places, 277 transitions, 2916 flow. Second operand 10 states and 192 transitions. [2024-06-21 20:31:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 313 transitions, 3679 flow [2024-06-21 20:31:25,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 313 transitions, 3428 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:25,387 INFO L231 Difference]: Finished difference. Result has 181 places, 277 transitions, 2798 flow [2024-06-21 20:31:25,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2798, PETRI_PLACES=181, PETRI_TRANSITIONS=277} [2024-06-21 20:31:25,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 20:31:25,387 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 277 transitions, 2798 flow [2024-06-21 20:31:25,387 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 20:31:25,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:25,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:25,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:31:25,388 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 20:31:25,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:25,388 INFO L85 PathProgramCache]: Analyzing trace with hash -193490042, now seen corresponding path program 6 times [2024-06-21 20:31:25,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466883388] [2024-06-21 20:31:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:26,226 INFO 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 20:31:26,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466883388] [2024-06-21 20:31:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466883388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:26,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:26,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115693324] [2024-06-21 20:31:26,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:26,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:26,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:26,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:26,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:26,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 277 transitions, 2798 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 20:31:26,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:26,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:26,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:27,291 INFO L124 PetriNetUnfolderBase]: 2820/4394 cut-off events. [2024-06-21 20:31:27,291 INFO L125 PetriNetUnfolderBase]: For 278425/278430 co-relation queries the response was YES. [2024-06-21 20:31:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32747 conditions, 4394 events. 2820/4394 cut-off events. For 278425/278430 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24148 event pairs, 873 based on Foata normal form. 8/4400 useless extension candidates. Maximal degree in co-relation 32664. Up to 3856 conditions per place. [2024-06-21 20:31:27,333 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 218 selfloop transitions, 118 changer transitions 0/341 dead transitions. [2024-06-21 20:31:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 341 transitions, 3889 flow [2024-06-21 20:31:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:31:27,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:31:27,335 INFO L175 Difference]: Start difference. First operand has 181 places, 277 transitions, 2798 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:31:27,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 341 transitions, 3889 flow [2024-06-21 20:31:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 341 transitions, 3784 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:27,728 INFO L231 Difference]: Finished difference. Result has 185 places, 304 transitions, 3263 flow [2024-06-21 20:31:27,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3263, PETRI_PLACES=185, PETRI_TRANSITIONS=304} [2024-06-21 20:31:27,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-21 20:31:27,729 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 304 transitions, 3263 flow [2024-06-21 20:31:27,729 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 20:31:27,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:27,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:27,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:31:27,729 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1118386383, now seen corresponding path program 1 times [2024-06-21 20:31:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523753170] [2024-06-21 20:31:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:28,473 INFO 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 20:31:28,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:28,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523753170] [2024-06-21 20:31:28,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523753170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:28,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:28,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793656031] [2024-06-21 20:31:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:28,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:28,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:28,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 304 transitions, 3263 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 20:31:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:28,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:28,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:29,363 INFO L124 PetriNetUnfolderBase]: 2450/3989 cut-off events. [2024-06-21 20:31:29,364 INFO L125 PetriNetUnfolderBase]: For 297575/297605 co-relation queries the response was YES. [2024-06-21 20:31:29,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30823 conditions, 3989 events. 2450/3989 cut-off events. For 297575/297605 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23484 event pairs, 910 based on Foata normal form. 14/3964 useless extension candidates. Maximal degree in co-relation 30737. Up to 3388 conditions per place. [2024-06-21 20:31:29,402 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 213 selfloop transitions, 39 changer transitions 0/331 dead transitions. [2024-06-21 20:31:29,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 331 transitions, 3917 flow [2024-06-21 20:31:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:29,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 20:31:29,403 INFO L175 Difference]: Start difference. First operand has 185 places, 304 transitions, 3263 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:29,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 331 transitions, 3917 flow [2024-06-21 20:31:29,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 331 transitions, 3735 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:29,699 INFO L231 Difference]: Finished difference. Result has 189 places, 307 transitions, 3217 flow [2024-06-21 20:31:29,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=189, PETRI_TRANSITIONS=307} [2024-06-21 20:31:29,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 20:31:29,699 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 307 transitions, 3217 flow [2024-06-21 20:31:29,699 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 20:31:29,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:29,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:29,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:31:29,700 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 20:31:29,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1632851684, now seen corresponding path program 7 times [2024-06-21 20:31:29,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10262760] [2024-06-21 20:31:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:30,601 INFO 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 20:31:30,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:30,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10262760] [2024-06-21 20:31:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10262760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:30,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647166928] [2024-06-21 20:31:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:30,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:30,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 307 transitions, 3217 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 20:31:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:31,885 INFO L124 PetriNetUnfolderBase]: 3079/4806 cut-off events. [2024-06-21 20:31:31,886 INFO L125 PetriNetUnfolderBase]: For 315913/315915 co-relation queries the response was YES. [2024-06-21 20:31:31,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36891 conditions, 4806 events. 3079/4806 cut-off events. For 315913/315915 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26953 event pairs, 717 based on Foata normal form. 8/4813 useless extension candidates. Maximal degree in co-relation 36804. Up to 4275 conditions per place. [2024-06-21 20:31:31,932 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 307 selfloop transitions, 88 changer transitions 0/400 dead transitions. [2024-06-21 20:31:31,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 400 transitions, 5089 flow [2024-06-21 20:31:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:31:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:31:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:31:31,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 20:31:31,934 INFO L175 Difference]: Start difference. First operand has 189 places, 307 transitions, 3217 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:31:31,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 400 transitions, 5089 flow [2024-06-21 20:31:32,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 400 transitions, 4963 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:32,356 INFO L231 Difference]: Finished difference. Result has 197 places, 359 transitions, 4172 flow [2024-06-21 20:31:32,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4172, PETRI_PLACES=197, PETRI_TRANSITIONS=359} [2024-06-21 20:31:32,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-21 20:31:32,356 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 359 transitions, 4172 flow [2024-06-21 20:31:32,357 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 20:31:32,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:32,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:31:32,357 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 20:31:32,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1745936518, now seen corresponding path program 8 times [2024-06-21 20:31:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:32,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235333802] [2024-06-21 20:31:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:32,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235333802] [2024-06-21 20:31:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235333802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896245579] [2024-06-21 20:31:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:33,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:33,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 359 transitions, 4172 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 20:31:33,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:33,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:33,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:34,451 INFO L124 PetriNetUnfolderBase]: 3061/4784 cut-off events. [2024-06-21 20:31:34,451 INFO L125 PetriNetUnfolderBase]: For 323895/323897 co-relation queries the response was YES. [2024-06-21 20:31:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37152 conditions, 4784 events. 3061/4784 cut-off events. For 323895/323897 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26844 event pairs, 746 based on Foata normal form. 10/4793 useless extension candidates. Maximal degree in co-relation 37061. Up to 4379 conditions per place. [2024-06-21 20:31:34,502 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 317 selfloop transitions, 70 changer transitions 0/392 dead transitions. [2024-06-21 20:31:34,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 392 transitions, 5070 flow [2024-06-21 20:31:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 20:31:34,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 20:31:34,503 INFO L175 Difference]: Start difference. First operand has 197 places, 359 transitions, 4172 flow. Second operand 10 states and 192 transitions. [2024-06-21 20:31:34,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 392 transitions, 5070 flow [2024-06-21 20:31:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 392 transitions, 4918 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:34,879 INFO L231 Difference]: Finished difference. Result has 204 places, 359 transitions, 4178 flow [2024-06-21 20:31:34,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4020, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4178, PETRI_PLACES=204, PETRI_TRANSITIONS=359} [2024-06-21 20:31:34,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 20:31:34,880 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 359 transitions, 4178 flow [2024-06-21 20:31:34,880 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 20:31:34,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:34,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:31:34,881 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:34,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1750999814, now seen corresponding path program 9 times [2024-06-21 20:31:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400742481] [2024-06-21 20:31:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:35,797 INFO 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 20:31:35,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400742481] [2024-06-21 20:31:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400742481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:35,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957254352] [2024-06-21 20:31:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:35,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:35,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 359 transitions, 4178 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 20:31:35,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:35,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:35,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:37,042 INFO L124 PetriNetUnfolderBase]: 3139/4920 cut-off events. [2024-06-21 20:31:37,042 INFO L125 PetriNetUnfolderBase]: For 331582/331587 co-relation queries the response was YES. [2024-06-21 20:31:37,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37989 conditions, 4920 events. 3139/4920 cut-off events. For 331582/331587 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27963 event pairs, 758 based on Foata normal form. 8/4926 useless extension candidates. Maximal degree in co-relation 37897. Up to 4282 conditions per place. [2024-06-21 20:31:37,097 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 256 selfloop transitions, 155 changer transitions 0/416 dead transitions. [2024-06-21 20:31:37,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 416 transitions, 5374 flow [2024-06-21 20:31:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 20:31:37,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 20:31:37,099 INFO L175 Difference]: Start difference. First operand has 204 places, 359 transitions, 4178 flow. Second operand 10 states and 197 transitions. [2024-06-21 20:31:37,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 416 transitions, 5374 flow [2024-06-21 20:31:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 416 transitions, 5242 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:37,520 INFO L231 Difference]: Finished difference. Result has 207 places, 383 transitions, 4646 flow [2024-06-21 20:31:37,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4646, PETRI_PLACES=207, PETRI_TRANSITIONS=383} [2024-06-21 20:31:37,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 20:31:37,521 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 383 transitions, 4646 flow [2024-06-21 20:31:37,521 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 20:31:37,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:37,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:31:37,522 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 20:31:37,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash 61526662, now seen corresponding path program 10 times [2024-06-21 20:31:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:37,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829881339] [2024-06-21 20:31:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:38,503 INFO 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 20:31:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829881339] [2024-06-21 20:31:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829881339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:38,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287302089] [2024-06-21 20:31:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:38,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:38,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 383 transitions, 4646 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 20:31:38,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:38,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:38,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:39,717 INFO L124 PetriNetUnfolderBase]: 3177/4980 cut-off events. [2024-06-21 20:31:39,717 INFO L125 PetriNetUnfolderBase]: For 346787/346790 co-relation queries the response was YES. [2024-06-21 20:31:39,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39272 conditions, 4980 events. 3177/4980 cut-off events. For 346787/346790 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28378 event pairs, 747 based on Foata normal form. 6/4984 useless extension candidates. Maximal degree in co-relation 39178. Up to 4337 conditions per place. [2024-06-21 20:31:39,766 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 260 selfloop transitions, 162 changer transitions 0/427 dead transitions. [2024-06-21 20:31:39,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 427 transitions, 5818 flow [2024-06-21 20:31:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:31:39,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:31:39,768 INFO L175 Difference]: Start difference. First operand has 207 places, 383 transitions, 4646 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:31:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 427 transitions, 5818 flow [2024-06-21 20:31:40,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 427 transitions, 5562 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:40,132 INFO L231 Difference]: Finished difference. Result has 214 places, 394 transitions, 4961 flow [2024-06-21 20:31:40,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4961, PETRI_PLACES=214, PETRI_TRANSITIONS=394} [2024-06-21 20:31:40,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-21 20:31:40,133 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 394 transitions, 4961 flow [2024-06-21 20:31:40,133 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 20:31:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:31:40,134 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 20:31:40,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1946661678, now seen corresponding path program 1 times [2024-06-21 20:31:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:40,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087683796] [2024-06-21 20:31:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:40,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:41,199 INFO 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 20:31:41,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:41,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087683796] [2024-06-21 20:31:41,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087683796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:41,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:41,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:41,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313561549] [2024-06-21 20:31:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:41,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:41,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:41,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:41,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 394 transitions, 4961 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 20:31:41,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:41,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:41,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:42,527 INFO L124 PetriNetUnfolderBase]: 3258/5121 cut-off events. [2024-06-21 20:31:42,528 INFO L125 PetriNetUnfolderBase]: For 367587/367592 co-relation queries the response was YES. [2024-06-21 20:31:42,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40372 conditions, 5121 events. 3258/5121 cut-off events. For 367587/367592 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29436 event pairs, 1045 based on Foata normal form. 6/5123 useless extension candidates. Maximal degree in co-relation 40276. Up to 4651 conditions per place. [2024-06-21 20:31:42,580 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 384 selfloop transitions, 58 changer transitions 0/447 dead transitions. [2024-06-21 20:31:42,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 447 transitions, 6179 flow [2024-06-21 20:31:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:31:42,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:31:42,582 INFO L175 Difference]: Start difference. First operand has 214 places, 394 transitions, 4961 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:31:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 447 transitions, 6179 flow [2024-06-21 20:31:43,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 447 transitions, 5941 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:43,112 INFO L231 Difference]: Finished difference. Result has 222 places, 412 transitions, 5050 flow [2024-06-21 20:31:43,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5050, PETRI_PLACES=222, PETRI_TRANSITIONS=412} [2024-06-21 20:31:43,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-21 20:31:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 412 transitions, 5050 flow [2024-06-21 20:31:43,113 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 20:31:43,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:43,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:31:43,113 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:43,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2074490463, now seen corresponding path program 2 times [2024-06-21 20:31:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:43,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267169024] [2024-06-21 20:31:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:43,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:43,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267169024] [2024-06-21 20:31:43,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267169024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:43,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:43,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:43,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176638643] [2024-06-21 20:31:43,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:43,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:44,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:44,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 412 transitions, 5050 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:44,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:44,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:44,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:45,005 INFO L124 PetriNetUnfolderBase]: 2797/4609 cut-off events. [2024-06-21 20:31:45,005 INFO L125 PetriNetUnfolderBase]: For 367719/367736 co-relation queries the response was YES. [2024-06-21 20:31:45,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37276 conditions, 4609 events. 