./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe015_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_rmo.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:56:49,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:56:49,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:56:49,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:56:49,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:56:49,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:56:49,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:56:49,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:56:49,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:56:49,460 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:56:49,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:56:49,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:56:49,461 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:56:49,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:56:49,461 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:56:49,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:56:49,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:56:49,461 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:56:49,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:56:49,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:56:49,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:56:49,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:56:49,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:56:49,462 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:56:49,463 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:56:49,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:56:49,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:56:49,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:56:49,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:56:49,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:56:49,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:56:49,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:56:49,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:49,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:56:49,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:56:49,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:56:49,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:56:49,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:56:49,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:56:49,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:56:49,467 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:56:49,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:56:49,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:56:49,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:56:49,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:56:49,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:56:49,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:56:49,676 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:56:49,676 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:56:49,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-27 18:56:50,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:56:50,875 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:56:50,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-27 18:56:50,891 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc123746/5fa0fbcd9110430082541fe7286de8c0/FLAGbd34b404d [2024-06-27 18:56:50,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc123746/5fa0fbcd9110430082541fe7286de8c0 [2024-06-27 18:56:50,905 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:56:50,905 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:56:50,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_rmo.yml/witness.yml [2024-06-27 18:56:51,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:56:51,102 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:56:51,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:51,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:56:51,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:56:51,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:50" (1/2) ... [2024-06-27 18:56:51,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9daa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:51, skipping insertion in model container [2024-06-27 18:56:51,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:50" (1/2) ... [2024-06-27 18:56:51,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c2560fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:51, skipping insertion in model container [2024-06-27 18:56:51,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:51" (2/2) ... [2024-06-27 18:56:51,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9daa5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51, skipping insertion in model container [2024-06-27 18:56:51,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:51" (2/2) ... [2024-06-27 18:56:51,110 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:56:51,227 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:56:51,228 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 18:56:51,228 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 18:56:51,229 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 18:56:51,229 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:56:51,229 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-27 18:56:51,267 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:56:51,426 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i[988,1001] [2024-06-27 18:56:51,618 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:51,626 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:56:51,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:56:51,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:51,782 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:56:51,783 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51 WrapperNode [2024-06-27 18:56:51,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:51,783 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:51,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:56:51,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:56:51,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,850 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 222 [2024-06-27 18:56:51,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:51,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:56:51,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:56:51,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:56:51,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,875 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,904 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 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]. [2024-06-27 18:56:51,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:56:51,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:56:51,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:56:51,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:56:51,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (1/1) ... [2024-06-27 18:56:51,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:51,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:56:51,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:56:51,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:56:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:56:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:56:52,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:56:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:56:52,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:56:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:56:52,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:56:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:56:52,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:56:52,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:56:52,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:56:52,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:56:52,008 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:56:52,168 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:56:52,170 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:56:52,652 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:56:52,652 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:56:53,007 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:56:53,008 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:56:53,008 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:53 BoogieIcfgContainer [2024-06-27 18:56:53,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:56:53,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:56:53,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:56:53,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:56:53,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:56:50" (1/4) ... [2024-06-27 18:56:53,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd00dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:56:53, skipping insertion in model container [2024-06-27 18:56:53,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:51" (2/4) ... [2024-06-27 18:56:53,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd00dbf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:56:53, skipping insertion in model container [2024-06-27 18:56:53,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:51" (3/4) ... [2024-06-27 18:56:53,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd00dbf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:56:53, skipping insertion in model container [2024-06-27 18:56:53,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:53" (4/4) ... [2024-06-27 18:56:53,015 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_rmo.i [2024-06-27 18:56:53,029 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:56:53,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:56:53,030 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:56:53,090 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:56:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:56:53,152 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 18:56:53,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:53,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 18:56:53,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:56:53,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 42 transitions, 93 flow [2024-06-27 18:56:53,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:56:53,178 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;@5980b1b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:56:53,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:56:53,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:56:53,184 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:56:53,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:53,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:53,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:56:53,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:53,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 793085035, now seen corresponding path program 1 times [2024-06-27 18:56:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658820949] [2024-06-27 18:56:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:54,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:54,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658820949] [2024-06-27 18:56:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658820949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:54,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:54,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:56:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303125764] [2024-06-27 18:56:54,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:56:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:56:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:56:54,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:56:54,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:54,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:56:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:55,832 INFO L124 PetriNetUnfolderBase]: 4076/6261 cut-off events. [2024-06-27 18:56:55,832 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 18:56:55,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12207 conditions, 6261 events. 4076/6261 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35970 event pairs, 2658 based on Foata normal form. 0/6046 useless extension candidates. Maximal degree in co-relation 12195. Up to 5855 conditions per place. [2024-06-27 18:56:55,867 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:56:55,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 235 flow [2024-06-27 18:56:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:56:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:56:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 18:56:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:56:55,879 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 93 flow. Second operand 3 states and 90 transitions. [2024-06-27 18:56:55,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 235 flow [2024-06-27 18:56:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:55,886 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 127 flow [2024-06-27 18:56:55,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 18:56:55,890 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-06-27 18:56:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 127 flow [2024-06-27 18:56:55,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:55,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:55,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:55,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:56:55,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:55,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1946800756, now seen corresponding path program 1 times [2024-06-27 18:56:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:55,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152847154] [2024-06-27 18:56:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:55,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:57,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:57,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152847154] [2024-06-27 18:56:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152847154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:57,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:57,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:56:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618876936] [2024-06-27 18:56:57,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:57,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:56:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:56:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:56:57,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:56:57,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:57,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:57,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:56:57,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:58,019 INFO L124 PetriNetUnfolderBase]: 4064/6243 cut-off events. [2024-06-27 18:56:58,020 INFO L125 PetriNetUnfolderBase]: For 946/946 co-relation queries the response was YES. [2024-06-27 18:56:58,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 6243 events. 4064/6243 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36029 event pairs, 1864 based on Foata normal form. 6/6247 useless extension candidates. Maximal degree in co-relation 13488. Up to 5783 conditions per place. [2024-06-27 18:56:58,051 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 60 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-27 18:56:58,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 341 flow [2024-06-27 18:56:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:56:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:56:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 18:56:58,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:56:58,056 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 127 flow. Second operand 4 states and 120 transitions. [2024-06-27 18:56:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 341 flow [2024-06-27 18:56:58,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:58,058 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 173 flow [2024-06-27 18:56:58,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 18:56:58,059 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-27 18:56:58,059 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 173 flow [2024-06-27 18:56:58,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:58,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:58,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:58,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:56:58,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:58,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -530141070, now seen corresponding path program 1 times [2024-06-27 18:56:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:58,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222040236] [2024-06-27 18:56:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222040236] [2024-06-27 18:57:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222040236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:00,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:00,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:57:00,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338110198] [2024-06-27 18:57:00,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:57:00,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:57:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:57:00,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:57:00,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:00,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:00,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:57:00,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:01,834 INFO L124 PetriNetUnfolderBase]: 4055/6228 cut-off events. [2024-06-27 18:57:01,835 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2024-06-27 18:57:01,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14777 conditions, 6228 events. 4055/6228 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35839 event pairs, 1406 based on Foata normal form. 6/6232 useless extension candidates. Maximal degree in co-relation 14763. Up to 5714 conditions per place. [2024-06-27 18:57:01,869 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-27 18:57:01,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 514 flow [2024-06-27 18:57:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 18:57:01,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 18:57:01,875 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 173 flow. Second operand 6 states and 172 transitions. [2024-06-27 18:57:01,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 514 flow [2024-06-27 18:57:01,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:01,879 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-06-27 18:57:01,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 18:57:01,881 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-27 18:57:01,881 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-06-27 18:57:01,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:01,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:01,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:57:01,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:01,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:01,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1799167835, now seen corresponding path program 1 times [2024-06-27 18:57:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:01,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710551640] [2024-06-27 18:57:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:03,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:03,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710551640] [2024-06-27 18:57:03,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710551640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:03,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:57:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450184683] [2024-06-27 18:57:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:57:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:57:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:57:03,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:03,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-27 18:57:03,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:03,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:03,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:04,559 INFO L124 PetriNetUnfolderBase]: 4050/6222 cut-off events. [2024-06-27 18:57:04,560 INFO L125 PetriNetUnfolderBase]: For 5138/5138 co-relation queries the response was YES. [2024-06-27 18:57:04,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16036 conditions, 6222 events. 4050/6222 cut-off events. For 5138/5138 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35847 event pairs, 1608 based on Foata normal form. 2/6220 useless extension candidates. Maximal degree in co-relation 16019. Up to 5752 conditions per place. [2024-06-27 18:57:04,586 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 18:57:04,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 509 flow [2024-06-27 18:57:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:57:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:57:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 18:57:04,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:57:04,588 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 5 states and 125 transitions. [2024-06-27 18:57:04,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 509 flow [2024-06-27 18:57:04,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 471 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:04,592 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 296 flow [2024-06-27 18:57:04,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-27 18:57:04,593 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-27 18:57:04,593 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 296 flow [2024-06-27 18:57:04,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-27 18:57:04,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:04,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:57:04,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:04,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -40023193, now seen corresponding path program 1 times [2024-06-27 18:57:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:04,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600942644] [2024-06-27 18:57:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:04,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600942644] [2024-06-27 18:57:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600942644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:05,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:57:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847705490] [2024-06-27 18:57:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:05,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:57:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:57:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:57:05,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:05,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:05,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:05,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:05,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:07,153 INFO L124 PetriNetUnfolderBase]: 4040/6208 cut-off events. [2024-06-27 18:57:07,153 INFO L125 PetriNetUnfolderBase]: For 8041/8044 co-relation queries the response was YES. [2024-06-27 18:57:07,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17478 conditions, 6208 events. 4040/6208 cut-off events. For 8041/8044 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35817 event pairs, 1604 based on Foata normal form. 6/6211 useless extension candidates. Maximal degree in co-relation 17458. Up to 5744 conditions per place. [2024-06-27 18:57:07,179 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 67 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-27 18:57:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 508 flow [2024-06-27 18:57:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:57:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:57:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 18:57:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 18:57:07,181 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 296 flow. Second operand 5 states and 123 transitions. [2024-06-27 18:57:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 508 flow [2024-06-27 18:57:07,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 484 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 18:57:07,186 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 307 flow [2024-06-27 18:57:07,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 18:57:07,187 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-06-27 18:57:07,187 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 307 flow [2024-06-27 18:57:07,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:07,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:07,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:57:07,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash 127090318, now seen corresponding path program 1 times [2024-06-27 18:57:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206083593] [2024-06-27 18:57:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:08,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:08,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206083593] [2024-06-27 18:57:08,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206083593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:08,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:08,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:08,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759699392] [2024-06-27 18:57:08,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:08,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:08,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:08,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:08,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:08,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:08,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:10,198 INFO L124 PetriNetUnfolderBase]: 4066/6255 cut-off events. [2024-06-27 18:57:10,199 INFO L125 PetriNetUnfolderBase]: For 9184/9184 co-relation queries the response was YES. [2024-06-27 18:57:10,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 6255 events. 4066/6255 cut-off events. For 9184/9184 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36106 event pairs, 1467 based on Foata normal form. 2/6252 useless extension candidates. Maximal degree in co-relation 17862. Up to 5637 conditions per place. [2024-06-27 18:57:10,227 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 81 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-27 18:57:10,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 685 flow [2024-06-27 18:57:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:57:10,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-27 18:57:10,229 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 307 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:57:10,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 685 flow [2024-06-27 18:57:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 666 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:10,235 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 423 flow [2024-06-27 18:57:10,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 18:57:10,235 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-06-27 18:57:10,236 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 423 flow [2024-06-27 18:57:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:10,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:10,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:10,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:57:10,236 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:10,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1241418500, now seen corresponding path program 2 times [2024-06-27 18:57:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:10,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698072094] [2024-06-27 18:57:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698072094] [2024-06-27 18:57:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698072094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:11,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:11,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450201616] [2024-06-27 18:57:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:11,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:11,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:11,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:11,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:11,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:13,331 INFO L124 PetriNetUnfolderBase]: 4061/6237 cut-off events. [2024-06-27 18:57:13,332 INFO L125 PetriNetUnfolderBase]: For 13600/13600 co-relation queries the response was YES. [2024-06-27 18:57:13,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 6237 events. 4061/6237 cut-off events. For 13600/13600 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 35933 event pairs, 1483 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 19451. Up to 5634 conditions per place. [2024-06-27 18:57:13,359 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-27 18:57:13,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 768 flow [2024-06-27 18:57:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 18:57:13,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2024-06-27 18:57:13,362 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 423 flow. Second operand 6 states and 151 transitions. [2024-06-27 18:57:13,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 768 flow [2024-06-27 18:57:13,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 723 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:13,373 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 484 flow [2024-06-27 18:57:13,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-27 18:57:13,374 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-27 18:57:13,374 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 484 flow [2024-06-27 18:57:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:13,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:13,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:13,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:57:13,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:13,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1472999014, now seen corresponding path program 1 times [2024-06-27 18:57:13,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:13,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699349265] [2024-06-27 18:57:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:13,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:14,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699349265] [2024-06-27 18:57:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699349265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:14,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:14,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483028004] [2024-06-27 18:57:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:14,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:14,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:14,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:14,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:14,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:15,972 INFO L124 PetriNetUnfolderBase]: 4239/6500 cut-off events. [2024-06-27 18:57:15,972 INFO L125 PetriNetUnfolderBase]: For 16285/16287 co-relation queries the response was YES. [2024-06-27 18:57:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 6500 events. 