./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.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/safe002_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:30:37,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:30:37,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:30:37,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:30:37,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:30:37,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:30:37,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:30:37,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:30:37,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:30:37,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:30:37,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:30:37,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:30:37,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:30:37,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:30:37,499 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:30:37,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:30:37,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:30:37,500 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:30:37,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:30:37,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:30:37,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:30:37,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:30:37,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:30:37,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:30:37,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:30:37,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:30:37,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:30:37,502 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:30:37,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:30:37,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:30:37,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:30:37,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:30:37,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:30:37,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:30:37,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:30:37,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:30:37,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:30:37,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:30:37,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:30:37,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:30:37,759 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:30:37,760 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:30:37,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.yml/witness.yml [2024-06-21 21:30:37,940 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:30:37,942 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:30:37,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-21 21:30:38,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:30:39,081 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:30:39,082 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-21 21:30:39,095 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c7efa8e/a684cc7b2e324e038f74fb09573d52c5/FLAG0e54eb3d3 [2024-06-21 21:30:39,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c7efa8e/a684cc7b2e324e038f74fb09573d52c5 [2024-06-21 21:30:39,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:30:39,108 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:30:39,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:30:39,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:30:39,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:30:39,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:37" (1/2) ... [2024-06-21 21:30:39,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5d1df6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:39, skipping insertion in model container [2024-06-21 21:30:39,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:37" (1/2) ... [2024-06-21 21:30:39,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43279386 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:30:39, skipping insertion in model container [2024-06-21 21:30:39,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:30:39" (2/2) ... [2024-06-21 21:30:39,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5d1df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39, skipping insertion in model container [2024-06-21 21:30:39,116 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:30:39" (2/2) ... [2024-06-21 21:30:39,116 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:30:39,242 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:30:39,243 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:30:39,243 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:30:39,243 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:30:39,244 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:30:39,244 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 21:30:39,281 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:30:39,592 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:30:39,600 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:30:39,727 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:30:39,761 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:30:39,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39 WrapperNode [2024-06-21 21:30:39,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:30:39,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:30:39,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:30:39,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:30:39,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,790 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,818 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-21 21:30:39,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:30:39,819 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:30:39,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:30:39,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:30:39,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,833 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,850 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 21:30:39,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,878 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,881 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,883 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:30:39,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:30:39,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:30:39,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:30:39,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (1/1) ... [2024-06-21 21:30:39,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:30:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:30:39,918 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 21:30:39,940 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 21:30:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:30:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:30:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:30:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:30:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:30:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:30:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:30:39,991 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:30:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:30:39,991 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:30:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:30:39,991 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:30:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:30:39,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:30:39,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:30:39,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:30:39,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:30:39,993 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 21:30:40,170 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:30:40,172 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:30:40,704 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:30:40,704 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:30:41,126 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:30:41,127 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:30:41,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:30:41 BoogieIcfgContainer [2024-06-21 21:30:41,127 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:30:41,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:30:41,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:30:41,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:30:41,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:30:37" (1/4) ... [2024-06-21 21:30:41,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0393b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:30:41, skipping insertion in model container [2024-06-21 21:30:41,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:30:39" (2/4) ... [2024-06-21 21:30:41,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0393b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:30:41, skipping insertion in model container [2024-06-21 21:30:41,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:30:39" (3/4) ... [2024-06-21 21:30:41,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0393b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:30:41, skipping insertion in model container [2024-06-21 21:30:41,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:30:41" (4/4) ... [2024-06-21 21:30:41,137 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.oepc.i [2024-06-21 21:30:41,155 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:30:41,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:30:41,155 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:30:41,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:30:41,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:30:41,292 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:30:41,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:30:41,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:30:41,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:30:41,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:30:41,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:30:41,312 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;@6e666f78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:30:41,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:30:41,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:30:41,317 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:30:41,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:30:41,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:41,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:30:41,318 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 21:30:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash 990473450, now seen corresponding path program 1 times [2024-06-21 21:30:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256252399] [2024-06-21 21:30:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256252399] [2024-06-21 21:30:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256252399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:30:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338522287] [2024-06-21 21:30:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:30:43,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:30:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:30:43,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:30:43,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:43,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:30:43,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:43,656 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-21 21:30:43,656 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 21:30:43,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8205 event pairs, 643 based on Foata normal form. 2/1664 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-21 21:30:43,667 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 21:30:43,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-21 21:30:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:30:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:30:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 21:30:43,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 21:30:43,679 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-21 21:30:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-21 21:30:43,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:43,685 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:30:43,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:30:43,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:30:43,689 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:30:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:43,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:30:43,690 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 21:30:43,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1636617571, now seen corresponding path program 1 times [2024-06-21 21:30:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:43,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120241367] [2024-06-21 21:30:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:45,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120241367] [2024-06-21 21:30:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120241367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:45,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:45,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:30:45,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863703699] [2024-06-21 21:30:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:45,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:30:45,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:30:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:30:45,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:30:45,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:45,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:45,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:30:45,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:46,602 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-21 21:30:46,603 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-21 21:30:46,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8163 event pairs, 496 based on Foata normal form. 4/1685 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-21 21:30:46,610 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 21:30:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-21 21:30:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:30:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:30:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 21:30:46,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 21:30:46,612 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-21 21:30:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-21 21:30:46,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:30:46,614 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:30:46,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:30:46,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:30:46,615 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:30:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:46,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:30:46,616 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 21:30:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -3974875, now seen corresponding path program 1 times [2024-06-21 21:30:46,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-21 21:30:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:49,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-21 21:30:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526427843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:49,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:49,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:30:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478896718] [2024-06-21 21:30:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:49,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:30:49,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:30:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:30:49,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:49,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:49,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:49,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:49,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:50,047 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-21 21:30:50,047 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-21 21:30:50,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9762 event pairs, 416 based on Foata normal form. 8/2097 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-21 21:30:50,057 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 21:30:50,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-21 21:30:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:30:50,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:30:50,060 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:30:50,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-21 21:30:50,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:30:50,062 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 21:30:50,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:30:50,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 21:30:50,063 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 21:30:50,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:50,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:50,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:50,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:30:50,064 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 21:30:50,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1880971802, now seen corresponding path program 1 times [2024-06-21 21:30:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:50,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679362378] [2024-06-21 21:30:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:50,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:51,429 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 21:30:51,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:51,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679362378] [2024-06-21 21:30:51,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679362378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:51,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:51,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:30:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686575387] [2024-06-21 21:30:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:30:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:30:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:30:51,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:51,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 21:30:51,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:51,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:51,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:52,270 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-21 21:30:52,270 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-21 21:30:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9771 event pairs, 527 based on Foata normal form. 3/2081 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-21 21:30:52,280 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-21 21:30:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-21 21:30:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:30:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:30:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 21:30:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:30:52,282 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-21 21:30:52,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-21 21:30:52,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:52,294 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 21:30:52,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, 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=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 21:30:52,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 21:30:52,295 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 21:30:52,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 21:30:52,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:52,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:52,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:30:52,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:52,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:52,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1819418535, now seen corresponding path program 1 times [2024-06-21 