2797/4609 cut-off events. For 367719/367736 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28169 event pairs, 705 based on Foata normal form. 7/4587 useless extension candidates. Maximal degree in co-relation 37177. Up to 3820 conditions per place. [2024-06-21 20:31:45,052 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 52 changer transitions 0/439 dead transitions. [2024-06-21 20:31:45,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 439 transitions, 5862 flow [2024-06-21 20:31:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:45,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 20:31:45,053 INFO L175 Difference]: Start difference. First operand has 222 places, 412 transitions, 5050 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:45,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 439 transitions, 5862 flow [2024-06-21 20:31:45,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 439 transitions, 5582 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:45,603 INFO L231 Difference]: Finished difference. Result has 224 places, 418 transitions, 4959 flow [2024-06-21 20:31:45,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4959, PETRI_PLACES=224, PETRI_TRANSITIONS=418} [2024-06-21 20:31:45,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-21 20:31:45,604 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 418 transitions, 4959 flow [2024-06-21 20:31:45,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:45,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:45,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:45,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:31:45,604 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:45,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2030710217, now seen corresponding path program 1 times [2024-06-21 20:31:45,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:45,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972256188] [2024-06-21 20:31:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:46,564 INFO 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 20:31:46,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:46,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972256188] [2024-06-21 20:31:46,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972256188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:46,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:46,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524278370] [2024-06-21 20:31:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:46,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:46,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:46,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:46,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 418 transitions, 4959 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 20:31:46,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:46,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:47,493 INFO L124 PetriNetUnfolderBase]: 2822/4631 cut-off events. [2024-06-21 20:31:47,493 INFO L125 PetriNetUnfolderBase]: For 390536/390575 co-relation queries the response was YES. [2024-06-21 20:31:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37467 conditions, 4631 events. 2822/4631 cut-off events. For 390536/390575 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28343 event pairs, 994 based on Foata normal form. 10/4600 useless extension candidates. Maximal degree in co-relation 37369. Up to 3936 conditions per place. [2024-06-21 20:31:47,543 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 20 changer transitions 0/442 dead transitions. [2024-06-21 20:31:47,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 442 transitions, 5757 flow [2024-06-21 20:31:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:31:47,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:31:47,545 INFO L175 Difference]: Start difference. First operand has 224 places, 418 transitions, 4959 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:31:47,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 442 transitions, 5757 flow [2024-06-21 20:31:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 442 transitions, 5628 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:47,993 INFO L231 Difference]: Finished difference. Result has 227 places, 424 transitions, 4942 flow [2024-06-21 20:31:47,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=227, PETRI_TRANSITIONS=424} [2024-06-21 20:31:47,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-21 20:31:47,994 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 424 transitions, 4942 flow [2024-06-21 20:31:47,994 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 20:31:47,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:47,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:47,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:31:47,995 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 20:31:47,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2030709783, now seen corresponding path program 3 times [2024-06-21 20:31:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:47,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603102122] [2024-06-21 20:31:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:48,825 INFO 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 20:31:48,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:48,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603102122] [2024-06-21 20:31:48,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603102122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:48,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:48,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:48,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506193676] [2024-06-21 20:31:48,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:48,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:48,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:31:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 424 transitions, 4942 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 20:31:48,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:31:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:49,781 INFO L124 PetriNetUnfolderBase]: 2829/4640 cut-off events. [2024-06-21 20:31:49,781 INFO L125 PetriNetUnfolderBase]: For 390418/390425 co-relation queries the response was YES. [2024-06-21 20:31:49,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38119 conditions, 4640 events. 2829/4640 cut-off events. For 390418/390425 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28188 event pairs, 684 based on Foata normal form. 3/4613 useless extension candidates. Maximal degree in co-relation 38019. Up to 3833 conditions per place. [2024-06-21 20:31:49,837 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 279 selfloop transitions, 60 changer transitions 0/445 dead transitions. [2024-06-21 20:31:49,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 445 transitions, 5752 flow [2024-06-21 20:31:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:31:49,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:31:49,839 INFO L175 Difference]: Start difference. First operand has 227 places, 424 transitions, 4942 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:31:49,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 445 transitions, 5752 flow [2024-06-21 20:31:50,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 445 transitions, 5692 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:50,295 INFO L231 Difference]: Finished difference. Result has 231 places, 427 transitions, 5070 flow [2024-06-21 20:31:50,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5070, PETRI_PLACES=231, PETRI_TRANSITIONS=427} [2024-06-21 20:31:50,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 20:31:50,296 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 427 transitions, 5070 flow [2024-06-21 20:31:50,296 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 20:31:50,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:31:50,297 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:50,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1772158572, now seen corresponding path program 11 times [2024-06-21 20:31:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906171852] [2024-06-21 20:31:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906171852] [2024-06-21 20:31:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906171852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:51,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:51,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383582903] [2024-06-21 20:31:51,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:51,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:51,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 427 transitions, 5070 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 20:31:51,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:51,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:51,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:52,638 INFO L124 PetriNetUnfolderBase]: 3326/5211 cut-off events. [2024-06-21 20:31:52,639 INFO L125 PetriNetUnfolderBase]: For 422805/422809 co-relation queries the response was YES. [2024-06-21 20:31:52,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42680 conditions, 5211 events. 3326/5211 cut-off events. For 422805/422809 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29898 event pairs, 718 based on Foata normal form. 10/5220 useless extension candidates. Maximal degree in co-relation 42579. Up to 4234 conditions per place. [2024-06-21 20:31:52,699 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 155 changer transitions 0/472 dead transitions. [2024-06-21 20:31:52,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 472 transitions, 6510 flow [2024-06-21 20:31:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 20:31:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 20:31:52,700 INFO L175 Difference]: Start difference. First operand has 231 places, 427 transitions, 5070 flow. Second operand 10 states and 194 transitions. [2024-06-21 20:31:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 472 transitions, 6510 flow [2024-06-21 20:31:53,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 472 transitions, 6344 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:53,270 INFO L231 Difference]: Finished difference. Result has 235 places, 431 transitions, 5355 flow [2024-06-21 20:31:53,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5355, PETRI_PLACES=235, PETRI_TRANSITIONS=431} [2024-06-21 20:31:53,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 20:31:53,271 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 431 transitions, 5355 flow [2024-06-21 20:31:53,271 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 20:31:53,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:53,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:53,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:31:53,272 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:53,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1769301612, now seen corresponding path program 12 times [2024-06-21 20:31:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:53,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167190593] [2024-06-21 20:31:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:54,267 INFO 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 20:31:54,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:54,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167190593] [2024-06-21 20:31:54,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167190593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:54,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:54,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868622213] [2024-06-21 20:31:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:54,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:54,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 431 transitions, 5355 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 20:31:54,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:54,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:54,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:55,635 INFO L124 PetriNetUnfolderBase]: 3308/5197 cut-off events. [2024-06-21 20:31:55,635 INFO L125 PetriNetUnfolderBase]: For 430069/430073 co-relation queries the response was YES. [2024-06-21 20:31:55,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42914 conditions, 5197 events. 3308/5197 cut-off events. For 430069/430073 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29943 event pairs, 967 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 42812. Up to 4604 conditions per place. [2024-06-21 20:31:55,694 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 356 selfloop transitions, 103 changer transitions 0/464 dead transitions. [2024-06-21 20:31:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 464 transitions, 6433 flow [2024-06-21 20:31:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:31:55,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:31:55,695 INFO L175 Difference]: Start difference. First operand has 235 places, 431 transitions, 5355 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:31:55,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 464 transitions, 6433 flow [2024-06-21 20:31:56,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 464 transitions, 6065 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-06-21 20:31:56,377 INFO L231 Difference]: Finished difference. Result has 235 places, 431 transitions, 5235 flow [2024-06-21 20:31:56,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5235, PETRI_PLACES=235, PETRI_TRANSITIONS=431} [2024-06-21 20:31:56,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 20:31:56,378 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 431 transitions, 5235 flow [2024-06-21 20:31:56,379 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 20:31:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:56,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:31:56,379 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 800736522, now seen corresponding path program 13 times [2024-06-21 20:31:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553831215] [2024-06-21 20:31:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:57,339 INFO 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 20:31:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553831215] [2024-06-21 20:31:57,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553831215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:57,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:57,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:57,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760302938] [2024-06-21 20:31:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:57,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:31:57,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 431 transitions, 5235 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 20:31:57,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:57,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:31:57,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:58,719 INFO L124 PetriNetUnfolderBase]: 3325/5215 cut-off events. [2024-06-21 20:31:58,719 INFO L125 PetriNetUnfolderBase]: For 379239/379244 co-relation queries the response was YES. [2024-06-21 20:31:58,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42037 conditions, 5215 events. 3325/5215 cut-off events. For 379239/379244 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30023 event pairs, 884 based on Foata normal form. 8/5221 useless extension candidates. Maximal degree in co-relation 41936. Up to 4508 conditions per place. [2024-06-21 20:31:58,770 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 294 selfloop transitions, 169 changer transitions 0/468 dead transitions. [2024-06-21 20:31:58,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 468 transitions, 6452 flow [2024-06-21 20:31:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:31:58,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:31:58,771 INFO L175 Difference]: Start difference. First operand has 235 places, 431 transitions, 5235 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:31:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 468 transitions, 6452 flow [2024-06-21 20:31:59,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 468 transitions, 6171 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 20:31:59,227 INFO L231 Difference]: Finished difference. Result has 234 places, 433 transitions, 5380 flow [2024-06-21 20:31:59,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4954, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5380, PETRI_PLACES=234, PETRI_TRANSITIONS=433} [2024-06-21 20:31:59,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 20:31:59,227 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 433 transitions, 5380 flow [2024-06-21 20:31:59,228 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 20:31:59,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:59,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:59,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:31:59,228 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 20:31:59,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:59,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1516134099, now seen corresponding path program 4 times [2024-06-21 20:31:59,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:59,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058899312] [2024-06-21 20:31:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:59,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:59,978 INFO 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 20:31:59,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:59,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058899312] [2024-06-21 20:31:59,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058899312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:59,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:59,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:59,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885084496] [2024-06-21 20:31:59,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:59,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:00,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:00,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 433 transitions, 5380 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 20:32:00,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:00,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:00,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:01,081 INFO L124 PetriNetUnfolderBase]: 2846/4691 cut-off events. [2024-06-21 20:32:01,081 INFO L125 PetriNetUnfolderBase]: For 358487/358529 co-relation queries the response was YES. [2024-06-21 20:32:01,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37851 conditions, 4691 events. 2846/4691 cut-off events. For 358487/358529 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29066 event pairs, 946 based on Foata normal form. 12/4663 useless extension candidates. Maximal degree in co-relation 37751. Up to 3912 conditions per place. [2024-06-21 20:32:01,141 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 293 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-21 20:32:01,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 455 transitions, 6226 flow [2024-06-21 20:32:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 20:32:01,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-21 20:32:01,143 INFO L175 Difference]: Start difference. First operand has 234 places, 433 transitions, 5380 flow. Second operand 7 states and 145 transitions. [2024-06-21 20:32:01,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 455 transitions, 6226 flow [2024-06-21 20:32:01,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 455 transitions, 5832 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:01,576 INFO L231 Difference]: Finished difference. Result has 234 places, 436 transitions, 5185 flow [2024-06-21 20:32:01,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5185, PETRI_PLACES=234, PETRI_TRANSITIONS=436} [2024-06-21 20:32:01,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 20:32:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 436 transitions, 5185 flow [2024-06-21 20:32:01,577 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 20:32:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:32:01,577 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash 966375656, now seen corresponding path program 14 times [2024-06-21 20:32:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965486621] [2024-06-21 20:32:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:02,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:02,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965486621] [2024-06-21 20:32:02,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965486621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:02,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:02,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512357538] [2024-06-21 20:32:02,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:02,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:02,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 436 transitions, 5185 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 20:32:02,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:03,965 INFO L124 PetriNetUnfolderBase]: 3352/5260 cut-off events. [2024-06-21 20:32:03,965 INFO L125 PetriNetUnfolderBase]: For 339829/339832 co-relation queries the response was YES. [2024-06-21 20:32:03,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41386 conditions, 5260 events. 3352/5260 cut-off events. For 339829/339832 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30286 event pairs, 718 based on Foata normal form. 6/5264 useless extension candidates. Maximal degree in co-relation 41285. Up to 4574 conditions per place. [2024-06-21 20:32:04,015 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 305 selfloop transitions, 162 changer transitions 0/472 dead transitions. [2024-06-21 20:32:04,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 472 transitions, 6413 flow [2024-06-21 20:32:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:32:04,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:32:04,016 INFO L175 Difference]: Start difference. First operand has 234 places, 436 transitions, 5185 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:32:04,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 472 transitions, 6413 flow [2024-06-21 20:32:04,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 472 transitions, 6270 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:04,467 INFO L231 Difference]: Finished difference. Result has 238 places, 438 transitions, 5445 flow [2024-06-21 20:32:04,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5042, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=238, PETRI_TRANSITIONS=438} [2024-06-21 20:32:04,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-21 20:32:04,468 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 438 transitions, 5445 flow [2024-06-21 20:32:04,468 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 20:32:04,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:04,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:04,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:32:04,468 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:04,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:04,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1741000056, now seen corresponding path program 2 times [2024-06-21 20:32:04,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:04,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132841652] [2024-06-21 20:32:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:05,674 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 20:32:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:05,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132841652] [2024-06-21 20:32:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132841652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672514475] [2024-06-21 20:32:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 438 transitions, 5445 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 20:32:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:05,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:07,042 INFO L124 PetriNetUnfolderBase]: 3369/5299 cut-off events. [2024-06-21 20:32:07,043 INFO L125 PetriNetUnfolderBase]: For 336065/336070 co-relation queries the response was YES. [2024-06-21 20:32:07,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41282 conditions, 5299 events. 