4239/6500 cut-off events. For 16285/16287 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37381 event pairs, 1468 based on Foata normal form. 6/6501 useless extension candidates. Maximal degree in co-relation 21032. Up to 5772 conditions per place. [2024-06-27 18:57:16,000 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 95 selfloop transitions, 47 changer transitions 0/149 dead transitions. [2024-06-27 18:57:16,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 149 transitions, 1131 flow [2024-06-27 18:57:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 18:57:16,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-27 18:57:16,003 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 484 flow. Second operand 7 states and 188 transitions. [2024-06-27 18:57:16,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 149 transitions, 1131 flow [2024-06-27 18:57:16,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 149 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:16,014 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 741 flow [2024-06-27 18:57:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-06-27 18:57:16,015 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-06-27 18:57:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 741 flow [2024-06-27 18:57:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:16,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:16,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:57:16,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -355166138, now seen corresponding path program 2 times [2024-06-27 18:57:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633402995] [2024-06-27 18:57:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:17,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:17,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633402995] [2024-06-27 18:57:17,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633402995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:17,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:17,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235053363] [2024-06-27 18:57:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:17,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:17,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:17,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:19,050 INFO L124 PetriNetUnfolderBase]: 4335/6654 cut-off events. [2024-06-27 18:57:19,051 INFO L125 PetriNetUnfolderBase]: For 19793/19797 co-relation queries the response was YES. [2024-06-27 18:57:19,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 6654 events. 4335/6654 cut-off events. For 19793/19797 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38297 event pairs, 1483 based on Foata normal form. 10/6659 useless extension candidates. Maximal degree in co-relation 22436. Up to 5854 conditions per place. [2024-06-27 18:57:19,085 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 54 changer transitions 0/147 dead transitions. [2024-06-27 18:57:19,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 1267 flow [2024-06-27 18:57:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 18:57:19,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-27 18:57:19,087 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 741 flow. Second operand 6 states and 158 transitions. [2024-06-27 18:57:19,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 1267 flow [2024-06-27 18:57:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1194 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:19,108 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 896 flow [2024-06-27 18:57:19,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2024-06-27 18:57:19,110 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-27 18:57:19,110 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 896 flow [2024-06-27 18:57:19,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:19,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:19,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:57:19,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:19,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 171000374, now seen corresponding path program 3 times [2024-06-27 18:57:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087496397] [2024-06-27 18:57:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:20,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:20,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087496397] [2024-06-27 18:57:20,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087496397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:20,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:20,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067785722] [2024-06-27 18:57:20,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:20,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:20,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:20,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:20,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:20,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:20,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:22,148 INFO L124 PetriNetUnfolderBase]: 4319/6620 cut-off events. [2024-06-27 18:57:22,148 INFO L125 PetriNetUnfolderBase]: For 22472/22490 co-relation queries the response was YES. [2024-06-27 18:57:22,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 6620 events. 4319/6620 cut-off events. For 22472/22490 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38040 event pairs, 1489 based on Foata normal form. 18/6626 useless extension candidates. Maximal degree in co-relation 22596. Up to 5841 conditions per place. [2024-06-27 18:57:22,182 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 82 selfloop transitions, 53 changer transitions 0/142 dead transitions. [2024-06-27 18:57:22,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1274 flow [2024-06-27 18:57:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:57:22,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:57:22,184 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 896 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:57:22,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1274 flow [2024-06-27 18:57:22,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1161 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:22,203 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 902 flow [2024-06-27 18:57:22,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 18:57:22,204 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-27 18:57:22,204 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 902 flow [2024-06-27 18:57:22,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:22,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:22,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:22,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:57:22,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:22,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:22,205 INFO L85 PathProgramCache]: Analyzing trace with hash 171010294, now seen corresponding path program 1 times [2024-06-27 18:57:22,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:22,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318702759] [2024-06-27 18:57:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318702759] [2024-06-27 18:57:24,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318702759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:24,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:24,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:24,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755990293] [2024-06-27 18:57:24,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:24,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:24,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:24,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:24,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 902 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:24,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:24,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:25,785 INFO L124 PetriNetUnfolderBase]: 4311/6619 cut-off events. [2024-06-27 18:57:25,785 INFO L125 PetriNetUnfolderBase]: For 22391/22394 co-relation queries the response was YES. [2024-06-27 18:57:25,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22492 conditions, 6619 events. 4311/6619 cut-off events. For 22391/22394 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38085 event pairs, 1477 based on Foata normal form. 6/6622 useless extension candidates. Maximal degree in co-relation 22459. Up to 6079 conditions per place. [2024-06-27 18:57:25,815 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 119 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-27 18:57:25,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1290 flow [2024-06-27 18:57:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:57:25,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 18:57:25,817 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 902 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:57:25,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1290 flow [2024-06-27 18:57:25,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1063 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 18:57:25,833 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 751 flow [2024-06-27 18:57:25,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2024-06-27 18:57:25,834 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-27 18:57:25,834 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 751 flow [2024-06-27 18:57:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:25,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:25,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:25,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:57:25,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:25,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1034441383, now seen corresponding path program 1 times [2024-06-27 18:57:25,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:25,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319121114] [2024-06-27 18:57:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319121114] [2024-06-27 18:57:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319121114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:28,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:28,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007238642] [2024-06-27 18:57:28,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:28,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:28,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:28,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:28,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:28,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:28,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:29,960 INFO L124 PetriNetUnfolderBase]: 4399/6769 cut-off events. [2024-06-27 18:57:29,960 INFO L125 PetriNetUnfolderBase]: For 23212/23212 co-relation queries the response was YES. [2024-06-27 18:57:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23333 conditions, 6769 events. 4399/6769 cut-off events. For 23212/23212 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39162 event pairs, 1470 based on Foata normal form. 2/6769 useless extension candidates. Maximal degree in co-relation 23301. Up to 6156 conditions per place. [2024-06-27 18:57:30,050 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 146 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-27 18:57:30,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 178 transitions, 1381 flow [2024-06-27 18:57:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:57:30,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:57:30,052 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 751 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:57:30,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 178 transitions, 1381 flow [2024-06-27 18:57:30,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 178 transitions, 1329 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:30,072 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 851 flow [2024-06-27 18:57:30,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-27 18:57:30,072 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-27 18:57:30,073 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 851 flow [2024-06-27 18:57:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:30,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:30,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:30,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:57:30,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:30,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:30,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1034321413, now seen corresponding path program 2 times [2024-06-27 18:57:30,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:30,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412539679] [2024-06-27 18:57:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412539679] [2024-06-27 18:57:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412539679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242183432] [2024-06-27 18:57:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:32,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:32,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 851 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:32,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:32,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:32,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:34,116 INFO L124 PetriNetUnfolderBase]: 4425/6797 cut-off events. [2024-06-27 18:57:34,116 INFO L125 PetriNetUnfolderBase]: For 29699/29699 co-relation queries the response was YES. [2024-06-27 18:57:34,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24984 conditions, 6797 events. 4425/6797 cut-off events. For 29699/29699 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 39302 event pairs, 1337 based on Foata normal form. 2/6794 useless extension candidates. Maximal degree in co-relation 24950. Up to 5679 conditions per place. [2024-06-27 18:57:34,150 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 105 selfloop transitions, 64 changer transitions 0/176 dead transitions. [2024-06-27 18:57:34,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1477 flow [2024-06-27 18:57:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 18:57:34,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-27 18:57:34,153 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 851 flow. Second operand 7 states and 183 transitions. [2024-06-27 18:57:34,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1477 flow [2024-06-27 18:57:34,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 1394 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:34,178 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1053 flow [2024-06-27 18:57:34,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-06-27 18:57:34,178 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-27 18:57:34,178 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1053 flow [2024-06-27 18:57:34,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:34,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:34,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:34,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:57:34,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:34,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 997764475, now seen corresponding path program 3 times [2024-06-27 18:57:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614554065] [2024-06-27 18:57:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:36,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:36,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614554065] [2024-06-27 18:57:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614554065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:36,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905336257] [2024-06-27 18:57:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:36,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:36,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:36,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:36,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:36,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:36,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:38,112 INFO L124 PetriNetUnfolderBase]: 4420/6745 cut-off events. [2024-06-27 18:57:38,112 INFO L125 PetriNetUnfolderBase]: For 37329/37329 co-relation queries the response was YES. [2024-06-27 18:57:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26888 conditions, 6745 events. 4420/6745 cut-off events. For 37329/37329 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38671 event pairs, 1423 based on Foata normal form. 2/6723 useless extension candidates. Maximal degree in co-relation 26853. Up to 5676 conditions per place. [2024-06-27 18:57:38,146 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 98 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2024-06-27 18:57:38,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 175 transitions, 1630 flow [2024-06-27 18:57:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:57:38,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 18:57:38,148 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1053 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:57:38,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 175 transitions, 1630 flow [2024-06-27 18:57:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1543 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:38,179 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1177 flow [2024-06-27 18:57:38,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-27 18:57:38,180 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-06-27 18:57:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1177 flow [2024-06-27 18:57:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:57:38,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:38,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2104639860, now seen corresponding path program 1 times [2024-06-27 18:57:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977401423] [2024-06-27 18:57:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977401423] [2024-06-27 18:57:39,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977401423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:39,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:39,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:57:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330974583] [2024-06-27 18:57:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:57:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:57:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:57:39,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:39,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1177 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:39,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:39,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:39,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:41,060 INFO L124 PetriNetUnfolderBase]: 4417/6777 cut-off events. [2024-06-27 18:57:41,060 INFO L125 PetriNetUnfolderBase]: For 36520/36520 co-relation queries the response was YES. [2024-06-27 18:57:41,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26569 conditions, 6777 events. 4417/6777 cut-off events. For 36520/36520 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39118 event pairs, 1473 based on Foata normal form. 1/6776 useless extension candidates. Maximal degree in co-relation 26532. Up to 6304 conditions per place. [2024-06-27 18:57:41,097 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 138 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2024-06-27 18:57:41,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1593 flow [2024-06-27 18:57:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:57:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:57:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:57:41,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-27 18:57:41,099 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1177 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:57:41,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1593 flow [2024-06-27 18:57:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1468 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:41,129 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1146 flow [2024-06-27 18:57:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1146, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-27 18:57:41,129 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2024-06-27 18:57:41,129 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1146 flow [2024-06-27 18:57:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:41,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:41,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:57:41,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:41,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2002910501, now seen corresponding path program 1 times [2024-06-27 18:57:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539054208] [2024-06-27 18:57:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539054208] [2024-06-27 18:57:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539054208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481374765] [2024-06-27 18:57:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:43,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:45,259 INFO L124 PetriNetUnfolderBase]: 4407/6780 cut-off events. [2024-06-27 18:57:45,259 INFO L125 PetriNetUnfolderBase]: For 40808/40808 co-relation queries the response was YES. [2024-06-27 18:57:45,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27128 conditions, 6780 events. 4407/6780 cut-off events. For 40808/40808 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39324 event pairs, 1479 based on Foata normal form. 4/6782 useless extension candidates. Maximal degree in co-relation 27088. Up to 6173 conditions per place. [2024-06-27 18:57:45,299 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 162 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2024-06-27 18:57:45,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 194 transitions, 1686 flow [2024-06-27 18:57:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:57:45,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 18:57:45,301 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1146 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:57:45,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 194 transitions, 1686 flow [2024-06-27 18:57:45,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 194 transitions, 1654 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 18:57:45,337 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1173 flow [2024-06-27 18:57:45,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2024-06-27 18:57:45,337 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-27 18:57:45,337 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1173 flow [2024-06-27 18:57:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:45,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:45,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:45,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:57:45,338 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:45,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 880430151, now seen corresponding path program 2 times [2024-06-27 18:57:45,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:45,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919551897] [2024-06-27 18:57:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:45,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919551897] [2024-06-27 18:57:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919551897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:47,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:47,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:47,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671079833] [2024-06-27 18:57:47,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:47,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:47,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:47,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:47,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1173 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:47,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:49,083 INFO L124 PetriNetUnfolderBase]: 4521/6971 cut-off events. [2024-06-27 18:57:49,083 INFO L125 PetriNetUnfolderBase]: For 45234/45238 co-relation queries the response was YES. [2024-06-27 18:57:49,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28388 conditions, 6971 events. 4521/6971 cut-off events. For 45234/45238 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40639 event pairs, 1326 based on Foata normal form. 8/6974 useless extension candidates. Maximal degree in co-relation 28345. Up to 5760 conditions per place. [2024-06-27 18:57:49,128 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 113 selfloop transitions, 77 changer transitions 0/197 dead transitions. [2024-06-27 18:57:49,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 197 transitions, 1929 flow [2024-06-27 18:57:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 18:57:49,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-27 18:57:49,129 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1173 flow. Second operand 7 states and 187 transitions. [2024-06-27 18:57:49,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 197 transitions, 1929 flow [2024-06-27 18:57:49,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1879 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:49,233 INFO L231 Difference]: Finished difference. Result has 104 places, 143 transitions, 1400 flow [2024-06-27 18:57:49,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=104, PETRI_TRANSITIONS=143} [2024-06-27 18:57:49,234 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-27 18:57:49,234 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 143 transitions, 1400 flow [2024-06-27 18:57:49,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:49,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:49,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:57:49,235 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:49,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1855300901, now seen corresponding path program 3 times [2024-06-27 18:57:49,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:49,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349877011] [2024-06-27 18:57:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:49,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:51,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:51,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349877011] [2024-06-27 18:57:51,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349877011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:51,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:51,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272602893] [2024-06-27 18:57:51,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:51,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:51,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:51,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:51,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 143 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:51,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:51,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:53,715 INFO L124 PetriNetUnfolderBase]: 4573/7032 cut-off events. [2024-06-27 18:57:53,715 INFO L125 PetriNetUnfolderBase]: For 50681/50681 co-relation queries the response was YES. [2024-06-27 18:57:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29470 conditions, 7032 events. 4573/7032 cut-off events. For 50681/50681 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40797 event pairs, 1341 based on Foata normal form. 4/7031 useless extension candidates. Maximal degree in co-relation 29426. Up to 5804 conditions per place. [2024-06-27 18:57:53,756 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 121 selfloop transitions, 79 changer transitions 0/207 dead transitions. [2024-06-27 18:57:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 2092 flow [2024-06-27 18:57:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:57:53,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 18:57:53,758 INFO L175 Difference]: Start difference. First operand has 104 places, 143 transitions, 1400 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:57:53,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 2092 flow [2024-06-27 18:57:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 1978 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:53,804 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1517 flow [2024-06-27 18:57:53,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2024-06-27 18:57:53,805 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-27 18:57:53,805 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1517 flow [2024-06-27 18:57:53,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:53,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:53,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:53,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:57:53,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:53,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1855085575, now seen corresponding path program 1 times [2024-06-27 18:57:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789509420] [2024-06-27 18:57:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:55,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:55,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789509420] [2024-06-27 18:57:55,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789509420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:55,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:55,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571299604] [2024-06-27 18:57:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:55,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:55,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:55,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:57:55,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1517 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:55,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:55,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:57:55,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:57,710 INFO L124 PetriNetUnfolderBase]: 4615/7105 cut-off events. [2024-06-27 18:57:57,710 INFO L125 PetriNetUnfolderBase]: For 55579/55583 co-relation queries the response was YES. [2024-06-27 18:57:57,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 7105 events. 4615/7105 cut-off events. For 55579/55583 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 41328 event pairs, 1360 based on Foata normal form. 8/7108 useless extension candidates. Maximal degree in co-relation 29906. Up to 6198 conditions per place. [2024-06-27 18:57:57,751 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 135 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-27 18:57:57,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2075 flow [2024-06-27 18:57:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:57:57,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 18:57:57,753 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1517 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:57:57,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2075 flow [2024-06-27 18:57:57,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 1885 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:57,821 INFO L231 Difference]: Finished difference. Result has 110 places, 150 transitions, 1495 flow [2024-06-27 18:57:57,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=110, PETRI_TRANSITIONS=150} [2024-06-27 18:57:57,821 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-27 18:57:57,821 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 150 transitions, 1495 flow [2024-06-27 18:57:57,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:57,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:57,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:57:57,822 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:57,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash 865928953, now seen corresponding path program 4 times [2024-06-27 18:57:57,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:57,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750636650] [2024-06-27 18:57:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750636650] [2024-06-27 18:58:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750636650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:00,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:00,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:00,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503746872] [2024-06-27 18:58:00,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:00,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:00,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:00,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:00,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:00,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:00,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:00,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:02,279 INFO L124 PetriNetUnfolderBase]: 4605/7010 cut-off events. [2024-06-27 18:58:02,279 INFO L125 PetriNetUnfolderBase]: For 60496/60496 co-relation queries the response was YES. [2024-06-27 18:58:02,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30264 conditions, 7010 events. 