21:30:52,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:52,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958096744] [2024-06-21 21:30:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:52,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958096744] [2024-06-21 21:30:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958096744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:53,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:53,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705235651] [2024-06-21 21:30:53,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:53,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:53,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:53,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:53,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:53,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:54,988 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-21 21:30:54,990 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2024-06-21 21:30:54,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9505 event pairs, 566 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-21 21:30:55,002 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 21:30:55,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-21 21:30:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:30:55,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:30:55,007 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:30:55,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-21 21:30:55,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:55,015 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-21 21:30:55,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 21:30:55,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:30:55,017 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-21 21:30:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:55,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:55,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:30:55,018 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 21:30:55,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash 118390085, now seen corresponding path program 1 times [2024-06-21 21:30:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084255901] [2024-06-21 21:30:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:55,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:57,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:57,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084255901] [2024-06-21 21:30:57,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084255901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:57,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:57,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061479696] [2024-06-21 21:30:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:57,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:57,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:57,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:57,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:57,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:58,371 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-21 21:30:58,371 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-21 21:30:58,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9811 event pairs, 507 based on Foata normal form. 5/2096 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-21 21:30:58,381 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 21:30:58,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-21 21:30:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:30:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:30:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:30:58,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:30:58,383 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:30:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-21 21:30:58,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:30:58,388 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-21 21:30:58,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 21:30:58,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 21:30:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-21 21:30:58,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:58,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:58,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:58,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:30:58,392 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 21:30:58,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 582587495, now seen corresponding path program 2 times [2024-06-21 21:30:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:58,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481395561] [2024-06-21 21:30:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:58,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:00,483 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 21:31:00,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481395561] [2024-06-21 21:31:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481395561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835342378] [2024-06-21 21:31:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:00,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:00,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:00,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:00,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:00,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:01,631 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-21 21:31:01,631 INFO L125 PetriNetUnfolderBase]: For 5638/5640 co-relation queries the response was YES. [2024-06-21 21:31:01,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5640 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9756 event pairs, 510 based on Foata normal form. 5/2086 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-21 21:31:01,646 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 21:31:01,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-21 21:31:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:31:01,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:31:01,648 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:31:01,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-21 21:31:01,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:01,654 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-21 21:31:01,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:31:01,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:31:01,655 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-21 21:31:01,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:01,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:01,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:01,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:31:01,656 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 21:31:01,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1697896414, now seen corresponding path program 1 times [2024-06-21 21:31:01,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:01,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845817661] [2024-06-21 21:31:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:01,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845817661] [2024-06-21 21:31:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845817661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:04,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342217838] [2024-06-21 21:31:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:04,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:04,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:04,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:04,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:04,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:05,170 INFO L124 PetriNetUnfolderBase]: 1447/2205 cut-off events. [2024-06-21 21:31:05,170 INFO L125 PetriNetUnfolderBase]: For 6827/6829 co-relation queries the response was YES. [2024-06-21 21:31:05,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 2205 events. 1447/2205 cut-off events. For 6827/6829 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10340 event pairs, 504 based on Foata normal form. 5/2210 useless extension candidates. Maximal degree in co-relation 7874. Up to 2064 conditions per place. [2024-06-21 21:31:05,180 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-21 21:31:05,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 767 flow [2024-06-21 21:31:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:31:05,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:31:05,181 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:31:05,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 767 flow [2024-06-21 21:31:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 703 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:05,188 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 477 flow [2024-06-21 21:31:05,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-21 21:31:05,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:31:05,188 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 477 flow [2024-06-21 21:31:05,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:05,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:05,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:31:05,189 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 21:31:05,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash 402915778, now seen corresponding path program 2 times [2024-06-21 21:31:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997342933] [2024-06-21 21:31:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:07,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:07,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997342933] [2024-06-21 21:31:07,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997342933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:07,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133299203] [2024-06-21 21:31:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:07,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:07,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:07,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:07,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:07,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:09,044 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2024-06-21 21:31:09,045 INFO L125 PetriNetUnfolderBase]: For 8828/8832 co-relation queries the response was YES. [2024-06-21 21:31:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 2243 events. 1465/2243 cut-off events. For 8828/8832 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10639 event pairs, 486 based on Foata normal form. 7/2250 useless extension candidates. Maximal degree in co-relation 8664. Up to 2064 conditions per place. [2024-06-21 21:31:09,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-21 21:31:09,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 839 flow [2024-06-21 21:31:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:31:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:31:09,057 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 477 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:31:09,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 839 flow [2024-06-21 21:31:09,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 793 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:09,064 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 534 flow [2024-06-21 21:31:09,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 21:31:09,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 21:31:09,067 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 534 flow [2024-06-21 21:31:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:09,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:09,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:09,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:31:09,067 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 21:31:09,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 402920428, now seen corresponding path program 3 times [2024-06-21 21:31:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:09,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217620291] [2024-06-21 21:31:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217620291] [2024-06-21 21:31:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217620291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:11,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:11,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961008315] [2024-06-21 21:31:11,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:11,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:11,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:11,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:11,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:11,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:13,030 INFO L124 PetriNetUnfolderBase]: 1601/2462 cut-off events. [2024-06-21 21:31:13,030 INFO L125 PetriNetUnfolderBase]: For 12508/12512 co-relation queries the response was YES. [2024-06-21 21:31:13,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10203 conditions, 2462 events. 1601/2462 cut-off events. For 12508/12512 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11939 event pairs, 824 based on Foata normal form. 5/2467 useless extension candidates. Maximal degree in co-relation 10173. Up to 2199 conditions per place. [2024-06-21 21:31:13,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2024-06-21 21:31:13,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 1193 flow [2024-06-21 21:31:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:31:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:31:13,045 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 534 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:31:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 1193 flow [2024-06-21 21:31:13,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 138 transitions, 1086 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:13,055 INFO L231 Difference]: Finished difference. Result has 80 places, 105 transitions, 846 flow [2024-06-21 21:31:13,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=846, PETRI_PLACES=80, PETRI_TRANSITIONS=105} [2024-06-21 21:31:13,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 21:31:13,056 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 105 transitions, 846 flow [2024-06-21 21:31:13,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:13,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:13,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:13,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:31:13,057 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 21:31:13,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 601806412, now seen corresponding path program 4 times [2024-06-21 21:31:13,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:13,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328700729] [2024-06-21 21:31:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328700729] [2024-06-21 21:31:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328700729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:15,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:15,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462945745] [2024-06-21 21:31:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:15,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:15,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:15,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:15,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:15,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:15,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 105 transitions, 846 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:15,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:15,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:16,983 INFO L124 PetriNetUnfolderBase]: 1711/2614 cut-off events. [2024-06-21 21:31:16,983 INFO L125 PetriNetUnfolderBase]: For 16230/16234 co-relation queries the response was YES. [2024-06-21 21:31:16,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11761 conditions, 2614 events. 1711/2614 cut-off events. For 16230/16234 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12667 event pairs, 527 based on Foata normal form. 7/2621 useless extension candidates. Maximal degree in co-relation 11727. Up to 2175 conditions per place. [2024-06-21 21:31:16,998 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 84 selfloop transitions, 84 changer transitions 0/172 dead transitions. [2024-06-21 21:31:16,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 172 transitions, 1658 flow [2024-06-21 21:31:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:31:17,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:31:17,000 INFO L175 Difference]: Start difference. First operand has 80 places, 105 transitions, 846 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:31:17,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 172 transitions, 1658 flow [2024-06-21 21:31:17,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 172 transitions, 1588 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:17,016 INFO L231 Difference]: Finished difference. Result has 89 places, 131 transitions, 1299 flow [2024-06-21 21:31:17,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=89, PETRI_TRANSITIONS=131} [2024-06-21 21:31:17,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 21:31:17,017 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 131 transitions, 1299 flow [2024-06-21 21:31:17,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:17,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:17,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:17,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:31:17,018 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 21:31:17,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 587016808, now seen corresponding path program 1 times [2024-06-21 21:31:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908436286] [2024-06-21 21:31:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:17,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:18,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908436286] [2024-06-21 21:31:18,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908436286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:18,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:18,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99206501] [2024-06-21 21:31:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:18,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:18,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:18,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:18,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 131 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:18,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:18,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:18,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:20,593 INFO L124 PetriNetUnfolderBase]: 2043/3113 cut-off events. [2024-06-21 21:31:20,593 INFO L125 PetriNetUnfolderBase]: For 23271/23277 co-relation queries the response was YES. [2024-06-21 21:31:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14614 conditions, 3113 events. 2043/3113 cut-off events. For 23271/23277 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15517 event pairs, 763 based on Foata normal form. 16/3129 useless extension candidates. Maximal degree in co-relation 14575. Up to 2594 conditions per place. [2024-06-21 21:31:20,613 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 153 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2024-06-21 21:31:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 215 transitions, 2190 flow [2024-06-21 21:31:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:31:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:31:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 21:31:20,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-21 21:31:20,615 INFO L175 Difference]: Start difference. First operand has 89 places, 131 transitions, 1299 flow. Second operand 11 states and 205 transitions. [2024-06-21 21:31:20,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 215 transitions, 2190 flow [2024-06-21 21:31:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 215 transitions, 2089 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:20,641 INFO L231 Difference]: Finished difference. Result has 101 places, 155 transitions, 1545 flow [2024-06-21 21:31:20,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1545, PETRI_PLACES=101, PETRI_TRANSITIONS=155} [2024-06-21 21:31:20,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 21:31:20,644 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 155 transitions, 1545 flow [2024-06-21 21:31:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:20,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:20,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:20,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:31:20,644 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 21:31:20,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash 553555202, now seen corresponding path program 2 times [2024-06-21 21:31:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:20,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521631115] [2024-06-21 21:31:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:20,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521631115] [2024-06-21 21:31:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521631115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:23,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359945710] [2024-06-21 21:31:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:23,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:23,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 155 transitions, 1545 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:23,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:23,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:23,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:24,586 INFO L124 PetriNetUnfolderBase]: 2259/3415 cut-off events. [2024-06-21 21:31:24,587 INFO L125 PetriNetUnfolderBase]: For 31054/31060 co-relation queries the response was YES. [2024-06-21 21:31:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17535 conditions, 3415 events. 