3369/5299 cut-off events. For 336065/336070 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30854 event pairs, 1051 based on Foata normal form. 6/5301 useless extension candidates. Maximal degree in co-relation 41180. Up to 4799 conditions per place. [2024-06-21 20:32:07,098 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 64 changer transitions 0/478 dead transitions. [2024-06-21 20:32:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 478 transitions, 6681 flow [2024-06-21 20:32:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:32:07,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:32:07,099 INFO L175 Difference]: Start difference. First operand has 238 places, 438 transitions, 5445 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:32:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 478 transitions, 6681 flow [2024-06-21 20:32:07,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 478 transitions, 6302 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:07,483 INFO L231 Difference]: Finished difference. Result has 241 places, 445 transitions, 5320 flow [2024-06-21 20:32:07,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5320, PETRI_PLACES=241, PETRI_TRANSITIONS=445} [2024-06-21 20:32:07,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-21 20:32:07,484 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 445 transitions, 5320 flow [2024-06-21 20:32:07,484 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 20:32:07,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:07,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:07,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:32:07,484 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 20:32:07,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2031198739, now seen corresponding path program 2 times [2024-06-21 20:32:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237716390] [2024-06-21 20:32:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237716390] [2024-06-21 20:32:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237716390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:08,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384614106] [2024-06-21 20:32:08,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:08,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:08,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 445 transitions, 5320 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 20:32:08,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:08,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:08,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:09,570 INFO L124 PetriNetUnfolderBase]: 2884/4740 cut-off events. [2024-06-21 20:32:09,570 INFO L125 PetriNetUnfolderBase]: For 330601/330640 co-relation queries the response was YES. [2024-06-21 20:32:09,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37374 conditions, 4740 events. 2884/4740 cut-off events. For 330601/330640 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29312 event pairs, 993 based on Foata normal form. 10/4702 useless extension candidates. Maximal degree in co-relation 37270. Up to 4027 conditions per place. [2024-06-21 20:32:09,623 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 328 selfloop transitions, 24 changer transitions 0/462 dead transitions. [2024-06-21 20:32:09,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 462 transitions, 6134 flow [2024-06-21 20:32:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:32:09,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:32:09,625 INFO L175 Difference]: Start difference. First operand has 241 places, 445 transitions, 5320 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:32:09,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 462 transitions, 6134 flow [2024-06-21 20:32:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 462 transitions, 5955 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:09,962 INFO L231 Difference]: Finished difference. Result has 242 places, 448 transitions, 5251 flow [2024-06-21 20:32:09,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5143, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5251, PETRI_PLACES=242, PETRI_TRANSITIONS=448} [2024-06-21 20:32:09,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-21 20:32:09,963 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 448 transitions, 5251 flow [2024-06-21 20:32:09,963 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 20:32:09,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:09,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:32:09,964 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -390159447, now seen corresponding path program 5 times [2024-06-21 20:32:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942819380] [2024-06-21 20:32:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:10,914 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 20:32:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942819380] [2024-06-21 20:32:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942819380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438678456] [2024-06-21 20:32:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:11,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 448 transitions, 5251 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:11,970 INFO L124 PetriNetUnfolderBase]: 2884/4742 cut-off events. [2024-06-21 20:32:11,971 INFO L125 PetriNetUnfolderBase]: For 315918/315936 co-relation queries the response was YES. [2024-06-21 20:32:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37128 conditions, 4742 events. 2884/4742 cut-off events. For 315918/315936 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29050 event pairs, 683 based on Foata normal form. 3/4707 useless extension candidates. Maximal degree in co-relation 37023. Up to 3910 conditions per place. [2024-06-21 20:32:12,017 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 292 selfloop transitions, 63 changer transitions 0/465 dead transitions. [2024-06-21 20:32:12,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 465 transitions, 6083 flow [2024-06-21 20:32:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:32:12,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 20:32:12,018 INFO L175 Difference]: Start difference. First operand has 242 places, 448 transitions, 5251 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:32:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 465 transitions, 6083 flow [2024-06-21 20:32:12,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 465 transitions, 6001 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:12,376 INFO L231 Difference]: Finished difference. Result has 244 places, 451 transitions, 5369 flow [2024-06-21 20:32:12,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5369, PETRI_PLACES=244, PETRI_TRANSITIONS=451} [2024-06-21 20:32:12,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-21 20:32:12,377 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 451 transitions, 5369 flow [2024-06-21 20:32:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:12,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:12,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:32:12,378 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 20:32:12,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 264921554, now seen corresponding path program 15 times [2024-06-21 20:32:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524773839] [2024-06-21 20:32:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:13,326 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 20:32:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524773839] [2024-06-21 20:32:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524773839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574285563] [2024-06-21 20:32:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:13,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:13,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 451 transitions, 5369 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 20:32:13,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:13,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:14,891 INFO L124 PetriNetUnfolderBase]: 3376/5298 cut-off events. [2024-06-21 20:32:14,891 INFO L125 PetriNetUnfolderBase]: For 322979/322981 co-relation queries the response was YES. [2024-06-21 20:32:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40758 conditions, 5298 events. 3376/5298 cut-off events. For 322979/322981 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30502 event pairs, 731 based on Foata normal form. 4/5288 useless extension candidates. Maximal degree in co-relation 40652. Up to 4631 conditions per place. [2024-06-21 20:32:14,947 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 318 selfloop transitions, 157 changer transitions 0/480 dead transitions. [2024-06-21 20:32:14,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 480 transitions, 6530 flow [2024-06-21 20:32:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:32:14,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:32:14,949 INFO L175 Difference]: Start difference. First operand has 244 places, 451 transitions, 5369 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:32:14,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 480 transitions, 6530 flow [2024-06-21 20:32:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 480 transitions, 6360 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:15,451 INFO L231 Difference]: Finished difference. Result has 248 places, 453 transitions, 5588 flow [2024-06-21 20:32:15,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5588, PETRI_PLACES=248, PETRI_TRANSITIONS=453} [2024-06-21 20:32:15,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 20:32:15,453 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 453 transitions, 5588 flow [2024-06-21 20:32:15,453 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 20:32:15,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:15,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:15,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:32:15,454 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 20:32:15,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash -110514220, now seen corresponding path program 3 times [2024-06-21 20:32:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:15,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144514135] [2024-06-21 20:32:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:16,812 INFO 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 20:32:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:16,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144514135] [2024-06-21 20:32:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144514135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:16,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:16,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863085206] [2024-06-21 20:32:16,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:16,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:16,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 453 transitions, 5588 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 20:32:16,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:16,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:16,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:18,175 INFO L124 PetriNetUnfolderBase]: 3411/5377 cut-off events. [2024-06-21 20:32:18,175 INFO L125 PetriNetUnfolderBase]: For 330637/330643 co-relation queries the response was YES. [2024-06-21 20:32:18,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41249 conditions, 5377 events. 3411/5377 cut-off events. For 330637/330643 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31499 event pairs, 1044 based on Foata normal form. 8/5382 useless extension candidates. Maximal degree in co-relation 41142. Up to 4873 conditions per place. [2024-06-21 20:32:18,239 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 415 selfloop transitions, 78 changer transitions 0/498 dead transitions. [2024-06-21 20:32:18,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 498 transitions, 6907 flow [2024-06-21 20:32:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:32:18,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:32:18,240 INFO L175 Difference]: Start difference. First operand has 248 places, 453 transitions, 5588 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:32:18,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 498 transitions, 6907 flow [2024-06-21 20:32:18,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 498 transitions, 6540 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:18,634 INFO L231 Difference]: Finished difference. Result has 251 places, 470 transitions, 5599 flow [2024-06-21 20:32:18,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5599, PETRI_PLACES=251, PETRI_TRANSITIONS=470} [2024-06-21 20:32:18,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-21 20:32:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 470 transitions, 5599 flow [2024-06-21 20:32:18,634 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 20:32:18,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:18,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:32:18,635 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 20:32:18,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1892862964, now seen corresponding path program 4 times [2024-06-21 20:32:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:18,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398323093] [2024-06-21 20:32:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:18,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:19,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:19,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398323093] [2024-06-21 20:32:19,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398323093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:19,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862795386] [2024-06-21 20:32:19,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:19,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:19,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:19,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 470 transitions, 5599 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 20:32:19,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:19,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:19,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:21,273 INFO L124 PetriNetUnfolderBase]: 3428/5406 cut-off events. [2024-06-21 20:32:21,273 INFO L125 PetriNetUnfolderBase]: For 342745/342751 co-relation queries the response was YES. [2024-06-21 20:32:21,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41794 conditions, 5406 events. 3428/5406 cut-off events. For 342745/342751 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31729 event pairs, 1057 based on Foata normal form. 8/5411 useless extension candidates. Maximal degree in co-relation 41685. Up to 4900 conditions per place. [2024-06-21 20:32:21,339 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 423 selfloop transitions, 73 changer transitions 0/501 dead transitions. [2024-06-21 20:32:21,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 501 transitions, 6801 flow [2024-06-21 20:32:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:32:21,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:32:21,340 INFO L175 Difference]: Start difference. First operand has 251 places, 470 transitions, 5599 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:32:21,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 501 transitions, 6801 flow [2024-06-21 20:32:21,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 501 transitions, 6651 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:21,754 INFO L231 Difference]: Finished difference. Result has 257 places, 473 transitions, 5687 flow [2024-06-21 20:32:21,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5687, PETRI_PLACES=257, PETRI_TRANSITIONS=473} [2024-06-21 20:32:21,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 20:32:21,755 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 473 transitions, 5687 flow [2024-06-21 20:32:21,755 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 20:32:21,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:21,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:32:21,756 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 20:32:21,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1763685550, now seen corresponding path program 5 times [2024-06-21 20:32:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:21,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862717396] [2024-06-21 20:32:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:22,886 INFO 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 20:32:22,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862717396] [2024-06-21 20:32:22,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862717396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:22,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:22,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678319034] [2024-06-21 20:32:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:22,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:22,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:22,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 473 transitions, 5687 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 20:32:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:24,275 INFO L124 PetriNetUnfolderBase]: 3445/5437 cut-off events. [2024-06-21 20:32:24,275 INFO L125 PetriNetUnfolderBase]: For 355864/355870 co-relation queries the response was YES. [2024-06-21 20:32:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41976 conditions, 5437 events. 3445/5437 cut-off events. For 355864/355870 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31938 event pairs, 1065 based on Foata normal form. 8/5442 useless extension candidates. Maximal degree in co-relation 41865. Up to 4927 conditions per place. [2024-06-21 20:32:24,336 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 76 changer transitions 0/502 dead transitions. [2024-06-21 20:32:24,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 502 transitions, 6881 flow [2024-06-21 20:32:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:32:24,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:32:24,337 INFO L175 Difference]: Start difference. First operand has 257 places, 473 transitions, 5687 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:32:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 502 transitions, 6881 flow [2024-06-21 20:32:24,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 502 transitions, 6679 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:24,853 INFO L231 Difference]: Finished difference. Result has 260 places, 475 transitions, 5715 flow [2024-06-21 20:32:24,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5485, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5715, PETRI_PLACES=260, PETRI_TRANSITIONS=475} [2024-06-21 20:32:24,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 20:32:24,854 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 475 transitions, 5715 flow [2024-06-21 20:32:24,854 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 20:32:24,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:24,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:24,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:32:24,854 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 20:32:24,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2059260940, now seen corresponding path program 6 times [2024-06-21 20:32:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:24,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389208731] [2024-06-21 20:32:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:25,970 INFO 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 20:32:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389208731] [2024-06-21 20:32:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389208731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:25,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:25,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:25,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649364817] [2024-06-21 20:32:25,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:26,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:26,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 475 transitions, 5715 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 20:32:26,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:26,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:26,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:27,345 INFO L124 PetriNetUnfolderBase]: 3437/5424 cut-off events. [2024-06-21 20:32:27,345 INFO L125 PetriNetUnfolderBase]: For 364230/364236 co-relation queries the response was YES. [2024-06-21 20:32:27,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41934 conditions, 5424 events. 3437/5424 cut-off events. For 364230/364236 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31888 event pairs, 1011 based on Foata normal form. 8/5429 useless extension candidates. Maximal degree in co-relation 41822. Up to 4793 conditions per place. [2024-06-21 20:32:27,407 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 90 changer transitions 0/506 dead transitions. [2024-06-21 20:32:27,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 506 transitions, 6948 flow [2024-06-21 20:32:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:32:27,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 20:32:27,409 INFO L175 Difference]: Start difference. First operand has 260 places, 475 transitions, 5715 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:32:27,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 506 transitions, 6948 flow [2024-06-21 20:32:27,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 506 transitions, 6683 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 20:32:27,825 INFO L231 Difference]: Finished difference. Result has 259 places, 477 transitions, 5711 flow [2024-06-21 20:32:27,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=259, PETRI_TRANSITIONS=477} [2024-06-21 20:32:27,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-21 20:32:27,826 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 477 transitions, 5711 flow [2024-06-21 20:32:27,826 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 20:32:27,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:27,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:27,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:32:27,826 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:27,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash 23623097, now seen corresponding path program 3 times [2024-06-21 20:32:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002137224] [2024-06-21 20:32:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:27,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:28,921 INFO 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 20:32:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:28,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002137224] [2024-06-21 20:32:28,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002137224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:28,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99806064] [2024-06-21 20:32:28,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:28,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 477 transitions, 5711 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 20:32:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:29,924 INFO L124 PetriNetUnfolderBase]: 2947/4847 cut-off events. [2024-06-21 20:32:29,924 INFO L125 PetriNetUnfolderBase]: For 373148/373191 co-relation queries the response was YES. [2024-06-21 20:32:29,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38340 conditions, 4847 events. 