4605/7010 cut-off events. For 60496/60496 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 40151 event pairs, 1471 based on Foata normal form. 4/6988 useless extension candidates. Maximal degree in co-relation 30218. Up to 5858 conditions per place. [2024-06-27 18:58:02,321 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 117 selfloop transitions, 82 changer transitions 0/206 dead transitions. [2024-06-27 18:58:02,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 206 transitions, 2123 flow [2024-06-27 18:58:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:58:02,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 18:58:02,323 INFO L175 Difference]: Start difference. First operand has 110 places, 150 transitions, 1495 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:58:02,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 206 transitions, 2123 flow [2024-06-27 18:58:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1965 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:02,374 INFO L231 Difference]: Finished difference. Result has 113 places, 150 transitions, 1510 flow [2024-06-27 18:58:02,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1510, PETRI_PLACES=113, PETRI_TRANSITIONS=150} [2024-06-27 18:58:02,375 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-06-27 18:58:02,375 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 150 transitions, 1510 flow [2024-06-27 18:58:02,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:02,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:02,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:58:02,375 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:02,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 260789093, now seen corresponding path program 5 times [2024-06-27 18:58:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:02,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377060638] [2024-06-27 18:58:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:04,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:04,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377060638] [2024-06-27 18:58:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377060638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:04,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:04,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417830344] [2024-06-27 18:58:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:04,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:04,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 150 transitions, 1510 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:04,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:04,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:04,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:06,274 INFO L124 PetriNetUnfolderBase]: 4595/7043 cut-off events. [2024-06-27 18:58:06,274 INFO L125 PetriNetUnfolderBase]: For 62879/62891 co-relation queries the response was YES. [2024-06-27 18:58:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30385 conditions, 7043 events. 4595/7043 cut-off events. For 62879/62891 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40886 event pairs, 1374 based on Foata normal form. 12/7037 useless extension candidates. Maximal degree in co-relation 30338. Up to 5850 conditions per place. [2024-06-27 18:58:06,317 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 110 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-27 18:58:06,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2022 flow [2024-06-27 18:58:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:58:06,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 18:58:06,319 INFO L175 Difference]: Start difference. First operand has 113 places, 150 transitions, 1510 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:58:06,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2022 flow [2024-06-27 18:58:06,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1796 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 18:58:06,391 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1452 flow [2024-06-27 18:58:06,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2024-06-27 18:58:06,391 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-27 18:58:06,391 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1452 flow [2024-06-27 18:58:06,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:06,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:06,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:06,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:58:06,392 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:06,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1131841559, now seen corresponding path program 2 times [2024-06-27 18:58:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:06,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690454210] [2024-06-27 18:58:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690454210] [2024-06-27 18:58:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690454210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143819583] [2024-06-27 18:58:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:08,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:08,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1452 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:08,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:08,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:08,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:10,215 INFO L124 PetriNetUnfolderBase]: 4637/7147 cut-off events. [2024-06-27 18:58:10,215 INFO L125 PetriNetUnfolderBase]: For 64888/64900 co-relation queries the response was YES. [2024-06-27 18:58:10,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30710 conditions, 7147 events. 4637/7147 cut-off events. For 64888/64900 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 41599 event pairs, 1381 based on Foata normal form. 12/7147 useless extension candidates. Maximal degree in co-relation 30663. Up to 6242 conditions per place. [2024-06-27 18:58:10,261 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 136 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2024-06-27 18:58:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 199 transitions, 2014 flow [2024-06-27 18:58:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:58:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 18:58:10,262 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1452 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:58:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 199 transitions, 2014 flow [2024-06-27 18:58:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1636 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 18:58:10,326 INFO L231 Difference]: Finished difference. Result has 109 places, 153 transitions, 1245 flow [2024-06-27 18:58:10,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=109, PETRI_TRANSITIONS=153} [2024-06-27 18:58:10,327 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-27 18:58:10,327 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 153 transitions, 1245 flow [2024-06-27 18:58:10,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:10,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:10,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:58:10,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:10,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1132167989, now seen corresponding path program 3 times [2024-06-27 18:58:10,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:10,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814656049] [2024-06-27 18:58:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814656049] [2024-06-27 18:58:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814656049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204876149] [2024-06-27 18:58:12,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:12,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:12,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 153 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:12,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:12,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:12,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:13,939 INFO L124 PetriNetUnfolderBase]: 4629/7015 cut-off events. [2024-06-27 18:58:13,939 INFO L125 PetriNetUnfolderBase]: For 67142/67154 co-relation queries the response was YES. [2024-06-27 18:58:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30444 conditions, 7015 events. 4629/7015 cut-off events. For 67142/67154 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40354 event pairs, 1293 based on Foata normal form. 12/7015 useless extension candidates. Maximal degree in co-relation 30399. Up to 6088 conditions per place. [2024-06-27 18:58:13,983 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 130 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-27 18:58:13,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1809 flow [2024-06-27 18:58:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:58:13,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 18:58:13,984 INFO L175 Difference]: Start difference. First operand has 109 places, 153 transitions, 1245 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:58:13,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1809 flow [2024-06-27 18:58:14,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 201 transitions, 1664 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:14,047 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1292 flow [2024-06-27 18:58:14,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2024-06-27 18:58:14,048 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-27 18:58:14,048 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1292 flow [2024-06-27 18:58:14,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:14,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:14,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:58:14,048 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:14,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash 819328636, now seen corresponding path program 1 times [2024-06-27 18:58:14,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:14,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033320240] [2024-06-27 18:58:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:15,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033320240] [2024-06-27 18:58:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033320240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:15,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:15,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279112791] [2024-06-27 18:58:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:15,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:15,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1292 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:15,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:15,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:17,543 INFO L124 PetriNetUnfolderBase]: 4723/7273 cut-off events. [2024-06-27 18:58:17,543 INFO L125 PetriNetUnfolderBase]: For 74263/74263 co-relation queries the response was YES. [2024-06-27 18:58:17,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31796 conditions, 7273 events. 4723/7273 cut-off events. For 74263/74263 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 42222 event pairs, 1471 based on Foata normal form. 6/7269 useless extension candidates. Maximal degree in co-relation 31750. Up to 6395 conditions per place. [2024-06-27 18:58:17,582 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 171 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2024-06-27 18:58:17,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 203 transitions, 1976 flow [2024-06-27 18:58:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:58:17,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-27 18:58:17,583 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1292 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:58:17,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 203 transitions, 1976 flow [2024-06-27 18:58:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 203 transitions, 1808 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:17,648 INFO L231 Difference]: Finished difference. Result has 114 places, 167 transitions, 1311 flow [2024-06-27 18:58:17,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=114, PETRI_TRANSITIONS=167} [2024-06-27 18:58:17,648 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-27 18:58:17,648 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 167 transitions, 1311 flow [2024-06-27 18:58:17,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:17,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:17,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:58:17,649 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:17,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1801691548, now seen corresponding path program 1 times [2024-06-27 18:58:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:17,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014737578] [2024-06-27 18:58:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:19,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:19,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014737578] [2024-06-27 18:58:19,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014737578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:19,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066165625] [2024-06-27 18:58:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:19,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:19,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 167 transitions, 1311 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:19,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:19,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:19,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:21,484 INFO L124 PetriNetUnfolderBase]: 5191/7898 cut-off events. [2024-06-27 18:58:21,484 INFO L125 PetriNetUnfolderBase]: For 94516/94516 co-relation queries the response was YES. [2024-06-27 18:58:21,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37208 conditions, 7898 events. 5191/7898 cut-off events. For 94516/94516 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 46357 event pairs, 1587 based on Foata normal form. 4/7900 useless extension candidates. Maximal degree in co-relation 37159. Up to 6767 conditions per place. [2024-06-27 18:58:21,533 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 232 selfloop transitions, 48 changer transitions 0/287 dead transitions. [2024-06-27 18:58:21,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 287 transitions, 2456 flow [2024-06-27 18:58:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:58:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:58:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-27 18:58:21,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 18:58:21,535 INFO L175 Difference]: Start difference. First operand has 114 places, 167 transitions, 1311 flow. Second operand 11 states and 288 transitions. [2024-06-27 18:58:21,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 287 transitions, 2456 flow [2024-06-27 18:58:21,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 287 transitions, 2438 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 18:58:21,628 INFO L231 Difference]: Finished difference. Result has 127 places, 191 transitions, 1666 flow [2024-06-27 18:58:21,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1666, PETRI_PLACES=127, PETRI_TRANSITIONS=191} [2024-06-27 18:58:21,629 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-27 18:58:21,629 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 191 transitions, 1666 flow [2024-06-27 18:58:21,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:21,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:21,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:21,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:58:21,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:21,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1963543976, now seen corresponding path program 2 times [2024-06-27 18:58:21,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:21,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282086429] [2024-06-27 18:58:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282086429] [2024-06-27 18:58:24,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282086429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:24,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:24,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:24,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799199455] [2024-06-27 18:58:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:24,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:24,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:24,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:24,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 191 transitions, 1666 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:24,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:24,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:24,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:26,433 INFO L124 PetriNetUnfolderBase]: 5509/8480 cut-off events. [2024-06-27 18:58:26,433 INFO L125 PetriNetUnfolderBase]: For 120821/120821 co-relation queries the response was YES. [2024-06-27 18:58:26,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42450 conditions, 8480 events. 5509/8480 cut-off events. For 120821/120821 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 50752 event pairs, 1205 based on Foata normal form. 4/8482 useless extension candidates. Maximal degree in co-relation 42395. Up to 6763 conditions per place. [2024-06-27 18:58:26,484 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 214 selfloop transitions, 51 changer transitions 0/272 dead transitions. [2024-06-27 18:58:26,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 272 transitions, 2682 flow [2024-06-27 18:58:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:58:26,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 18:58:26,486 INFO L175 Difference]: Start difference. First operand has 127 places, 191 transitions, 1666 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:58:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 272 transitions, 2682 flow [2024-06-27 18:58:26,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 272 transitions, 2583 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:26,615 INFO L231 Difference]: Finished difference. Result has 132 places, 196 transitions, 1803 flow [2024-06-27 18:58:26,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1803, PETRI_PLACES=132, PETRI_TRANSITIONS=196} [2024-06-27 18:58:26,616 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 80 predicate places. [2024-06-27 18:58:26,616 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 196 transitions, 1803 flow [2024-06-27 18:58:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:26,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:26,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:58:26,617 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:26,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash -729038034, now seen corresponding path program 3 times [2024-06-27 18:58:26,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:26,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983035160] [2024-06-27 18:58:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983035160] [2024-06-27 18:58:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983035160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:29,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:29,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:29,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430367938] [2024-06-27 18:58:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:29,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:29,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:29,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:29,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 196 transitions, 1803 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:29,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:29,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:29,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:31,232 INFO L124 PetriNetUnfolderBase]: 5493/8454 cut-off events. [2024-06-27 18:58:31,232 INFO L125 PetriNetUnfolderBase]: For 127495/127495 co-relation queries the response was YES. [2024-06-27 18:58:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43000 conditions, 8454 events. 5493/8454 cut-off events. For 127495/127495 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50550 event pairs, 1609 based on Foata normal form. 8/8460 useless extension candidates. Maximal degree in co-relation 42943. Up to 7627 conditions per place. [2024-06-27 18:58:31,294 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 223 selfloop transitions, 41 changer transitions 0/271 dead transitions. [2024-06-27 18:58:31,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 271 transitions, 2697 flow [2024-06-27 18:58:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:58:31,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 18:58:31,296 INFO L175 Difference]: Start difference. First operand has 132 places, 196 transitions, 1803 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:58:31,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 271 transitions, 2697 flow [2024-06-27 18:58:31,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 271 transitions, 2570 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:31,527 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1897 flow [2024-06-27 18:58:31,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1897, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-27 18:58:31,528 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 84 predicate places. [2024-06-27 18:58:31,528 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1897 flow [2024-06-27 18:58:31,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:31,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:31,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:31,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:58:31,529 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:31,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1679756712, now seen corresponding path program 4 times [2024-06-27 18:58:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549814604] [2024-06-27 18:58:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:33,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:33,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549814604] [2024-06-27 18:58:33,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549814604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:33,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:33,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:33,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073784770] [2024-06-27 18:58:33,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:33,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:33,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1897 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:36,432 INFO L124 PetriNetUnfolderBase]: 5535/8516 cut-off events. [2024-06-27 18:58:36,432 INFO L125 PetriNetUnfolderBase]: For 122281/122281 co-relation queries the response was YES. [2024-06-27 18:58:36,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43111 conditions, 8516 events. 5535/8516 cut-off events. For 122281/122281 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50798 event pairs, 1361 based on Foata normal form. 4/8515 useless extension candidates. Maximal degree in co-relation 43052. Up to 7140 conditions per place. [2024-06-27 18:58:36,493 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 163 selfloop transitions, 93 changer transitions 0/263 dead transitions. [2024-06-27 18:58:36,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 263 transitions, 2687 flow [2024-06-27 18:58:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:58:36,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 18:58:36,495 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 1897 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:58:36,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 263 transitions, 2687 flow [2024-06-27 18:58:36,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 263 transitions, 2534 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:36,654 INFO L231 Difference]: Finished difference. Result has 137 places, 204 transitions, 2012 flow [2024-06-27 18:58:36,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2012, PETRI_PLACES=137, PETRI_TRANSITIONS=204} [2024-06-27 18:58:36,655 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-06-27 18:58:36,655 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 204 transitions, 2012 flow [2024-06-27 18:58:36,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:36,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:36,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:36,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:58:36,655 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -383008653, now seen corresponding path program 1 times [2024-06-27 18:58:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568365696] [2024-06-27 18:58:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568365696] [2024-06-27 18:58:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568365696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595137218] [2024-06-27 18:58:38,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:38,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 204 transitions, 2012 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:40,318 INFO L124 PetriNetUnfolderBase]: 5581/8575 cut-off events. [2024-06-27 18:58:40,318 INFO L125 PetriNetUnfolderBase]: For 131420/131420 co-relation queries the response was YES. [2024-06-27 18:58:40,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 8575 events. 5581/8575 cut-off events. For 131420/131420 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 51170 event pairs, 1504 based on Foata normal form. 2/8575 useless extension candidates. Maximal degree in co-relation 44130. Up to 7619 conditions per place. [2024-06-27 18:58:40,378 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 213 selfloop transitions, 31 changer transitions 0/251 dead transitions. [2024-06-27 18:58:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 2816 flow [2024-06-27 18:58:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 18:58:40,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-27 18:58:40,381 INFO L175 Difference]: Start difference. First operand has 137 places, 204 transitions, 2012 flow. Second operand 6 states and 158 transitions. [2024-06-27 18:58:40,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 2816 flow [2024-06-27 18:58:40,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 251 transitions, 2572 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:40,516 INFO L231 Difference]: Finished difference. Result has 137 places, 207 transitions, 1870 flow [2024-06-27 18:58:40,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1870, PETRI_PLACES=137, PETRI_TRANSITIONS=207} [2024-06-27 18:58:40,517 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-06-27 18:58:40,517 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 207 transitions, 1870 flow [2024-06-27 18:58:40,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:40,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:40,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:40,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:58:40,517 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:40,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 44739160, now seen corresponding path program 5 times [2024-06-27 18:58:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983212646] [2024-06-27 18:58:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:42,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:42,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983212646] [2024-06-27 18:58:42,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983212646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:42,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:42,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:42,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640908803] [2024-06-27 18:58:42,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:42,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:42,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:42,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 207 transitions, 1870 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:42,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:42,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:42,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:45,329 INFO L124 PetriNetUnfolderBase]: 5573/8534 cut-off events. [2024-06-27 18:58:45,329 INFO L125 PetriNetUnfolderBase]: For 133361/133361 co-relation queries the response was YES. [2024-06-27 18:58:45,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43534 conditions, 8534 events. 5573/8534 cut-off events. For 133361/133361 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50595 event pairs, 1516 based on Foata normal form. 4/8509 useless extension candidates. Maximal degree in co-relation 43473. Up to 7190 conditions per place. [2024-06-27 18:58:45,391 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 163 selfloop transitions, 96 changer transitions 0/266 dead transitions. [2024-06-27 18:58:45,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 266 transitions, 2666 flow [2024-06-27 18:58:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:58:45,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:58:45,394 INFO L175 Difference]: Start difference. First operand has 137 places, 207 transitions, 1870 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:58:45,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 266 transitions, 2666 flow [2024-06-27 18:58:45,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 266 transitions, 2615 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:45,582 INFO L231 Difference]: Finished difference. Result has 141 places, 210 transitions, 2099 flow [2024-06-27 18:58:45,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2099, PETRI_PLACES=141, PETRI_TRANSITIONS=210} [2024-06-27 18:58:45,583 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 89 predicate places. [2024-06-27 18:58:45,583 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 210 transitions, 2099 flow [2024-06-27 18:58:45,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:45,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:45,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:45,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:58:45,584 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:45,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash -370628493, now seen corresponding path program 2 times [2024-06-27 18:58:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268294670] [2024-06-27 18:58:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268294670] [2024-06-27 18:58:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268294670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:47,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:47,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173455325] [2024-06-27 18:58:47,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:47,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:47,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:47,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:47,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 210 transitions, 2099 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:47,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:47,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:47,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:49,389 INFO L124 PetriNetUnfolderBase]: 5547/8438 cut-off events. [2024-06-27 18:58:49,389 INFO L125 PetriNetUnfolderBase]: For 143896/143896 co-relation queries the response was YES. [2024-06-27 18:58:49,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44189 conditions, 8438 events. 