2259/3415 cut-off events. For 31054/31060 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16997 event pairs, 773 based on Foata normal form. 24/3439 useless extension candidates. Maximal degree in co-relation 17491. Up to 2758 conditions per place. [2024-06-21 21:31:24,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 72 changer transitions 0/218 dead transitions. [2024-06-21 21:31:24,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 218 transitions, 2387 flow [2024-06-21 21:31:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:31:24,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:31:24,609 INFO L175 Difference]: Start difference. First operand has 101 places, 155 transitions, 1545 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:31:24,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 218 transitions, 2387 flow [2024-06-21 21:31:24,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 218 transitions, 2297 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:24,642 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 1811 flow [2024-06-21 21:31:24,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2024-06-21 21:31:24,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 21:31:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 1811 flow [2024-06-21 21:31:24,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:24,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:24,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:31:24,643 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 21:31:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash 880345228, now seen corresponding path program 5 times [2024-06-21 21:31:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623354750] [2024-06-21 21:31:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:27,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:27,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623354750] [2024-06-21 21:31:27,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623354750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:27,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:27,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706766708] [2024-06-21 21:31:27,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:27,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:27,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:27,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:27,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:27,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:27,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:28,472 INFO L124 PetriNetUnfolderBase]: 2245/3370 cut-off events. [2024-06-21 21:31:28,472 INFO L125 PetriNetUnfolderBase]: For 34559/34563 co-relation queries the response was YES. [2024-06-21 21:31:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18588 conditions, 3370 events. 2245/3370 cut-off events. For 34559/34563 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16328 event pairs, 616 based on Foata normal form. 6/3376 useless extension candidates. Maximal degree in co-relation 18541. Up to 2931 conditions per place. [2024-06-21 21:31:28,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 113 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-06-21 21:31:28,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2332 flow [2024-06-21 21:31:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:31:28,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:31:28,496 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 1811 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:31:28,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2332 flow [2024-06-21 21:31:28,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 2161 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:28,532 INFO L231 Difference]: Finished difference. Result has 110 places, 172 transitions, 1816 flow [2024-06-21 21:31:28,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1816, PETRI_PLACES=110, PETRI_TRANSITIONS=172} [2024-06-21 21:31:28,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 21:31:28,533 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 172 transitions, 1816 flow [2024-06-21 21:31:28,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:28,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:28,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:31:28,533 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 21:31:28,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash 409586854, now seen corresponding path program 3 times [2024-06-21 21:31:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:28,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494140154] [2024-06-21 21:31:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:28,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:30,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:30,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494140154] [2024-06-21 21:31:30,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494140154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:30,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:30,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147195405] [2024-06-21 21:31:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:30,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 172 transitions, 1816 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:32,129 INFO L124 PetriNetUnfolderBase]: 2235/3367 cut-off events. [2024-06-21 21:31:32,129 INFO L125 PetriNetUnfolderBase]: For 36692/36698 co-relation queries the response was YES. [2024-06-21 21:31:32,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18193 conditions, 3367 events. 2235/3367 cut-off events. For 36692/36698 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16464 event pairs, 778 based on Foata normal form. 10/3377 useless extension candidates. Maximal degree in co-relation 18146. Up to 3039 conditions per place. [2024-06-21 21:31:32,148 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 46 changer transitions 0/231 dead transitions. [2024-06-21 21:31:32,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 231 transitions, 2772 flow [2024-06-21 21:31:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:31:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:31:32,151 INFO L175 Difference]: Start difference. First operand has 110 places, 172 transitions, 1816 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:31:32,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 231 transitions, 2772 flow [2024-06-21 21:31:32,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 231 transitions, 2580 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:32,185 INFO L231 Difference]: Finished difference. Result has 115 places, 204 transitions, 2195 flow [2024-06-21 21:31:32,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2195, PETRI_PLACES=115, PETRI_TRANSITIONS=204} [2024-06-21 21:31:32,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 21:31:32,185 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 204 transitions, 2195 flow [2024-06-21 21:31:32,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:32,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:32,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:32,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:31:32,186 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash -447740888, now seen corresponding path program 4 times [2024-06-21 21:31:32,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688402619] [2024-06-21 21:31:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:34,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:34,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688402619] [2024-06-21 21:31:34,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688402619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:34,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049596447] [2024-06-21 21:31:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:34,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:34,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 204 transitions, 2195 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:34,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:34,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:35,848 INFO L124 PetriNetUnfolderBase]: 2263/3409 cut-off events. [2024-06-21 21:31:35,849 INFO L125 PetriNetUnfolderBase]: For 40929/40945 co-relation queries the response was YES. [2024-06-21 21:31:35,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3409 events. 2263/3409 cut-off events. For 40929/40945 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16690 event pairs, 799 based on Foata normal form. 34/3443 useless extension candidates. Maximal degree in co-relation 18985. Up to 3035 conditions per place. [2024-06-21 21:31:35,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 73 changer transitions 0/246 dead transitions. [2024-06-21 21:31:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 246 transitions, 2950 flow [2024-06-21 21:31:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:31:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:31:35,875 INFO L175 Difference]: Start difference. First operand has 115 places, 204 transitions, 2195 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:31:35,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 246 transitions, 2950 flow [2024-06-21 21:31:35,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 246 transitions, 2904 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:35,925 INFO L231 Difference]: Finished difference. Result has 123 places, 216 transitions, 2479 flow [2024-06-21 21:31:35,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2479, PETRI_PLACES=123, PETRI_TRANSITIONS=216} [2024-06-21 21:31:35,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 21:31:35,926 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 216 transitions, 2479 flow [2024-06-21 21:31:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:31:35,927 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 21:31:35,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 409595782, now seen corresponding path program 1 times [2024-06-21 21:31:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:35,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369227357] [2024-06-21 21:31:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:38,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369227357] [2024-06-21 21:31:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369227357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:38,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851235233] [2024-06-21 21:31:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:38,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:38,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:38,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 216 transitions, 2479 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:38,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:38,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:38,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:39,779 INFO L124 PetriNetUnfolderBase]: 2255/3390 cut-off events. [2024-06-21 21:31:39,779 INFO L125 PetriNetUnfolderBase]: For 44316/44316 co-relation queries the response was YES. [2024-06-21 21:31:39,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19627 conditions, 3390 events. 2255/3390 cut-off events. For 44316/44316 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16534 event pairs, 898 based on Foata normal form. 4/3394 useless extension candidates. Maximal degree in co-relation 19572. Up to 3257 conditions per place. [2024-06-21 21:31:39,801 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 14 changer transitions 0/243 dead transitions. [2024-06-21 21:31:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 243 transitions, 3061 flow [2024-06-21 21:31:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:31:39,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:31:39,804 INFO L175 Difference]: Start difference. First operand has 123 places, 216 transitions, 2479 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:31:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 243 transitions, 3061 flow [2024-06-21 21:31:39,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 2945 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:39,853 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2422 flow [2024-06-21 21:31:39,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2024-06-21 21:31:39,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 21:31:39,854 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2422 flow [2024-06-21 21:31:39,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:39,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:39,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:31:39,855 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 21:31:39,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash -573972151, now seen corresponding path program 1 times [2024-06-21 21:31:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:39,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866159087] [2024-06-21 21:31:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:39,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:41,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866159087] [2024-06-21 21:31:41,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866159087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:41,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:41,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068896441] [2024-06-21 21:31:41,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:41,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:41,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2422 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:41,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:41,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:41,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:43,778 INFO L124 PetriNetUnfolderBase]: 2575/3860 cut-off events. [2024-06-21 21:31:43,778 INFO L125 PetriNetUnfolderBase]: For 51864/51874 co-relation queries the response was YES. [2024-06-21 21:31:43,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22417 conditions, 3860 events. 2575/3860 cut-off events. For 51864/51874 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19230 event pairs, 793 based on Foata normal form. 20/3880 useless extension candidates. Maximal degree in co-relation 22360. Up to 3277 conditions per place. [2024-06-21 21:31:43,808 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 244 selfloop transitions, 88 changer transitions 0/336 dead transitions. [2024-06-21 21:31:43,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 336 transitions, 4051 flow [2024-06-21 21:31:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:31:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:31:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 246 transitions. [2024-06-21 21:31:43,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:31:43,810 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2422 flow. Second operand 14 states and 246 transitions. [2024-06-21 21:31:43,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 336 transitions, 4051 flow [2024-06-21 21:31:43,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 336 transitions, 4008 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:43,878 INFO L231 Difference]: Finished difference. Result has 139 places, 260 transitions, 3088 flow [2024-06-21 21:31:43,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3088, PETRI_PLACES=139, PETRI_TRANSITIONS=260} [2024-06-21 21:31:43,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 21:31:43,879 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 260 transitions, 3088 flow [2024-06-21 21:31:43,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:43,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:43,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:43,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:31:43,880 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 21:31:43,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1188780213, now seen corresponding path program 2 times [2024-06-21 21:31:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163412110] [2024-06-21 21:31:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:46,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:46,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163412110] [2024-06-21 21:31:46,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163412110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:46,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:46,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:46,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338034546] [2024-06-21 21:31:46,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:46,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:46,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:46,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:46,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 260 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:46,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:46,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:46,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:48,093 INFO L124 PetriNetUnfolderBase]: 2841/4229 cut-off events. [2024-06-21 21:31:48,093 INFO L125 PetriNetUnfolderBase]: For 65571/65579 co-relation queries the response was YES. [2024-06-21 21:31:48,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26582 conditions, 4229 events. 2841/4229 cut-off events. For 65571/65579 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21230 event pairs, 641 based on Foata normal form. 20/4249 useless extension candidates. Maximal degree in co-relation 26520. Up to 3714 conditions per place. [2024-06-21 21:31:48,121 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 248 selfloop transitions, 90 changer transitions 0/342 dead transitions. [2024-06-21 21:31:48,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 342 transitions, 4492 flow [2024-06-21 21:31:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 21:31:48,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:31:48,123 INFO L175 Difference]: Start difference. First operand has 139 places, 260 transitions, 3088 flow. Second operand 12 states and 210 transitions. [2024-06-21 21:31:48,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 342 transitions, 4492 flow [2024-06-21 21:31:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 342 transitions, 4079 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:48,223 INFO L231 Difference]: Finished difference. Result has 146 places, 287 transitions, 3347 flow [2024-06-21 21:31:48,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3347, PETRI_PLACES=146, PETRI_TRANSITIONS=287} [2024-06-21 21:31:48,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 21:31:48,223 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 287 transitions, 3347 flow [2024-06-21 21:31:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:48,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:48,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:31:48,224 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 21:31:48,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1460944011, now seen corresponding path program 3 times [2024-06-21 21:31:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387219510] [2024-06-21 21:31:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:50,371 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 21:31:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387219510] [2024-06-21 21:31:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387219510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451136516] [2024-06-21 21:31:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:50,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:50,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 287 transitions, 3347 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:50,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:50,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:52,731 INFO L124 PetriNetUnfolderBase]: 3225/4801 cut-off events. [2024-06-21 21:31:52,731 INFO L125 PetriNetUnfolderBase]: For 80948/80950 co-relation queries the response was YES. [2024-06-21 21:31:52,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30499 conditions, 4801 events. 