2947/4847 cut-off events. For 373148/373191 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30107 event pairs, 997 based on Foata normal form. 12/4802 useless extension candidates. Maximal degree in co-relation 38230. Up to 4112 conditions per place. [2024-06-21 20:32:29,979 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 349 selfloop transitions, 35 changer transitions 0/495 dead transitions. [2024-06-21 20:32:29,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 495 transitions, 6737 flow [2024-06-21 20:32:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:32:29,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:32:29,980 INFO L175 Difference]: Start difference. First operand has 259 places, 477 transitions, 5711 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:32:29,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 495 transitions, 6737 flow [2024-06-21 20:32:30,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 495 transitions, 6494 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:30,324 INFO L231 Difference]: Finished difference. Result has 260 places, 485 transitions, 5681 flow [2024-06-21 20:32:30,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5468, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5681, PETRI_PLACES=260, PETRI_TRANSITIONS=485} [2024-06-21 20:32:30,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 20:32:30,325 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 485 transitions, 5681 flow [2024-06-21 20:32:30,325 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 20:32:30,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:30,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:32:30,326 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:30,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 23147433, now seen corresponding path program 6 times [2024-06-21 20:32:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297233640] [2024-06-21 20:32:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:31,327 INFO 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 20:32:31,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297233640] [2024-06-21 20:32:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297233640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:31,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996847238] [2024-06-21 20:32:31,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:31,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:31,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:31,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:31,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 485 transitions, 5681 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:31,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:31,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:31,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:32,409 INFO L124 PetriNetUnfolderBase]: 2939/4833 cut-off events. [2024-06-21 20:32:32,409 INFO L125 PetriNetUnfolderBase]: For 369613/369622 co-relation queries the response was YES. [2024-06-21 20:32:32,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 4833 events. 2939/4833 cut-off events. For 369613/369622 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29757 event pairs, 692 based on Foata normal form. 6/4791 useless extension candidates. Maximal degree in co-relation 38311. Up to 3991 conditions per place. [2024-06-21 20:32:32,462 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 68 changer transitions 0/497 dead transitions. [2024-06-21 20:32:32,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 497 transitions, 6547 flow [2024-06-21 20:32:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:32:32,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:32:32,463 INFO L175 Difference]: Start difference. First operand has 260 places, 485 transitions, 5681 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:32:32,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 497 transitions, 6547 flow [2024-06-21 20:32:32,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 497 transitions, 6472 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:32,961 INFO L231 Difference]: Finished difference. Result has 264 places, 488 transitions, 5812 flow [2024-06-21 20:32:32,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5606, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5812, PETRI_PLACES=264, PETRI_TRANSITIONS=488} [2024-06-21 20:32:32,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 20:32:32,962 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 488 transitions, 5812 flow [2024-06-21 20:32:32,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:32,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:32,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:32:32,962 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:32,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1503753505, now seen corresponding path program 4 times [2024-06-21 20:32:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:32,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060853697] [2024-06-21 20:32:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060853697] [2024-06-21 20:32:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060853697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:34,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310908053] [2024-06-21 20:32:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:34,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:34,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 488 transitions, 5812 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 20:32:34,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:34,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:34,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:35,179 INFO L124 PetriNetUnfolderBase]: 2941/4844 cut-off events. [2024-06-21 20:32:35,180 INFO L125 PetriNetUnfolderBase]: For 394400/394433 co-relation queries the response was YES. [2024-06-21 20:32:35,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38946 conditions, 4844 events. 2941/4844 cut-off events. For 394400/394433 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30147 event pairs, 997 based on Foata normal form. 12/4807 useless extension candidates. Maximal degree in co-relation 38832. Up to 4117 conditions per place. [2024-06-21 20:32:35,241 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 362 selfloop transitions, 25 changer transitions 0/498 dead transitions. [2024-06-21 20:32:35,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 498 transitions, 6629 flow [2024-06-21 20:32:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:32:35,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:32:35,242 INFO L175 Difference]: Start difference. First operand has 264 places, 488 transitions, 5812 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:32:35,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 498 transitions, 6629 flow [2024-06-21 20:32:35,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 498 transitions, 6411 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:35,825 INFO L231 Difference]: Finished difference. Result has 266 places, 489 transitions, 5659 flow [2024-06-21 20:32:35,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5659, PETRI_PLACES=266, PETRI_TRANSITIONS=489} [2024-06-21 20:32:35,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 20:32:35,825 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 489 transitions, 5659 flow [2024-06-21 20:32:35,825 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 20:32:35,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:35,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:35,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:32:35,826 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:35,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash -183440256, now seen corresponding path program 1 times [2024-06-21 20:32:35,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:35,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361436274] [2024-06-21 20:32:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:35,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:36,578 INFO 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 20:32:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361436274] [2024-06-21 20:32:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361436274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:36,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:36,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:36,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029077911] [2024-06-21 20:32:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:36,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:36,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:36,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:36,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 489 transitions, 5659 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 20:32:36,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:36,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:36,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:37,743 INFO L124 PetriNetUnfolderBase]: 3179/5140 cut-off events. [2024-06-21 20:32:37,743 INFO L125 PetriNetUnfolderBase]: For 406247/406266 co-relation queries the response was YES. [2024-06-21 20:32:37,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40677 conditions, 5140 events. 3179/5140 cut-off events. For 406247/406266 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31246 event pairs, 1132 based on Foata normal form. 20/5145 useless extension candidates. Maximal degree in co-relation 40562. Up to 4549 conditions per place. [2024-06-21 20:32:37,809 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 15 changer transitions 0/508 dead transitions. [2024-06-21 20:32:37,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 508 transitions, 6711 flow [2024-06-21 20:32:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:32:37,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:32:37,811 INFO L175 Difference]: Start difference. First operand has 266 places, 489 transitions, 5659 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:32:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 508 transitions, 6711 flow [2024-06-21 20:32:38,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 508 transitions, 6657 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:38,349 INFO L231 Difference]: Finished difference. Result has 268 places, 492 transitions, 5695 flow [2024-06-21 20:32:38,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5695, PETRI_PLACES=268, PETRI_TRANSITIONS=492} [2024-06-21 20:32:38,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 20:32:38,350 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 492 transitions, 5695 flow [2024-06-21 20:32:38,350 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 20:32:38,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:38,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:32:38,350 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 20:32:38,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -848809509, now seen corresponding path program 1 times [2024-06-21 20:32:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462768615] [2024-06-21 20:32:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:39,295 INFO 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 20:32:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462768615] [2024-06-21 20:32:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462768615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:39,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046283353] [2024-06-21 20:32:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:39,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:39,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 492 transitions, 5695 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 20:32:39,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:39,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:39,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:40,374 INFO L124 PetriNetUnfolderBase]: 3194/5161 cut-off events. [2024-06-21 20:32:40,374 INFO L125 PetriNetUnfolderBase]: For 420403/420422 co-relation queries the response was YES. [2024-06-21 20:32:40,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41342 conditions, 5161 events. 3194/5161 cut-off events. For 420403/420422 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31376 event pairs, 1132 based on Foata normal form. 21/5168 useless extension candidates. Maximal degree in co-relation 41226. Up to 4574 conditions per place. [2024-06-21 20:32:40,438 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 445 selfloop transitions, 15 changer transitions 0/508 dead transitions. [2024-06-21 20:32:40,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 508 transitions, 6723 flow [2024-06-21 20:32:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:32:40,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:32:40,439 INFO L175 Difference]: Start difference. First operand has 268 places, 492 transitions, 5695 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:32:40,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 508 transitions, 6723 flow [2024-06-21 20:32:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 508 transitions, 6655 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:40,910 INFO L231 Difference]: Finished difference. Result has 270 places, 495 transitions, 5717 flow [2024-06-21 20:32:40,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5717, PETRI_PLACES=270, PETRI_TRANSITIONS=495} [2024-06-21 20:32:40,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-21 20:32:40,911 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 495 transitions, 5717 flow [2024-06-21 20:32:40,911 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 20:32:40,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:40,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:40,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:32:40,912 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 20:32:40,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash -183290526, now seen corresponding path program 2 times [2024-06-21 20:32:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75600266] [2024-06-21 20:32:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:41,826 INFO 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 20:32:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75600266] [2024-06-21 20:32:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75600266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:41,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:41,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:41,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560354272] [2024-06-21 20:32:41,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:41,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:41,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:41,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:41,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:41,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:41,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 495 transitions, 5717 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:41,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:41,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:41,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:42,972 INFO L124 PetriNetUnfolderBase]: 3204/5177 cut-off events. [2024-06-21 20:32:42,972 INFO L125 PetriNetUnfolderBase]: For 431073/431092 co-relation queries the response was YES. [2024-06-21 20:32:43,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41899 conditions, 5177 events. 3204/5177 cut-off events. For 431073/431092 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31483 event pairs, 1132 based on Foata normal form. 20/5183 useless extension candidates. Maximal degree in co-relation 41782. Up to 4573 conditions per place. [2024-06-21 20:32:43,036 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 20 changer transitions 0/512 dead transitions. [2024-06-21 20:32:43,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 512 transitions, 6767 flow [2024-06-21 20:32:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:32:43,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:32:43,037 INFO L175 Difference]: Start difference. First operand has 270 places, 495 transitions, 5717 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:32:43,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 512 transitions, 6767 flow [2024-06-21 20:32:43,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 512 transitions, 6699 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:43,593 INFO L231 Difference]: Finished difference. Result has 272 places, 498 transitions, 5757 flow [2024-06-21 20:32:43,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5757, PETRI_PLACES=272, PETRI_TRANSITIONS=498} [2024-06-21 20:32:43,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-21 20:32:43,594 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 498 transitions, 5757 flow [2024-06-21 20:32:43,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:43,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:43,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:43,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:32:43,595 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:43,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash 23630041, now seen corresponding path program 2 times [2024-06-21 20:32:43,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:43,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263223428] [2024-06-21 20:32:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:43,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263223428] [2024-06-21 20:32:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263223428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:44,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936163157] [2024-06-21 20:32:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:44,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:44,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 498 transitions, 5757 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 20:32:44,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:45,903 INFO L124 PetriNetUnfolderBase]: 3214/5194 cut-off events. [2024-06-21 20:32:45,903 INFO L125 PetriNetUnfolderBase]: For 446060/446082 co-relation queries the response was YES. [2024-06-21 20:32:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42485 conditions, 5194 events. 3214/5194 cut-off events. For 446060/446082 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31615 event pairs, 1135 based on Foata normal form. 23/5202 useless extension candidates. Maximal degree in co-relation 42367. Up to 4569 conditions per place. [2024-06-21 20:32:45,964 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 438 selfloop transitions, 30 changer transitions 0/516 dead transitions. [2024-06-21 20:32:45,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 516 transitions, 6967 flow [2024-06-21 20:32:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:32:45,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:32:45,965 INFO L175 Difference]: Start difference. First operand has 272 places, 498 transitions, 5757 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:32:45,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 516 transitions, 6967 flow [2024-06-21 20:32:46,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 516 transitions, 6881 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:46,484 INFO L231 Difference]: Finished difference. Result has 274 places, 504 transitions, 5856 flow [2024-06-21 20:32:46,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5856, PETRI_PLACES=274, PETRI_TRANSITIONS=504} [2024-06-21 20:32:46,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 20:32:46,485 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 504 transitions, 5856 flow [2024-06-21 20:32:46,485 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 20:32:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:46,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:32:46,485 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 20:32:46,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1566473672, now seen corresponding path program 3 times [2024-06-21 20:32:46,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681279981] [2024-06-21 20:32:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:47,386 INFO 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 20:32:47,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:47,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681279981] [2024-06-21 20:32:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681279981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:47,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:47,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520963182] [2024-06-21 20:32:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:47,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:47,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:47,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 504 transitions, 5856 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 20:32:47,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:47,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:47,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:48,506 INFO L124 PetriNetUnfolderBase]: 3216/5200 cut-off events. [2024-06-21 20:32:48,506 INFO L125 PetriNetUnfolderBase]: For 457029/457051 co-relation queries the response was YES. [2024-06-21 20:32:48,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42913 conditions, 5200 events. 3216/5200 cut-off events. For 457029/457051 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31690 event pairs, 1141 based on Foata normal form. 22/5206 useless extension candidates. Maximal degree in co-relation 42794. Up to 4578 conditions per place. [2024-06-21 20:32:48,574 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 27 changer transitions 0/518 dead transitions. [2024-06-21 20:32:48,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 518 transitions, 6904 flow [2024-06-21 20:32:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:32:48,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:32:48,575 INFO L175 Difference]: Start difference. First operand has 274 places, 504 transitions, 5856 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:32:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 518 transitions, 6904 flow [2024-06-21 20:32:49,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 518 transitions, 6827 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:49,210 INFO L231 Difference]: Finished difference. Result has 278 places, 507 transitions, 5909 flow [2024-06-21 20:32:49,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5779, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5909, PETRI_PLACES=278, PETRI_TRANSITIONS=507} [2024-06-21 20:32:49,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 20:32:49,211 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 507 transitions, 5909 flow [2024-06-21 20:32:49,211 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 20:32:49,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:49,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:32:49,212 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 23363131, now seen corresponding path program 3 times [2024-06-21 20:32:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992095003] [2024-06-21 20:32:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:50,371 INFO 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 20:32:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992095003] [2024-06-21 20:32:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992095003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126865964] [2024-06-21 20:32:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:50,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:32:50,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 507 transitions, 5909 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 20:32:50,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:50,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:32:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:51,467 INFO L124 PetriNetUnfolderBase]: 3207/5187 cut-off events. [2024-06-21 20:32:51,467 INFO L125 PetriNetUnfolderBase]: For 465280/465302 co-relation queries the response was YES. [2024-06-21 20:32:51,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43039 conditions, 5187 events. 