5547/8438 cut-off events. For 143896/143896 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 49920 event pairs, 1470 based on Foata normal form. 6/8431 useless extension candidates. Maximal degree in co-relation 44128. Up to 7588 conditions per place. [2024-06-27 18:58:49,457 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 208 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-06-27 18:58:49,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 245 transitions, 2761 flow [2024-06-27 18:58:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:58:49,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 18:58:49,458 INFO L175 Difference]: Start difference. First operand has 141 places, 210 transitions, 2099 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:58:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 245 transitions, 2761 flow [2024-06-27 18:58:49,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 245 transitions, 2503 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:49,644 INFO L231 Difference]: Finished difference. Result has 141 places, 210 transitions, 1909 flow [2024-06-27 18:58:49,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1909, PETRI_PLACES=141, PETRI_TRANSITIONS=210} [2024-06-27 18:58:49,644 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 89 predicate places. [2024-06-27 18:58:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 210 transitions, 1909 flow [2024-06-27 18:58:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:49,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:49,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:58:49,645 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:49,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -376335469, now seen corresponding path program 1 times [2024-06-27 18:58:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459172030] [2024-06-27 18:58:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459172030] [2024-06-27 18:58:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459172030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:51,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:51,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127394926] [2024-06-27 18:58:51,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:51,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:51,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:51,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:51,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 210 transitions, 1909 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:51,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:51,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:51,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:53,331 INFO L124 PetriNetUnfolderBase]: 5570/8552 cut-off events. [2024-06-27 18:58:53,331 INFO L125 PetriNetUnfolderBase]: For 144936/144936 co-relation queries the response was YES. [2024-06-27 18:58:53,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 8552 events. 5570/8552 cut-off events. For 144936/144936 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 50861 event pairs, 1577 based on Foata normal form. 1/8549 useless extension candidates. Maximal degree in co-relation 43934. Up to 7837 conditions per place. [2024-06-27 18:58:53,395 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 226 selfloop transitions, 24 changer transitions 0/257 dead transitions. [2024-06-27 18:58:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 257 transitions, 2879 flow [2024-06-27 18:58:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:58:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:58:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:58:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-27 18:58:53,396 INFO L175 Difference]: Start difference. First operand has 141 places, 210 transitions, 1909 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:58:53,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 257 transitions, 2879 flow [2024-06-27 18:58:53,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 257 transitions, 2808 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:53,585 INFO L231 Difference]: Finished difference. Result has 144 places, 220 transitions, 2063 flow [2024-06-27 18:58:53,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2063, PETRI_PLACES=144, PETRI_TRANSITIONS=220} [2024-06-27 18:58:53,585 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 92 predicate places. [2024-06-27 18:58:53,585 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 220 transitions, 2063 flow [2024-06-27 18:58:53,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:53,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:53,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:53,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:58:53,586 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:53,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1031640821, now seen corresponding path program 2 times [2024-06-27 18:58:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:53,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260597095] [2024-06-27 18:58:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:55,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:55,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260597095] [2024-06-27 18:58:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260597095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:55,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615622105] [2024-06-27 18:58:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:58:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 220 transitions, 2063 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:58:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:57,219 INFO L124 PetriNetUnfolderBase]: 5624/8640 cut-off events. [2024-06-27 18:58:57,219 INFO L125 PetriNetUnfolderBase]: For 155590/155590 co-relation queries the response was YES. [2024-06-27 18:58:57,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45764 conditions, 8640 events. 5624/8640 cut-off events. For 155590/155590 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 51535 event pairs, 1643 based on Foata normal form. 1/8639 useless extension candidates. Maximal degree in co-relation 45699. Up to 8023 conditions per place. [2024-06-27 18:58:57,286 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 237 selfloop transitions, 19 changer transitions 0/263 dead transitions. [2024-06-27 18:58:57,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 263 transitions, 2908 flow [2024-06-27 18:58:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:58:57,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 18:58:57,288 INFO L175 Difference]: Start difference. First operand has 144 places, 220 transitions, 2063 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:58:57,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 263 transitions, 2908 flow [2024-06-27 18:58:57,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 263 transitions, 2830 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-27 18:58:57,502 INFO L231 Difference]: Finished difference. Result has 151 places, 228 transitions, 2190 flow [2024-06-27 18:58:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2190, PETRI_PLACES=151, PETRI_TRANSITIONS=228} [2024-06-27 18:58:57,503 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-27 18:58:57,503 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 228 transitions, 2190 flow [2024-06-27 18:58:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-27 18:58:57,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:57,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:58:57,503 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:57,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1403053048, now seen corresponding path program 1 times [2024-06-27 18:58:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:57,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624276901] [2024-06-27 18:58:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624276901] [2024-06-27 18:59:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624276901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682504158] [2024-06-27 18:59:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:00,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:00,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 228 transitions, 2190 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:00,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:00,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:00,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:02,670 INFO L124 PetriNetUnfolderBase]: 5920/9100 cut-off events. [2024-06-27 18:59:02,671 INFO L125 PetriNetUnfolderBase]: For 186961/186961 co-relation queries the response was YES. [2024-06-27 18:59:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48407 conditions, 9100 events. 5920/9100 cut-off events. For 186961/186961 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 54688 event pairs, 1208 based on Foata normal form. 32/9130 useless extension candidates. Maximal degree in co-relation 48338. Up to 7051 conditions per place. [2024-06-27 18:59:02,737 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 245 selfloop transitions, 58 changer transitions 0/310 dead transitions. [2024-06-27 18:59:02,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 310 transitions, 3278 flow [2024-06-27 18:59:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:59:02,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-27 18:59:02,738 INFO L175 Difference]: Start difference. First operand has 151 places, 228 transitions, 2190 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:59:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 310 transitions, 3278 flow [2024-06-27 18:59:02,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 310 transitions, 3196 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 18:59:02,957 INFO L231 Difference]: Finished difference. Result has 156 places, 232 transitions, 2333 flow [2024-06-27 18:59:02,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2333, PETRI_PLACES=156, PETRI_TRANSITIONS=232} [2024-06-27 18:59:02,958 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-27 18:59:02,958 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 232 transitions, 2333 flow [2024-06-27 18:59:02,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:02,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:02,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:02,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:59:02,958 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:02,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:02,959 INFO L85 PathProgramCache]: Analyzing trace with hash -651606182, now seen corresponding path program 2 times [2024-06-27 18:59:02,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:02,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062038950] [2024-06-27 18:59:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:02,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062038950] [2024-06-27 18:59:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062038950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:05,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:05,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:05,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89325511] [2024-06-27 18:59:05,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:05,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:05,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 232 transitions, 2333 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:07,803 INFO L124 PetriNetUnfolderBase]: 5848/8983 cut-off events. [2024-06-27 18:59:07,803 INFO L125 PetriNetUnfolderBase]: For 180179/180179 co-relation queries the response was YES. [2024-06-27 18:59:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47504 conditions, 8983 events. 5848/8983 cut-off events. For 180179/180179 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 53759 event pairs, 1596 based on Foata normal form. 40/9021 useless extension candidates. Maximal degree in co-relation 47434. Up to 7727 conditions per place. [2024-06-27 18:59:07,873 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 259 selfloop transitions, 40 changer transitions 0/306 dead transitions. [2024-06-27 18:59:07,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 306 transitions, 3197 flow [2024-06-27 18:59:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:59:07,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 18:59:07,875 INFO L175 Difference]: Start difference. First operand has 156 places, 232 transitions, 2333 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:59:07,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 306 transitions, 3197 flow [2024-06-27 18:59:08,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 306 transitions, 2975 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:08,226 INFO L231 Difference]: Finished difference. Result has 159 places, 232 transitions, 2203 flow [2024-06-27 18:59:08,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2203, PETRI_PLACES=159, PETRI_TRANSITIONS=232} [2024-06-27 18:59:08,226 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-27 18:59:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 232 transitions, 2203 flow [2024-06-27 18:59:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:08,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:08,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:59:08,227 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:08,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash -532845500, now seen corresponding path program 3 times [2024-06-27 18:59:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:08,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208148881] [2024-06-27 18:59:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:10,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208148881] [2024-06-27 18:59:10,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208148881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:10,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:10,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:10,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794145016] [2024-06-27 18:59:10,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:10,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:10,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:10,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:10,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 232 transitions, 2203 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:10,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:10,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:10,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:13,748 INFO L124 PetriNetUnfolderBase]: 6038/9292 cut-off events. [2024-06-27 18:59:13,749 INFO L125 PetriNetUnfolderBase]: For 175101/175101 co-relation queries the response was YES. [2024-06-27 18:59:13,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47822 conditions, 9292 events. 6038/9292 cut-off events. For 175101/175101 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56021 event pairs, 1390 based on Foata normal form. 20/9307 useless extension candidates. Maximal degree in co-relation 47751. Up to 7680 conditions per place. [2024-06-27 18:59:13,808 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 208 selfloop transitions, 92 changer transitions 0/307 dead transitions. [2024-06-27 18:59:13,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 307 transitions, 3129 flow [2024-06-27 18:59:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:59:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2024-06-27 18:59:13,810 INFO L175 Difference]: Start difference. First operand has 159 places, 232 transitions, 2203 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:59:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 307 transitions, 3129 flow [2024-06-27 18:59:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 307 transitions, 2986 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 18:59:14,019 INFO L231 Difference]: Finished difference. Result has 159 places, 234 transitions, 2320 flow [2024-06-27 18:59:14,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2320, PETRI_PLACES=159, PETRI_TRANSITIONS=234} [2024-06-27 18:59:14,020 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-27 18:59:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 234 transitions, 2320 flow [2024-06-27 18:59:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:14,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:14,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:59:14,020 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:14,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash -532849220, now seen corresponding path program 4 times [2024-06-27 18:59:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323003179] [2024-06-27 18:59:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:16,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:16,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323003179] [2024-06-27 18:59:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323003179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:16,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:16,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:16,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353440147] [2024-06-27 18:59:16,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:16,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:16,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:16,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 234 transitions, 2320 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:16,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:16,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:16,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:19,889 INFO L124 PetriNetUnfolderBase]: 6186/9520 cut-off events. [2024-06-27 18:59:19,889 INFO L125 PetriNetUnfolderBase]: For 189248/189248 co-relation queries the response was YES. [2024-06-27 18:59:19,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49686 conditions, 9520 events. 6186/9520 cut-off events. For 189248/189248 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 57618 event pairs, 1366 based on Foata normal form. 16/9531 useless extension candidates. Maximal degree in co-relation 49614. Up to 7678 conditions per place. [2024-06-27 18:59:19,965 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 218 selfloop transitions, 97 changer transitions 0/322 dead transitions. [2024-06-27 18:59:19,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 322 transitions, 3324 flow [2024-06-27 18:59:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:59:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:59:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 18:59:19,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 18:59:19,967 INFO L175 Difference]: Start difference. First operand has 159 places, 234 transitions, 2320 flow. Second operand 10 states and 260 transitions. [2024-06-27 18:59:19,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 322 transitions, 3324 flow [2024-06-27 18:59:20,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 322 transitions, 3092 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:20,261 INFO L231 Difference]: Finished difference. Result has 162 places, 236 transitions, 2361 flow [2024-06-27 18:59:20,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2361, PETRI_PLACES=162, PETRI_TRANSITIONS=236} [2024-06-27 18:59:20,262 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 110 predicate places. [2024-06-27 18:59:20,262 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 236 transitions, 2361 flow [2024-06-27 18:59:20,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:20,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:20,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:59:20,263 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:20,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash -333399560, now seen corresponding path program 5 times [2024-06-27 18:59:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:20,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203364972] [2024-06-27 18:59:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:20,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203364972] [2024-06-27 18:59:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203364972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:22,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:22,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:22,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336221872] [2024-06-27 18:59:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:22,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:22,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 236 transitions, 2361 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:25,407 INFO L124 PetriNetUnfolderBase]: 6376/9830 cut-off events. [2024-06-27 18:59:25,407 INFO L125 PetriNetUnfolderBase]: For 204291/204295 co-relation queries the response was YES. [2024-06-27 18:59:25,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51373 conditions, 9830 events. 6376/9830 cut-off events. For 204291/204295 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 60029 event pairs, 1410 based on Foata normal form. 24/9849 useless extension candidates. Maximal degree in co-relation 51300. Up to 8198 conditions per place. [2024-06-27 18:59:25,477 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 203 selfloop transitions, 93 changer transitions 0/303 dead transitions. [2024-06-27 18:59:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 303 transitions, 3257 flow [2024-06-27 18:59:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:59:25,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-27 18:59:25,478 INFO L175 Difference]: Start difference. First operand has 162 places, 236 transitions, 2361 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:59:25,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 303 transitions, 3257 flow [2024-06-27 18:59:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 303 transitions, 3002 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:25,715 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 2376 flow [2024-06-27 18:59:25,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2376, PETRI_PLACES=162, PETRI_TRANSITIONS=238} [2024-06-27 18:59:25,715 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 110 predicate places. [2024-06-27 18:59:25,716 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 2376 flow [2024-06-27 18:59:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:25,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:25,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:59:25,716 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:25,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1366969626, now seen corresponding path program 1 times [2024-06-27 18:59:25,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:25,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478515075] [2024-06-27 18:59:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:28,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478515075] [2024-06-27 18:59:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478515075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812348800] [2024-06-27 18:59:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:28,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:28,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:28,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 238 transitions, 2376 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:28,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:28,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:28,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:31,238 INFO L124 PetriNetUnfolderBase]: 6708/10342 cut-off events. [2024-06-27 18:59:31,238 INFO L125 PetriNetUnfolderBase]: For 234566/234570 co-relation queries the response was YES. [2024-06-27 18:59:31,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55140 conditions, 10342 events. 6708/10342 cut-off events. For 234566/234570 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 63796 event pairs, 1434 based on Foata normal form. 16/10353 useless extension candidates. Maximal degree in co-relation 55066. Up to 7464 conditions per place. [2024-06-27 18:59:31,325 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 201 selfloop transitions, 103 changer transitions 0/311 dead transitions. [2024-06-27 18:59:31,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 311 transitions, 3514 flow [2024-06-27 18:59:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:59:31,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-27 18:59:31,327 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 2376 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:59:31,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 311 transitions, 3514 flow [2024-06-27 18:59:31,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 311 transitions, 3272 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:31,609 INFO L231 Difference]: Finished difference. Result has 164 places, 242 transitions, 2503 flow [2024-06-27 18:59:31,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2503, PETRI_PLACES=164, PETRI_TRANSITIONS=242} [2024-06-27 18:59:31,609 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 112 predicate places. [2024-06-27 18:59:31,609 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 242 transitions, 2503 flow [2024-06-27 18:59:31,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:31,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:31,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:59:31,610 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:31,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash 817261108, now seen corresponding path program 6 times [2024-06-27 18:59:31,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:31,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939128566] [2024-06-27 18:59:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:31,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:33,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939128566] [2024-06-27 18:59:33,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939128566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:33,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:33,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249171231] [2024-06-27 18:59:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:33,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:33,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 242 transitions, 2503 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:33,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:33,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:33,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:36,770 INFO L124 PetriNetUnfolderBase]: 6898/10619 cut-off events. [2024-06-27 18:59:36,771 INFO L125 PetriNetUnfolderBase]: For 255217/255229 co-relation queries the response was YES. [2024-06-27 18:59:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57020 conditions, 10619 events. 6898/10619 cut-off events. For 255217/255229 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 65698 event pairs, 1576 based on Foata normal form. 28/10627 useless extension candidates. Maximal degree in co-relation 56945. Up to 9000 conditions per place. [2024-06-27 18:59:36,863 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 208 selfloop transitions, 91 changer transitions 0/306 dead transitions. [2024-06-27 18:59:36,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 306 transitions, 3407 flow [2024-06-27 18:59:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:59:36,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:59:36,865 INFO L175 Difference]: Start difference. First operand has 164 places, 242 transitions, 2503 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:59:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 306 transitions, 3407 flow [2024-06-27 18:59:37,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 306 transitions, 3230 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 18:59:37,255 INFO L231 Difference]: Finished difference. Result has 168 places, 244 transitions, 2600 flow [2024-06-27 18:59:37,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=168, PETRI_TRANSITIONS=244} [2024-06-27 18:59:37,255 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-27 18:59:37,255 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 244 transitions, 2600 flow [2024-06-27 18:59:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:37,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:37,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:59:37,256 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1514707958, now seen corresponding path program 7 times [2024-06-27 18:59:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71095777] [2024-06-27 18:59:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:40,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:40,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71095777] [2024-06-27 18:59:40,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71095777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:40,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:40,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:40,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791578854] [2024-06-27 18:59:40,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:40,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:40,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:40,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:40,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 244 transitions, 2600 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:40,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:40,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:40,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:43,218 INFO L124 PetriNetUnfolderBase]: 6862/10547 cut-off events. [2024-06-27 18:59:43,219 INFO L125 PetriNetUnfolderBase]: For 244104/244104 co-relation queries the response was YES. [2024-06-27 18:59:43,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56242 conditions, 10547 events. 6862/10547 cut-off events. For 244104/244104 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 65010 event pairs, 1664 based on Foata normal form. 20/10540 useless extension candidates. Maximal degree in co-relation 56165. Up to 8944 conditions per place. [2024-06-27 18:59:43,298 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 212 selfloop transitions, 95 changer transitions 0/314 dead transitions. [2024-06-27 18:59:43,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 3470 flow [2024-06-27 18:59:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:59:43,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 18:59:43,299 INFO L175 Difference]: Start difference. First operand has 168 places, 244 transitions, 2600 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:59:43,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 3470 flow [2024-06-27 18:59:43,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 314 transitions, 3190 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:43,725 INFO L231 Difference]: Finished difference. Result has 171 places, 244 transitions, 2518 flow [2024-06-27 18:59:43,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=171, PETRI_TRANSITIONS=244} [2024-06-27 18:59:43,726 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-27 18:59:43,726 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 244 transitions, 2518 flow [2024-06-27 18:59:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:43,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:59:43,726 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:43,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1386915260, now seen corresponding path program 8 times [2024-06-27 18:59:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:43,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663034363] [2024-06-27 18:59:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663034363] [2024-06-27 18:59:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663034363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:46,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:46,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:46,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296168006] [2024-06-27 18:59:46,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:46,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 244 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:46,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:49,555 INFO L124 PetriNetUnfolderBase]: 6910/10616 cut-off events. [2024-06-27 18:59:49,555 INFO L125 PetriNetUnfolderBase]: For 229908/229908 co-relation queries the response was YES. [2024-06-27 18:59:49,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55132 conditions, 10616 events. 