3225/4801 cut-off events. For 80948/80950 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24619 event pairs, 657 based on Foata normal form. 12/4813 useless extension candidates. Maximal degree in co-relation 30435. Up to 2855 conditions per place. [2024-06-21 21:31:52,771 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 170 selfloop transitions, 216 changer transitions 0/390 dead transitions. [2024-06-21 21:31:52,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 390 transitions, 5118 flow [2024-06-21 21:31:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-21 21:31:52,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2024-06-21 21:31:52,774 INFO L175 Difference]: Start difference. First operand has 146 places, 287 transitions, 3347 flow. Second operand 12 states and 233 transitions. [2024-06-21 21:31:52,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 390 transitions, 5118 flow [2024-06-21 21:31:52,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 390 transitions, 4992 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:52,888 INFO L231 Difference]: Finished difference. Result has 157 places, 313 transitions, 4211 flow [2024-06-21 21:31:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4211, PETRI_PLACES=157, PETRI_TRANSITIONS=313} [2024-06-21 21:31:52,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:31:52,889 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 313 transitions, 4211 flow [2024-06-21 21:31:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:52,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:52,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:31:52,890 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 21:31:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1192499283, now seen corresponding path program 4 times [2024-06-21 21:31:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706988346] [2024-06-21 21:31:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:55,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706988346] [2024-06-21 21:31:55,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706988346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:55,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219905462] [2024-06-21 21:31:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:55,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:55,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:55,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:55,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 313 transitions, 4211 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:55,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:55,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:55,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:57,534 INFO L124 PetriNetUnfolderBase]: 3301/4907 cut-off events. [2024-06-21 21:31:57,535 INFO L125 PetriNetUnfolderBase]: For 97850/97852 co-relation queries the response was YES. [2024-06-21 21:31:57,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34483 conditions, 4907 events. 3301/4907 cut-off events. For 97850/97852 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25147 event pairs, 724 based on Foata normal form. 12/4919 useless extension candidates. Maximal degree in co-relation 34413. Up to 2910 conditions per place. [2024-06-21 21:31:57,579 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 184 selfloop transitions, 218 changer transitions 0/406 dead transitions. [2024-06-21 21:31:57,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 406 transitions, 5874 flow [2024-06-21 21:31:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:31:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:31:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 254 transitions. [2024-06-21 21:31:57,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652014652014652 [2024-06-21 21:31:57,580 INFO L175 Difference]: Start difference. First operand has 157 places, 313 transitions, 4211 flow. Second operand 13 states and 254 transitions. [2024-06-21 21:31:57,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 406 transitions, 5874 flow [2024-06-21 21:31:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 406 transitions, 5628 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:57,749 INFO L231 Difference]: Finished difference. Result has 166 places, 321 transitions, 4569 flow [2024-06-21 21:31:57,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4569, PETRI_PLACES=166, PETRI_TRANSITIONS=321} [2024-06-21 21:31:57,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:31:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 321 transitions, 4569 flow [2024-06-21 21:31:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:31:57,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:57,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:31:57,750 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 21:31:57,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2100069249, now seen corresponding path program 5 times [2024-06-21 21:31:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893407653] [2024-06-21 21:31:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:00,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893407653] [2024-06-21 21:32:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893407653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:00,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:00,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:00,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744212419] [2024-06-21 21:32:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:00,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:00,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:00,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 321 transitions, 4569 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:00,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:00,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:00,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:02,441 INFO L124 PetriNetUnfolderBase]: 3307/4934 cut-off events. [2024-06-21 21:32:02,442 INFO L125 PetriNetUnfolderBase]: For 104696/104704 co-relation queries the response was YES. [2024-06-21 21:32:02,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4934 events. 3307/4934 cut-off events. For 104696/104704 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25552 event pairs, 910 based on Foata normal form. 20/4954 useless extension candidates. Maximal degree in co-relation 35604. Up to 4127 conditions per place. [2024-06-21 21:32:02,487 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 121 changer transitions 0/377 dead transitions. [2024-06-21 21:32:02,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 377 transitions, 5796 flow [2024-06-21 21:32:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:32:02,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:32:02,489 INFO L175 Difference]: Start difference. First operand has 166 places, 321 transitions, 4569 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:32:02,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 377 transitions, 5796 flow [2024-06-21 21:32:02,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 377 transitions, 5340 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-21 21:32:02,666 INFO L231 Difference]: Finished difference. Result has 168 places, 328 transitions, 4596 flow [2024-06-21 21:32:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4596, PETRI_PLACES=168, PETRI_TRANSITIONS=328} [2024-06-21 21:32:02,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:32:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 328 transitions, 4596 flow [2024-06-21 21:32:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:02,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:32:02,667 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 21:32:02,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash -19655855, now seen corresponding path program 6 times [2024-06-21 21:32:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370039301] [2024-06-21 21:32:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:05,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:05,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370039301] [2024-06-21 21:32:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370039301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:05,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422436229] [2024-06-21 21:32:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:05,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:05,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 328 transitions, 4596 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:05,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:05,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:05,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:07,532 INFO L124 PetriNetUnfolderBase]: 3679/5491 cut-off events. [2024-06-21 21:32:07,532 INFO L125 PetriNetUnfolderBase]: For 125215/125217 co-relation queries the response was YES. [2024-06-21 21:32:07,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39960 conditions, 5491 events. 3679/5491 cut-off events. For 125215/125217 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28869 event pairs, 647 based on Foata normal form. 20/5511 useless extension candidates. Maximal degree in co-relation 39885. Up to 3199 conditions per place. [2024-06-21 21:32:07,583 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 152 selfloop transitions, 257 changer transitions 0/413 dead transitions. [2024-06-21 21:32:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 413 transitions, 6388 flow [2024-06-21 21:32:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 21:32:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:32:07,585 INFO L175 Difference]: Start difference. First operand has 168 places, 328 transitions, 4596 flow. Second operand 10 states and 192 transitions. [2024-06-21 21:32:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 413 transitions, 6388 flow [2024-06-21 21:32:07,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 413 transitions, 6172 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:07,896 INFO L231 Difference]: Finished difference. Result has 173 places, 353 transitions, 5490 flow [2024-06-21 21:32:07,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5490, PETRI_PLACES=173, PETRI_TRANSITIONS=353} [2024-06-21 21:32:07,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 21:32:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 353 transitions, 5490 flow [2024-06-21 21:32:07,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:07,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:07,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:07,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:32:07,898 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 21:32:07,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash 236588553, now seen corresponding path program 7 times [2024-06-21 21:32:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:07,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131071961] [2024-06-21 21:32:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:10,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:10,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131071961] [2024-06-21 21:32:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131071961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:10,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969964929] [2024-06-21 21:32:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:10,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:11,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:11,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 353 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:11,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:11,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:11,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:13,074 INFO L124 PetriNetUnfolderBase]: 3835/5709 cut-off events. [2024-06-21 21:32:13,074 INFO L125 PetriNetUnfolderBase]: For 147936/147938 co-relation queries the response was YES. [2024-06-21 21:32:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44544 conditions, 5709 events. 3835/5709 cut-off events. For 147936/147938 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30081 event pairs, 800 based on Foata normal form. 20/5729 useless extension candidates. Maximal degree in co-relation 44466. Up to 3312 conditions per place. [2024-06-21 21:32:13,126 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 264 changer transitions 0/435 dead transitions. [2024-06-21 21:32:13,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 435 transitions, 7202 flow [2024-06-21 21:32:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:32:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:32:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 21:32:13,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 21:32:13,127 INFO L175 Difference]: Start difference. First operand has 173 places, 353 transitions, 5490 flow. Second operand 11 states and 213 transitions. [2024-06-21 21:32:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 435 transitions, 7202 flow [2024-06-21 21:32:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 435 transitions, 6767 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:13,450 INFO L231 Difference]: Finished difference. Result has 180 places, 367 transitions, 5915 flow [2024-06-21 21:32:13,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5915, PETRI_PLACES=180, PETRI_TRANSITIONS=367} [2024-06-21 21:32:13,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 21:32:13,450 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 367 transitions, 5915 flow [2024-06-21 21:32:13,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:13,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:13,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:32:13,451 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 21:32:13,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1520906125, now seen corresponding path program 8 times [2024-06-21 21:32:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70653265] [2024-06-21 21:32:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:16,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:16,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70653265] [2024-06-21 21:32:16,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70653265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:16,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:16,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594974855] [2024-06-21 21:32:16,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:16,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:16,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:16,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 367 transitions, 5915 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:16,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:16,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:16,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:18,174 INFO L124 PetriNetUnfolderBase]: 4019/6000 cut-off events. [2024-06-21 21:32:18,174 INFO L125 PetriNetUnfolderBase]: For 162727/162731 co-relation queries the response was YES. [2024-06-21 21:32:18,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46704 conditions, 6000 events. 4019/6000 cut-off events. For 162727/162731 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32013 event pairs, 832 based on Foata normal form. 19/6018 useless extension candidates. Maximal degree in co-relation 46624. Up to 4894 conditions per place. [2024-06-21 21:32:18,227 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 146 changer transitions 0/428 dead transitions. [2024-06-21 21:32:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 428 transitions, 7467 flow [2024-06-21 21:32:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:32:18,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:32:18,228 INFO L175 Difference]: Start difference. First operand has 180 places, 367 transitions, 5915 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:32:18,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 428 transitions, 7467 flow [2024-06-21 21:32:18,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 428 transitions, 6961 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:18,563 INFO L231 Difference]: Finished difference. Result has 183 places, 384 transitions, 6077 flow [2024-06-21 21:32:18,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6077, PETRI_PLACES=183, PETRI_TRANSITIONS=384} [2024-06-21 21:32:18,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 21:32:18,564 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 384 transitions, 6077 flow [2024-06-21 21:32:18,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:18,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:18,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:18,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:32:18,564 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 21:32:18,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1237777065, now seen corresponding path program 9 times [2024-06-21 21:32:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:18,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554709399] [2024-06-21 21:32:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:21,102 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 21:32:21,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554709399] [2024-06-21 21:32:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554709399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:21,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:21,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285909376] [2024-06-21 21:32:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:21,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:21,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 384 transitions, 6077 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:23,260 INFO L124 PetriNetUnfolderBase]: 4009/5985 cut-off events. [2024-06-21 21:32:23,260 INFO L125 PetriNetUnfolderBase]: For 162475/162479 co-relation queries the response was YES. [2024-06-21 21:32:23,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45629 conditions, 5985 events. 4009/5985 cut-off events. For 162475/162479 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31667 event pairs, 893 based on Foata normal form. 5/5990 useless extension candidates. Maximal degree in co-relation 45547. Up to 5003 conditions per place. [2024-06-21 21:32:23,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 133 changer transitions 0/486 dead transitions. [2024-06-21 21:32:23,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 486 transitions, 8426 flow [2024-06-21 21:32:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:32:23,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:32:23,316 INFO L175 Difference]: Start difference. First operand has 183 places, 384 transitions, 6077 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:32:23,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 486 transitions, 8426 flow [2024-06-21 21:32:23,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 486 transitions, 7967 flow, removed 109 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:23,633 INFO L231 Difference]: Finished difference. Result has 189 places, 452 transitions, 7319 flow [2024-06-21 21:32:23,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7319, PETRI_PLACES=189, PETRI_TRANSITIONS=452} [2024-06-21 21:32:23,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 21:32:23,634 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 452 transitions, 7319 flow [2024-06-21 21:32:23,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:23,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:23,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:23,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:32:23,634 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 21:32:23,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -995069153, now seen corresponding path program 10 times [2024-06-21 21:32:23,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:23,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882417191] [2024-06-21 21:32:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882417191] [2024-06-21 21:32:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882417191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:26,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:26,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582168387] [2024-06-21 21:32:26,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:26,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:26,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:26,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 452 transitions, 7319 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:28,305 INFO L124 PetriNetUnfolderBase]: 3973/5941 cut-off events. [2024-06-21 21:32:28,305 INFO L125 PetriNetUnfolderBase]: For 165451/165455 co-relation queries the response was YES. [2024-06-21 21:32:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46062 conditions, 5941 events. 