3207/5187 cut-off events. For 465280/465302 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31730 event pairs, 1135 based on Foata normal form. 23/5195 useless extension candidates. Maximal degree in co-relation 42918. Up to 4588 conditions per place. [2024-06-21 20:32:51,533 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 449 selfloop transitions, 20 changer transitions 0/517 dead transitions. [2024-06-21 20:32:51,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 517 transitions, 6885 flow [2024-06-21 20:32:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:32:51,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:32:51,535 INFO L175 Difference]: Start difference. First operand has 278 places, 507 transitions, 5909 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:32:51,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 517 transitions, 6885 flow [2024-06-21 20:32:52,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 517 transitions, 6745 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:52,051 INFO L231 Difference]: Finished difference. Result has 280 places, 507 transitions, 5815 flow [2024-06-21 20:32:52,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5769, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5815, PETRI_PLACES=280, PETRI_TRANSITIONS=507} [2024-06-21 20:32:52,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-21 20:32:52,052 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 507 transitions, 5815 flow [2024-06-21 20:32:52,052 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 20:32:52,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:52,052 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 20:32:52,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:32:52,052 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 20:32:52,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1477270329, now seen corresponding path program 1 times [2024-06-21 20:32:52,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:52,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824986757] [2024-06-21 20:32:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:52,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:52,949 INFO 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 20:32:52,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:52,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824986757] [2024-06-21 20:32:52,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824986757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:52,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:52,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518364496] [2024-06-21 20:32:52,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:53,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:53,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 507 transitions, 5815 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 20:32:53,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:53,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:53,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:54,517 INFO L124 PetriNetUnfolderBase]: 3667/5812 cut-off events. [2024-06-21 20:32:54,517 INFO L125 PetriNetUnfolderBase]: For 535541/535545 co-relation queries the response was YES. [2024-06-21 20:32:54,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48639 conditions, 5812 events. 3667/5812 cut-off events. For 535541/535545 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34883 event pairs, 947 based on Foata normal form. 20/5831 useless extension candidates. Maximal degree in co-relation 48517. Up to 4745 conditions per place. [2024-06-21 20:32:54,591 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 465 selfloop transitions, 106 changer transitions 0/576 dead transitions. [2024-06-21 20:32:54,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 576 transitions, 7624 flow [2024-06-21 20:32:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:32:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:32:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 257 transitions. [2024-06-21 20:32:54,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597495527728086 [2024-06-21 20:32:54,592 INFO L175 Difference]: Start difference. First operand has 280 places, 507 transitions, 5815 flow. Second operand 13 states and 257 transitions. [2024-06-21 20:32:54,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 576 transitions, 7624 flow [2024-06-21 20:32:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 576 transitions, 7564 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:55,158 INFO L231 Difference]: Finished difference. Result has 288 places, 513 transitions, 6131 flow [2024-06-21 20:32:55,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6131, PETRI_PLACES=288, PETRI_TRANSITIONS=513} [2024-06-21 20:32:55,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 20:32:55,159 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 513 transitions, 6131 flow [2024-06-21 20:32:55,159 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 20:32:55,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:55,159 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 20:32:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:32:55,159 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 20:32:55,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -131498315, now seen corresponding path program 2 times [2024-06-21 20:32:55,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568657012] [2024-06-21 20:32:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:56,026 INFO 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 20:32:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568657012] [2024-06-21 20:32:56,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568657012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:56,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:56,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835125162] [2024-06-21 20:32:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:56,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:56,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:56,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 513 transitions, 6131 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 20:32:56,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:56,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:56,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:57,907 INFO L124 PetriNetUnfolderBase]: 3811/6067 cut-off events. [2024-06-21 20:32:57,907 INFO L125 PetriNetUnfolderBase]: For 587378/587382 co-relation queries the response was YES. [2024-06-21 20:32:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52109 conditions, 6067 events. 3811/6067 cut-off events. For 587378/587382 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36892 event pairs, 1084 based on Foata normal form. 20/6086 useless extension candidates. Maximal degree in co-relation 51985. Up to 5168 conditions per place. [2024-06-21 20:32:57,973 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 481 selfloop transitions, 92 changer transitions 0/578 dead transitions. [2024-06-21 20:32:57,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 578 transitions, 7946 flow [2024-06-21 20:32:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:32:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:32:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2024-06-21 20:32:57,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561717352415027 [2024-06-21 20:32:57,974 INFO L175 Difference]: Start difference. First operand has 288 places, 513 transitions, 6131 flow. Second operand 13 states and 255 transitions. [2024-06-21 20:32:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 578 transitions, 7946 flow [2024-06-21 20:32:58,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 578 transitions, 7810 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:58,558 INFO L231 Difference]: Finished difference. Result has 294 places, 518 transitions, 6315 flow [2024-06-21 20:32:58,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6315, PETRI_PLACES=294, PETRI_TRANSITIONS=518} [2024-06-21 20:32:58,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 20:32:58,559 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 518 transitions, 6315 flow [2024-06-21 20:32:58,559 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 20:32:58,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:58,559 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 20:32:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:32:58,560 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 20:32:58,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1114186637, now seen corresponding path program 3 times [2024-06-21 20:32:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858776120] [2024-06-21 20:32:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:59,450 INFO 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 20:32:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858776120] [2024-06-21 20:32:59,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858776120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:59,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:59,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528752312] [2024-06-21 20:32:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:59,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:59,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:32:59,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 518 transitions, 6315 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 20:32:59,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:59,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:32:59,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:01,158 INFO L124 PetriNetUnfolderBase]: 3775/6019 cut-off events. [2024-06-21 20:33:01,158 INFO L125 PetriNetUnfolderBase]: For 573415/573419 co-relation queries the response was YES. [2024-06-21 20:33:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50717 conditions, 6019 events. 3775/6019 cut-off events. For 573415/573419 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36707 event pairs, 1119 based on Foata normal form. 24/6042 useless extension candidates. Maximal degree in co-relation 50591. Up to 5313 conditions per place. [2024-06-21 20:33:01,237 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 480 selfloop transitions, 86 changer transitions 0/571 dead transitions. [2024-06-21 20:33:01,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 571 transitions, 7735 flow [2024-06-21 20:33:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:33:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:33:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 249 transitions. [2024-06-21 20:33:01,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44543828264758495 [2024-06-21 20:33:01,238 INFO L175 Difference]: Start difference. First operand has 294 places, 518 transitions, 6315 flow. Second operand 13 states and 249 transitions. [2024-06-21 20:33:01,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 571 transitions, 7735 flow [2024-06-21 20:33:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 571 transitions, 7569 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 20:33:01,957 INFO L231 Difference]: Finished difference. Result has 299 places, 518 transitions, 6328 flow [2024-06-21 20:33:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6328, PETRI_PLACES=299, PETRI_TRANSITIONS=518} [2024-06-21 20:33:01,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-21 20:33:01,958 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 518 transitions, 6328 flow [2024-06-21 20:33:01,958 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 20:33:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:01,958 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 20:33:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:33:01,958 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 20:33:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1376070297, now seen corresponding path program 4 times [2024-06-21 20:33:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363837970] [2024-06-21 20:33:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:02,788 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 20:33:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363837970] [2024-06-21 20:33:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363837970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:02,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:02,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:02,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93903602] [2024-06-21 20:33:02,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:02,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:02,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:02,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:02,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:02,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:02,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 518 transitions, 6328 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 20:33:02,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:02,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:02,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:04,631 INFO L124 PetriNetUnfolderBase]: 4179/6684 cut-off events. [2024-06-21 20:33:04,631 INFO L125 PetriNetUnfolderBase]: For 650049/650053 co-relation queries the response was YES. [2024-06-21 20:33:04,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57309 conditions, 6684 events. 4179/6684 cut-off events. For 650049/650053 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41593 event pairs, 896 based on Foata normal form. 20/6703 useless extension candidates. Maximal degree in co-relation 57181. Up to 4433 conditions per place. [2024-06-21 20:33:04,729 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 448 selfloop transitions, 136 changer transitions 0/589 dead transitions. [2024-06-21 20:33:04,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 589 transitions, 8474 flow [2024-06-21 20:33:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:33:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:33:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-21 20:33:04,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 20:33:04,731 INFO L175 Difference]: Start difference. First operand has 299 places, 518 transitions, 6328 flow. Second operand 12 states and 243 transitions. [2024-06-21 20:33:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 589 transitions, 8474 flow [2024-06-21 20:33:05,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 589 transitions, 8279 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:33:05,553 INFO L231 Difference]: Finished difference. Result has 300 places, 526 transitions, 6722 flow [2024-06-21 20:33:05,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6722, PETRI_PLACES=300, PETRI_TRANSITIONS=526} [2024-06-21 20:33:05,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 20:33:05,554 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 526 transitions, 6722 flow [2024-06-21 20:33:05,554 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 20:33:05,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:05,554 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 20:33:05,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:33:05,554 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 20:33:05,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 468399723, now seen corresponding path program 5 times [2024-06-21 20:33:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954423905] [2024-06-21 20:33:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:06,488 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 20:33:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954423905] [2024-06-21 20:33:06,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954423905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:06,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:06,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117070443] [2024-06-21 20:33:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:06,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:06,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:06,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 526 transitions, 6722 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 20:33:06,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:06,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:06,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:08,468 INFO L124 PetriNetUnfolderBase]: 4743/7658 cut-off events. [2024-06-21 20:33:08,468 INFO L125 PetriNetUnfolderBase]: For 808621/808625 co-relation queries the response was YES. [2024-06-21 20:33:08,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68527 conditions, 7658 events. 4743/7658 cut-off events. For 808621/808625 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49708 event pairs, 1516 based on Foata normal form. 28/7685 useless extension candidates. Maximal degree in co-relation 68397. Up to 6143 conditions per place. [2024-06-21 20:33:08,571 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 98 changer transitions 0/601 dead transitions. [2024-06-21 20:33:08,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 601 transitions, 8948 flow [2024-06-21 20:33:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:33:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:33:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-21 20:33:08,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:33:08,573 INFO L175 Difference]: Start difference. First operand has 300 places, 526 transitions, 6722 flow. Second operand 12 states and 238 transitions. [2024-06-21 20:33:08,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 601 transitions, 8948 flow [2024-06-21 20:33:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 601 transitions, 8685 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:09,537 INFO L231 Difference]: Finished difference. Result has 307 places, 544 transitions, 7276 flow [2024-06-21 20:33:09,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7276, PETRI_PLACES=307, PETRI_TRANSITIONS=544} [2024-06-21 20:33:09,537 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 20:33:09,538 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 544 transitions, 7276 flow [2024-06-21 20:33:09,538 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 20:33:09,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:09,538 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 20:33:09,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:33:09,538 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 20:33:09,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 872978843, now seen corresponding path program 6 times [2024-06-21 20:33:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:09,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346960115] [2024-06-21 20:33:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:10,483 INFO 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 20:33:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346960115] [2024-06-21 20:33:10,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346960115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:10,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:10,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214469461] [2024-06-21 20:33:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:10,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:10,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 544 transitions, 7276 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 20:33:10,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:10,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:10,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:12,511 INFO L124 PetriNetUnfolderBase]: 4859/7887 cut-off events. [2024-06-21 20:33:12,511 INFO L125 PetriNetUnfolderBase]: For 850119/850123 co-relation queries the response was YES. [2024-06-21 20:33:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69639 conditions, 7887 events. 4859/7887 cut-off events. For 850119/850123 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51806 event pairs, 1799 based on Foata normal form. 44/7930 useless extension candidates. Maximal degree in co-relation 69505. Up to 6938 conditions per place. [2024-06-21 20:33:12,613 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 511 selfloop transitions, 74 changer transitions 0/590 dead transitions. [2024-06-21 20:33:12,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 590 transitions, 8817 flow [2024-06-21 20:33:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:33:12,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 20:33:12,614 INFO L175 Difference]: Start difference. First operand has 307 places, 544 transitions, 7276 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:33:12,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 590 transitions, 8817 flow [2024-06-21 20:33:13,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 590 transitions, 8691 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:13,948 INFO L231 Difference]: Finished difference. Result has 312 places, 547 transitions, 7481 flow [2024-06-21 20:33:13,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7150, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7481, PETRI_PLACES=312, PETRI_TRANSITIONS=547} [2024-06-21 20:33:13,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 20:33:13,949 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 547 transitions, 7481 flow [2024-06-21 20:33:13,949 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 20:33:13,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:13,949 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 20:33:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:33:13,949 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 20:33:13,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash -785574223, now seen corresponding path program 7 times [2024-06-21 20:33:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:13,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669277102] [2024-06-21 20:33:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:14,913 INFO 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 20:33:14,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:14,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669277102] [2024-06-21 20:33:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669277102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:14,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:14,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280850117] [2024-06-21 20:33:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:14,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:14,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:15,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:15,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 547 transitions, 7481 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 20:33:15,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:15,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:15,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:16,939 INFO L124 PetriNetUnfolderBase]: 4795/7778 cut-off events. [2024-06-21 20:33:16,939 INFO L125 PetriNetUnfolderBase]: For 783507/783511 co-relation queries the response was YES. [2024-06-21 20:33:17,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66799 conditions, 7778 events. 