6910/10616 cut-off events. For 229908/229908 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 65358 event pairs, 1636 based on Foata normal form. 16/10605 useless extension candidates. Maximal degree in co-relation 55054. Up to 8794 conditions per place. [2024-06-27 18:59:49,651 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 222 selfloop transitions, 100 changer transitions 0/329 dead transitions. [2024-06-27 18:59:49,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 329 transitions, 3546 flow [2024-06-27 18:59:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:59:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:59:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 18:59:49,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 18:59:49,654 INFO L175 Difference]: Start difference. First operand has 171 places, 244 transitions, 2518 flow. Second operand 10 states and 254 transitions. [2024-06-27 18:59:49,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 329 transitions, 3546 flow [2024-06-27 18:59:49,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 329 transitions, 3318 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:49,925 INFO L231 Difference]: Finished difference. Result has 173 places, 246 transitions, 2585 flow [2024-06-27 18:59:49,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2585, PETRI_PLACES=173, PETRI_TRANSITIONS=246} [2024-06-27 18:59:49,925 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-27 18:59:49,925 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 246 transitions, 2585 flow [2024-06-27 18:59:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:49,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:49,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:59:49,926 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:49,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1517876388, now seen corresponding path program 2 times [2024-06-27 18:59:49,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:49,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812088815] [2024-06-27 18:59:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:52,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812088815] [2024-06-27 18:59:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812088815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:52,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304913120] [2024-06-27 18:59:52,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:52,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:52,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:52,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 246 transitions, 2585 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:55,393 INFO L124 PetriNetUnfolderBase]: 7016/10829 cut-off events. [2024-06-27 18:59:55,393 INFO L125 PetriNetUnfolderBase]: For 246496/246508 co-relation queries the response was YES. [2024-06-27 18:59:55,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56630 conditions, 10829 events. 7016/10829 cut-off events. For 246496/246508 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 67521 event pairs, 1570 based on Foata normal form. 20/10829 useless extension candidates. Maximal degree in co-relation 56551. Up to 9000 conditions per place. [2024-06-27 18:59:55,492 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 212 selfloop transitions, 94 changer transitions 0/313 dead transitions. [2024-06-27 18:59:55,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 313 transitions, 3529 flow [2024-06-27 18:59:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:59:55,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 18:59:55,494 INFO L175 Difference]: Start difference. First operand has 173 places, 246 transitions, 2585 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:59:55,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 313 transitions, 3529 flow [2024-06-27 18:59:55,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 313 transitions, 3252 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:55,871 INFO L231 Difference]: Finished difference. Result has 173 places, 248 transitions, 2595 flow [2024-06-27 18:59:55,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2595, PETRI_PLACES=173, PETRI_TRANSITIONS=248} [2024-06-27 18:59:55,872 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-27 18:59:55,872 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 248 transitions, 2595 flow [2024-06-27 18:59:55,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:55,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:55,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:59:55,873 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:55,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1386746228, now seen corresponding path program 3 times [2024-06-27 18:59:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:55,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306726696] [2024-06-27 18:59:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306726696] [2024-06-27 18:59:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306726696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157022253] [2024-06-27 18:59:58,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:58,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:59:58,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 248 transitions, 2595 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:58,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:58,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:59:58,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:01,024 INFO L124 PetriNetUnfolderBase]: 6996/10797 cut-off events. [2024-06-27 19:00:01,024 INFO L125 PetriNetUnfolderBase]: For 237659/237671 co-relation queries the response was YES. [2024-06-27 19:00:01,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55247 conditions, 10797 events. 6996/10797 cut-off events. For 237659/237671 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 67115 event pairs, 1433 based on Foata normal form. 20/10797 useless extension candidates. Maximal degree in co-relation 55167. Up to 7288 conditions per place. [2024-06-27 19:00:01,281 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 191 selfloop transitions, 114 changer transitions 0/312 dead transitions. [2024-06-27 19:00:01,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 312 transitions, 3457 flow [2024-06-27 19:00:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:00:01,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:00:01,284 INFO L175 Difference]: Start difference. First operand has 173 places, 248 transitions, 2595 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:00:01,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 312 transitions, 3457 flow [2024-06-27 19:00:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 312 transitions, 3196 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:01,608 INFO L231 Difference]: Finished difference. Result has 174 places, 249 transitions, 2591 flow [2024-06-27 19:00:01,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2591, PETRI_PLACES=174, PETRI_TRANSITIONS=249} [2024-06-27 19:00:01,609 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-27 19:00:01,609 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 249 transitions, 2591 flow [2024-06-27 19:00:01,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:01,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:01,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:01,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:00:01,609 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:01,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1800076537, now seen corresponding path program 1 times [2024-06-27 19:00:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:01,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146795652] [2024-06-27 19:00:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:01,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146795652] [2024-06-27 19:00:03,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146795652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:03,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:03,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:00:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103290779] [2024-06-27 19:00:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:00:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:00:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:00:03,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:03,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 249 transitions, 2591 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:03,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:03,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:03,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:06,102 INFO L124 PetriNetUnfolderBase]: 7042/10871 cut-off events. [2024-06-27 19:00:06,102 INFO L125 PetriNetUnfolderBase]: For 235654/235657 co-relation queries the response was YES. [2024-06-27 19:00:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55766 conditions, 10871 events. 7042/10871 cut-off events. For 235654/235657 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 67887 event pairs, 1904 based on Foata normal form. 4/10872 useless extension candidates. Maximal degree in co-relation 55685. Up to 10036 conditions per place. [2024-06-27 19:00:06,191 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 252 selfloop transitions, 30 changer transitions 0/289 dead transitions. [2024-06-27 19:00:06,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 289 transitions, 3574 flow [2024-06-27 19:00:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:00:06,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 19:00:06,192 INFO L175 Difference]: Start difference. First operand has 174 places, 249 transitions, 2591 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:00:06,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 289 transitions, 3574 flow [2024-06-27 19:00:06,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 289 transitions, 3269 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:06,560 INFO L231 Difference]: Finished difference. Result has 175 places, 253 transitions, 2454 flow [2024-06-27 19:00:06,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2454, PETRI_PLACES=175, PETRI_TRANSITIONS=253} [2024-06-27 19:00:06,561 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 123 predicate places. [2024-06-27 19:00:06,561 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 253 transitions, 2454 flow [2024-06-27 19:00:06,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:06,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:06,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:00:06,561 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:06,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1801522873, now seen corresponding path program 1 times [2024-06-27 19:00:06,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:06,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150168033] [2024-06-27 19:00:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:08,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150168033] [2024-06-27 19:00:08,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150168033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:08,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:08,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:08,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131577950] [2024-06-27 19:00:08,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:08,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:08,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:08,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 253 transitions, 2454 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:08,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:08,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:08,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:11,583 INFO L124 PetriNetUnfolderBase]: 7216/11100 cut-off events. [2024-06-27 19:00:11,584 INFO L125 PetriNetUnfolderBase]: For 240680/240680 co-relation queries the response was YES. [2024-06-27 19:00:11,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56089 conditions, 11100 events. 7216/11100 cut-off events. For 240680/240680 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 68928 event pairs, 2022 based on Foata normal form. 4/11087 useless extension candidates. Maximal degree in co-relation 56006. Up to 9004 conditions per place. [2024-06-27 19:00:11,674 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 263 selfloop transitions, 62 changer transitions 0/332 dead transitions. [2024-06-27 19:00:11,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 332 transitions, 4097 flow [2024-06-27 19:00:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:00:11,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-27 19:00:11,675 INFO L175 Difference]: Start difference. First operand has 175 places, 253 transitions, 2454 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:00:11,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 332 transitions, 4097 flow [2024-06-27 19:00:12,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 332 transitions, 4015 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:12,025 INFO L231 Difference]: Finished difference. Result has 181 places, 274 transitions, 2878 flow [2024-06-27 19:00:12,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2878, PETRI_PLACES=181, PETRI_TRANSITIONS=274} [2024-06-27 19:00:12,026 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-06-27 19:00:12,026 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 274 transitions, 2878 flow [2024-06-27 19:00:12,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:12,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:12,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:12,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:00:12,027 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:12,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1756535579, now seen corresponding path program 2 times [2024-06-27 19:00:12,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:12,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740109054] [2024-06-27 19:00:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:14,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:14,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740109054] [2024-06-27 19:00:14,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740109054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:14,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:14,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:14,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32011658] [2024-06-27 19:00:14,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:14,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:14,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:14,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:14,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 274 transitions, 2878 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:14,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:14,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:14,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:17,009 INFO L124 PetriNetUnfolderBase]: 7220/11048 cut-off events. [2024-06-27 19:00:17,009 INFO L125 PetriNetUnfolderBase]: For 251105/251105 co-relation queries the response was YES. [2024-06-27 19:00:17,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59041 conditions, 11048 events. 7220/11048 cut-off events. For 251105/251105 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 68599 event pairs, 1959 based on Foata normal form. 2/11046 useless extension candidates. Maximal degree in co-relation 58955. Up to 10276 conditions per place. [2024-06-27 19:00:17,105 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 275 selfloop transitions, 37 changer transitions 0/319 dead transitions. [2024-06-27 19:00:17,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 3897 flow [2024-06-27 19:00:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:00:17,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 19:00:17,106 INFO L175 Difference]: Start difference. First operand has 181 places, 274 transitions, 2878 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:00:17,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 3897 flow [2024-06-27 19:00:17,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 319 transitions, 3855 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:17,565 INFO L231 Difference]: Finished difference. Result has 187 places, 278 transitions, 3006 flow [2024-06-27 19:00:17,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3006, PETRI_PLACES=187, PETRI_TRANSITIONS=278} [2024-06-27 19:00:17,565 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2024-06-27 19:00:17,565 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 278 transitions, 3006 flow [2024-06-27 19:00:17,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:17,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:17,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:17,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:00:17,566 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:17,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1916103305, now seen corresponding path program 2 times [2024-06-27 19:00:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718943979] [2024-06-27 19:00:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:19,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718943979] [2024-06-27 19:00:19,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718943979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:19,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:19,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:19,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056432182] [2024-06-27 19:00:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:19,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:19,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 278 transitions, 3006 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:19,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:19,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:19,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:23,019 INFO L124 PetriNetUnfolderBase]: 8189/12421 cut-off events. [2024-06-27 19:00:23,019 INFO L125 PetriNetUnfolderBase]: For 309876/309876 co-relation queries the response was YES. [2024-06-27 19:00:23,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67953 conditions, 12421 events. 8189/12421 cut-off events. For 309876/309876 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 76774 event pairs, 1849 based on Foata normal form. 6/12414 useless extension candidates. Maximal degree in co-relation 67864. Up to 10369 conditions per place. [2024-06-27 19:00:23,151 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 293 selfloop transitions, 70 changer transitions 0/370 dead transitions. [2024-06-27 19:00:23,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 370 transitions, 4739 flow [2024-06-27 19:00:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:00:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:00:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:00:23,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 19:00:23,153 INFO L175 Difference]: Start difference. First operand has 187 places, 278 transitions, 3006 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:00:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 370 transitions, 4739 flow [2024-06-27 19:00:23,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 370 transitions, 4629 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:23,712 INFO L231 Difference]: Finished difference. Result has 194 places, 306 transitions, 3529 flow [2024-06-27 19:00:23,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3529, PETRI_PLACES=194, PETRI_TRANSITIONS=306} [2024-06-27 19:00:23,712 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-27 19:00:23,713 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 306 transitions, 3529 flow [2024-06-27 19:00:23,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:23,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:23,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:00:23,713 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:23,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2069609335, now seen corresponding path program 3 times [2024-06-27 19:00:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535884619] [2024-06-27 19:00:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:25,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535884619] [2024-06-27 19:00:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535884619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:25,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:25,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107695557] [2024-06-27 19:00:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:25,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:25,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:25,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:25,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 306 transitions, 3529 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:25,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:25,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:28,790 INFO L124 PetriNetUnfolderBase]: 8179/12461 cut-off events. [2024-06-27 19:00:28,790 INFO L125 PetriNetUnfolderBase]: For 339842/339842 co-relation queries the response was YES. [2024-06-27 19:00:28,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71902 conditions, 12461 events. 8179/12461 cut-off events. For 339842/339842 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 77620 event pairs, 1927 based on Foata normal form. 6/12454 useless extension candidates. Maximal degree in co-relation 71809. Up to 10368 conditions per place. [2024-06-27 19:00:28,906 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 286 selfloop transitions, 75 changer transitions 0/368 dead transitions. [2024-06-27 19:00:28,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 368 transitions, 4967 flow [2024-06-27 19:00:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:00:28,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:00:28,908 INFO L175 Difference]: Start difference. First operand has 194 places, 306 transitions, 3529 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:00:28,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 368 transitions, 4967 flow [2024-06-27 19:00:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 368 transitions, 4688 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:29,800 INFO L231 Difference]: Finished difference. Result has 199 places, 318 transitions, 3742 flow [2024-06-27 19:00:29,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3742, PETRI_PLACES=199, PETRI_TRANSITIONS=318} [2024-06-27 19:00:29,800 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 147 predicate places. [2024-06-27 19:00:29,800 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 318 transitions, 3742 flow [2024-06-27 19:00:29,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:29,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:29,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:29,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:00:29,801 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:29,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2069609149, now seen corresponding path program 3 times [2024-06-27 19:00:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:29,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588665007] [2024-06-27 19:00:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:29,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:31,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588665007] [2024-06-27 19:00:31,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588665007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:31,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:31,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:00:31,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769329213] [2024-06-27 19:00:31,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:31,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:00:31,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:00:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:00:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:31,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 318 transitions, 3742 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:31,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:31,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:34,448 INFO L124 PetriNetUnfolderBase]: 8173/12427 cut-off events. [2024-06-27 19:00:34,448 INFO L125 PetriNetUnfolderBase]: For 336420/336420 co-relation queries the response was YES. [2024-06-27 19:00:34,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71661 conditions, 12427 events. 8173/12427 cut-off events. For 336420/336420 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 77845 event pairs, 2197 based on Foata normal form. 2/12427 useless extension candidates. Maximal degree in co-relation 71565. Up to 11727 conditions per place. [2024-06-27 19:00:34,589 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 326 selfloop transitions, 19 changer transitions 0/352 dead transitions. [2024-06-27 19:00:34,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 352 transitions, 4592 flow [2024-06-27 19:00:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:00:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 19:00:34,591 INFO L175 Difference]: Start difference. First operand has 199 places, 318 transitions, 3742 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:00:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 352 transitions, 4592 flow [2024-06-27 19:00:35,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 352 transitions, 4401 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:35,531 INFO L231 Difference]: Finished difference. Result has 203 places, 318 transitions, 3596 flow [2024-06-27 19:00:35,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3596, PETRI_PLACES=203, PETRI_TRANSITIONS=318} [2024-06-27 19:00:35,532 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2024-06-27 19:00:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 318 transitions, 3596 flow [2024-06-27 19:00:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:35,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:00:35,532 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1395882363, now seen corresponding path program 1 times [2024-06-27 19:00:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710482517] [2024-06-27 19:00:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:38,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710482517] [2024-06-27 19:00:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710482517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:38,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:38,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:38,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556468646] [2024-06-27 19:00:38,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:38,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:38,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:38,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:38,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 318 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:38,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:38,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:38,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:41,843 INFO L124 PetriNetUnfolderBase]: 8380/12780 cut-off events. [2024-06-27 19:00:41,843 INFO L125 PetriNetUnfolderBase]: For 351367/351367 co-relation queries the response was YES. [2024-06-27 19:00:41,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72512 conditions, 12780 events. 8380/12780 cut-off events. For 351367/351367 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 79992 event pairs, 1891 based on Foata normal form. 14/12781 useless extension candidates. Maximal degree in co-relation 72414. Up to 11420 conditions per place. [2024-06-27 19:00:41,969 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 322 selfloop transitions, 39 changer transitions 0/368 dead transitions. [2024-06-27 19:00:41,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 368 transitions, 4721 flow [2024-06-27 19:00:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:00:41,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:00:41,971 INFO L175 Difference]: Start difference. First operand has 203 places, 318 transitions, 3596 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:00:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 368 transitions, 4721 flow [2024-06-27 19:00:42,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 368 transitions, 4659 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:42,753 INFO L231 Difference]: Finished difference. Result has 204 places, 320 transitions, 3653 flow [2024-06-27 19:00:42,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3653, PETRI_PLACES=204, PETRI_TRANSITIONS=320} [2024-06-27 19:00:42,754 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 152 predicate places. [2024-06-27 19:00:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 320 transitions, 3653 flow [2024-06-27 19:00:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:42,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:42,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:00:42,754 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash 239998632, now seen corresponding path program 1 times [2024-06-27 19:00:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:42,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823116838] [2024-06-27 19:00:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:44,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:44,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823116838] [2024-06-27 19:00:44,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823116838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:44,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:44,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377315102] [2024-06-27 19:00:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:44,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:44,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:44,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:44,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 320 transitions, 3653 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:44,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:44,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:44,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:48,463 INFO L124 PetriNetUnfolderBase]: 8615/13202 cut-off events. [2024-06-27 19:00:48,463 INFO L125 PetriNetUnfolderBase]: For 365176/365176 co-relation queries the response was YES. [2024-06-27 19:00:48,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76477 conditions, 13202 events. 8615/13202 cut-off events. For 365176/365176 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 83666 event pairs, 2156 based on Foata normal form. 1/13198 useless extension candidates. Maximal degree in co-relation 76378. Up to 10297 conditions per place. [2024-06-27 19:00:48,589 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 306 selfloop transitions, 95 changer transitions 0/408 dead transitions. [2024-06-27 19:00:48,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 408 transitions, 5763 flow [2024-06-27 19:00:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 19:00:48,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-27 19:00:48,590 INFO L175 Difference]: Start difference. First operand has 204 places, 320 transitions, 3653 flow. Second operand 7 states and 190 transitions. [2024-06-27 19:00:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 408 transitions, 5763 flow [2024-06-27 19:00:49,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 408 transitions, 5674 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:49,255 INFO L231 Difference]: Finished difference. Result has 209 places, 343 transitions, 4287 flow [2024-06-27 19:00:49,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4287, PETRI_PLACES=209, PETRI_TRANSITIONS=343} [2024-06-27 19:00:49,255 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-27 19:00:49,255 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 343 transitions, 4287 flow [2024-06-27 19:00:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:49,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:00:49,256 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:49,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1295941330, now seen corresponding path program 2 times [2024-06-27 19:00:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:49,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143515059] [2024-06-27 19:00:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:51,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143515059] [2024-06-27 19:00:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143515059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:51,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:51,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:51,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109126052] [2024-06-27 19:00:51,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:51,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:51,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:51,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:51,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 343 transitions, 4287 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:51,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:51,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:51,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:54,746 INFO L124 PetriNetUnfolderBase]: 8765/13371 cut-off events. [2024-06-27 19:00:54,746 INFO L125 PetriNetUnfolderBase]: For 389903/389903 co-relation queries the response was YES. [2024-06-27 19:00:54,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81227 conditions, 13371 events. 