3973/5941 cut-off events. For 165451/165455 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31589 event pairs, 885 based on Foata normal form. 19/5960 useless extension candidates. Maximal degree in co-relation 45975. Up to 4861 conditions per place. [2024-06-21 21:32:28,352 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 304 selfloop transitions, 193 changer transitions 0/501 dead transitions. [2024-06-21 21:32:28,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 501 transitions, 8639 flow [2024-06-21 21:32:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:32:28,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 21:32:28,354 INFO L175 Difference]: Start difference. First operand has 189 places, 452 transitions, 7319 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:32:28,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 501 transitions, 8639 flow [2024-06-21 21:32:28,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 501 transitions, 8465 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-21 21:32:28,653 INFO L231 Difference]: Finished difference. Result has 197 places, 452 transitions, 7565 flow [2024-06-21 21:32:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7565, PETRI_PLACES=197, PETRI_TRANSITIONS=452} [2024-06-21 21:32:28,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 21:32:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 452 transitions, 7565 flow [2024-06-21 21:32:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:28,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:28,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:32:28,655 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1026274387, now seen corresponding path program 1 times [2024-06-21 21:32:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4195288] [2024-06-21 21:32:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:30,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4195288] [2024-06-21 21:32:30,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4195288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:30,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:30,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382659268] [2024-06-21 21:32:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:30,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:30,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:30,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 452 transitions, 7565 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:30,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:30,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:33,367 INFO L124 PetriNetUnfolderBase]: 4904/7460 cut-off events. [2024-06-21 21:32:33,367 INFO L125 PetriNetUnfolderBase]: For 250527/250535 co-relation queries the response was YES. [2024-06-21 21:32:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57073 conditions, 7460 events. 4904/7460 cut-off events. For 250527/250535 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42739 event pairs, 1360 based on Foata normal form. 92/7552 useless extension candidates. Maximal degree in co-relation 56983. Up to 4879 conditions per place. [2024-06-21 21:32:33,438 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 402 selfloop transitions, 142 changer transitions 1/549 dead transitions. [2024-06-21 21:32:33,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 549 transitions, 9619 flow [2024-06-21 21:32:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:32:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:32:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 261 transitions. [2024-06-21 21:32:33,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-06-21 21:32:33,440 INFO L175 Difference]: Start difference. First operand has 197 places, 452 transitions, 7565 flow. Second operand 14 states and 261 transitions. [2024-06-21 21:32:33,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 549 transitions, 9619 flow [2024-06-21 21:32:33,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 549 transitions, 9165 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 21:32:33,901 INFO L231 Difference]: Finished difference. Result has 204 places, 456 transitions, 7536 flow [2024-06-21 21:32:33,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7536, PETRI_PLACES=204, PETRI_TRANSITIONS=456} [2024-06-21 21:32:33,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 21:32:33,902 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 456 transitions, 7536 flow [2024-06-21 21:32:33,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:33,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:33,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:33,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:32:33,902 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 21:32:33,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1071753663, now seen corresponding path program 2 times [2024-06-21 21:32:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:33,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424055089] [2024-06-21 21:32:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:33,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:36,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424055089] [2024-06-21 21:32:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424055089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:36,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676579843] [2024-06-21 21:32:36,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:36,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:36,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:36,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 456 transitions, 7536 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:36,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:36,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:36,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:38,797 INFO L124 PetriNetUnfolderBase]: 4859/7411 cut-off events. [2024-06-21 21:32:38,797 INFO L125 PetriNetUnfolderBase]: For 251717/251725 co-relation queries the response was YES. [2024-06-21 21:32:38,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56863 conditions, 7411 events. 4859/7411 cut-off events. For 251717/251725 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42695 event pairs, 1820 based on Foata normal form. 28/7439 useless extension candidates. Maximal degree in co-relation 56771. Up to 6841 conditions per place. [2024-06-21 21:32:38,865 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 410 selfloop transitions, 111 changer transitions 0/525 dead transitions. [2024-06-21 21:32:38,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 525 transitions, 9091 flow [2024-06-21 21:32:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:32:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:32:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-21 21:32:38,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010989010989011 [2024-06-21 21:32:38,866 INFO L175 Difference]: Start difference. First operand has 204 places, 456 transitions, 7536 flow. Second operand 13 states and 219 transitions. [2024-06-21 21:32:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 525 transitions, 9091 flow [2024-06-21 21:32:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 525 transitions, 8907 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:39,337 INFO L231 Difference]: Finished difference. Result has 212 places, 468 transitions, 7924 flow [2024-06-21 21:32:39,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7924, PETRI_PLACES=212, PETRI_TRANSITIONS=468} [2024-06-21 21:32:39,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 21:32:39,338 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 468 transitions, 7924 flow [2024-06-21 21:32:39,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:39,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:39,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:39,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:32:39,338 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 21:32:39,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1786021981, now seen corresponding path program 3 times [2024-06-21 21:32:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:39,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172945403] [2024-06-21 21:32:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:39,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172945403] [2024-06-21 21:32:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172945403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466469084] [2024-06-21 21:32:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:41,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:41,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 468 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:43,611 INFO L124 PetriNetUnfolderBase]: 5025/7681 cut-off events. [2024-06-21 21:32:43,611 INFO L125 PetriNetUnfolderBase]: For 273154/273162 co-relation queries the response was YES. [2024-06-21 21:32:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60252 conditions, 7681 events. 5025/7681 cut-off events. For 273154/273162 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44442 event pairs, 1468 based on Foata normal form. 12/7693 useless extension candidates. Maximal degree in co-relation 60155. Up to 6848 conditions per place. [2024-06-21 21:32:43,685 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 422 selfloop transitions, 113 changer transitions 0/539 dead transitions. [2024-06-21 21:32:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 539 transitions, 9789 flow [2024-06-21 21:32:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:32:43,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:32:43,687 INFO L175 Difference]: Start difference. First operand has 212 places, 468 transitions, 7924 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:32:43,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 539 transitions, 9789 flow [2024-06-21 21:32:44,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 539 transitions, 9567 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:44,242 INFO L231 Difference]: Finished difference. Result has 217 places, 487 transitions, 8415 flow [2024-06-21 21:32:44,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8415, PETRI_PLACES=217, PETRI_TRANSITIONS=487} [2024-06-21 21:32:44,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:32:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 487 transitions, 8415 flow [2024-06-21 21:32:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:44,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:32:44,244 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 21:32:44,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1960138331, now seen corresponding path program 4 times [2024-06-21 21:32:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961496784] [2024-06-21 21:32:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961496784] [2024-06-21 21:32:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961496784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:47,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:47,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448783755] [2024-06-21 21:32:47,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:47,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:47,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 487 transitions, 8415 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:47,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:47,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:47,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:49,704 INFO L124 PetriNetUnfolderBase]: 5270/8060 cut-off events. [2024-06-21 21:32:49,704 INFO L125 PetriNetUnfolderBase]: For 303907/303915 co-relation queries the response was YES. [2024-06-21 21:32:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64908 conditions, 8060 events. 5270/8060 cut-off events. For 303907/303915 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47227 event pairs, 1548 based on Foata normal form. 16/8076 useless extension candidates. Maximal degree in co-relation 64808. Up to 7400 conditions per place. [2024-06-21 21:32:49,798 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 460 selfloop transitions, 94 changer transitions 0/558 dead transitions. [2024-06-21 21:32:49,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 558 transitions, 10361 flow [2024-06-21 21:32:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:32:49,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:32:49,800 INFO L175 Difference]: Start difference. First operand has 217 places, 487 transitions, 8415 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:32:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 558 transitions, 10361 flow [2024-06-21 21:32:50,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 558 transitions, 9854 flow, removed 196 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:50,696 INFO L231 Difference]: Finished difference. Result has 222 places, 507 transitions, 8696 flow [2024-06-21 21:32:50,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8126, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8696, PETRI_PLACES=222, PETRI_TRANSITIONS=507} [2024-06-21 21:32:50,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-21 21:32:50,697 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 507 transitions, 8696 flow [2024-06-21 21:32:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:50,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:50,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:32:50,697 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 21:32:50,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1805318247, now seen corresponding path program 5 times [2024-06-21 21:32:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:50,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815151019] [2024-06-21 21:32:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815151019] [2024-06-21 21:32:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815151019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:55,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849090958] [2024-06-21 21:32:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:55,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:55,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 507 transitions, 8696 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:55,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:55,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:57,674 INFO L124 PetriNetUnfolderBase]: 5247/8027 cut-off events. [2024-06-21 21:32:57,674 INFO L125 PetriNetUnfolderBase]: For 296005/296013 co-relation queries the response was YES. [2024-06-21 21:32:57,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63287 conditions, 8027 events. 5247/8027 cut-off events. For 296005/296013 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 46981 event pairs, 1587 based on Foata normal form. 18/8045 useless extension candidates. Maximal degree in co-relation 63185. Up to 7544 conditions per place. [2024-06-21 21:32:57,769 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 465 selfloop transitions, 82 changer transitions 0/551 dead transitions. [2024-06-21 21:32:57,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 551 transitions, 10007 flow [2024-06-21 21:32:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:32:57,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:32:57,770 INFO L175 Difference]: Start difference. First operand has 222 places, 507 transitions, 8696 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:32:57,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 551 transitions, 10007 flow [2024-06-21 21:32:58,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 551 transitions, 9709 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:58,641 INFO L231 Difference]: Finished difference. Result has 225 places, 510 transitions, 8652 flow [2024-06-21 21:32:58,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8652, PETRI_PLACES=225, PETRI_TRANSITIONS=510} [2024-06-21 21:32:58,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 21:32:58,642 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 510 transitions, 8652 flow [2024-06-21 21:32:58,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:58,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:58,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:32:58,643 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 21:32:58,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:58,643 INFO L85 PathProgramCache]: Analyzing trace with hash -830139975, now seen corresponding path program 6 times [2024-06-21 21:32:58,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:58,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123421934] [2024-06-21 21:32:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123421934] [2024-06-21 21:33:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123421934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:00,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134839011] [2024-06-21 21:33:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:00,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:00,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 510 transitions, 8652 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:00,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:00,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:00,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:03,304 INFO L124 PetriNetUnfolderBase]: 5275/8063 cut-off events. [2024-06-21 21:33:03,304 INFO L125 PetriNetUnfolderBase]: For 304403/304405 co-relation queries the response was YES. [2024-06-21 21:33:03,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63589 conditions, 8063 events. 5275/8063 cut-off events. For 304403/304405 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47266 event pairs, 1487 based on Foata normal form. 8/8071 useless extension candidates. Maximal degree in co-relation 63485. Up to 7395 conditions per place. [2024-06-21 21:33:03,398 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 399 selfloop transitions, 154 changer transitions 0/557 dead transitions. [2024-06-21 21:33:03,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 557 transitions, 10085 flow [2024-06-21 21:33:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:33:03,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:33:03,399 INFO L175 Difference]: Start difference. First operand has 225 places, 510 transitions, 8652 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:33:03,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 557 transitions, 10085 flow [2024-06-21 21:33:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 557 transitions, 9960 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:04,087 INFO L231 Difference]: Finished difference. Result has 228 places, 512 transitions, 8921 flow [2024-06-21 21:33:04,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8527, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8921, PETRI_PLACES=228, PETRI_TRANSITIONS=512} [2024-06-21 21:33:04,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 21:33:04,087 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 512 transitions, 8921 flow [2024-06-21 21:33:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:04,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:04,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:04,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:33:04,088 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 21:33:04,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash -829955277, now seen corresponding path program 1 times [2024-06-21 21:33:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:04,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406680490] [2024-06-21 21:33:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:04,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:07,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406680490] [2024-06-21 21:33:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406680490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:07,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:07,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891573900] [2024-06-21 21:33:07,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:07,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:07,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:07,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:07,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:07,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:07,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 512 transitions, 8921 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:07,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:07,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:07,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:10,217 INFO L124 PetriNetUnfolderBase]: 5381/8184 cut-off events. [2024-06-21 21:33:10,218 INFO L125 PetriNetUnfolderBase]: For 338347/338357 co-relation queries the response was YES. [2024-06-21 21:33:10,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65278 conditions, 8184 events. 