4795/7778 cut-off events. For 783507/783511 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50901 event pairs, 1640 based on Foata normal form. 36/7813 useless extension candidates. Maximal degree in co-relation 66663. Up to 6533 conditions per place. [2024-06-21 20:33:17,038 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 507 selfloop transitions, 84 changer transitions 0/596 dead transitions. [2024-06-21 20:33:17,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 596 transitions, 8913 flow [2024-06-21 20:33:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 20:33:17,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-21 20:33:17,040 INFO L175 Difference]: Start difference. First operand has 312 places, 547 transitions, 7481 flow. Second operand 11 states and 217 transitions. [2024-06-21 20:33:17,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 596 transitions, 8913 flow [2024-06-21 20:33:18,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 596 transitions, 8612 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-21 20:33:18,251 INFO L231 Difference]: Finished difference. Result has 314 places, 547 transitions, 7361 flow [2024-06-21 20:33:18,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7180, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7361, PETRI_PLACES=314, PETRI_TRANSITIONS=547} [2024-06-21 20:33:18,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 20:33:18,252 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 547 transitions, 7361 flow [2024-06-21 20:33:18,252 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 20:33:18,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:18,252 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 20:33:18,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:33:18,252 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 20:33:18,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:18,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1697712089, now seen corresponding path program 8 times [2024-06-21 20:33:18,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:18,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565319083] [2024-06-21 20:33:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:18,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:19,206 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 20:33:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565319083] [2024-06-21 20:33:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565319083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:19,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:19,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461786761] [2024-06-21 20:33:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 547 transitions, 7361 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 20:33:19,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:19,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:21,504 INFO L124 PetriNetUnfolderBase]: 5146/8334 cut-off events. [2024-06-21 20:33:21,504 INFO L125 PetriNetUnfolderBase]: For 754851/754856 co-relation queries the response was YES. [2024-06-21 20:33:21,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68483 conditions, 8334 events. 5146/8334 cut-off events. For 754851/754856 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 55362 event pairs, 1454 based on Foata normal form. 22/8352 useless extension candidates. Maximal degree in co-relation 68346. Up to 6505 conditions per place. [2024-06-21 20:33:21,607 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 283 changer transitions 0/653 dead transitions. [2024-06-21 20:33:21,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 9330 flow [2024-06-21 20:33:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 20:33:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799154334038055 [2024-06-21 20:33:21,608 INFO L175 Difference]: Start difference. First operand has 314 places, 547 transitions, 7361 flow. Second operand 11 states and 227 transitions. [2024-06-21 20:33:21,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 9330 flow [2024-06-21 20:33:22,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 653 transitions, 9101 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 20:33:22,646 INFO L231 Difference]: Finished difference. Result has 317 places, 598 transitions, 8185 flow [2024-06-21 20:33:22,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8185, PETRI_PLACES=317, PETRI_TRANSITIONS=598} [2024-06-21 20:33:22,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 20:33:22,648 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 598 transitions, 8185 flow [2024-06-21 20:33:22,648 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 20:33:22,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:22,648 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 20:33:22,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:33:22,648 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 20:33:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 151893667, now seen corresponding path program 9 times [2024-06-21 20:33:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:22,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534267433] [2024-06-21 20:33:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:23,598 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 20:33:23,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534267433] [2024-06-21 20:33:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534267433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:23,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503682273] [2024-06-21 20:33:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:23,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:23,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 598 transitions, 8185 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 20:33:23,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:23,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:23,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:25,907 INFO L124 PetriNetUnfolderBase]: 5221/8458 cut-off events. [2024-06-21 20:33:25,907 INFO L125 PetriNetUnfolderBase]: For 779824/779829 co-relation queries the response was YES. [2024-06-21 20:33:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70825 conditions, 8458 events. 5221/8458 cut-off events. For 779824/779829 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56295 event pairs, 1475 based on Foata normal form. 22/8476 useless extension candidates. Maximal degree in co-relation 70685. Up to 6630 conditions per place. [2024-06-21 20:33:26,023 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 373 selfloop transitions, 277 changer transitions 0/655 dead transitions. [2024-06-21 20:33:26,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 655 transitions, 9897 flow [2024-06-21 20:33:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 20:33:26,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48414376321353064 [2024-06-21 20:33:26,025 INFO L175 Difference]: Start difference. First operand has 317 places, 598 transitions, 8185 flow. Second operand 11 states and 229 transitions. [2024-06-21 20:33:26,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 655 transitions, 9897 flow [2024-06-21 20:33:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 655 transitions, 9518 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:27,266 INFO L231 Difference]: Finished difference. Result has 323 places, 599 transitions, 8423 flow [2024-06-21 20:33:27,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8423, PETRI_PLACES=323, PETRI_TRANSITIONS=599} [2024-06-21 20:33:27,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 20:33:27,268 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 599 transitions, 8423 flow [2024-06-21 20:33:27,268 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 20:33:27,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:27,268 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 20:33:27,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:33:27,269 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:27,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash 151889947, now seen corresponding path program 10 times [2024-06-21 20:33:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028375629] [2024-06-21 20:33:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028375629] [2024-06-21 20:33:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028375629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:28,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291656901] [2024-06-21 20:33:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:28,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:28,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:28,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 599 transitions, 8423 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 20:33:28,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:28,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:28,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:30,695 INFO L124 PetriNetUnfolderBase]: 5279/8569 cut-off events. [2024-06-21 20:33:30,695 INFO L125 PetriNetUnfolderBase]: For 794713/794718 co-relation queries the response was YES. [2024-06-21 20:33:30,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71728 conditions, 8569 events. 5279/8569 cut-off events. For 794713/794718 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 57323 event pairs, 1473 based on Foata normal form. 18/8583 useless extension candidates. Maximal degree in co-relation 71587. Up to 6482 conditions per place. [2024-06-21 20:33:30,805 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 373 selfloop transitions, 281 changer transitions 0/659 dead transitions. [2024-06-21 20:33:30,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 659 transitions, 10167 flow [2024-06-21 20:33:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-21 20:33:30,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:33:30,806 INFO L175 Difference]: Start difference. First operand has 323 places, 599 transitions, 8423 flow. Second operand 11 states and 231 transitions. [2024-06-21 20:33:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 659 transitions, 10167 flow [2024-06-21 20:33:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 659 transitions, 9623 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:32,207 INFO L231 Difference]: Finished difference. Result has 327 places, 600 transitions, 8506 flow [2024-06-21 20:33:32,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7879, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8506, PETRI_PLACES=327, PETRI_TRANSITIONS=600} [2024-06-21 20:33:32,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 20:33:32,208 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 600 transitions, 8506 flow [2024-06-21 20:33:32,208 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 20:33:32,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:32,209 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 20:33:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:33:32,209 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash 157615678, now seen corresponding path program 1 times [2024-06-21 20:33:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243408132] [2024-06-21 20:33:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:33,350 INFO 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 20:33:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243408132] [2024-06-21 20:33:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243408132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:33,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:33,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:33,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928767101] [2024-06-21 20:33:33,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:33,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:33,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:33,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:33,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 600 transitions, 8506 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 20:33:33,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:33,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:33,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:35,690 INFO L124 PetriNetUnfolderBase]: 5296/8603 cut-off events. [2024-06-21 20:33:35,690 INFO L125 PetriNetUnfolderBase]: For 790108/790115 co-relation queries the response was YES. [2024-06-21 20:33:35,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72005 conditions, 8603 events. 5296/8603 cut-off events. For 790108/790115 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 57661 event pairs, 1775 based on Foata normal form. 8/8607 useless extension candidates. Maximal degree in co-relation 71863. Up to 7523 conditions per place. [2024-06-21 20:33:35,796 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 494 selfloop transitions, 157 changer transitions 0/656 dead transitions. [2024-06-21 20:33:35,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 656 transitions, 10243 flow [2024-06-21 20:33:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:33:35,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 20:33:35,797 INFO L175 Difference]: Start difference. First operand has 327 places, 600 transitions, 8506 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:33:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 656 transitions, 10243 flow [2024-06-21 20:33:37,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 656 transitions, 9632 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 20:33:37,144 INFO L231 Difference]: Finished difference. Result has 331 places, 615 transitions, 8495 flow [2024-06-21 20:33:37,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7903, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8495, PETRI_PLACES=331, PETRI_TRANSITIONS=615} [2024-06-21 20:33:37,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-21 20:33:37,145 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 615 transitions, 8495 flow [2024-06-21 20:33:37,145 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 20:33:37,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:37,145 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 20:33:37,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:33:37,145 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:37,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -5624401, now seen corresponding path program 1 times [2024-06-21 20:33:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:37,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192894546] [2024-06-21 20:33:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:37,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:38,115 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 20:33:38,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:38,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192894546] [2024-06-21 20:33:38,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192894546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:38,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:38,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571037473] [2024-06-21 20:33:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:38,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:38,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:33:38,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 615 transitions, 8495 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 20:33:38,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:38,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:33:38,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:40,156 INFO L124 PetriNetUnfolderBase]: 4769/7955 cut-off events. [2024-06-21 20:33:40,156 INFO L125 PetriNetUnfolderBase]: For 886252/886500 co-relation queries the response was YES. [2024-06-21 20:33:40,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69468 conditions, 7955 events. 4769/7955 cut-off events. For 886252/886500 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55906 event pairs, 1790 based on Foata normal form. 75/7835 useless extension candidates. Maximal degree in co-relation 69323. Up to 6875 conditions per place. [2024-06-21 20:33:40,259 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 461 selfloop transitions, 56 changer transitions 0/642 dead transitions. [2024-06-21 20:33:40,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 642 transitions, 9699 flow [2024-06-21 20:33:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:33:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:33:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:33:40,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-21 20:33:40,260 INFO L175 Difference]: Start difference. First operand has 331 places, 615 transitions, 8495 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:33:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 642 transitions, 9699 flow [2024-06-21 20:33:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 642 transitions, 9244 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-21 20:33:41,527 INFO L231 Difference]: Finished difference. Result has 330 places, 618 transitions, 8217 flow [2024-06-21 20:33:41,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8217, PETRI_PLACES=330, PETRI_TRANSITIONS=618} [2024-06-21 20:33:41,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 20:33:41,528 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 618 transitions, 8217 flow [2024-06-21 20:33:41,528 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 20:33:41,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:41,528 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 20:33:41,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:33:41,528 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 20:33:41,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1506504355, now seen corresponding path program 1 times [2024-06-21 20:33:41,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:41,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683559065] [2024-06-21 20:33:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:41,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:42,540 INFO 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 20:33:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683559065] [2024-06-21 20:33:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683559065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:42,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056672544] [2024-06-21 20:33:42,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:42,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:42,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 618 transitions, 8217 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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 20:33:42,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:42,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:42,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:45,313 INFO L124 PetriNetUnfolderBase]: 6009/9812 cut-off events. [2024-06-21 20:33:45,313 INFO L125 PetriNetUnfolderBase]: For 998841/998843 co-relation queries the response was YES. [2024-06-21 20:33:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83885 conditions, 9812 events. 6009/9812 cut-off events. For 998841/998843 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 67585 event pairs, 1548 based on Foata normal form. 26/9837 useless extension candidates. Maximal degree in co-relation 83742. Up to 7986 conditions per place. [2024-06-21 20:33:45,454 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 589 selfloop transitions, 103 changer transitions 0/697 dead transitions. [2024-06-21 20:33:45,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 697 transitions, 10709 flow [2024-06-21 20:33:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:33:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:33:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-21 20:33:45,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:33:45,456 INFO L175 Difference]: Start difference. First operand has 330 places, 618 transitions, 8217 flow. Second operand 12 states and 238 transitions. [2024-06-21 20:33:45,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 697 transitions, 10709 flow [2024-06-21 20:33:47,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 697 transitions, 10574 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:47,013 INFO L231 Difference]: Finished difference. Result has 338 places, 642 transitions, 8978 flow [2024-06-21 20:33:47,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8082, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8978, PETRI_PLACES=338, PETRI_TRANSITIONS=642} [2024-06-21 20:33:47,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 20:33:47,013 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 642 transitions, 8978 flow [2024-06-21 20:33:47,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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 20:33:47,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:47,014 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 20:33:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:33:47,014 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 20:33:47,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1148503411, now seen corresponding path program 11 times [2024-06-21 20:33:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:47,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18542588] [2024-06-21 20:33:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:48,037 INFO 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 20:33:48,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:48,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18542588] [2024-06-21 20:33:48,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18542588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:48,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:48,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:48,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532701194] [2024-06-21 20:33:48,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:48,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:48,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:48,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 642 transitions, 8978 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 20:33:48,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:48,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:48,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:50,709 INFO L124 PetriNetUnfolderBase]: 6143/10048 cut-off events. [2024-06-21 20:33:50,709 INFO L125 PetriNetUnfolderBase]: For 1068924/1068926 co-relation queries the response was YES. [2024-06-21 20:33:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87312 conditions, 10048 events. 6143/10048 cut-off events. For 1068924/1068926 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 69501 event pairs, 1669 based on Foata normal form. 34/10081 useless extension candidates. Maximal degree in co-relation 87166. Up to 8452 conditions per place. [2024-06-21 20:33:50,860 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 601 selfloop transitions, 88 changer transitions 0/694 dead transitions. [2024-06-21 20:33:50,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 694 transitions, 11040 flow [2024-06-21 20:33:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:33:50,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:33:50,861 INFO L175 Difference]: Start difference. First operand has 338 places, 642 transitions, 8978 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:33:50,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 694 transitions, 11040 flow [2024-06-21 20:33:52,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 694 transitions, 10929 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:52,614 INFO L231 Difference]: Finished difference. Result has 344 places, 645 transitions, 9226 flow [2024-06-21 20:33:52,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8867, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9226, PETRI_PLACES=344, PETRI_TRANSITIONS=645} [2024-06-21 20:33:52,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 20:33:52,614 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 645 transitions, 9226 flow [2024-06-21 20:33:52,615 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 20:33:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:52,615 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 20:33:52,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:33:52,615 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 20:33:52,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -832490051, now seen corresponding path program 12 times [2024-06-21 20:33:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33640721] [2024-06-21 20:33:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:53,630 INFO 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 20:33:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33640721] [2024-06-21 20:33:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33640721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:53,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:53,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758053444] [2024-06-21 20:33:53,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:53,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:53,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 645 transitions, 9226 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 20:33:53,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:53,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:53,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:56,221 INFO L124 PetriNetUnfolderBase]: 6061/9937 cut-off events. [2024-06-21 20:33:56,221 INFO L125 PetriNetUnfolderBase]: For 1004714/1004716 co-relation queries the response was YES. [2024-06-21 20:33:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83468 conditions, 9937 events. 