8765/13371 cut-off events. For 389903/389903 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 84220 event pairs, 1983 based on Foata normal form. 2/13371 useless extension candidates. Maximal degree in co-relation 81124. Up to 12124 conditions per place. [2024-06-27 19:00:54,907 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 354 selfloop transitions, 53 changer transitions 0/414 dead transitions. [2024-06-27 19:00:54,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 414 transitions, 5896 flow [2024-06-27 19:00:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:00:54,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 19:00:54,910 INFO L175 Difference]: Start difference. First operand has 209 places, 343 transitions, 4287 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:00:54,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 414 transitions, 5896 flow [2024-06-27 19:00:55,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 414 transitions, 5842 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:55,947 INFO L231 Difference]: Finished difference. Result has 217 places, 357 transitions, 4690 flow [2024-06-27 19:00:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4690, PETRI_PLACES=217, PETRI_TRANSITIONS=357} [2024-06-27 19:00:55,948 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 165 predicate places. [2024-06-27 19:00:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 357 transitions, 4690 flow [2024-06-27 19:00:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:55,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:55,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:00:55,949 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:55,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -893450542, now seen corresponding path program 3 times [2024-06-27 19:00:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281040728] [2024-06-27 19:00:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:57,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:57,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281040728] [2024-06-27 19:00:57,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281040728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:57,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:57,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:57,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737635562] [2024-06-27 19:00:57,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:57,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:57,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:57,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:00:57,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 357 transitions, 4690 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:57,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:57,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:00:57,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:01,409 INFO L124 PetriNetUnfolderBase]: 8788/13445 cut-off events. [2024-06-27 19:01:01,409 INFO L125 PetriNetUnfolderBase]: For 403651/403651 co-relation queries the response was YES. [2024-06-27 19:01:01,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82342 conditions, 13445 events. 8788/13445 cut-off events. For 403651/403651 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 84998 event pairs, 2361 based on Foata normal form. 1/13429 useless extension candidates. Maximal degree in co-relation 82235. Up to 10441 conditions per place. [2024-06-27 19:01:01,549 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 317 selfloop transitions, 103 changer transitions 0/427 dead transitions. [2024-06-27 19:01:01,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 427 transitions, 6727 flow [2024-06-27 19:01:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:01:01,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-27 19:01:01,551 INFO L175 Difference]: Start difference. First operand has 217 places, 357 transitions, 4690 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:01:01,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 427 transitions, 6727 flow [2024-06-27 19:01:02,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 427 transitions, 6491 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:02,563 INFO L231 Difference]: Finished difference. Result has 221 places, 363 transitions, 4925 flow [2024-06-27 19:01:02,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4925, PETRI_PLACES=221, PETRI_TRANSITIONS=363} [2024-06-27 19:01:02,563 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-27 19:01:02,564 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 363 transitions, 4925 flow [2024-06-27 19:01:02,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:02,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:02,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:01:02,564 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:02,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:02,565 INFO L85 PathProgramCache]: Analyzing trace with hash -410523018, now seen corresponding path program 4 times [2024-06-27 19:01:02,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:02,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561665305] [2024-06-27 19:01:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:02,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:04,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:04,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561665305] [2024-06-27 19:01:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561665305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:04,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219695132] [2024-06-27 19:01:04,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:04,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:04,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:04,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:04,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 363 transitions, 4925 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:04,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:04,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:04,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:08,385 INFO L124 PetriNetUnfolderBase]: 8775/13402 cut-off events. [2024-06-27 19:01:08,385 INFO L125 PetriNetUnfolderBase]: For 417388/417388 co-relation queries the response was YES. [2024-06-27 19:01:08,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83642 conditions, 13402 events. 8775/13402 cut-off events. For 417388/417388 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84476 event pairs, 2343 based on Foata normal form. 3/13388 useless extension candidates. Maximal degree in co-relation 83532. Up to 10434 conditions per place. [2024-06-27 19:01:08,510 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 314 selfloop transitions, 99 changer transitions 0/420 dead transitions. [2024-06-27 19:01:08,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 420 transitions, 6552 flow [2024-06-27 19:01:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:01:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 19:01:08,511 INFO L175 Difference]: Start difference. First operand has 221 places, 363 transitions, 4925 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:01:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 420 transitions, 6552 flow [2024-06-27 19:01:09,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 420 transitions, 6350 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:09,501 INFO L231 Difference]: Finished difference. Result has 224 places, 363 transitions, 4929 flow [2024-06-27 19:01:09,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4929, PETRI_PLACES=224, PETRI_TRANSITIONS=363} [2024-06-27 19:01:09,502 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2024-06-27 19:01:09,502 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 363 transitions, 4929 flow [2024-06-27 19:01:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:09,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:09,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:01:09,502 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:09,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash -737220172, now seen corresponding path program 5 times [2024-06-27 19:01:09,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:09,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797715453] [2024-06-27 19:01:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797715453] [2024-06-27 19:01:11,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797715453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:11,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:11,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184546545] [2024-06-27 19:01:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:11,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:11,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:11,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 363 transitions, 4929 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:11,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:11,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:15,134 INFO L124 PetriNetUnfolderBase]: 8753/13339 cut-off events. [2024-06-27 19:01:15,134 INFO L125 PetriNetUnfolderBase]: For 417679/417679 co-relation queries the response was YES. [2024-06-27 19:01:15,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82942 conditions, 13339 events. 8753/13339 cut-off events. For 417679/417679 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 83692 event pairs, 1923 based on Foata normal form. 6/13332 useless extension candidates. Maximal degree in co-relation 82832. Up to 10998 conditions per place. [2024-06-27 19:01:15,291 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 326 selfloop transitions, 92 changer transitions 0/425 dead transitions. [2024-06-27 19:01:15,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 425 transitions, 6391 flow [2024-06-27 19:01:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:01:15,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 19:01:15,293 INFO L175 Difference]: Start difference. First operand has 224 places, 363 transitions, 4929 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:01:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 425 transitions, 6391 flow [2024-06-27 19:01:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 425 transitions, 6162 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:16,649 INFO L231 Difference]: Finished difference. Result has 228 places, 364 transitions, 4951 flow [2024-06-27 19:01:16,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4951, PETRI_PLACES=228, PETRI_TRANSITIONS=364} [2024-06-27 19:01:16,649 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-27 19:01:16,649 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 364 transitions, 4951 flow [2024-06-27 19:01:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:16,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:16,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:16,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:01:16,650 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:16,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash 315039442, now seen corresponding path program 6 times [2024-06-27 19:01:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276195218] [2024-06-27 19:01:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:18,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276195218] [2024-06-27 19:01:18,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276195218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:18,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:18,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876772181] [2024-06-27 19:01:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:18,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:18,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 364 transitions, 4951 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:18,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:18,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:22,035 INFO L124 PetriNetUnfolderBase]: 8740/13327 cut-off events. [2024-06-27 19:01:22,035 INFO L125 PetriNetUnfolderBase]: For 415944/415944 co-relation queries the response was YES. [2024-06-27 19:01:22,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82419 conditions, 13327 events. 8740/13327 cut-off events. For 415944/415944 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 83755 event pairs, 1952 based on Foata normal form. 3/13317 useless extension candidates. Maximal degree in co-relation 82308. Up to 10991 conditions per place. [2024-06-27 19:01:22,196 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 317 selfloop transitions, 90 changer transitions 0/414 dead transitions. [2024-06-27 19:01:22,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 414 transitions, 6133 flow [2024-06-27 19:01:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:01:22,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 19:01:22,198 INFO L175 Difference]: Start difference. First operand has 228 places, 364 transitions, 4951 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:01:22,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 414 transitions, 6133 flow [2024-06-27 19:01:23,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 414 transitions, 5738 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-27 19:01:23,914 INFO L231 Difference]: Finished difference. Result has 228 places, 364 transitions, 4746 flow [2024-06-27 19:01:23,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4746, PETRI_PLACES=228, PETRI_TRANSITIONS=364} [2024-06-27 19:01:23,915 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-27 19:01:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 364 transitions, 4746 flow [2024-06-27 19:01:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:23,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:23,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:23,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:01:23,915 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:23,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash -884780369, now seen corresponding path program 1 times [2024-06-27 19:01:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159287861] [2024-06-27 19:01:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:26,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159287861] [2024-06-27 19:01:26,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159287861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:26,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:26,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:26,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459970604] [2024-06-27 19:01:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:26,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:26,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:26,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 364 transitions, 4746 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:26,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:29,657 INFO L124 PetriNetUnfolderBase]: 9088/13856 cut-off events. [2024-06-27 19:01:29,658 INFO L125 PetriNetUnfolderBase]: For 449907/449919 co-relation queries the response was YES. [2024-06-27 19:01:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85073 conditions, 13856 events. 9088/13856 cut-off events. For 449907/449919 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 87836 event pairs, 2184 based on Foata normal form. 16/13860 useless extension candidates. Maximal degree in co-relation 84962. Up to 10608 conditions per place. [2024-06-27 19:01:29,802 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 328 selfloop transitions, 99 changer transitions 0/434 dead transitions. [2024-06-27 19:01:29,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 434 transitions, 6615 flow [2024-06-27 19:01:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:01:29,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:01:29,804 INFO L175 Difference]: Start difference. First operand has 228 places, 364 transitions, 4746 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:01:29,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 434 transitions, 6615 flow [2024-06-27 19:01:31,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 434 transitions, 6289 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:31,012 INFO L231 Difference]: Finished difference. Result has 230 places, 375 transitions, 4942 flow [2024-06-27 19:01:31,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4942, PETRI_PLACES=230, PETRI_TRANSITIONS=375} [2024-06-27 19:01:31,013 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-06-27 19:01:31,013 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 375 transitions, 4942 flow [2024-06-27 19:01:31,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:31,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:31,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:31,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:01:31,013 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:31,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 12636445, now seen corresponding path program 2 times [2024-06-27 19:01:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512687040] [2024-06-27 19:01:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512687040] [2024-06-27 19:01:33,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512687040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:33,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:33,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:33,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913893613] [2024-06-27 19:01:33,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:33,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:33,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 375 transitions, 4942 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:33,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:33,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:37,938 INFO L124 PetriNetUnfolderBase]: 9342/14222 cut-off events. [2024-06-27 19:01:37,938 INFO L125 PetriNetUnfolderBase]: For 470369/470369 co-relation queries the response was YES. [2024-06-27 19:01:38,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89219 conditions, 14222 events. 9342/14222 cut-off events. For 470369/470369 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 90027 event pairs, 2356 based on Foata normal form. 8/14213 useless extension candidates. Maximal degree in co-relation 89105. Up to 10750 conditions per place. [2024-06-27 19:01:38,130 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 338 selfloop transitions, 126 changer transitions 0/471 dead transitions. [2024-06-27 19:01:38,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 471 transitions, 7171 flow [2024-06-27 19:01:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:01:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:01:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 19:01:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 19:01:38,132 INFO L175 Difference]: Start difference. First operand has 230 places, 375 transitions, 4942 flow. Second operand 10 states and 254 transitions. [2024-06-27 19:01:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 471 transitions, 7171 flow [2024-06-27 19:01:39,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 471 transitions, 7041 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 19:01:39,683 INFO L231 Difference]: Finished difference. Result has 240 places, 390 transitions, 5504 flow [2024-06-27 19:01:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5504, PETRI_PLACES=240, PETRI_TRANSITIONS=390} [2024-06-27 19:01:39,684 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 188 predicate places. [2024-06-27 19:01:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 390 transitions, 5504 flow [2024-06-27 19:01:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:39,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:01:39,684 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:39,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -410513935, now seen corresponding path program 3 times [2024-06-27 19:01:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:39,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876731041] [2024-06-27 19:01:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:42,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876731041] [2024-06-27 19:01:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876731041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:42,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:42,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764327766] [2024-06-27 19:01:42,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:42,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:42,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 390 transitions, 5504 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:42,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:42,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:45,904 INFO L124 PetriNetUnfolderBase]: 9326/14168 cut-off events. [2024-06-27 19:01:45,905 INFO L125 PetriNetUnfolderBase]: For 492775/492775 co-relation queries the response was YES. [2024-06-27 19:01:46,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89693 conditions, 14168 events. 9326/14168 cut-off events. For 492775/492775 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 89346 event pairs, 2352 based on Foata normal form. 8/14159 useless extension candidates. Maximal degree in co-relation 89575. Up to 10746 conditions per place. [2024-06-27 19:01:46,069 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 327 selfloop transitions, 120 changer transitions 0/454 dead transitions. [2024-06-27 19:01:46,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 454 transitions, 7102 flow [2024-06-27 19:01:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:01:46,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 19:01:46,071 INFO L175 Difference]: Start difference. First operand has 240 places, 390 transitions, 5504 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:01:46,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 454 transitions, 7102 flow [2024-06-27 19:01:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 454 transitions, 6588 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:47,511 INFO L231 Difference]: Finished difference. Result has 241 places, 390 transitions, 5239 flow [2024-06-27 19:01:47,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4990, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5239, PETRI_PLACES=241, PETRI_TRANSITIONS=390} [2024-06-27 19:01:47,512 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 189 predicate places. [2024-06-27 19:01:47,512 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 390 transitions, 5239 flow [2024-06-27 19:01:47,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:47,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:47,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:47,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:01:47,512 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:47,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash -723187619, now seen corresponding path program 4 times [2024-06-27 19:01:47,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:47,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431542878] [2024-06-27 19:01:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:49,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431542878] [2024-06-27 19:01:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431542878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583201929] [2024-06-27 19:01:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:49,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:49,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 390 transitions, 5239 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:49,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:49,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:49,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:53,575 INFO L124 PetriNetUnfolderBase]: 9602/14583 cut-off events. [2024-06-27 19:01:53,575 INFO L125 PetriNetUnfolderBase]: For 490868/490868 co-relation queries the response was YES. [2024-06-27 19:01:53,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90031 conditions, 14583 events. 9602/14583 cut-off events. For 490868/490868 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 92292 event pairs, 2049 based on Foata normal form. 12/14582 useless extension candidates. Maximal degree in co-relation 89913. Up to 11959 conditions per place. [2024-06-27 19:01:53,725 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 342 selfloop transitions, 108 changer transitions 0/457 dead transitions. [2024-06-27 19:01:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 457 transitions, 6835 flow [2024-06-27 19:01:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:01:53,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 19:01:53,726 INFO L175 Difference]: Start difference. First operand has 241 places, 390 transitions, 5239 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:01:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 457 transitions, 6835 flow [2024-06-27 19:01:54,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 457 transitions, 6585 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:54,881 INFO L231 Difference]: Finished difference. Result has 243 places, 398 transitions, 5368 flow [2024-06-27 19:01:54,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5368, PETRI_PLACES=243, PETRI_TRANSITIONS=398} [2024-06-27 19:01:54,882 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 191 predicate places. [2024-06-27 19:01:54,882 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 398 transitions, 5368 flow [2024-06-27 19:01:54,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:54,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:54,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:54,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:01:54,883 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:54,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash -737170769, now seen corresponding path program 5 times [2024-06-27 19:01:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:54,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434869088] [2024-06-27 19:01:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434869088] [2024-06-27 19:01:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434869088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:57,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:57,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:57,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843800724] [2024-06-27 19:01:57,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:57,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:01:57,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 398 transitions, 5368 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:57,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:57,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:01:57,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:00,642 INFO L124 PetriNetUnfolderBase]: 9582/14587 cut-off events. [2024-06-27 19:02:00,643 INFO L125 PetriNetUnfolderBase]: For 477184/477184 co-relation queries the response was YES. [2024-06-27 19:02:00,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89237 conditions, 14587 events. 9582/14587 cut-off events. For 477184/477184 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 92541 event pairs, 2097 based on Foata normal form. 12/14586 useless extension candidates. Maximal degree in co-relation 89118. Up to 11955 conditions per place. [2024-06-27 19:02:00,818 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 341 selfloop transitions, 99 changer transitions 0/447 dead transitions. [2024-06-27 19:02:00,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 447 transitions, 6595 flow [2024-06-27 19:02:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:02:00,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:02:00,821 INFO L175 Difference]: Start difference. First operand has 243 places, 398 transitions, 5368 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:02:00,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 447 transitions, 6595 flow [2024-06-27 19:02:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 447 transitions, 6320 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:02,489 INFO L231 Difference]: Finished difference. Result has 245 places, 398 transitions, 5306 flow [2024-06-27 19:02:02,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5093, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5306, PETRI_PLACES=245, PETRI_TRANSITIONS=398} [2024-06-27 19:02:02,490 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-27 19:02:02,490 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 398 transitions, 5306 flow [2024-06-27 19:02:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:02,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:02,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:02,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:02:02,490 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:02,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -284578230, now seen corresponding path program 1 times [2024-06-27 19:02:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:02,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736417358] [2024-06-27 19:02:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736417358] [2024-06-27 19:02:04,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736417358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:04,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:04,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:04,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266678955] [2024-06-27 19:02:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:04,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:04,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:04,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:04,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 398 transitions, 5306 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:04,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:04,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:04,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:08,432 INFO L124 PetriNetUnfolderBase]: 9980/15242 cut-off events. [2024-06-27 19:02:08,433 INFO L125 PetriNetUnfolderBase]: For 501399/501403 co-relation queries the response was YES. [2024-06-27 19:02:08,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93827 conditions, 15242 events. 9980/15242 cut-off events. For 501399/501403 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 98051 event pairs, 2405 based on Foata normal form. 6/15243 useless extension candidates. Maximal degree in co-relation 93707. Up to 11208 conditions per place. [2024-06-27 19:02:08,611 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 326 selfloop transitions, 149 changer transitions 0/482 dead transitions. [2024-06-27 19:02:08,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 482 transitions, 7410 flow [2024-06-27 19:02:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 19:02:08,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-27 19:02:08,612 INFO L175 Difference]: Start difference. First operand has 245 places, 398 transitions, 5306 flow. Second operand 7 states and 191 transitions. [2024-06-27 19:02:08,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 482 transitions, 7410 flow [2024-06-27 19:02:10,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 482 transitions, 7068 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:02:10,087 INFO L231 Difference]: Finished difference. Result has 244 places, 414 transitions, 5628 flow [2024-06-27 19:02:10,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5628, PETRI_PLACES=244, PETRI_TRANSITIONS=414} [2024-06-27 19:02:10,088 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2024-06-27 19:02:10,088 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 414 transitions, 5628 flow [2024-06-27 19:02:10,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:10,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:10,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:02:10,089 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:10,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash 676416482, now seen corresponding path program 2 times [2024-06-27 19:02:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917572594] [2024-06-27 19:02:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:12,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:12,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917572594] [2024-06-27 19:02:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917572594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:12,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:12,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409691297] [2024-06-27 19:02:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:12,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:12,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 414 transitions, 5628 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:12,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:12,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:12,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:16,655 INFO L124 PetriNetUnfolderBase]: 10026/15309 cut-off events. [2024-06-27 19:02:16,656 INFO L125 PetriNetUnfolderBase]: For 512867/512867 co-relation queries the response was YES. [2024-06-27 19:02:16,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95062 conditions, 15309 events. 