5381/8184 cut-off events. For 338347/338357 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47919 event pairs, 1833 based on Foata normal form. 28/8212 useless extension candidates. Maximal degree in co-relation 65173. Up to 7442 conditions per place. [2024-06-21 21:33:10,314 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 499 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-21 21:33:10,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 605 transitions, 11042 flow [2024-06-21 21:33:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:33:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:33:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 223 transitions. [2024-06-21 21:33:10,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2024-06-21 21:33:10,315 INFO L175 Difference]: Start difference. First operand has 228 places, 512 transitions, 8921 flow. Second operand 12 states and 223 transitions. [2024-06-21 21:33:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 605 transitions, 11042 flow [2024-06-21 21:33:11,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 605 transitions, 10727 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:11,065 INFO L231 Difference]: Finished difference. Result has 236 places, 533 transitions, 9236 flow [2024-06-21 21:33:11,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9236, PETRI_PLACES=236, PETRI_TRANSITIONS=533} [2024-06-21 21:33:11,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 21:33:11,065 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 533 transitions, 9236 flow [2024-06-21 21:33:11,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:11,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:11,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:11,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:33:11,066 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:11,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 674777643, now seen corresponding path program 7 times [2024-06-21 21:33:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:11,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998181961] [2024-06-21 21:33:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:11,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998181961] [2024-06-21 21:33:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998181961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:13,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:13,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61191446] [2024-06-21 21:33:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:13,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:13,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:13,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 533 transitions, 9236 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:13,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:13,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:13,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:16,686 INFO L124 PetriNetUnfolderBase]: 5444/8318 cut-off events. [2024-06-21 21:33:16,686 INFO L125 PetriNetUnfolderBase]: For 351773/351781 co-relation queries the response was YES. [2024-06-21 21:33:16,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68287 conditions, 8318 events. 5444/8318 cut-off events. For 351773/351781 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 49002 event pairs, 1444 based on Foata normal form. 18/8336 useless extension candidates. Maximal degree in co-relation 68179. Up to 7124 conditions per place. [2024-06-21 21:33:16,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 453 selfloop transitions, 129 changer transitions 0/586 dead transitions. [2024-06-21 21:33:16,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 586 transitions, 10987 flow [2024-06-21 21:33:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:33:16,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:33:16,769 INFO L175 Difference]: Start difference. First operand has 236 places, 533 transitions, 9236 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:33:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 586 transitions, 10987 flow [2024-06-21 21:33:17,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 586 transitions, 10821 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:17,422 INFO L231 Difference]: Finished difference. Result has 240 places, 540 transitions, 9580 flow [2024-06-21 21:33:17,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9070, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9580, PETRI_PLACES=240, PETRI_TRANSITIONS=540} [2024-06-21 21:33:17,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 21:33:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 540 transitions, 9580 flow [2024-06-21 21:33:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:17,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:17,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:33:17,423 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 21:33:17,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -724798331, now seen corresponding path program 8 times [2024-06-21 21:33:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342680333] [2024-06-21 21:33:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:20,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:20,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342680333] [2024-06-21 21:33:20,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342680333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:20,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:20,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:20,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238985033] [2024-06-21 21:33:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:20,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:20,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:20,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 540 transitions, 9580 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:20,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:20,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:20,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:22,909 INFO L124 PetriNetUnfolderBase]: 5416/8278 cut-off events. [2024-06-21 21:33:22,909 INFO L125 PetriNetUnfolderBase]: For 363895/363903 co-relation queries the response was YES. [2024-06-21 21:33:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68288 conditions, 8278 events. 5416/8278 cut-off events. For 363895/363903 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 48832 event pairs, 1869 based on Foata normal form. 20/8298 useless extension candidates. Maximal degree in co-relation 68179. Up to 7606 conditions per place. [2024-06-21 21:33:22,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 109 changer transitions 0/578 dead transitions. [2024-06-21 21:33:23,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 578 transitions, 10924 flow [2024-06-21 21:33:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:33:23,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:33:23,001 INFO L175 Difference]: Start difference. First operand has 240 places, 540 transitions, 9580 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:33:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 578 transitions, 10924 flow [2024-06-21 21:33:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 578 transitions, 10480 flow, removed 159 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:24,013 INFO L231 Difference]: Finished difference. Result has 242 places, 540 transitions, 9411 flow [2024-06-21 21:33:24,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9160, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9411, PETRI_PLACES=242, PETRI_TRANSITIONS=540} [2024-06-21 21:33:24,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 21:33:24,013 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 540 transitions, 9411 flow [2024-06-21 21:33:24,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:24,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:24,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:24,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:33:24,014 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 21:33:24,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:24,014 INFO L85 PathProgramCache]: Analyzing trace with hash 792925773, now seen corresponding path program 9 times [2024-06-21 21:33:24,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:24,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143690223] [2024-06-21 21:33:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:24,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:26,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:26,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143690223] [2024-06-21 21:33:26,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143690223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:26,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:26,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:26,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875557730] [2024-06-21 21:33:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:26,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:26,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:26,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 540 transitions, 9411 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:26,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:26,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:26,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:29,565 INFO L124 PetriNetUnfolderBase]: 5444/8304 cut-off events. [2024-06-21 21:33:29,565 INFO L125 PetriNetUnfolderBase]: For 339613/339615 co-relation queries the response was YES. [2024-06-21 21:33:29,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67705 conditions, 8304 events. 5444/8304 cut-off events. For 339613/339615 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 48818 event pairs, 1508 based on Foata normal form. 8/8312 useless extension candidates. Maximal degree in co-relation 67595. Up to 7624 conditions per place. [2024-06-21 21:33:29,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 157 changer transitions 0/579 dead transitions. [2024-06-21 21:33:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 579 transitions, 10862 flow [2024-06-21 21:33:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:33:29,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:33:29,668 INFO L175 Difference]: Start difference. First operand has 242 places, 540 transitions, 9411 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:33:29,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 579 transitions, 10862 flow [2024-06-21 21:33:30,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 579 transitions, 10599 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:30,375 INFO L231 Difference]: Finished difference. Result has 243 places, 542 transitions, 9564 flow [2024-06-21 21:33:30,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9564, PETRI_PLACES=243, PETRI_TRANSITIONS=542} [2024-06-21 21:33:30,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 21:33:30,376 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 542 transitions, 9564 flow [2024-06-21 21:33:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:30,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:30,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:33:30,377 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 21:33:30,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1629388453, now seen corresponding path program 2 times [2024-06-21 21:33:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325481621] [2024-06-21 21:33:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325481621] [2024-06-21 21:33:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325481621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:33,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:33,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550876406] [2024-06-21 21:33:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:33,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:33,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 542 transitions, 9564 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:33,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:33,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:33,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:36,370 INFO L124 PetriNetUnfolderBase]: 5532/8422 cut-off events. [2024-06-21 21:33:36,370 INFO L125 PetriNetUnfolderBase]: For 376712/376722 co-relation queries the response was YES. [2024-06-21 21:33:36,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69014 conditions, 8422 events. 5532/8422 cut-off events. For 376712/376722 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 49669 event pairs, 1847 based on Foata normal form. 28/8450 useless extension candidates. Maximal degree in co-relation 68903. Up to 7433 conditions per place. [2024-06-21 21:33:36,630 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 130 changer transitions 0/603 dead transitions. [2024-06-21 21:33:36,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 603 transitions, 11278 flow [2024-06-21 21:33:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:33:36,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:33:36,631 INFO L175 Difference]: Start difference. First operand has 243 places, 542 transitions, 9564 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:33:36,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 603 transitions, 11278 flow [2024-06-21 21:33:37,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 603 transitions, 10904 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:37,288 INFO L231 Difference]: Finished difference. Result has 247 places, 545 transitions, 9572 flow [2024-06-21 21:33:37,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9196, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9572, PETRI_PLACES=247, PETRI_TRANSITIONS=545} [2024-06-21 21:33:37,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 21:33:37,289 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 545 transitions, 9572 flow [2024-06-21 21:33:37,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:37,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:37,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:33:37,290 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 21:33:37,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash -96726037, now seen corresponding path program 10 times [2024-06-21 21:33:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:37,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70469244] [2024-06-21 21:33:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:40,267 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 21:33:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70469244] [2024-06-21 21:33:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70469244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:40,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285446104] [2024-06-21 21:33:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:40,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:40,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 545 transitions, 9572 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:40,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:40,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:40,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:43,024 INFO L124 PetriNetUnfolderBase]: 5519/8412 cut-off events. [2024-06-21 21:33:43,025 INFO L125 PetriNetUnfolderBase]: For 351026/351030 co-relation queries the response was YES. [2024-06-21 21:33:43,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68799 conditions, 8412 events. 5519/8412 cut-off events. For 351026/351030 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 49374 event pairs, 1506 based on Foata normal form. 7/8418 useless extension candidates. Maximal degree in co-relation 68687. Up to 7783 conditions per place. [2024-06-21 21:33:43,125 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 150 changer transitions 0/579 dead transitions. [2024-06-21 21:33:43,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 579 transitions, 10991 flow [2024-06-21 21:33:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:33:43,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:33:43,126 INFO L175 Difference]: Start difference. First operand has 247 places, 545 transitions, 9572 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:33:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 579 transitions, 10991 flow [2024-06-21 21:33:43,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 579 transitions, 10707 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:43,908 INFO L231 Difference]: Finished difference. Result has 248 places, 547 transitions, 9686 flow [2024-06-21 21:33:43,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9288, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9686, PETRI_PLACES=248, PETRI_TRANSITIONS=547} [2024-06-21 21:33:43,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:33:43,909 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 547 transitions, 9686 flow [2024-06-21 21:33:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:33:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:43,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:33:43,909 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:43,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -289863717, now seen corresponding path program 3 times [2024-06-21 21:33:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425996831] [2024-06-21 21:33:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:47,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425996831] [2024-06-21 21:33:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425996831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:47,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:47,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051624710] [2024-06-21 21:33:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:47,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:47,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 547 transitions, 9686 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:47,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:47,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:47,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:50,316 INFO L124 PetriNetUnfolderBase]: 5607/8577 cut-off events. [2024-06-21 21:33:50,316 INFO L125 PetriNetUnfolderBase]: For 383502/383516 co-relation queries the response was YES. [2024-06-21 21:33:50,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69786 conditions, 8577 events. 