6061/9937 cut-off events. For 1004714/1004716 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 68932 event pairs, 1753 based on Foata normal form. 42/9978 useless extension candidates. Maximal degree in co-relation 83320. Up to 8777 conditions per place. [2024-06-21 20:33:56,366 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 77 changer transitions 0/686 dead transitions. [2024-06-21 20:33:56,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 686 transitions, 10789 flow [2024-06-21 20:33:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:33:56,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 20:33:56,367 INFO L175 Difference]: Start difference. First operand has 344 places, 645 transitions, 9226 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:33:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 686 transitions, 10789 flow [2024-06-21 20:33:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 686 transitions, 10421 flow, removed 90 selfloop flow, removed 10 redundant places. [2024-06-21 20:33:58,105 INFO L231 Difference]: Finished difference. Result has 345 places, 645 transitions, 9029 flow [2024-06-21 20:33:58,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8858, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9029, PETRI_PLACES=345, PETRI_TRANSITIONS=645} [2024-06-21 20:33:58,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-21 20:33:58,106 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 645 transitions, 9029 flow [2024-06-21 20:33:58,106 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 20:33:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:58,106 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 20:33:58,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:33:58,106 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 20:33:58,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1553431077, now seen corresponding path program 13 times [2024-06-21 20:33:58,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:58,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165863305] [2024-06-21 20:33:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:59,080 INFO 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 20:33:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165863305] [2024-06-21 20:33:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165863305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:59,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:59,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:59,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557211122] [2024-06-21 20:33:59,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:59,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:59,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:33:59,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 645 transitions, 9029 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 20:33:59,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:59,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:33:59,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:01,891 INFO L124 PetriNetUnfolderBase]: 6613/10863 cut-off events. [2024-06-21 20:34:01,892 INFO L125 PetriNetUnfolderBase]: For 949964/949969 co-relation queries the response was YES. [2024-06-21 20:34:02,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86740 conditions, 10863 events. 6613/10863 cut-off events. For 949964/949969 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 76838 event pairs, 1647 based on Foata normal form. 22/10881 useless extension candidates. Maximal degree in co-relation 86591. Up to 8401 conditions per place. [2024-06-21 20:34:02,067 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 424 selfloop transitions, 354 changer transitions 0/783 dead transitions. [2024-06-21 20:34:02,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 783 transitions, 11664 flow [2024-06-21 20:34:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-21 20:34:02,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48625792811839325 [2024-06-21 20:34:02,068 INFO L175 Difference]: Start difference. First operand has 345 places, 645 transitions, 9029 flow. Second operand 11 states and 230 transitions. [2024-06-21 20:34:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 783 transitions, 11664 flow [2024-06-21 20:34:03,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 783 transitions, 11463 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 20:34:03,944 INFO L231 Difference]: Finished difference. Result has 347 places, 723 transitions, 10373 flow [2024-06-21 20:34:03,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8828, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10373, PETRI_PLACES=347, PETRI_TRANSITIONS=723} [2024-06-21 20:34:03,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-21 20:34:03,945 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 723 transitions, 10373 flow [2024-06-21 20:34:03,945 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 20:34:03,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:03,945 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 20:34:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:34:03,946 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:03,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1553578947, now seen corresponding path program 14 times [2024-06-21 20:34:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057871683] [2024-06-21 20:34:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:04,908 INFO 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 20:34:04,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057871683] [2024-06-21 20:34:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057871683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:04,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986754982] [2024-06-21 20:34:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:05,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:05,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 723 transitions, 10373 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 20:34:05,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:05,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:05,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:07,884 INFO L124 PetriNetUnfolderBase]: 6869/11284 cut-off events. [2024-06-21 20:34:07,884 INFO L125 PetriNetUnfolderBase]: For 1032431/1032436 co-relation queries the response was YES. [2024-06-21 20:34:08,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93360 conditions, 11284 events. 6869/11284 cut-off events. For 1032431/1032436 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 80408 event pairs, 1655 based on Foata normal form. 18/11298 useless extension candidates. Maximal degree in co-relation 93208. Up to 8403 conditions per place. [2024-06-21 20:34:08,072 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 428 selfloop transitions, 359 changer transitions 0/792 dead transitions. [2024-06-21 20:34:08,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 792 transitions, 12817 flow [2024-06-21 20:34:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-21 20:34:08,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49471458773784355 [2024-06-21 20:34:08,074 INFO L175 Difference]: Start difference. First operand has 347 places, 723 transitions, 10373 flow. Second operand 11 states and 234 transitions. [2024-06-21 20:34:08,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 792 transitions, 12817 flow [2024-06-21 20:34:10,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 792 transitions, 12417 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:10,044 INFO L231 Difference]: Finished difference. Result has 355 places, 727 transitions, 10886 flow [2024-06-21 20:34:10,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9973, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10886, PETRI_PLACES=355, PETRI_TRANSITIONS=727} [2024-06-21 20:34:10,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 20:34:10,046 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 727 transitions, 10886 flow [2024-06-21 20:34:10,046 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 20:34:10,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:10,046 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 20:34:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:34:10,046 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:10,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1548068697, now seen corresponding path program 15 times [2024-06-21 20:34:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:10,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944768796] [2024-06-21 20:34:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:11,097 INFO 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 20:34:11,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:11,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944768796] [2024-06-21 20:34:11,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944768796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:11,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:11,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:11,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999230714] [2024-06-21 20:34:11,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:11,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:11,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 727 transitions, 10886 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 20:34:11,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:14,040 INFO L124 PetriNetUnfolderBase]: 6833/11234 cut-off events. [2024-06-21 20:34:14,040 INFO L125 PetriNetUnfolderBase]: For 1016604/1016609 co-relation queries the response was YES. [2024-06-21 20:34:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91720 conditions, 11234 events. 6833/11234 cut-off events. For 1016604/1016609 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 80148 event pairs, 1692 based on Foata normal form. 22/11252 useless extension candidates. Maximal degree in co-relation 91567. Up to 8765 conditions per place. [2024-06-21 20:34:14,213 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 423 selfloop transitions, 358 changer transitions 0/786 dead transitions. [2024-06-21 20:34:14,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 786 transitions, 12851 flow [2024-06-21 20:34:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 20:34:14,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820295983086681 [2024-06-21 20:34:14,214 INFO L175 Difference]: Start difference. First operand has 355 places, 727 transitions, 10886 flow. Second operand 11 states and 228 transitions. [2024-06-21 20:34:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 786 transitions, 12851 flow [2024-06-21 20:34:16,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 786 transitions, 12373 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:16,220 INFO L231 Difference]: Finished difference. Result has 359 places, 727 transitions, 11136 flow [2024-06-21 20:34:16,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11136, PETRI_PLACES=359, PETRI_TRANSITIONS=727} [2024-06-21 20:34:16,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 20:34:16,221 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 727 transitions, 11136 flow [2024-06-21 20:34:16,221 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 20:34:16,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:16,221 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 20:34:16,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:34:16,222 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:16,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1547853216, now seen corresponding path program 2 times [2024-06-21 20:34:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:16,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528142841] [2024-06-21 20:34:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:17,354 INFO 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 20:34:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528142841] [2024-06-21 20:34:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528142841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:17,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:17,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554884408] [2024-06-21 20:34:17,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:17,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:17,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:17,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 727 transitions, 11136 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 20:34:17,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:17,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:17,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:20,379 INFO L124 PetriNetUnfolderBase]: 6861/11318 cut-off events. [2024-06-21 20:34:20,379 INFO L125 PetriNetUnfolderBase]: For 985145/985152 co-relation queries the response was YES. [2024-06-21 20:34:20,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92888 conditions, 11318 events. 6861/11318 cut-off events. For 985145/985152 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 81236 event pairs, 2188 based on Foata normal form. 8/11322 useless extension candidates. Maximal degree in co-relation 92733. Up to 9889 conditions per place. [2024-06-21 20:34:20,553 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 593 selfloop transitions, 189 changer transitions 0/787 dead transitions. [2024-06-21 20:34:20,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 787 transitions, 13140 flow [2024-06-21 20:34:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:34:20,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 20:34:20,554 INFO L175 Difference]: Start difference. First operand has 359 places, 727 transitions, 11136 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:34:20,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 787 transitions, 13140 flow [2024-06-21 20:34:23,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 787 transitions, 12429 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 20:34:23,122 INFO L231 Difference]: Finished difference. Result has 362 places, 744 transitions, 11044 flow [2024-06-21 20:34:23,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10429, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11044, PETRI_PLACES=362, PETRI_TRANSITIONS=744} [2024-06-21 20:34:23,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 20:34:23,123 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 744 transitions, 11044 flow [2024-06-21 20:34:23,123 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 20:34:23,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:23,123 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 20:34:23,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:34:23,123 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:23,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2106777849, now seen corresponding path program 16 times [2024-06-21 20:34:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:23,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67298098] [2024-06-21 20:34:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:23,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:24,103 INFO 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 20:34:24,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67298098] [2024-06-21 20:34:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67298098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:24,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290040534] [2024-06-21 20:34:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:24,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:24,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 744 transitions, 11044 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 20:34:24,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:24,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:27,427 INFO L124 PetriNetUnfolderBase]: 7006/11519 cut-off events. [2024-06-21 20:34:27,427 INFO L125 PetriNetUnfolderBase]: For 1056951/1056954 co-relation queries the response was YES. [2024-06-21 20:34:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95068 conditions, 11519 events. 7006/11519 cut-off events. For 1056951/1056954 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 82486 event pairs, 1640 based on Foata normal form. 20/11535 useless extension candidates. Maximal degree in co-relation 94911. Up to 9055 conditions per place. [2024-06-21 20:34:27,599 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 429 selfloop transitions, 375 changer transitions 0/809 dead transitions. [2024-06-21 20:34:27,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 809 transitions, 13204 flow [2024-06-21 20:34:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-21 20:34:27,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780126849894294 [2024-06-21 20:34:27,600 INFO L175 Difference]: Start difference. First operand has 362 places, 744 transitions, 11044 flow. Second operand 11 states and 226 transitions. [2024-06-21 20:34:27,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 809 transitions, 13204 flow [2024-06-21 20:34:30,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 809 transitions, 12810 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:30,053 INFO L231 Difference]: Finished difference. Result has 367 places, 759 transitions, 11636 flow [2024-06-21 20:34:30,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10656, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11636, PETRI_PLACES=367, PETRI_TRANSITIONS=759} [2024-06-21 20:34:30,054 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 20:34:30,054 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 759 transitions, 11636 flow [2024-06-21 20:34:30,054 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 20:34:30,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:30,054 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 20:34:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:34:30,054 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:30,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash 331263313, now seen corresponding path program 17 times [2024-06-21 20:34:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890412965] [2024-06-21 20:34:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:31,056 INFO 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 20:34:31,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:31,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890412965] [2024-06-21 20:34:31,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890412965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:31,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:31,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:31,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711222093] [2024-06-21 20:34:31,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:31,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:31,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 759 transitions, 11636 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 20:34:31,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:31,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:31,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:34,514 INFO L124 PetriNetUnfolderBase]: 7081/11642 cut-off events. [2024-06-21 20:34:34,514 INFO L125 PetriNetUnfolderBase]: For 1095626/1095629 co-relation queries the response was YES. [2024-06-21 20:34:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97183 conditions, 11642 events. 7081/11642 cut-off events. For 1095626/1095629 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 83701 event pairs, 1653 based on Foata normal form. 20/11658 useless extension candidates. Maximal degree in co-relation 97025. Up to 9180 conditions per place. [2024-06-21 20:34:34,703 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 451 selfloop transitions, 359 changer transitions 0/815 dead transitions. [2024-06-21 20:34:34,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 815 transitions, 13744 flow [2024-06-21 20:34:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 20:34:34,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48414376321353064 [2024-06-21 20:34:34,705 INFO L175 Difference]: Start difference. First operand has 367 places, 759 transitions, 11636 flow. Second operand 11 states and 229 transitions. [2024-06-21 20:34:34,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 815 transitions, 13744 flow [2024-06-21 20:34:37,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 815 transitions, 13212 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:37,096 INFO L231 Difference]: Finished difference. Result has 374 places, 761 transitions, 11929 flow [2024-06-21 20:34:37,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11104, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11929, PETRI_PLACES=374, PETRI_TRANSITIONS=761} [2024-06-21 20:34:37,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 20:34:37,097 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 761 transitions, 11929 flow [2024-06-21 20:34:37,098 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 20:34:37,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:37,098 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 20:34:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:34:37,098 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:37,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1029594859, now seen corresponding path program 18 times [2024-06-21 20:34:37,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:37,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521901163] [2024-06-21 20:34:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:38,102 INFO 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 20:34:38,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521901163] [2024-06-21 20:34:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521901163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:38,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:38,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448906120] [2024-06-21 20:34:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:38,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:38,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 761 transitions, 11929 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 20:34:38,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:38,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:38,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:41,368 INFO L124 PetriNetUnfolderBase]: 7156/11777 cut-off events. [2024-06-21 20:34:41,368 INFO L125 PetriNetUnfolderBase]: For 1128135/1128138 co-relation queries the response was YES. [2024-06-21 20:34:41,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98473 conditions, 11777 events. 7156/11777 cut-off events. For 1128135/1128138 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 85032 event pairs, 1669 based on Foata normal form. 20/11793 useless extension candidates. Maximal degree in co-relation 98313. Up to 9305 conditions per place. [2024-06-21 20:34:41,571 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 448 selfloop transitions, 361 changer transitions 0/814 dead transitions. [2024-06-21 20:34:41,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 814 transitions, 13990 flow [2024-06-21 20:34:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 20:34:41,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820295983086681 [2024-06-21 20:34:41,573 INFO L175 Difference]: Start difference. First operand has 374 places, 761 transitions, 11929 flow. Second operand 11 states and 228 transitions. [2024-06-21 20:34:41,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 814 transitions, 13990 flow [2024-06-21 20:34:43,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 814 transitions, 13149 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 20:34:43,887 INFO L231 Difference]: Finished difference. Result has 377 places, 762 transitions, 11891 flow [2024-06-21 20:34:43,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11088, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11891, PETRI_PLACES=377, PETRI_TRANSITIONS=762} [2024-06-21 20:34:43,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 20:34:43,888 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 762 transitions, 11891 flow [2024-06-21 20:34:43,888 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 20:34:43,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:43,888 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 20:34:43,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:34:43,888 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:43,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1029598579, now seen corresponding path program 19 times [2024-06-21 20:34:43,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:43,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023948185] [2024-06-21 20:34:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:45,108 INFO 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 20:34:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023948185] [2024-06-21 20:34:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023948185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:45,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:45,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935291711] [2024-06-21 20:34:45,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:45,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:45,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 762 transitions, 11891 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 20:34:45,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:45,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:48,396 INFO L124 PetriNetUnfolderBase]: 7214/11875 cut-off events. [2024-06-21 20:34:48,396 INFO L125 PetriNetUnfolderBase]: For 1139364/1139367 co-relation queries the response was YES. [2024-06-21 20:34:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99240 conditions, 11875 events. 7214/11875 cut-off events. For 1139364/1139367 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 85938 event pairs, 1655 based on Foata normal form. 16/11887 useless extension candidates. Maximal degree in co-relation 99079. Up to 9032 conditions per place. [2024-06-21 20:34:48,639 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 449 selfloop transitions, 364 changer transitions 0/818 dead transitions. [2024-06-21 20:34:48,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 818 transitions, 13983 flow [2024-06-21 20:34:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:34:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:34:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-21 20:34:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48625792811839325 [2024-06-21 20:34:48,641 INFO L175 Difference]: Start difference. First operand has 377 places, 762 transitions, 11891 flow. Second operand 11 states and 230 transitions. [2024-06-21 20:34:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 818 transitions, 13983 flow [2024-06-21 20:34:51,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 818 transitions, 13241 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:51,377 INFO L231 Difference]: Finished difference. Result has 381 places, 763 transitions, 11957 flow [2024-06-21 20:34:51,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11149, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11957, PETRI_PLACES=381, PETRI_TRANSITIONS=763} [2024-06-21 20:34:51,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 20:34:51,378 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 763 transitions, 11957 flow [2024-06-21 20:34:51,378 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 20:34:51,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:51,378 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 20:34:51,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:34:51,379 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 20:34:51,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash -277038578, now seen corresponding path program 1 times [2024-06-21 20:34:51,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601623069] [2024-06-21 20:34:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:52,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601623069] [2024-06-21 20:34:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601623069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:52,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:52,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558720786] [2024-06-21 20:34:52,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:52,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:34:52,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 763 transitions, 11957 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 20:34:52,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:52,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:34:52,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:55,381 INFO L124 PetriNetUnfolderBase]: 7219/11925 cut-off events. [2024-06-21 20:34:55,382 INFO L125 PetriNetUnfolderBase]: For 1111455/1111460 co-relation queries the response was YES. [2024-06-21 20:34:55,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99278 conditions, 11925 events. 7219/11925 cut-off events. For 1111455/1111460 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 87021 event pairs, 2776 based on Foata normal form. 5/11928 useless extension candidates. Maximal degree in co-relation 99116. Up to 11078 conditions per place. [2024-06-21 20:34:55,595 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 748 selfloop transitions, 34 changer transitions 0/787 dead transitions. [2024-06-21 20:34:55,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 787 transitions, 13709 flow [2024-06-21 20:34:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:34:55,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:34:55,596 INFO L175 Difference]: Start difference. First operand has 381 places, 763 transitions, 11957 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:34:55,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 787 transitions, 13709 flow [2024-06-21 20:34:58,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 787 transitions, 12923 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 20:34:58,880 INFO L231 Difference]: Finished difference. Result has 380 places, 766 transitions, 11329 flow [2024-06-21 20:34:58,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11171, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11329, PETRI_PLACES=380, PETRI_TRANSITIONS=766} [2024-06-21 20:34:58,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 20:34:58,881 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 766 transitions, 11329 flow [2024-06-21 20:34:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 20:34:58,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:58,882 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 20:34:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:34:58,882 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:58,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash -708007358, now seen corresponding path program 3 times [2024-06-21 20:34:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064554075] [2024-06-21 20:34:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:00,023 INFO 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 20:35:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064554075] [2024-06-21 20:35:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064554075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:00,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:00,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912439508] [2024-06-21 20:35:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:00,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:00,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:35:00,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 766 transitions, 11329 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 20:35:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:00,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:35:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:04,004 INFO L124 PetriNetUnfolderBase]: 7236/11979 cut-off events. [2024-06-21 20:35:04,004 INFO L125 PetriNetUnfolderBase]: For 1125963/1125970 co-relation queries the response was YES. [2024-06-21 20:35:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98205 conditions, 11979 events. 7236/11979 cut-off events. For 1125963/1125970 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 87506 event pairs, 2216 based on Foata normal form. 8/11983 useless extension candidates. Maximal degree in co-relation 98042. Up to 10492 conditions per place. [2024-06-21 20:35:04,170 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 625 selfloop transitions, 187 changer transitions 0/817 dead transitions. [2024-06-21 20:35:04,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 817 transitions, 13373 flow [2024-06-21 20:35:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:35:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:35:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:35:04,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:35:04,171 INFO L175 Difference]: Start difference. First operand has 380 places, 766 transitions, 11329 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:35:04,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 817 transitions, 13373 flow [2024-06-21 20:35:06,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 817 transitions, 13263 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:35:06,927 INFO L231 Difference]: Finished difference. Result has 388 places, 773 transitions, 11763 flow [2024-06-21 20:35:06,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11763, PETRI_PLACES=388, PETRI_TRANSITIONS=773} [2024-06-21 20:35:06,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 20:35:06,927 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 773 transitions, 11763 flow [2024-06-21 20:35:06,927 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 20:35:06,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:06,928 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 20:35:06,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:35:06,928 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:06,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash -506918108, now seen corresponding path program 4 times [2024-06-21 20:35:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:06,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070396043] [2024-06-21 20:35:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:06,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:08,115 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 20:35:08,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070396043] [2024-06-21 20:35:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070396043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:08,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:08,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:08,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293943189] [2024-06-21 20:35:08,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:35:08,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 773 transitions, 11763 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 20:35:08,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:08,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:35:08,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:12,114 INFO L124 PetriNetUnfolderBase]: 7271/12014 cut-off events. [2024-06-21 20:35:12,114 INFO L125 PetriNetUnfolderBase]: For 1159562/1159569 co-relation queries the response was YES. [2024-06-21 20:35:12,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100467 conditions, 12014 events. 7271/12014 cut-off events. For 1159562/1159569 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 87596 event pairs, 2190 based on Foata normal form. 8/12018 useless extension candidates. Maximal degree in co-relation 100302. Up to 10539 conditions per place. [2024-06-21 20:35:12,293 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 619 selfloop transitions, 205 changer transitions 0/829 dead transitions. [2024-06-21 20:35:12,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 829 transitions, 13947 flow [2024-06-21 20:35:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:35:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:35:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 20:35:12,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-21 20:35:12,294 INFO L175 Difference]: Start difference. First operand has 388 places, 773 transitions, 11763 flow. Second operand 11 states and 217 transitions. [2024-06-21 20:35:12,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 829 transitions, 13947 flow [2024-06-21 20:35:15,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 829 transitions, 13456 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-21 20:35:15,083 INFO L231 Difference]: Finished difference. Result has 389 places, 786 transitions, 11988 flow [2024-06-21 20:35:15,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11312, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11988, PETRI_PLACES=389, PETRI_TRANSITIONS=786} [2024-06-21 20:35:15,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-21 20:35:15,084 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 786 transitions, 11988 flow [2024-06-21 20:35:15,084 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 20:35:15,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:15,084 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 20:35:15,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:35:15,084 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:15,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 525418204, now seen corresponding path program 5 times [2024-06-21 20:35:15,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:15,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311473785] [2024-06-21 20:35:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:16,284 INFO 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 20:35:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311473785] [2024-06-21 20:35:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311473785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:16,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:16,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180298280] [2024-06-21 20:35:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:16,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:16,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:16,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:35:16,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 786 transitions, 11988 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 20:35:16,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:16,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:35:16,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:20,240 INFO L124 PetriNetUnfolderBase]: 7288/12066 cut-off events. [2024-06-21 20:35:20,240 INFO L125 PetriNetUnfolderBase]: For 1188802/1188809 co-relation queries the response was YES. [2024-06-21 20:35:20,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101793 conditions, 12066 events. 7288/12066 cut-off events. For 1188802/1188809 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 88341 event pairs, 2224 based on Foata normal form. 8/12070 useless extension candidates. Maximal degree in co-relation 101629. Up to 10566 conditions per place. [2024-06-21 20:35:20,426 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 624 selfloop transitions, 201 changer transitions 0/830 dead transitions. [2024-06-21 20:35:20,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 830 transitions, 13988 flow [2024-06-21 20:35:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:35:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:35:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:35:20,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 20:35:20,427 INFO L175 Difference]: Start difference. First operand has 389 places, 786 transitions, 11988 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:35:20,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 830 transitions, 13988 flow [2024-06-21 20:35:23,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 830 transitions, 13550 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:23,428 INFO L231 Difference]: Finished difference. Result has 394 places, 788 transitions, 12068 flow [2024-06-21 20:35:23,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11562, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12068, PETRI_PLACES=394, PETRI_TRANSITIONS=788} [2024-06-21 20:35:23,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-21 20:35:23,428 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 788 transitions, 12068 flow [2024-06-21 20:35:23,428 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 20:35:23,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:23,428 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 20:35:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:35:23,429 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 532836814, now seen corresponding path program 6 times [2024-06-21 20:35:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928593043] [2024-06-21 20:35:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:24,602 INFO 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 20:35:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928593043] [2024-06-21 20:35:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928593043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:24,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:24,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290986826] [2024-06-21 20:35:24,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:24,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:24,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:35:24,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 788 transitions, 12068 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 20:35:24,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:24,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:35:24,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:28,501 INFO L124 PetriNetUnfolderBase]: 7305/12082 cut-off events. [2024-06-21 20:35:28,502 INFO L125 PetriNetUnfolderBase]: For 1208660/1208667 co-relation queries the response was YES. [2024-06-21 20:35:28,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100075 conditions, 12082 events. 7305/12082 cut-off events. For 1208660/1208667 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 88363 event pairs, 2191 based on Foata normal form. 8/12086 useless extension candidates. Maximal degree in co-relation 99910. Up to 10461 conditions per place. [2024-06-21 20:35:28,686 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 611 selfloop transitions, 218 changer transitions 0/834 dead transitions. [2024-06-21 20:35:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 834 transitions, 14094 flow [2024-06-21 20:35:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:35:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:35:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:35:28,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 20:35:28,687 INFO L175 Difference]: Start difference. First operand has 394 places, 788 transitions, 12068 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:35:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 834 transitions, 14094 flow [2024-06-21 20:35:31,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 834 transitions, 13562 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-21 20:35:31,411 INFO L231 Difference]: Finished difference. Result has 395 places, 790 transitions, 12079 flow [2024-06-21 20:35:31,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11536, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12079, PETRI_PLACES=395, PETRI_TRANSITIONS=790} [2024-06-21 20:35:31,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-21 20:35:31,412 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 790 transitions, 12079 flow [2024-06-21 20:35:31,412 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 20:35:31,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:31,412 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 20:35:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:35:31,413 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 20:35:31,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -114924156, now seen corresponding path program 2 times [2024-06-21 20:35:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356906458] [2024-06-21 20:35:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:32,345 INFO 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 20:35:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:32,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356906458] [2024-06-21 20:35:32,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356906458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:32,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:32,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:32,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330340961] [2024-06-21 20:35:32,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:32,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:32,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:32,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:35:32,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 790 transitions, 12079 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 20:35:32,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:32,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:35:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:35,982 INFO L124 PetriNetUnfolderBase]: 7318/12073 cut-off events. [2024-06-21 20:35:35,982 INFO L125 PetriNetUnfolderBase]: For 1224464/1224469 co-relation queries the response was YES. [2024-06-21 20:35:36,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100650 conditions, 12073 events. 7318/12073 cut-off events. For 1224464/1224469 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 88033 event pairs, 2743 based on Foata normal form. 5/12076 useless extension candidates. Maximal degree in co-relation 100485. Up to 11218 conditions per place. [2024-06-21 20:35:36,177 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 768 selfloop transitions, 42 changer transitions 0/815 dead transitions. [2024-06-21 20:35:36,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 815 transitions, 14135 flow [2024-06-21 20:35:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:35:36,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:35:36,178 INFO L175 Difference]: Start difference. First operand has 395 places, 790 transitions, 12079 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:35:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 815 transitions, 14135 flow