10026/15309 cut-off events. For 512867/512867 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 98357 event pairs, 2420 based on Foata normal form. 2/15306 useless extension candidates. Maximal degree in co-relation 94941. Up to 11232 conditions per place. [2024-06-27 19:02:16,814 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 331 selfloop transitions, 150 changer transitions 0/488 dead transitions. [2024-06-27 19:02:16,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 488 transitions, 7329 flow [2024-06-27 19:02:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:02:16,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-27 19:02:16,816 INFO L175 Difference]: Start difference. First operand has 244 places, 414 transitions, 5628 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:02:16,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 488 transitions, 7329 flow [2024-06-27 19:02:18,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 488 transitions, 7142 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:18,154 INFO L231 Difference]: Finished difference. Result has 249 places, 418 transitions, 5843 flow [2024-06-27 19:02:18,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5843, PETRI_PLACES=249, PETRI_TRANSITIONS=418} [2024-06-27 19:02:18,155 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 197 predicate places. [2024-06-27 19:02:18,155 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 418 transitions, 5843 flow [2024-06-27 19:02:18,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:18,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:18,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:02:18,155 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:18,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1519477796, now seen corresponding path program 3 times [2024-06-27 19:02:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870276800] [2024-06-27 19:02:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:20,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870276800] [2024-06-27 19:02:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870276800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:20,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:20,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:20,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475006] [2024-06-27 19:02:20,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:20,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:20,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:20,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:20,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:20,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 418 transitions, 5843 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:20,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:20,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:20,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:24,061 INFO L124 PetriNetUnfolderBase]: 10014/15234 cut-off events. [2024-06-27 19:02:24,061 INFO L125 PetriNetUnfolderBase]: For 521071/521071 co-relation queries the response was YES. [2024-06-27 19:02:24,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95317 conditions, 15234 events. 10014/15234 cut-off events. For 521071/521071 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 97211 event pairs, 2211 based on Foata normal form. 4/15236 useless extension candidates. Maximal degree in co-relation 95195. Up to 13823 conditions per place. [2024-06-27 19:02:24,249 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 412 selfloop transitions, 53 changer transitions 0/472 dead transitions. [2024-06-27 19:02:24,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 472 transitions, 7145 flow [2024-06-27 19:02:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:02:24,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-27 19:02:24,251 INFO L175 Difference]: Start difference. First operand has 249 places, 418 transitions, 5843 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:02:24,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 472 transitions, 7145 flow [2024-06-27 19:02:26,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 472 transitions, 6751 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:26,007 INFO L231 Difference]: Finished difference. Result has 251 places, 418 transitions, 5568 flow [2024-06-27 19:02:26,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5568, PETRI_PLACES=251, PETRI_TRANSITIONS=418} [2024-06-27 19:02:26,007 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 199 predicate places. [2024-06-27 19:02:26,007 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 418 transitions, 5568 flow [2024-06-27 19:02:26,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:26,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:26,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:26,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:02:26,008 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:26,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1927160796, now seen corresponding path program 4 times [2024-06-27 19:02:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:26,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266227808] [2024-06-27 19:02:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:26,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266227808] [2024-06-27 19:02:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266227808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:28,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:28,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:28,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900352141] [2024-06-27 19:02:28,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:28,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:28,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:28,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:28,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 418 transitions, 5568 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:28,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:28,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:28,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:32,620 INFO L124 PetriNetUnfolderBase]: 10060/15348 cut-off events. [2024-06-27 19:02:32,620 INFO L125 PetriNetUnfolderBase]: For 522370/522370 co-relation queries the response was YES. [2024-06-27 19:02:32,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93928 conditions, 15348 events. 10060/15348 cut-off events. For 522370/522370 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 98328 event pairs, 2827 based on Foata normal form. 2/15333 useless extension candidates. Maximal degree in co-relation 93805. Up to 11245 conditions per place. [2024-06-27 19:02:32,814 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 343 selfloop transitions, 140 changer transitions 0/490 dead transitions. [2024-06-27 19:02:32,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 490 transitions, 7303 flow [2024-06-27 19:02:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:02:32,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-06-27 19:02:32,815 INFO L175 Difference]: Start difference. First operand has 251 places, 418 transitions, 5568 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:02:32,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 490 transitions, 7303 flow [2024-06-27 19:02:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 490 transitions, 7201 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:34,283 INFO L231 Difference]: Finished difference. Result has 253 places, 422 transitions, 5854 flow [2024-06-27 19:02:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5854, PETRI_PLACES=253, PETRI_TRANSITIONS=422} [2024-06-27 19:02:34,284 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 201 predicate places. [2024-06-27 19:02:34,284 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 422 transitions, 5854 flow [2024-06-27 19:02:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:02:34,284 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:34,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -324958708, now seen corresponding path program 5 times [2024-06-27 19:02:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:34,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170918664] [2024-06-27 19:02:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170918664] [2024-06-27 19:02:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170918664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424999161] [2024-06-27 19:02:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:36,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:36,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 422 transitions, 5854 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:36,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:36,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:36,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:40,495 INFO L124 PetriNetUnfolderBase]: 10106/15358 cut-off events. [2024-06-27 19:02:40,495 INFO L125 PetriNetUnfolderBase]: For 545696/545708 co-relation queries the response was YES. [2024-06-27 19:02:40,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96385 conditions, 15358 events. 10106/15358 cut-off events. For 545696/545708 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 98046 event pairs, 2284 based on Foata normal form. 10/15356 useless extension candidates. Maximal degree in co-relation 96261. Up to 11269 conditions per place. [2024-06-27 19:02:40,675 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 348 selfloop transitions, 136 changer transitions 0/491 dead transitions. [2024-06-27 19:02:40,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 491 transitions, 7753 flow [2024-06-27 19:02:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:02:40,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 19:02:40,677 INFO L175 Difference]: Start difference. First operand has 253 places, 422 transitions, 5854 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:02:40,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 491 transitions, 7753 flow [2024-06-27 19:02:42,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 491 transitions, 7574 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:42,244 INFO L231 Difference]: Finished difference. Result has 256 places, 425 transitions, 6008 flow [2024-06-27 19:02:42,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5677, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6008, PETRI_PLACES=256, PETRI_TRANSITIONS=425} [2024-06-27 19:02:42,245 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 204 predicate places. [2024-06-27 19:02:42,245 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 425 transitions, 6008 flow [2024-06-27 19:02:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:42,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:42,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:02:42,246 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:42,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -244207298, now seen corresponding path program 6 times [2024-06-27 19:02:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:42,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702786814] [2024-06-27 19:02:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:42,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:44,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702786814] [2024-06-27 19:02:44,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702786814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:44,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:44,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737976808] [2024-06-27 19:02:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:44,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:44,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 425 transitions, 6008 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:44,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:44,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:44,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:48,298 INFO L124 PetriNetUnfolderBase]: 10080/15328 cut-off events. [2024-06-27 19:02:48,298 INFO L125 PetriNetUnfolderBase]: For 564004/564016 co-relation queries the response was YES. [2024-06-27 19:02:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96370 conditions, 15328 events. 10080/15328 cut-off events. For 564004/564016 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97918 event pairs, 2318 based on Foata normal form. 14/15330 useless extension candidates. Maximal degree in co-relation 96244. Up to 11250 conditions per place. [2024-06-27 19:02:48,509 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 347 selfloop transitions, 129 changer transitions 0/483 dead transitions. [2024-06-27 19:02:48,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 483 transitions, 7540 flow [2024-06-27 19:02:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:02:48,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-27 19:02:48,513 INFO L175 Difference]: Start difference. First operand has 256 places, 425 transitions, 6008 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:02:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 483 transitions, 7540 flow [2024-06-27 19:02:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 483 transitions, 7287 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:50,787 INFO L231 Difference]: Finished difference. Result has 257 places, 425 transitions, 6021 flow [2024-06-27 19:02:50,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6021, PETRI_PLACES=257, PETRI_TRANSITIONS=425} [2024-06-27 19:02:50,787 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-27 19:02:50,787 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 425 transitions, 6021 flow [2024-06-27 19:02:50,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:50,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:50,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:50,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:02:50,788 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:50,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash 391544382, now seen corresponding path program 7 times [2024-06-27 19:02:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112500939] [2024-06-27 19:02:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:53,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112500939] [2024-06-27 19:02:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112500939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:53,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:53,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162092238] [2024-06-27 19:02:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:53,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:02:53,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 425 transitions, 6021 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:53,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:53,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:02:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:57,451 INFO L124 PetriNetUnfolderBase]: 10062/15312 cut-off events. [2024-06-27 19:02:57,451 INFO L125 PetriNetUnfolderBase]: For 567615/567615 co-relation queries the response was YES. [2024-06-27 19:02:57,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95602 conditions, 15312 events. 10062/15312 cut-off events. For 567615/567615 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 97729 event pairs, 2600 based on Foata normal form. 6/15301 useless extension candidates. Maximal degree in co-relation 95478. Up to 11239 conditions per place. [2024-06-27 19:02:57,667 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 340 selfloop transitions, 144 changer transitions 0/491 dead transitions. [2024-06-27 19:02:57,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 491 transitions, 7710 flow [2024-06-27 19:02:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:02:57,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 19:02:57,668 INFO L175 Difference]: Start difference. First operand has 257 places, 425 transitions, 6021 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:02:57,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 491 transitions, 7710 flow [2024-06-27 19:02:59,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 491 transitions, 7436 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:59,370 INFO L231 Difference]: Finished difference. Result has 259 places, 426 transitions, 6092 flow [2024-06-27 19:02:59,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6092, PETRI_PLACES=259, PETRI_TRANSITIONS=426} [2024-06-27 19:02:59,370 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 207 predicate places. [2024-06-27 19:02:59,370 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 426 transitions, 6092 flow [2024-06-27 19:02:59,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:59,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:59,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:02:59,370 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:59,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 158690560, now seen corresponding path program 8 times [2024-06-27 19:02:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415285204] [2024-06-27 19:02:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:01,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415285204] [2024-06-27 19:03:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415285204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:01,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:01,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040489969] [2024-06-27 19:03:01,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:01,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:01,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:01,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 426 transitions, 6092 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:01,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:01,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:01,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:06,442 INFO L124 PetriNetUnfolderBase]: 10036/15282 cut-off events. [2024-06-27 19:03:06,442 INFO L125 PetriNetUnfolderBase]: For 562621/562621 co-relation queries the response was YES. [2024-06-27 19:03:06,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95275 conditions, 15282 events. 10036/15282 cut-off events. For 562621/562621 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 97549 event pairs, 2581 based on Foata normal form. 6/15271 useless extension candidates. Maximal degree in co-relation 95150. Up to 11220 conditions per place. [2024-06-27 19:03:06,637 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 351 selfloop transitions, 148 changer transitions 0/506 dead transitions. [2024-06-27 19:03:06,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 506 transitions, 7736 flow [2024-06-27 19:03:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 19:03:06,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 19:03:06,639 INFO L175 Difference]: Start difference. First operand has 259 places, 426 transitions, 6092 flow. Second operand 10 states and 252 transitions. [2024-06-27 19:03:06,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 506 transitions, 7736 flow [2024-06-27 19:03:08,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 506 transitions, 7391 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:08,531 INFO L231 Difference]: Finished difference. Result has 264 places, 426 transitions, 6051 flow [2024-06-27 19:03:08,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6051, PETRI_PLACES=264, PETRI_TRANSITIONS=426} [2024-06-27 19:03:08,531 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 212 predicate places. [2024-06-27 19:03:08,531 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 426 transitions, 6051 flow [2024-06-27 19:03:08,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:08,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:08,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:08,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:03:08,531 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:08,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1378986622, now seen corresponding path program 9 times [2024-06-27 19:03:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696327996] [2024-06-27 19:03:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696327996] [2024-06-27 19:03:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696327996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:03:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111161624] [2024-06-27 19:03:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:03:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:03:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:03:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 426 transitions, 6051 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:14,798 INFO L124 PetriNetUnfolderBase]: 9992/15215 cut-off events. [2024-06-27 19:03:14,798 INFO L125 PetriNetUnfolderBase]: For 551758/551758 co-relation queries the response was YES. [2024-06-27 19:03:14,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94037 conditions, 15215 events. 9992/15215 cut-off events. For 551758/551758 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 97161 event pairs, 2135 based on Foata normal form. 12/15214 useless extension candidates. Maximal degree in co-relation 93911. Up to 12442 conditions per place. [2024-06-27 19:03:14,978 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 373 selfloop transitions, 106 changer transitions 0/486 dead transitions. [2024-06-27 19:03:14,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 486 transitions, 7530 flow [2024-06-27 19:03:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:03:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:03:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:03:14,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 19:03:14,979 INFO L175 Difference]: Start difference. First operand has 264 places, 426 transitions, 6051 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:03:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 486 transitions, 7530 flow [2024-06-27 19:03:16,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 486 transitions, 7014 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 19:03:16,868 INFO L231 Difference]: Finished difference. Result has 261 places, 427 transitions, 5810 flow [2024-06-27 19:03:16,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5810, PETRI_PLACES=261, PETRI_TRANSITIONS=427} [2024-06-27 19:03:16,869 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 209 predicate places. [2024-06-27 19:03:16,869 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 427 transitions, 5810 flow [2024-06-27 19:03:16,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:16,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:16,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:03:16,870 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:16,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 324596604, now seen corresponding path program 10 times [2024-06-27 19:03:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418379889] [2024-06-27 19:03:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:19,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418379889] [2024-06-27 19:03:19,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418379889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:19,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:19,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:03:19,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012540574] [2024-06-27 19:03:19,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:19,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:03:19,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:03:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:03:19,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:19,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 427 transitions, 5810 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:19,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:19,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:19,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:22,875 INFO L124 PetriNetUnfolderBase]: 9966/15167 cut-off events. [2024-06-27 19:03:22,876 INFO L125 PetriNetUnfolderBase]: For 510169/510169 co-relation queries the response was YES. [2024-06-27 19:03:23,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92309 conditions, 15167 events. 9966/15167 cut-off events. For 510169/510169 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 96814 event pairs, 2161 based on Foata normal form. 6/15160 useless extension candidates. Maximal degree in co-relation 92183. Up to 12423 conditions per place. [2024-06-27 19:03:23,115 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 367 selfloop transitions, 101 changer transitions 0/475 dead transitions. [2024-06-27 19:03:23,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 475 transitions, 6974 flow [2024-06-27 19:03:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:03:23,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 19:03:23,116 INFO L175 Difference]: Start difference. First operand has 261 places, 427 transitions, 5810 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:03:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 475 transitions, 6974 flow [2024-06-27 19:03:25,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 475 transitions, 6709 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:25,299 INFO L231 Difference]: Finished difference. Result has 263 places, 427 transitions, 5757 flow [2024-06-27 19:03:25,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5757, PETRI_PLACES=263, PETRI_TRANSITIONS=427} [2024-06-27 19:03:25,299 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 211 predicate places. [2024-06-27 19:03:25,299 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 427 transitions, 5757 flow [2024-06-27 19:03:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:25,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:25,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:25,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:03:25,300 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1397979834, now seen corresponding path program 1 times [2024-06-27 19:03:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016060501] [2024-06-27 19:03:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:28,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016060501] [2024-06-27 19:03:28,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016060501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:28,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:28,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:28,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324546191] [2024-06-27 19:03:28,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:28,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:28,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:28,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 427 transitions, 5757 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:28,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:28,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:28,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:32,326 INFO L124 PetriNetUnfolderBase]: 10216/15674 cut-off events. [2024-06-27 19:03:32,326 INFO L125 PetriNetUnfolderBase]: For 544401/544401 co-relation queries the response was YES. [2024-06-27 19:03:32,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94344 conditions, 15674 events. 10216/15674 cut-off events. For 544401/544401 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 102101 event pairs, 2250 based on Foata normal form. 14/15675 useless extension candidates. Maximal degree in co-relation 94217. Up to 13927 conditions per place. [2024-06-27 19:03:32,556 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 430 selfloop transitions, 39 changer transitions 0/476 dead transitions. [2024-06-27 19:03:32,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 476 transitions, 7105 flow [2024-06-27 19:03:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:03:32,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:03:32,557 INFO L175 Difference]: Start difference. First operand has 263 places, 427 transitions, 5757 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:03:32,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 476 transitions, 7105 flow [2024-06-27 19:03:34,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 476 transitions, 6738 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-27 19:03:34,561 INFO L231 Difference]: Finished difference. Result has 261 places, 429 transitions, 5505 flow [2024-06-27 19:03:34,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5505, PETRI_PLACES=261, PETRI_TRANSITIONS=429} [2024-06-27 19:03:34,562 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 209 predicate places. [2024-06-27 19:03:34,562 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 429 transitions, 5505 flow [2024-06-27 19:03:34,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:34,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:34,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:34,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:03:34,562 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:34,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1413216954, now seen corresponding path program 2 times [2024-06-27 19:03:34,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:34,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851476230] [2024-06-27 19:03:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:37,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:37,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851476230] [2024-06-27 19:03:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851476230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:37,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:37,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:37,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834156899] [2024-06-27 19:03:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:37,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:37,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:37,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:37,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 429 transitions, 5505 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:37,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:37,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:37,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:41,390 INFO L124 PetriNetUnfolderBase]: 10463/16021 cut-off events. [2024-06-27 19:03:41,390 INFO L125 PetriNetUnfolderBase]: For 552733/552733 co-relation queries the response was YES. [2024-06-27 19:03:41,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95707 conditions, 16021 events. 