5607/8577 cut-off events. For 383502/383516 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 51030 event pairs, 1925 based on Foata normal form. 32/8609 useless extension candidates. Maximal degree in co-relation 69673. Up to 7938 conditions per place. [2024-06-21 21:33:50,407 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 83 changer transitions 0/596 dead transitions. [2024-06-21 21:33:50,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 596 transitions, 11264 flow [2024-06-21 21:33:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:33:50,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:33:50,409 INFO L175 Difference]: Start difference. First operand has 248 places, 547 transitions, 9686 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:33:50,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 596 transitions, 11264 flow [2024-06-21 21:33:51,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 596 transitions, 10908 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:51,095 INFO L231 Difference]: Finished difference. Result has 251 places, 550 transitions, 9614 flow [2024-06-21 21:33:51,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9330, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9614, PETRI_PLACES=251, PETRI_TRANSITIONS=550} [2024-06-21 21:33:51,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 21:33:51,096 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 550 transitions, 9614 flow [2024-06-21 21:33:51,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:51,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:51,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:51,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:33:51,096 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:51,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:51,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1523951419, now seen corresponding path program 4 times [2024-06-21 21:33:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:51,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010889130] [2024-06-21 21:33:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:51,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010889130] [2024-06-21 21:33:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010889130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:54,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:54,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111757686] [2024-06-21 21:33:54,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:54,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:54,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:54,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:54,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 550 transitions, 9614 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:54,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:54,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:54,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:57,178 INFO L124 PetriNetUnfolderBase]: 5627/8630 cut-off events. [2024-06-21 21:33:57,178 INFO L125 PetriNetUnfolderBase]: For 387060/387074 co-relation queries the response was YES. [2024-06-21 21:33:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70398 conditions, 8630 events. 5627/8630 cut-off events. For 387060/387074 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 51453 event pairs, 1898 based on Foata normal form. 18/8648 useless extension candidates. Maximal degree in co-relation 70284. Up to 8122 conditions per place. [2024-06-21 21:33:57,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 58 changer transitions 0/584 dead transitions. [2024-06-21 21:33:57,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 584 transitions, 10964 flow [2024-06-21 21:33:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:33:57,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:33:57,286 INFO L175 Difference]: Start difference. First operand has 251 places, 550 transitions, 9614 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:33:57,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 584 transitions, 10964 flow [2024-06-21 21:33:58,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 584 transitions, 10728 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:58,225 INFO L231 Difference]: Finished difference. Result has 252 places, 552 transitions, 9553 flow [2024-06-21 21:33:58,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9553, PETRI_PLACES=252, PETRI_TRANSITIONS=552} [2024-06-21 21:33:58,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 21:33:58,226 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 552 transitions, 9553 flow [2024-06-21 21:33:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:58,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:58,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:33:58,227 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:58,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:58,227 INFO L85 PathProgramCache]: Analyzing trace with hash -545718619, now seen corresponding path program 5 times [2024-06-21 21:33:58,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:58,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937014329] [2024-06-21 21:33:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:01,327 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 21:34:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937014329] [2024-06-21 21:34:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937014329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:01,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:01,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74004243] [2024-06-21 21:34:01,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:01,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:01,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:01,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 552 transitions, 9553 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:01,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:01,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:01,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:04,110 INFO L124 PetriNetUnfolderBase]: 5619/8622 cut-off events. [2024-06-21 21:34:04,110 INFO L125 PetriNetUnfolderBase]: For 396727/396741 co-relation queries the response was YES. [2024-06-21 21:34:04,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 8622 events. 5619/8622 cut-off events. For 396727/396741 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 51375 event pairs, 1866 based on Foata normal form. 18/8640 useless extension candidates. Maximal degree in co-relation 70196. Up to 7978 conditions per place. [2024-06-21 21:34:04,202 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 67 changer transitions 0/589 dead transitions. [2024-06-21 21:34:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 589 transitions, 10943 flow [2024-06-21 21:34:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:34:04,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:34:04,203 INFO L175 Difference]: Start difference. First operand has 252 places, 552 transitions, 9553 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:34:04,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 589 transitions, 10943 flow [2024-06-21 21:34:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 589 transitions, 10790 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:04,944 INFO L231 Difference]: Finished difference. Result has 255 places, 557 transitions, 9650 flow [2024-06-21 21:34:04,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9650, PETRI_PLACES=255, PETRI_TRANSITIONS=557} [2024-06-21 21:34:04,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 21:34:04,945 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 557 transitions, 9650 flow [2024-06-21 21:34:04,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:04,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:04,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:34:04,946 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:04,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -594709845, now seen corresponding path program 1 times [2024-06-21 21:34:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:04,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398733063] [2024-06-21 21:34:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:04,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398733063] [2024-06-21 21:34:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398733063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:06,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:34:06,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650261151] [2024-06-21 21:34:06,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:06,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:34:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:34:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:34:06,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:34:06,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 557 transitions, 9650 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:06,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:06,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:34:06,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:09,238 INFO L124 PetriNetUnfolderBase]: 5257/8143 cut-off events. [2024-06-21 21:34:09,238 INFO L125 PetriNetUnfolderBase]: For 404104/404176 co-relation queries the response was YES. [2024-06-21 21:34:09,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67806 conditions, 8143 events. 5257/8143 cut-off events. For 404104/404176 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49353 event pairs, 2105 based on Foata normal form. 36/8121 useless extension candidates. Maximal degree in co-relation 67689. Up to 7619 conditions per place. [2024-06-21 21:34:09,341 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 503 selfloop transitions, 11 changer transitions 0/570 dead transitions. [2024-06-21 21:34:09,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 570 transitions, 10750 flow [2024-06-21 21:34:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:34:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:34:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-21 21:34:09,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 21:34:09,342 INFO L175 Difference]: Start difference. First operand has 255 places, 557 transitions, 9650 flow. Second operand 5 states and 86 transitions. [2024-06-21 21:34:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 570 transitions, 10750 flow [2024-06-21 21:34:10,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 570 transitions, 10595 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:10,275 INFO L231 Difference]: Finished difference. Result has 256 places, 560 transitions, 9563 flow [2024-06-21 21:34:10,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9495, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9563, PETRI_PLACES=256, PETRI_TRANSITIONS=560} [2024-06-21 21:34:10,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 21:34:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 560 transitions, 9563 flow [2024-06-21 21:34:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:10,276 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 21:34:10,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:34:10,276 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 21:34:10,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1831356056, now seen corresponding path program 1 times [2024-06-21 21:34:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:10,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006287538] [2024-06-21 21:34:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:10,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:12,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006287538] [2024-06-21 21:34:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006287538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:12,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:12,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:12,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711487966] [2024-06-21 21:34:12,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:12,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:12,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 560 transitions, 9563 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:12,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:12,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:12,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:16,007 INFO L124 PetriNetUnfolderBase]: 5855/8998 cut-off events. [2024-06-21 21:34:16,007 INFO L125 PetriNetUnfolderBase]: For 479321/479329 co-relation queries the response was YES. [2024-06-21 21:34:16,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72897 conditions, 8998 events. 5855/8998 cut-off events. For 479321/479329 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 54251 event pairs, 1891 based on Foata normal form. 82/9080 useless extension candidates. Maximal degree in co-relation 72779. Up to 7661 conditions per place. [2024-06-21 21:34:16,119 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 476 selfloop transitions, 152 changer transitions 8/640 dead transitions. [2024-06-21 21:34:16,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 640 transitions, 11568 flow [2024-06-21 21:34:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 21:34:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 21:34:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 265 transitions. [2024-06-21 21:34:16,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:34:16,121 INFO L175 Difference]: Start difference. First operand has 256 places, 560 transitions, 9563 flow. Second operand 15 states and 265 transitions. [2024-06-21 21:34:16,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 640 transitions, 11568 flow [2024-06-21 21:34:17,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 640 transitions, 11522 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:17,233 INFO L231 Difference]: Finished difference. Result has 268 places, 558 transitions, 9837 flow [2024-06-21 21:34:17,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9517, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9837, PETRI_PLACES=268, PETRI_TRANSITIONS=558} [2024-06-21 21:34:17,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 21:34:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 558 transitions, 9837 flow [2024-06-21 21:34:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:17,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:17,234 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 21:34:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:34:17,235 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 21:34:17,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1819481816, now seen corresponding path program 2 times [2024-06-21 21:34:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:17,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952183956] [2024-06-21 21:34:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952183956] [2024-06-21 21:34:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952183956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519679161] [2024-06-21 21:34:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:19,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:19,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 558 transitions, 9837 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:19,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:19,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:19,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:22,874 INFO L124 PetriNetUnfolderBase]: 5811/8942 cut-off events. [2024-06-21 21:34:22,875 INFO L125 PetriNetUnfolderBase]: For 483432/483440 co-relation queries the response was YES. [2024-06-21 21:34:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72843 conditions, 8942 events. 5811/8942 cut-off events. For 483432/483440 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 54000 event pairs, 1631 based on Foata normal form. 72/9014 useless extension candidates. Maximal degree in co-relation 72724. Up to 6945 conditions per place. [2024-06-21 21:34:22,978 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 483 selfloop transitions, 145 changer transitions 16/648 dead transitions. [2024-06-21 21:34:22,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 648 transitions, 12035 flow [2024-06-21 21:34:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 21:34:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 21:34:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 270 transitions. [2024-06-21 21:34:22,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:34:22,980 INFO L175 Difference]: Start difference. First operand has 268 places, 558 transitions, 9837 flow. Second operand 15 states and 270 transitions. [2024-06-21 21:34:22,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 648 transitions, 12035 flow [2024-06-21 21:34:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 648 transitions, 11771 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 21:34:23,891 INFO L231 Difference]: Finished difference. Result has 273 places, 550 transitions, 9741 flow [2024-06-21 21:34:23,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9573, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9741, PETRI_PLACES=273, PETRI_TRANSITIONS=550} [2024-06-21 21:34:23,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:34:23,892 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 550 transitions, 9741 flow [2024-06-21 21:34:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:23,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:23,892 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 21:34:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:34:23,893 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 21:34:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 467895690, now seen corresponding path program 3 times [2024-06-21 21:34:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147013617] [2024-06-21 21:34:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147013617] [2024-06-21 21:34:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147013617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306781878] [2024-06-21 21:34:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:25,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:25,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:25,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 550 transitions, 9741 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:25,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:29,314 INFO L124 PetriNetUnfolderBase]: 6529/10107 cut-off events. [2024-06-21 21:34:29,314 INFO L125 PetriNetUnfolderBase]: For 574377/574385 co-relation queries the response was YES. [2024-06-21 21:34:29,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84575 conditions, 10107 events. 6529/10107 cut-off events. For 574377/574385 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 63097 event pairs, 1678 based on Foata normal form. 24/10131 useless extension candidates. Maximal degree in co-relation 84455. Up to 5426 conditions per place. [2024-06-21 21:34:29,427 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 470 selfloop transitions, 169 changer transitions 0/643 dead transitions. [2024-06-21 21:34:29,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 643 transitions, 12246 flow [2024-06-21 21:34:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:34:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:34:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 239 transitions. [2024-06-21 21:34:29,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772893772893773 [2024-06-21 21:34:29,428 INFO L175 Difference]: Start difference. First operand has 273 places, 550 transitions, 9741 flow. Second operand 13 states and 239 transitions. [2024-06-21 21:34:29,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 643 transitions, 12246 flow [2024-06-21 21:34:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 643 transitions, 11872 flow, removed 43 selfloop flow, removed 13 redundant places. [2024-06-21 21:34:30,495 INFO L231 Difference]: Finished difference. Result has 273 places, 558 transitions, 10022 flow [2024-06-21 21:34:30,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9386, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10022, PETRI_PLACES=273, PETRI_TRANSITIONS=558} [2024-06-21 21:34:30,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:34:30,495 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 558 transitions, 10022 flow [2024-06-21 21:34:30,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:30,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:30,496 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 21:34:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:34:30,496 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 21:34:30,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash -132162506, now seen corresponding path program 4 times [2024-06-21 21:34:30,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:30,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951270056] [2024-06-21 21:34:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:30,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951270056] [2024-06-21 21:34:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951270056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:33,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:33,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:33,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489404923] [2024-06-21 21:34:33,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:33,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:33,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:33,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 558 transitions, 10022 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:33,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:33,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:33,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:37,649 INFO L124 PetriNetUnfolderBase]: 8673/13585 cut-off events. [2024-06-21 21:34:37,649 INFO L125 PetriNetUnfolderBase]: For 909212/909220 co-relation queries the response was YES. [2024-06-21 21:34:37,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113057 conditions, 13585 events. 8673/13585 cut-off events. For 909212/909220 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 91067 event pairs, 2514 based on Foata normal form. 80/13665 useless extension candidates. Maximal degree in co-relation 112935. Up to 9181 conditions per place. [2024-06-21 21:34:37,823 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 535 selfloop transitions, 129 changer transitions 0/668 dead transitions. [2024-06-21 21:34:37,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 668 transitions, 12947 flow [2024-06-21 21:34:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:34:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:34:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2024-06-21 21:34:37,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45068027210884354 [2024-06-21 21:34:37,825 INFO L175 Difference]: Start difference. First operand has 273 places, 558 transitions, 10022 flow. Second operand 14 states and 265 transitions. [2024-06-21 21:34:37,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 668 transitions, 12947 flow [2024-06-21 21:34:39,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 668 transitions, 12564 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:39,743 INFO L231 Difference]: Finished difference. Result has 280 places, 571 transitions, 10436 flow [2024-06-21 21:34:39,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10436, PETRI_PLACES=280, PETRI_TRANSITIONS=571} [2024-06-21 21:34:39,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 21:34:39,744 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 571 transitions, 10436 flow [2024-06-21 21:34:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:39,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:39,744 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 21:34:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:34:39,744 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 21:34:39,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -43448876, now seen corresponding path program 5 times [2024-06-21 21:34:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659066459] [2024-06-21 21:34:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:42,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:42,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659066459] [2024-06-21 21:34:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659066459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:42,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475231812] [2024-06-21 21:34:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:42,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:42,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:42,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 571 transitions, 10436 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:42,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:42,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:42,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:47,254 INFO L124 PetriNetUnfolderBase]: 9030/14187 cut-off events. [2024-06-21 21:34:47,255 INFO L125 PetriNetUnfolderBase]: For 959677/959685 co-relation queries the response was YES. [2024-06-21 21:34:47,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116337 conditions, 14187 events. 9030/14187 cut-off events. For 959677/959685 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 96275 event pairs, 3690 based on Foata normal form. 102/14289 useless extension candidates. Maximal degree in co-relation 116211. Up to 12724 conditions per place. [2024-06-21 21:34:47,445 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 524 selfloop transitions, 115 changer transitions 0/643 dead transitions. [2024-06-21 21:34:47,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 643 transitions, 12527 flow [2024-06-21 21:34:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:34:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:34:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-21 21:34:47,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 21:34:47,447 INFO L175 Difference]: Start difference. First operand has 280 places, 571 transitions, 10436 flow. Second operand 13 states and 232 transitions. [2024-06-21 21:34:47,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 643 transitions, 12527 flow [2024-06-21 21:34:50,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 643 transitions, 12243 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:50,357 INFO L231 Difference]: Finished difference. Result has 284 places, 576 transitions, 10591 flow [2024-06-21 21:34:50,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10158, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10591, PETRI_PLACES=284, PETRI_TRANSITIONS=576} [2024-06-21 21:34:50,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:34:50,358 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 576 transitions, 10591 flow [2024-06-21 21:34:50,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:50,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:50,359 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 21:34:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:34:50,359 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:50,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash -571617854, now seen corresponding path program 6 times [2024-06-21 21:34:50,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862983830] [2024-06-21 21:34:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862983830] [2024-06-21 21:34:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862983830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:52,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915056176] [2024-06-21 21:34:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:52,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:52,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 576 transitions, 10591 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:52,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:52,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:52,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:58,058 INFO L124 PetriNetUnfolderBase]: 9114/14355 cut-off events. [2024-06-21 21:34:58,058 INFO L125 PetriNetUnfolderBase]: For 918504/918512 co-relation queries the response was YES. [2024-06-21 21:34:58,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114210 conditions, 14355 events. 9114/14355 cut-off events. For 918504/918512 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 97944 event pairs, 3274 based on Foata normal form. 88/14443 useless extension candidates. Maximal degree in co-relation 114082. Up to 11150 conditions per place. [2024-06-21 21:34:58,250 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 534 selfloop transitions, 117 changer transitions 0/655 dead transitions. [2024-06-21 21:34:58,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 655 transitions, 12802 flow [2024-06-21 21:34:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:34:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:34:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-06-21 21:34:58,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-21 21:34:58,251 INFO L175 Difference]: Start difference. First operand has 284 places, 576 transitions, 10591 flow. Second operand 13 states and 237 transitions. [2024-06-21 21:34:58,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 655 transitions, 12802 flow [2024-06-21 21:35:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 655 transitions, 12548 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:35:00,369 INFO L231 Difference]: Finished difference. Result has 290 places, 579 transitions, 10735 flow [2024-06-21 21:35:00,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10337, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10735, PETRI_PLACES=290, PETRI_TRANSITIONS=579} [2024-06-21 21:35:00,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:35:00,370 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 579 transitions, 10735 flow [2024-06-21 21:35:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:00,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:00,370 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 21:35:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:35:00,370 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 21:35:00,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1287048630, now seen corresponding path program 7 times [2024-06-21 21:35:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110821247] [2024-06-21 21:35:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:03,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:03,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110821247] [2024-06-21 21:35:03,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110821247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:03,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:03,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356098754] [2024-06-21 21:35:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:03,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:03,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 579 transitions, 10735 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:03,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:03,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:03,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:08,613 INFO L124 PetriNetUnfolderBase]: 9426/14907 cut-off events. [2024-06-21 21:35:08,614 INFO L125 PetriNetUnfolderBase]: For 958364/958366 co-relation queries the response was YES. [2024-06-21 21:35:08,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117656 conditions, 14907 events. 9426/14907 cut-off events. For 958364/958366 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 103144 event pairs, 3545 based on Foata normal form. 76/14983 useless extension candidates. Maximal degree in co-relation 117526. Up to 11866 conditions per place. [2024-06-21 21:35:08,785 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 322 selfloop transitions, 345 changer transitions 0/671 dead transitions. [2024-06-21 21:35:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 671 transitions, 13130 flow [2024-06-21 21:35:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:35:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:35:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-06-21 21:35:08,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633699633699634 [2024-06-21 21:35:08,787 INFO L175 Difference]: Start difference. First operand has 290 places, 579 transitions, 10735 flow. Second operand 13 states and 253 transitions. [2024-06-21 21:35:08,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 671 transitions, 13130 flow [2024-06-21 21:35:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 671 transitions, 12852 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 21:35:11,207 INFO L231 Difference]: Finished difference. Result has 295 places, 581 transitions, 11266 flow [2024-06-21 21:35:11,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10457, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11266, PETRI_PLACES=295, PETRI_TRANSITIONS=581} [2024-06-21 21:35:11,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 21:35:11,208 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 581 transitions, 11266 flow [2024-06-21 21:35:11,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:11,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:11,208 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 21:35:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:35:11,208 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 21:35:11,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 35614674, now seen corresponding path program 8 times [2024-06-21 21:35:11,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:11,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145999308] [2024-06-21 21:35:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:11,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145999308] [2024-06-21 21:35:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145999308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:13,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:13,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439461211] [2024-06-21 21:35:13,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:13,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 581 transitions, 11266 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:13,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:19,851 INFO L124 PetriNetUnfolderBase]: 9738/15431 cut-off events. [2024-06-21 21:35:19,851 INFO L125 PetriNetUnfolderBase]: For 1008784/1008786 co-relation queries the response was YES. [2024-06-21 21:35:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122066 conditions, 15431 events. 9738/15431 cut-off events. For 1008784/1008786 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 107808 event pairs, 3720 based on Foata normal form. 76/15507 useless extension candidates. Maximal degree in co-relation 121935. Up to 12390 conditions per place. [2024-06-21 21:35:20,037 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 337 selfloop transitions, 341 changer transitions 0/682 dead transitions. [2024-06-21 21:35:20,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 682 transitions, 13745 flow [2024-06-21 21:35:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:35:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:35:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-06-21 21:35:20,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467687074829932 [2024-06-21 21:35:20,039 INFO L175 Difference]: Start difference. First operand has 295 places, 581 transitions, 11266 flow. Second operand 14 states and 275 transitions. [2024-06-21 21:35:20,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 682 transitions, 13745 flow [2024-06-21 21:35:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 682 transitions, 13047 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-21 21:35:22,330 INFO L231 Difference]: Finished difference. Result has 299 places, 583 transitions, 11373 flow [2024-06-21 21:35:22,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10568, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11373, PETRI_PLACES=299, PETRI_TRANSITIONS=583} [2024-06-21 21:35:22,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 21:35:22,331 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 583 transitions, 11373 flow [2024-06-21 21:35:22,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:22,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:22,331 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 21:35:22,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:35:22,332 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 21:35:22,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 35466804, now seen corresponding path program 9 times [2024-06-21 21:35:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:22,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058571524] [2024-06-21 21:35:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058571524] [2024-06-21 21:35:24,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058571524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:24,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:24,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867859880] [2024-06-21 21:35:24,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:24,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:24,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:24,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 583 transitions, 11373 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:24,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:24,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:24,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:31,021 INFO L124 PetriNetUnfolderBase]: 10299/16342 cut-off events. [2024-06-21 21:35:31,021 INFO L125 PetriNetUnfolderBase]: For 1103261/1103263 co-relation queries the response was YES. [2024-06-21 21:35:31,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129597 conditions, 16342 events. 10299/16342 cut-off events. For 1103261/1103263 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 115487 event pairs, 3746 based on Foata normal form. 66/16408 useless extension candidates. Maximal degree in co-relation 129465. Up to 11759 conditions per place. [2024-06-21 21:35:31,319 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 347 selfloop transitions, 344 changer transitions 0/695 dead transitions. [2024-06-21 21:35:31,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 695 transitions, 14146 flow [2024-06-21 21:35:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:35:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:35:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 280 transitions. [2024-06-21 21:35:31,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:35:31,321 INFO L175 Difference]: Start difference. First operand has 299 places, 583 transitions, 11373 flow. Second operand 14 states and 280 transitions. [2024-06-21 21:35:31,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 695 transitions, 14146 flow [2024-06-21 21:35:33,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 695 transitions, 13387 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-06-21 21:35:33,163 INFO L231 Difference]: Finished difference. Result has 302 places, 588 transitions, 11543 flow [2024-06-21 21:35:33,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10614, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11543, PETRI_PLACES=302, PETRI_TRANSITIONS=588} [2024-06-21 21:35:33,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 21:35:33,164 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 588 transitions, 11543 flow [2024-06-21 21:35:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:33,164 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 21:35:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:35:33,164 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 21:35:33,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash 41192256, now seen corresponding path program 1 times [2024-06-21 21:35:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:33,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789738198] [2024-06-21 21:35:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789738198] [2024-06-21 21:35:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789738198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:37,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:37,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:35:37,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249709552] [2024-06-21 21:35:37,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:35:37,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:35:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:35:37,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:37,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 588 transitions, 11543 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:37,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:37,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:37,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:43,441 INFO L124 PetriNetUnfolderBase]: 10847/17269 cut-off events. [2024-06-21 21:35:43,441 INFO L125 PetriNetUnfolderBase]: For 1215171/1215173 co-relation queries the response was YES. [2024-06-21 21:35:43,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138056 conditions, 17269 events. 10847/17269 cut-off events. For 1215171/1215173 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 123709 event pairs, 3820 based on Foata normal form. 56/17325 useless extension candidates. Maximal degree in co-relation 137922. Up to 12079 conditions per place. [2024-06-21 21:35:43,684 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 418 selfloop transitions, 321 changer transitions 0/743 dead transitions. [2024-06-21 21:35:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 743 transitions, 15248 flow [2024-06-21 21:35:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:35:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:35:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 256 transitions. [2024-06-21 21:35:43,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2024-06-21 21:35:43,687 INFO L175 Difference]: Start difference. First operand has 302 places, 588 transitions, 11543 flow. Second operand 13 states and 256 transitions. [2024-06-21 21:35:43,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 743 transitions, 15248 flow