10463/16021 cut-off events. For 552733/552733 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 104228 event pairs, 2290 based on Foata normal form. 8/16016 useless extension candidates. Maximal degree in co-relation 95579. Up to 13645 conditions per place. [2024-06-27 19:03:41,592 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 437 selfloop transitions, 38 changer transitions 0/482 dead transitions. [2024-06-27 19:03:41,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 482 transitions, 7031 flow [2024-06-27 19:03:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:03:41,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 19:03:41,593 INFO L175 Difference]: Start difference. First operand has 261 places, 429 transitions, 5505 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:03:41,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 482 transitions, 7031 flow [2024-06-27 19:03:43,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 482 transitions, 6946 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:43,304 INFO L231 Difference]: Finished difference. Result has 263 places, 431 transitions, 5534 flow [2024-06-27 19:03:43,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5534, PETRI_PLACES=263, PETRI_TRANSITIONS=431} [2024-06-27 19:03:43,304 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 211 predicate places. [2024-06-27 19:03:43,305 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 431 transitions, 5534 flow [2024-06-27 19:03:43,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:43,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:43,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:43,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:03:43,305 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:43,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash 40819260, now seen corresponding path program 1 times [2024-06-27 19:03:43,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:43,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360824370] [2024-06-27 19:03:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360824370] [2024-06-27 19:03:45,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360824370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:45,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:45,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:03:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645568515] [2024-06-27 19:03:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:03:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:03:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:03:45,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:45,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 431 transitions, 5534 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:45,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:45,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:45,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:49,621 INFO L124 PetriNetUnfolderBase]: 10501/15911 cut-off events. [2024-06-27 19:03:49,621 INFO L125 PetriNetUnfolderBase]: For 553003/553006 co-relation queries the response was YES. [2024-06-27 19:03:49,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96237 conditions, 15911 events. 10501/15911 cut-off events. For 553003/553006 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 102276 event pairs, 2342 based on Foata normal form. 4/15912 useless extension candidates. Maximal degree in co-relation 96108. Up to 14657 conditions per place. [2024-06-27 19:03:49,830 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 439 selfloop transitions, 38 changer transitions 0/484 dead transitions. [2024-06-27 19:03:49,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 484 transitions, 7144 flow [2024-06-27 19:03:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:03:49,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:03:49,832 INFO L175 Difference]: Start difference. First operand has 263 places, 431 transitions, 5534 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:03:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 484 transitions, 7144 flow [2024-06-27 19:03:51,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 484 transitions, 7095 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:51,920 INFO L231 Difference]: Finished difference. Result has 268 places, 436 transitions, 5705 flow [2024-06-27 19:03:51,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5485, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5705, PETRI_PLACES=268, PETRI_TRANSITIONS=436} [2024-06-27 19:03:51,921 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 216 predicate places. [2024-06-27 19:03:51,921 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 436 transitions, 5705 flow [2024-06-27 19:03:51,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:51,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:51,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:51,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:03:51,921 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:51,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -246993888, now seen corresponding path program 2 times [2024-06-27 19:03:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:51,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018989671] [2024-06-27 19:03:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018989671] [2024-06-27 19:03:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018989671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:03:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743076045] [2024-06-27 19:03:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:54,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:03:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:03:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:03:54,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:03:54,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 436 transitions, 5705 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:54,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:54,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:03:54,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:58,718 INFO L124 PetriNetUnfolderBase]: 10539/15975 cut-off events. [2024-06-27 19:03:58,718 INFO L125 PetriNetUnfolderBase]: For 567062/567065 co-relation queries the response was YES. [2024-06-27 19:03:58,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97398 conditions, 15975 events. 10539/15975 cut-off events. For 567062/567065 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 102947 event pairs, 2422 based on Foata normal form. 4/15976 useless extension candidates. Maximal degree in co-relation 97266. Up to 14816 conditions per place. [2024-06-27 19:03:58,907 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 438 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-27 19:03:58,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 480 transitions, 7003 flow [2024-06-27 19:03:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:03:58,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:03:58,909 INFO L175 Difference]: Start difference. First operand has 268 places, 436 transitions, 5705 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:03:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 480 transitions, 7003 flow [2024-06-27 19:04:01,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 480 transitions, 6909 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 19:04:01,098 INFO L231 Difference]: Finished difference. Result has 272 places, 438 transitions, 5732 flow [2024-06-27 19:04:01,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5732, PETRI_PLACES=272, PETRI_TRANSITIONS=438} [2024-06-27 19:04:01,099 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 220 predicate places. [2024-06-27 19:04:01,099 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 438 transitions, 5732 flow [2024-06-27 19:04:01,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:01,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:01,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:01,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:04:01,099 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:01,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 391554302, now seen corresponding path program 3 times [2024-06-27 19:04:01,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610863169] [2024-06-27 19:04:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:01,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:03,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610863169] [2024-06-27 19:04:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610863169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:03,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537385216] [2024-06-27 19:04:03,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:03,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:03,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 438 transitions, 5732 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:03,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:08,156 INFO L124 PetriNetUnfolderBase]: 10577/16046 cut-off events. [2024-06-27 19:04:08,156 INFO L125 PetriNetUnfolderBase]: For 576543/576543 co-relation queries the response was YES. [2024-06-27 19:04:08,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97866 conditions, 16046 events. 10577/16046 cut-off events. For 576543/576543 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 103550 event pairs, 2479 based on Foata normal form. 2/16044 useless extension candidates. Maximal degree in co-relation 97732. Up to 14872 conditions per place. [2024-06-27 19:04:08,386 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 441 selfloop transitions, 40 changer transitions 0/488 dead transitions. [2024-06-27 19:04:08,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 488 transitions, 7054 flow [2024-06-27 19:04:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:04:08,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-06-27 19:04:08,387 INFO L175 Difference]: Start difference. First operand has 272 places, 438 transitions, 5732 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:04:08,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 488 transitions, 7054 flow [2024-06-27 19:04:10,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 488 transitions, 6977 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:10,323 INFO L231 Difference]: Finished difference. Result has 275 places, 441 transitions, 5841 flow [2024-06-27 19:04:10,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5841, PETRI_PLACES=275, PETRI_TRANSITIONS=441} [2024-06-27 19:04:10,324 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 223 predicate places. [2024-06-27 19:04:10,324 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 441 transitions, 5841 flow [2024-06-27 19:04:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:10,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:10,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:10,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:04:10,324 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:10,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 159152088, now seen corresponding path program 1 times [2024-06-27 19:04:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:10,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751711161] [2024-06-27 19:04:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:10,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751711161] [2024-06-27 19:04:13,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751711161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:13,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:13,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:13,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964448047] [2024-06-27 19:04:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:13,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:13,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 441 transitions, 5841 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:13,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:13,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:13,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:17,955 INFO L124 PetriNetUnfolderBase]: 10653/16261 cut-off events. [2024-06-27 19:04:17,956 INFO L125 PetriNetUnfolderBase]: For 604906/604906 co-relation queries the response was YES. [2024-06-27 19:04:18,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99387 conditions, 16261 events. 10653/16261 cut-off events. For 604906/604906 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 105270 event pairs, 2947 based on Foata normal form. 4/16248 useless extension candidates. Maximal degree in co-relation 99252. Up to 12091 conditions per place. [2024-06-27 19:04:18,185 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 359 selfloop transitions, 141 changer transitions 0/507 dead transitions. [2024-06-27 19:04:18,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 507 transitions, 7403 flow [2024-06-27 19:04:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:04:18,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:04:18,187 INFO L175 Difference]: Start difference. First operand has 275 places, 441 transitions, 5841 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:04:18,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 507 transitions, 7403 flow [2024-06-27 19:04:20,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 507 transitions, 7245 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:20,639 INFO L231 Difference]: Finished difference. Result has 277 places, 444 transitions, 6043 flow [2024-06-27 19:04:20,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6043, PETRI_PLACES=277, PETRI_TRANSITIONS=444} [2024-06-27 19:04:20,640 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 225 predicate places. [2024-06-27 19:04:20,640 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 444 transitions, 6043 flow [2024-06-27 19:04:20,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:20,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:20,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:04:20,641 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:20,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1399810070, now seen corresponding path program 4 times [2024-06-27 19:04:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788501036] [2024-06-27 19:04:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:23,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788501036] [2024-06-27 19:04:23,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788501036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:23,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035521065] [2024-06-27 19:04:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:23,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:23,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 444 transitions, 6043 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:23,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:23,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:23,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:27,664 INFO L124 PetriNetUnfolderBase]: 10656/16283 cut-off events. [2024-06-27 19:04:27,664 INFO L125 PetriNetUnfolderBase]: For 616693/616693 co-relation queries the response was YES. [2024-06-27 19:04:27,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101635 conditions, 16283 events. 10656/16283 cut-off events. For 616693/616693 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 106648 event pairs, 2717 based on Foata normal form. 2/16283 useless extension candidates. Maximal degree in co-relation 101499. Up to 15147 conditions per place. [2024-06-27 19:04:27,910 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 459 selfloop transitions, 22 changer transitions 0/488 dead transitions. [2024-06-27 19:04:27,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 488 transitions, 7293 flow [2024-06-27 19:04:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:04:27,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2024-06-27 19:04:27,912 INFO L175 Difference]: Start difference. First operand has 277 places, 444 transitions, 6043 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:04:27,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 488 transitions, 7293 flow [2024-06-27 19:04:30,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 488 transitions, 6955 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:30,372 INFO L231 Difference]: Finished difference. Result has 279 places, 447 transitions, 5861 flow [2024-06-27 19:04:30,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5861, PETRI_PLACES=279, PETRI_TRANSITIONS=447} [2024-06-27 19:04:30,372 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 227 predicate places. [2024-06-27 19:04:30,372 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 447 transitions, 5861 flow [2024-06-27 19:04:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:30,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:30,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:04:30,373 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:30,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1176751868, now seen corresponding path program 2 times [2024-06-27 19:04:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010938340] [2024-06-27 19:04:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010938340] [2024-06-27 19:04:33,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010938340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:33,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:33,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827485836] [2024-06-27 19:04:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:33,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:33,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:33,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 447 transitions, 5861 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:33,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:33,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:38,247 INFO L124 PetriNetUnfolderBase]: 10906/16617 cut-off events. [2024-06-27 19:04:38,247 INFO L125 PetriNetUnfolderBase]: For 669869/669869 co-relation queries the response was YES. [2024-06-27 19:04:38,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102640 conditions, 16617 events. 10906/16617 cut-off events. For 669869/669869 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 107699 event pairs, 2324 based on Foata normal form. 14/16618 useless extension candidates. Maximal degree in co-relation 102503. Up to 13543 conditions per place. [2024-06-27 19:04:38,457 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 394 selfloop transitions, 108 changer transitions 0/509 dead transitions. [2024-06-27 19:04:38,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 509 transitions, 7275 flow [2024-06-27 19:04:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:04:38,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 19:04:38,459 INFO L175 Difference]: Start difference. First operand has 279 places, 447 transitions, 5861 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:04:38,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 509 transitions, 7275 flow [2024-06-27 19:04:40,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 509 transitions, 7157 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:40,493 INFO L231 Difference]: Finished difference. Result has 282 places, 451 transitions, 6114 flow [2024-06-27 19:04:40,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5743, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6114, PETRI_PLACES=282, PETRI_TRANSITIONS=451} [2024-06-27 19:04:40,494 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 230 predicate places. [2024-06-27 19:04:40,494 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 451 transitions, 6114 flow [2024-06-27 19:04:40,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:40,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:40,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:04:40,494 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:40,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1404883658, now seen corresponding path program 3 times [2024-06-27 19:04:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848484656] [2024-06-27 19:04:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848484656] [2024-06-27 19:04:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848484656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:43,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:43,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300721490] [2024-06-27 19:04:43,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:43,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:43,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:43,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 451 transitions, 6114 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:43,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:43,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:49,322 INFO L124 PetriNetUnfolderBase]: 11156/16987 cut-off events. [2024-06-27 19:04:49,322 INFO L125 PetriNetUnfolderBase]: For 720467/720467 co-relation queries the response was YES. [2024-06-27 19:04:49,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108432 conditions, 16987 events. 11156/16987 cut-off events. For 720467/720467 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 110269 event pairs, 2297 based on Foata normal form. 14/16988 useless extension candidates. Maximal degree in co-relation 108294. Up to 13905 conditions per place. [2024-06-27 19:04:49,526 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 400 selfloop transitions, 115 changer transitions 0/522 dead transitions. [2024-06-27 19:04:49,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 522 transitions, 7654 flow [2024-06-27 19:04:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:04:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:04:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 19:04:49,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:04:49,528 INFO L175 Difference]: Start difference. First operand has 282 places, 451 transitions, 6114 flow. Second operand 10 states and 250 transitions. [2024-06-27 19:04:49,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 522 transitions, 7654 flow [2024-06-27 19:04:51,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 522 transitions, 7325 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:51,598 INFO L231 Difference]: Finished difference. Result has 285 places, 455 transitions, 6178 flow [2024-06-27 19:04:51,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6178, PETRI_PLACES=285, PETRI_TRANSITIONS=455} [2024-06-27 19:04:51,598 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 233 predicate places. [2024-06-27 19:04:51,598 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 455 transitions, 6178 flow [2024-06-27 19:04:51,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:51,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:51,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:51,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:04:51,599 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:51,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -751059364, now seen corresponding path program 4 times [2024-06-27 19:04:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951809467] [2024-06-27 19:04:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:55,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951809467] [2024-06-27 19:04:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951809467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:55,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:55,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:04:55,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452009368] [2024-06-27 19:04:55,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:55,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:04:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:04:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:04:55,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:04:55,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 455 transitions, 6178 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:55,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:55,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:04:55,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:00,970 INFO L124 PetriNetUnfolderBase]: 12765/19372 cut-off events. [2024-06-27 19:05:00,971 INFO L125 PetriNetUnfolderBase]: For 1002173/1002173 co-relation queries the response was YES. [2024-06-27 19:05:01,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126491 conditions, 19372 events. 12765/19372 cut-off events. For 1002173/1002173 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 127570 event pairs, 2606 based on Foata normal form. 14/19373 useless extension candidates. Maximal degree in co-relation 126352. Up to 13300 conditions per place. [2024-06-27 19:05:01,214 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 408 selfloop transitions, 124 changer transitions 0/539 dead transitions. [2024-06-27 19:05:01,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 539 transitions, 8105 flow [2024-06-27 19:05:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:05:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:05:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 19:05:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-27 19:05:01,215 INFO L175 Difference]: Start difference. First operand has 285 places, 455 transitions, 6178 flow. Second operand 10 states and 257 transitions. [2024-06-27 19:05:01,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 539 transitions, 8105 flow [2024-06-27 19:05:04,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 539 transitions, 7754 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 19:05:04,247 INFO L231 Difference]: Finished difference. Result has 288 places, 464 transitions, 6428 flow [2024-06-27 19:05:04,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5827, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6428, PETRI_PLACES=288, PETRI_TRANSITIONS=464} [2024-06-27 19:05:04,247 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 236 predicate places. [2024-06-27 19:05:04,247 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 464 transitions, 6428 flow [2024-06-27 19:05:04,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:04,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:04,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:05:04,248 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:04,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 71576048, now seen corresponding path program 1 times [2024-06-27 19:05:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:04,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629178945] [2024-06-27 19:05:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:04,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629178945] [2024-06-27 19:05:04,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629178945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:04,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:04,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:05:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160902362] [2024-06-27 19:05:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:05:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:05:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:05:04,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 19:05:04,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 464 transitions, 6428 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:04,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:04,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 19:05:04,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:08,250 INFO L124 PetriNetUnfolderBase]: 9565/14808 cut-off events. [2024-06-27 19:05:08,250 INFO L125 PetriNetUnfolderBase]: For 932757/933059 co-relation queries the response was YES. [2024-06-27 19:05:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96155 conditions, 14808 events. 9565/14808 cut-off events. For 932757/933059 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 98193 event pairs, 1703 based on Foata normal form. 613/15145 useless extension candidates. Maximal degree in co-relation 96015. Up to 6792 conditions per place. [2024-06-27 19:05:08,438 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 289 selfloop transitions, 88 changer transitions 0/454 dead transitions. [2024-06-27 19:05:08,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 454 transitions, 6923 flow [2024-06-27 19:05:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:05:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:05:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 19:05:08,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6302083333333334 [2024-06-27 19:05:08,440 INFO L175 Difference]: Start difference. First operand has 288 places, 464 transitions, 6428 flow. Second operand 4 states and 121 transitions. [2024-06-27 19:05:08,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 454 transitions, 6923 flow [2024-06-27 19:05:10,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 454 transitions, 6059 flow, removed 227 selfloop flow, removed 24 redundant places. [2024-06-27 19:05:10,792 INFO L231 Difference]: Finished difference. Result has 269 places, 380 transitions, 4894 flow [2024-06-27 19:05:10,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4894, PETRI_PLACES=269, PETRI_TRANSITIONS=380} [2024-06-27 19:05:10,793 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 217 predicate places. [2024-06-27 19:05:10,793 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 380 transitions, 4894 flow [2024-06-27 19:05:10,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:10,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:10,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:05:10,793 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:10,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1585937973, now seen corresponding path program 1 times [2024-06-27 19:05:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870223815] [2024-06-27 19:05:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:13,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:13,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870223815] [2024-06-27 19:05:13,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870223815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:13,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:13,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:13,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763650899] [2024-06-27 19:05:13,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:13,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:13,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:13,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:13,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 380 transitions, 4894 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:13,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:13,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:13,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:18,867 INFO L124 PetriNetUnfolderBase]: 10513/16197 cut-off events. [2024-06-27 19:05:18,867 INFO L125 PetriNetUnfolderBase]: For 829522/829522 co-relation queries the response was YES. [2024-06-27 19:05:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102088 conditions, 16197 events. 10513/16197 cut-off events. For 829522/829522 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 106053 event pairs, 3281 based on Foata normal form. 2/16197 useless extension candidates. Maximal degree in co-relation 101957. Up to 14855 conditions per place. [2024-06-27 19:05:19,051 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 393 selfloop transitions, 44 changer transitions 4/448 dead transitions. [2024-06-27 19:05:19,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 448 transitions, 6440 flow [2024-06-27 19:05:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:05:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 19:05:19,052 INFO L175 Difference]: Start difference. First operand has 269 places, 380 transitions, 4894 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:05:19,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 448 transitions, 6440 flow [2024-06-27 19:05:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 448 transitions, 6432 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:20,898 INFO L231 Difference]: Finished difference. Result has 277 places, 386 transitions, 5152 flow [2024-06-27 19:05:20,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5152, PETRI_PLACES=277, PETRI_TRANSITIONS=386} [2024-06-27 19:05:20,899 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 225 predicate places. [2024-06-27 19:05:20,899 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 386 transitions, 5152 flow [2024-06-27 19:05:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:20,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:20,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:05:20,899 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:20,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1622637967, now seen corresponding path program 2 times [2024-06-27 19:05:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:20,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355297969] [2024-06-27 19:05:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat